cstratak / rpms / blender

Forked from rpms/blender 3 years ago
Clone
Blob Blame History Raw
diff --git a/source/blender/python/mathutils/mathutils_Matrix.c b/source/blender/python/mathutils/mathutils_Matrix.c
index 327ee4dd1c3..63137e094b7 100644
--- a/source/blender/python/mathutils/mathutils_Matrix.c
+++ b/source/blender/python/mathutils/mathutils_Matrix.c
@@ -1,3619 +1,3621 @@
 /*
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version 2
  * of the License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
 /** \file
  * \ingroup pymathutils
  */
 
 #include <Python.h>
 
 #include "mathutils.h"
 
 #include "BLI_math.h"
 #include "BLI_utildefines.h"
 
 #include "../generic/py_capi_utils.h"
 #include "../generic/python_utildefines.h"
 
 #ifndef MATH_STANDALONE
 #  include "BLI_dynstr.h"
 #  include "BLI_string.h"
 #endif
 
 typedef enum eMatrixAccess_t {
   MAT_ACCESS_ROW,
   MAT_ACCESS_COL,
 } eMatrixAccess_t;
 
 static PyObject *Matrix_copy_notest(MatrixObject *self, const float *matrix);
 static PyObject *Matrix_copy(MatrixObject *self);
 static PyObject *Matrix_deepcopy(MatrixObject *self, PyObject *args);
 static int Matrix_ass_slice(MatrixObject *self, int begin, int end, PyObject *value);
-static PyObject *matrix__apply_to_copy(PyNoArgsFunction matrix_func, MatrixObject *self);
+static PyObject *matrix__apply_to_copy(PyObject *(*matrix_func)(MatrixObject *),
+                                       MatrixObject *self);
 static PyObject *MatrixAccess_CreatePyObject(MatrixObject *matrix, const eMatrixAccess_t type);
 
 static int matrix_row_vector_check(MatrixObject *mat, VectorObject *vec, int row)
 {
   if ((vec->size != mat->num_col) || (row >= mat->num_row)) {
     PyErr_SetString(PyExc_AttributeError,
                     "Matrix(): "
                     "owner matrix has been resized since this row vector was created");
     return 0;
   }
   else {
     return 1;
   }
 }
 
 static int matrix_col_vector_check(MatrixObject *mat, VectorObject *vec, int col)
 {
   if ((vec->size != mat->num_row) || (col >= mat->num_col)) {
     PyErr_SetString(PyExc_AttributeError,
                     "Matrix(): "
                     "owner matrix has been resized since this column vector was created");
     return 0;
   }
   else {
     return 1;
   }
 }
 
 /* ----------------------------------------------------------------------------
  * matrix row callbacks
  * this is so you can do matrix[i][j] = val OR matrix.row[i][j] = val */
 
 uchar mathutils_matrix_row_cb_index = -1;
 
 static int mathutils_matrix_row_check(BaseMathObject *bmo)
 {
   MatrixObject *self = (MatrixObject *)bmo->cb_user;
   return BaseMath_ReadCallback(self);
 }
 
 static int mathutils_matrix_row_get(BaseMathObject *bmo, int row)
 {
   MatrixObject *self = (MatrixObject *)bmo->cb_user;
   int col;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return -1;
   }
   if (!matrix_row_vector_check(self, (VectorObject *)bmo, row)) {
     return -1;
   }
 
   for (col = 0; col < self->num_col; col++) {
     bmo->data[col] = MATRIX_ITEM(self, row, col);
   }
 
   return 0;
 }
 
 static int mathutils_matrix_row_set(BaseMathObject *bmo, int row)
 {
   MatrixObject *self = (MatrixObject *)bmo->cb_user;
   int col;
 
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return -1;
   }
   if (!matrix_row_vector_check(self, (VectorObject *)bmo, row)) {
     return -1;
   }
 
   for (col = 0; col < self->num_col; col++) {
     MATRIX_ITEM(self, row, col) = bmo->data[col];
   }
 
   (void)BaseMath_WriteCallback(self);
   return 0;
 }
 
 static int mathutils_matrix_row_get_index(BaseMathObject *bmo, int row, int col)
 {
   MatrixObject *self = (MatrixObject *)bmo->cb_user;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return -1;
   }
   if (!matrix_row_vector_check(self, (VectorObject *)bmo, row)) {
     return -1;
   }
 
   bmo->data[col] = MATRIX_ITEM(self, row, col);
   return 0;
 }
 
 static int mathutils_matrix_row_set_index(BaseMathObject *bmo, int row, int col)
 {
   MatrixObject *self = (MatrixObject *)bmo->cb_user;
 
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return -1;
   }
   if (!matrix_row_vector_check(self, (VectorObject *)bmo, row)) {
     return -1;
   }
 
   MATRIX_ITEM(self, row, col) = bmo->data[col];
 
   (void)BaseMath_WriteCallback(self);
   return 0;
 }
 
 Mathutils_Callback mathutils_matrix_row_cb = {
     mathutils_matrix_row_check,
     mathutils_matrix_row_get,
     mathutils_matrix_row_set,
     mathutils_matrix_row_get_index,
     mathutils_matrix_row_set_index,
 };
 
 /* ----------------------------------------------------------------------------
  * matrix row callbacks
  * this is so you can do matrix.col[i][j] = val */
 
 uchar mathutils_matrix_col_cb_index = -1;
 
 static int mathutils_matrix_col_check(BaseMathObject *bmo)
 {
   MatrixObject *self = (MatrixObject *)bmo->cb_user;
   return BaseMath_ReadCallback(self);
 }
 
 static int mathutils_matrix_col_get(BaseMathObject *bmo, int col)
 {
   MatrixObject *self = (MatrixObject *)bmo->cb_user;
   int num_row;
   int row;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return -1;
   }
   if (!matrix_col_vector_check(self, (VectorObject *)bmo, col)) {
     return -1;
   }
 
   /* for 'translation' size will always be '3' even on 4x4 vec */
   num_row = min_ii(self->num_row, ((VectorObject *)bmo)->size);
 
   for (row = 0; row < num_row; row++) {
     bmo->data[row] = MATRIX_ITEM(self, row, col);
   }
 
   return 0;
 }
 
 static int mathutils_matrix_col_set(BaseMathObject *bmo, int col)
 {
   MatrixObject *self = (MatrixObject *)bmo->cb_user;
   int num_row;
   int row;
 
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return -1;
   }
   if (!matrix_col_vector_check(self, (VectorObject *)bmo, col)) {
     return -1;
   }
 
   /* for 'translation' size will always be '3' even on 4x4 vec */
   num_row = min_ii(self->num_row, ((VectorObject *)bmo)->size);
 
   for (row = 0; row < num_row; row++) {
     MATRIX_ITEM(self, row, col) = bmo->data[row];
   }
 
   (void)BaseMath_WriteCallback(self);
   return 0;
 }
 
 static int mathutils_matrix_col_get_index(BaseMathObject *bmo, int col, int row)
 {
   MatrixObject *self = (MatrixObject *)bmo->cb_user;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return -1;
   }
   if (!matrix_col_vector_check(self, (VectorObject *)bmo, col)) {
     return -1;
   }
 
   bmo->data[row] = MATRIX_ITEM(self, row, col);
   return 0;
 }
 
 static int mathutils_matrix_col_set_index(BaseMathObject *bmo, int col, int row)
 {
   MatrixObject *self = (MatrixObject *)bmo->cb_user;
 
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return -1;
   }
   if (!matrix_col_vector_check(self, (VectorObject *)bmo, col)) {
     return -1;
   }
 
   MATRIX_ITEM(self, row, col) = bmo->data[row];
 
   (void)BaseMath_WriteCallback(self);
   return 0;
 }
 
 Mathutils_Callback mathutils_matrix_col_cb = {
     mathutils_matrix_col_check,
     mathutils_matrix_col_get,
     mathutils_matrix_col_set,
     mathutils_matrix_col_get_index,
     mathutils_matrix_col_set_index,
 };
 
 /* ----------------------------------------------------------------------------
  * matrix row callbacks
  * this is so you can do matrix.translation = val
  * note, this is _exactly like matrix.col except the 4th component is always omitted */
 
 uchar mathutils_matrix_translation_cb_index = -1;
 
 static int mathutils_matrix_translation_check(BaseMathObject *bmo)
 {
   MatrixObject *self = (MatrixObject *)bmo->cb_user;
   return BaseMath_ReadCallback(self);
 }
 
 static int mathutils_matrix_translation_get(BaseMathObject *bmo, int col)
 {
   MatrixObject *self = (MatrixObject *)bmo->cb_user;
   int row;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return -1;
   }
 
   for (row = 0; row < 3; row++) {
     bmo->data[row] = MATRIX_ITEM(self, row, col);
   }
 
   return 0;
 }
 
 static int mathutils_matrix_translation_set(BaseMathObject *bmo, int col)
 {
   MatrixObject *self = (MatrixObject *)bmo->cb_user;
   int row;
 
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return -1;
   }
 
   for (row = 0; row < 3; row++) {
     MATRIX_ITEM(self, row, col) = bmo->data[row];
   }
 
   (void)BaseMath_WriteCallback(self);
   return 0;
 }
 
 static int mathutils_matrix_translation_get_index(BaseMathObject *bmo, int col, int row)
 {
   MatrixObject *self = (MatrixObject *)bmo->cb_user;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return -1;
   }
 
   bmo->data[row] = MATRIX_ITEM(self, row, col);
   return 0;
 }
 
 static int mathutils_matrix_translation_set_index(BaseMathObject *bmo, int col, int row)
 {
   MatrixObject *self = (MatrixObject *)bmo->cb_user;
 
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return -1;
   }
 
   MATRIX_ITEM(self, row, col) = bmo->data[row];
 
   (void)BaseMath_WriteCallback(self);
   return 0;
 }
 
 Mathutils_Callback mathutils_matrix_translation_cb = {
     mathutils_matrix_translation_check,
     mathutils_matrix_translation_get,
     mathutils_matrix_translation_set,
     mathutils_matrix_translation_get_index,
     mathutils_matrix_translation_set_index,
 };
 
 /* matrix column callbacks, this is so you can do matrix.translation = Vector()  */
 
 /* ----------------------------------mathutils.Matrix() ----------------- */
 /* mat is a 1D array of floats - row[0][0], row[0][1], row[1][0], etc. */
 /* create a new matrix type */
 static PyObject *Matrix_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 {
   if (kwds && PyDict_Size(kwds)) {
     PyErr_SetString(PyExc_TypeError,
                     "Matrix(): "
                     "takes no keyword args");
     return NULL;
   }
 
   switch (PyTuple_GET_SIZE(args)) {
     case 0:
       return Matrix_CreatePyObject(NULL, 4, 4, type);
     case 1: {
       PyObject *arg = PyTuple_GET_ITEM(args, 0);
 
       /* Input is now as a sequence of rows so length of sequence
        * is the number of rows */
       /* -1 is an error, size checks will account for this */
       const ushort num_row = PySequence_Size(arg);
 
       if (num_row >= 2 && num_row <= 4) {
         PyObject *item = PySequence_GetItem(arg, 0);
         /* Since each item is a row, number of items is the
          * same as the number of columns */
         const ushort num_col = PySequence_Size(item);
         Py_XDECREF(item);
 
         if (num_col >= 2 && num_col <= 4) {
           /* sane row & col size, new matrix and assign as slice  */
           PyObject *matrix = Matrix_CreatePyObject(NULL, num_col, num_row, type);
           if (Matrix_ass_slice((MatrixObject *)matrix, 0, INT_MAX, arg) == 0) {
             return matrix;
           }
           else { /* matrix ok, slice assignment not */
             Py_DECREF(matrix);
           }
         }
       }
       break;
     }
   }
 
   /* will overwrite error */
   PyErr_SetString(PyExc_TypeError,
                   "Matrix(): "
                   "expects no args or a single arg containing 2-4 numeric sequences");
   return NULL;
 }
 
-static PyObject *matrix__apply_to_copy(PyNoArgsFunction matrix_func, MatrixObject *self)
+static PyObject *matrix__apply_to_copy(PyObject *(*matrix_func)(MatrixObject *),
+                                       MatrixObject *self)
 {
   PyObject *ret = Matrix_copy(self);
   if (ret) {
-    PyObject *ret_dummy = matrix_func(ret);
+    PyObject *ret_dummy = matrix_func((MatrixObject *)ret);
     if (ret_dummy) {
       Py_DECREF(ret_dummy);
-      return (PyObject *)ret;
+      return ret;
     }
     else { /* error */
       Py_DECREF(ret);
       return NULL;
     }
   }
   else {
     /* copy may fail if the read callback errors out */
     return NULL;
   }
 }
 
 /* when a matrix is 4x4 size but initialized as a 3x3, re-assign values for 4x4 */
 static void matrix_3x3_as_4x4(float mat[16])
 {
   mat[10] = mat[8];
   mat[9] = mat[7];
   mat[8] = mat[6];
   mat[7] = 0.0f;
   mat[6] = mat[5];
   mat[5] = mat[4];
   mat[4] = mat[3];
   mat[3] = 0.0f;
 }
 
 /*-----------------------CLASS-METHODS----------------------------*/
 
 /* mat is a 1D array of floats - row[0][0], row[0][1], row[1][0], etc. */
 PyDoc_STRVAR(C_Matrix_Identity_doc,
              ".. classmethod:: Identity(size)\n"
              "\n"
              "   Create an identity matrix.\n"
              "\n"
              "   :arg size: The size of the identity matrix to construct [2, 4].\n"
              "   :type size: int\n"
              "   :return: A new identity matrix.\n"
              "   :rtype: :class:`Matrix`\n");
 static PyObject *C_Matrix_Identity(PyObject *cls, PyObject *args)
 {
   int matSize;
 
   if (!PyArg_ParseTuple(args, "i:Matrix.Identity", &matSize)) {
     return NULL;
   }
 
   if (matSize < 2 || matSize > 4) {
     PyErr_SetString(PyExc_RuntimeError,
                     "Matrix.Identity(): "
                     "size must be between 2 and 4");
     return NULL;
   }
 
   return Matrix_CreatePyObject(NULL, matSize, matSize, (PyTypeObject *)cls);
 }
 
 PyDoc_STRVAR(C_Matrix_Rotation_doc,
              ".. classmethod:: Rotation(angle, size, axis)\n"
              "\n"
              "   Create a matrix representing a rotation.\n"
              "\n"
              "   :arg angle: The angle of rotation desired, in radians.\n"
              "   :type angle: float\n"
              "   :arg size: The size of the rotation matrix to construct [2, 4].\n"
              "   :type size: int\n"
              "   :arg axis: a string in ['X', 'Y', 'Z'] or a 3D Vector Object\n"
              "      (optional when size is 2).\n"
              "   :type axis: string or :class:`Vector`\n"
              "   :return: A new rotation matrix.\n"
              "   :rtype: :class:`Matrix`\n");
 static PyObject *C_Matrix_Rotation(PyObject *cls, PyObject *args)
 {
   PyObject *vec = NULL;
   const char *axis = NULL;
   int matSize;
   double angle; /* use double because of precision problems at high values */
   float mat[16] = {
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       1.0f,
   };
 
   if (!PyArg_ParseTuple(args, "di|O:Matrix.Rotation", &angle, &matSize, &vec)) {
     return NULL;
   }
 
   if (vec && PyUnicode_Check(vec)) {
     axis = _PyUnicode_AsString((PyObject *)vec);
     if (axis == NULL || axis[0] == '\0' || axis[1] != '\0' || axis[0] < 'X' || axis[0] > 'Z') {
       PyErr_SetString(PyExc_ValueError,
                       "Matrix.Rotation(): "
                       "3rd argument axis value must be a 3D vector "
                       "or a string in 'X', 'Y', 'Z'");
       return NULL;
     }
     else {
       /* use the string */
       vec = NULL;
     }
   }
 
   angle = angle_wrap_rad(angle);
 
   if (matSize != 2 && matSize != 3 && matSize != 4) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.Rotation(): "
                     "can only return a 2x2 3x3 or 4x4 matrix");
     return NULL;
   }
   if (matSize == 2 && (vec != NULL)) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.Rotation(): "
                     "cannot create a 2x2 rotation matrix around arbitrary axis");
     return NULL;
   }
   if ((matSize == 3 || matSize == 4) && (axis == NULL) && (vec == NULL)) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.Rotation(): "
                     "axis of rotation for 3d and 4d matrices is required");
     return NULL;
   }
 
   /* check for valid vector/axis above */
   if (vec) {
     float tvec[3];
 
     if (mathutils_array_parse(
             tvec, 3, 3, vec, "Matrix.Rotation(angle, size, axis), invalid 'axis' arg") == -1) {
       return NULL;
     }
 
     axis_angle_to_mat3((float(*)[3])mat, tvec, angle);
   }
   else if (matSize == 2) {
     angle_to_mat2((float(*)[2])mat, angle);
   }
   else {
     /* valid axis checked above */
     axis_angle_to_mat3_single((float(*)[3])mat, axis[0], angle);
   }
 
   if (matSize == 4) {
     matrix_3x3_as_4x4(mat);
   }
   /* pass to matrix creation */
   return Matrix_CreatePyObject(mat, matSize, matSize, (PyTypeObject *)cls);
 }
 
 PyDoc_STRVAR(C_Matrix_Translation_doc,
              ".. classmethod:: Translation(vector)\n"
              "\n"
              "   Create a matrix representing a translation.\n"
              "\n"
              "   :arg vector: The translation vector.\n"
              "   :type vector: :class:`Vector`\n"
              "   :return: An identity matrix with a translation.\n"
              "   :rtype: :class:`Matrix`\n");
 static PyObject *C_Matrix_Translation(PyObject *cls, PyObject *value)
 {
   float mat[4][4];
 
   unit_m4(mat);
 
   if (mathutils_array_parse(
           mat[3], 3, 4, value, "mathutils.Matrix.Translation(vector), invalid vector arg") == -1) {
     return NULL;
   }
 
   return Matrix_CreatePyObject(&mat[0][0], 4, 4, (PyTypeObject *)cls);
 }
 /* ----------------------------------mathutils.Matrix.Diagonal() ------------- */
 PyDoc_STRVAR(C_Matrix_Diagonal_doc,
              ".. classmethod:: Diagonal(vector)\n"
              "\n"
              "   Create a diagonal (scaling) matrix using the values from the vector.\n"
              "\n"
              "   :arg vector: The vector of values for the diagonal.\n"
              "   :type vector: :class:`Vector`\n"
              "   :return: A diagonal matrix.\n"
              "   :rtype: :class:`Matrix`\n");
 static PyObject *C_Matrix_Diagonal(PyObject *cls, PyObject *value)
 {
   float mat[16] = {0.0f};
   float vec[4];
 
   int size = mathutils_array_parse(
       vec, 2, 4, value, "mathutils.Matrix.Diagonal(vector), invalid vector arg");
 
   if (size == -1) {
     return NULL;
   }
 
   for (int i = 0; i < size; i++) {
     mat[size * i + i] = vec[i];
   }
 
   return Matrix_CreatePyObject(mat, size, size, (PyTypeObject *)cls);
 }
 /* ----------------------------------mathutils.Matrix.Scale() ------------- */
 /* mat is a 1D array of floats - row[0][0], row[0][1], row[1][0], etc. */
 PyDoc_STRVAR(C_Matrix_Scale_doc,
              ".. classmethod:: Scale(factor, size, axis)\n"
              "\n"
              "   Create a matrix representing a scaling.\n"
              "\n"
              "   :arg factor: The factor of scaling to apply.\n"
              "   :type factor: float\n"
              "   :arg size: The size of the scale matrix to construct [2, 4].\n"
              "   :type size: int\n"
              "   :arg axis: Direction to influence scale. (optional).\n"
              "   :type axis: :class:`Vector`\n"
              "   :return: A new scale matrix.\n"
              "   :rtype: :class:`Matrix`\n");
 static PyObject *C_Matrix_Scale(PyObject *cls, PyObject *args)
 {
   PyObject *vec = NULL;
   int vec_size;
   float tvec[3];
   float factor;
   int matSize;
   float mat[16] = {
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       1.0f,
   };
 
   if (!PyArg_ParseTuple(args, "fi|O:Matrix.Scale", &factor, &matSize, &vec)) {
     return NULL;
   }
   if (matSize != 2 && matSize != 3 && matSize != 4) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.Scale(): "
                     "can only return a 2x2 3x3 or 4x4 matrix");
     return NULL;
   }
   if (vec) {
     vec_size = (matSize == 2 ? 2 : 3);
     if (mathutils_array_parse(tvec,
                               vec_size,
                               vec_size,
                               vec,
                               "Matrix.Scale(factor, size, axis), invalid 'axis' arg") == -1) {
       return NULL;
     }
   }
   if (vec == NULL) { /* scaling along axis */
     if (matSize == 2) {
       mat[0] = factor;
       mat[3] = factor;
     }
     else {
       mat[0] = factor;
       mat[4] = factor;
       mat[8] = factor;
     }
   }
   else {
     /* scaling in arbitrary direction
      * normalize arbitrary axis */
     float norm = 0.0f;
     int x;
     for (x = 0; x < vec_size; x++) {
       norm += tvec[x] * tvec[x];
     }
     norm = sqrtf(norm);
     for (x = 0; x < vec_size; x++) {
       tvec[x] /= norm;
     }
     if (matSize == 2) {
       mat[0] = 1 + ((factor - 1) * (tvec[0] * tvec[0]));
       mat[1] = ((factor - 1) * (tvec[0] * tvec[1]));
       mat[2] = ((factor - 1) * (tvec[0] * tvec[1]));
       mat[3] = 1 + ((factor - 1) * (tvec[1] * tvec[1]));
     }
     else {
       mat[0] = 1 + ((factor - 1) * (tvec[0] * tvec[0]));
       mat[1] = ((factor - 1) * (tvec[0] * tvec[1]));
       mat[2] = ((factor - 1) * (tvec[0] * tvec[2]));
       mat[3] = ((factor - 1) * (tvec[0] * tvec[1]));
       mat[4] = 1 + ((factor - 1) * (tvec[1] * tvec[1]));
       mat[5] = ((factor - 1) * (tvec[1] * tvec[2]));
       mat[6] = ((factor - 1) * (tvec[0] * tvec[2]));
       mat[7] = ((factor - 1) * (tvec[1] * tvec[2]));
       mat[8] = 1 + ((factor - 1) * (tvec[2] * tvec[2]));
     }
   }
   if (matSize == 4) {
     matrix_3x3_as_4x4(mat);
   }
   /* pass to matrix creation */
   return Matrix_CreatePyObject(mat, matSize, matSize, (PyTypeObject *)cls);
 }
 /* ----------------------------------mathutils.Matrix.OrthoProjection() --- */
 /* mat is a 1D array of floats - row[0][0], row[0][1], row[1][0], etc. */
 PyDoc_STRVAR(C_Matrix_OrthoProjection_doc,
              ".. classmethod:: OrthoProjection(axis, size)\n"
              "\n"
              "   Create a matrix to represent an orthographic projection.\n"
              "\n"
              "   :arg axis: Can be any of the following: ['X', 'Y', 'XY', 'XZ', 'YZ'],\n"
              "      where a single axis is for a 2D matrix.\n"
              "      Or a vector for an arbitrary axis\n"
              "   :type axis: string or :class:`Vector`\n"
              "   :arg size: The size of the projection matrix to construct [2, 4].\n"
              "   :type size: int\n"
              "   :return: A new projection matrix.\n"
              "   :rtype: :class:`Matrix`\n");
 static PyObject *C_Matrix_OrthoProjection(PyObject *cls, PyObject *args)
 {
   PyObject *axis;
 
   int matSize, x;
   float norm = 0.0f;
   float mat[16] = {
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       1.0f,
   };
 
   if (!PyArg_ParseTuple(args, "Oi:Matrix.OrthoProjection", &axis, &matSize)) {
     return NULL;
   }
   if (matSize != 2 && matSize != 3 && matSize != 4) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.OrthoProjection(): "
                     "can only return a 2x2 3x3 or 4x4 matrix");
     return NULL;
   }
 
   if (PyUnicode_Check(axis)) { /* ortho projection onto cardinal plane */
     Py_ssize_t plane_len;
     const char *plane = _PyUnicode_AsStringAndSize(axis, &plane_len);
     if (matSize == 2) {
       if (plane_len == 1 && plane[0] == 'X') {
         mat[0] = 1.0f;
       }
       else if (plane_len == 1 && plane[0] == 'Y') {
         mat[3] = 1.0f;
       }
       else {
         PyErr_Format(PyExc_ValueError,
                      "Matrix.OrthoProjection(): "
                      "unknown plane, expected: X, Y, not '%.200s'",
                      plane);
         return NULL;
       }
     }
     else {
       if (plane_len == 2 && plane[0] == 'X' && plane[1] == 'Y') {
         mat[0] = 1.0f;
         mat[4] = 1.0f;
       }
       else if (plane_len == 2 && plane[0] == 'X' && plane[1] == 'Z') {
         mat[0] = 1.0f;
         mat[8] = 1.0f;
       }
       else if (plane_len == 2 && plane[0] == 'Y' && plane[1] == 'Z') {
         mat[4] = 1.0f;
         mat[8] = 1.0f;
       }
       else {
         PyErr_Format(PyExc_ValueError,
                      "Matrix.OrthoProjection(): "
                      "unknown plane, expected: XY, XZ, YZ, not '%.200s'",
                      plane);
         return NULL;
       }
     }
   }
   else {
     /* arbitrary plane */
 
     int vec_size = (matSize == 2 ? 2 : 3);
     float tvec[4];
 
     if (mathutils_array_parse(tvec,
                               vec_size,
                               vec_size,
                               axis,
                               "Matrix.OrthoProjection(axis, size), invalid 'axis' arg") == -1) {
       return NULL;
     }
 
     /* normalize arbitrary axis */
     for (x = 0; x < vec_size; x++) {
       norm += tvec[x] * tvec[x];
     }
     norm = sqrtf(norm);
     for (x = 0; x < vec_size; x++) {
       tvec[x] /= norm;
     }
     if (matSize == 2) {
       mat[0] = 1 - (tvec[0] * tvec[0]);
       mat[1] = -(tvec[0] * tvec[1]);
       mat[2] = -(tvec[0] * tvec[1]);
       mat[3] = 1 - (tvec[1] * tvec[1]);
     }
     else if (matSize > 2) {
       mat[0] = 1 - (tvec[0] * tvec[0]);
       mat[1] = -(tvec[0] * tvec[1]);
       mat[2] = -(tvec[0] * tvec[2]);
       mat[3] = -(tvec[0] * tvec[1]);
       mat[4] = 1 - (tvec[1] * tvec[1]);
       mat[5] = -(tvec[1] * tvec[2]);
       mat[6] = -(tvec[0] * tvec[2]);
       mat[7] = -(tvec[1] * tvec[2]);
       mat[8] = 1 - (tvec[2] * tvec[2]);
     }
   }
   if (matSize == 4) {
     matrix_3x3_as_4x4(mat);
   }
   /* pass to matrix creation */
   return Matrix_CreatePyObject(mat, matSize, matSize, (PyTypeObject *)cls);
 }
 
 PyDoc_STRVAR(C_Matrix_Shear_doc,
              ".. classmethod:: Shear(plane, size, factor)\n"
              "\n"
              "   Create a matrix to represent an shear transformation.\n"
              "\n"
              "   :arg plane: Can be any of the following: ['X', 'Y', 'XY', 'XZ', 'YZ'],\n"
              "      where a single axis is for a 2D matrix only.\n"
              "   :type plane: string\n"
              "   :arg size: The size of the shear matrix to construct [2, 4].\n"
              "   :type size: int\n"
              "   :arg factor: The factor of shear to apply. For a 3 or 4 *size* matrix\n"
              "      pass a pair of floats corresponding with the *plane* axis.\n"
              "   :type factor: float or float pair\n"
              "   :return: A new shear matrix.\n"
              "   :rtype: :class:`Matrix`\n");
 static PyObject *C_Matrix_Shear(PyObject *cls, PyObject *args)
 {
   int matSize;
   const char *plane;
   PyObject *fac;
   float mat[16] = {
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       0.0f,
       1.0f,
   };
 
   if (!PyArg_ParseTuple(args, "siO:Matrix.Shear", &plane, &matSize, &fac)) {
     return NULL;
   }
   if (matSize != 2 && matSize != 3 && matSize != 4) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.Shear(): "
                     "can only return a 2x2 3x3 or 4x4 matrix");
     return NULL;
   }
 
   if (matSize == 2) {
     float const factor = PyFloat_AsDouble(fac);
 
     if (factor == -1.0f && PyErr_Occurred()) {
       PyErr_SetString(PyExc_TypeError,
                       "Matrix.Shear(): "
                       "the factor to be a float");
       return NULL;
     }
 
     /* unit */
     mat[0] = 1.0f;
     mat[3] = 1.0f;
 
     if (STREQ(plane, "X")) {
       mat[2] = factor;
     }
     else if (STREQ(plane, "Y")) {
       mat[1] = factor;
     }
     else {
       PyErr_SetString(PyExc_ValueError,
                       "Matrix.Shear(): "
                       "expected: X, Y or wrong matrix size for shearing plane");
       return NULL;
     }
   }
   else {
     /* 3 or 4, apply as 3x3, resize later if needed */
     float factor[2];
 
     if (mathutils_array_parse(factor, 2, 2, fac, "Matrix.Shear()") == -1) {
       return NULL;
     }
 
     /* unit */
     mat[0] = 1.0f;
     mat[4] = 1.0f;
     mat[8] = 1.0f;
 
     if (STREQ(plane, "XY")) {
       mat[6] = factor[0];
       mat[7] = factor[1];
     }
     else if (STREQ(plane, "XZ")) {
       mat[3] = factor[0];
       mat[5] = factor[1];
     }
     else if (STREQ(plane, "YZ")) {
       mat[1] = factor[0];
       mat[2] = factor[1];
     }
     else {
       PyErr_SetString(PyExc_ValueError,
                       "Matrix.Shear(): "
                       "expected: X, Y, XY, XZ, YZ");
       return NULL;
     }
   }
 
   if (matSize == 4) {
     matrix_3x3_as_4x4(mat);
   }
   /* pass to matrix creation */
   return Matrix_CreatePyObject(mat, matSize, matSize, (PyTypeObject *)cls);
 }
 
 void matrix_as_3x3(float mat[3][3], MatrixObject *self)
 {
   copy_v3_v3(mat[0], MATRIX_COL_PTR(self, 0));
   copy_v3_v3(mat[1], MATRIX_COL_PTR(self, 1));
   copy_v3_v3(mat[2], MATRIX_COL_PTR(self, 2));
 }
 
 static void matrix_copy(MatrixObject *mat_dst, const MatrixObject *mat_src)
 {
   BLI_assert((mat_dst->num_col == mat_src->num_col) && (mat_dst->num_row == mat_src->num_row));
   BLI_assert(mat_dst != mat_src);
 
   memcpy(mat_dst->matrix, mat_src->matrix, sizeof(float) * (mat_dst->num_col * mat_dst->num_row));
 }
 
 static void matrix_unit_internal(MatrixObject *self)
 {
   const int mat_size = sizeof(float) * (self->num_col * self->num_row);
   memset(self->matrix, 0x0, mat_size);
   const int col_row_max = min_ii(self->num_col, self->num_row);
   const int num_row = self->num_row;
   for (int col = 0; col < col_row_max; col++) {
     self->matrix[(col * num_row) + col] = 1.0f;
   }
 }
 
 /* transposes memory layout, rol/col's don't have to match */
 static void matrix_transpose_internal(float mat_dst_fl[], const MatrixObject *mat_src)
 {
   ushort col, row;
   uint i = 0;
 
   for (row = 0; row < mat_src->num_row; row++) {
     for (col = 0; col < mat_src->num_col; col++) {
       mat_dst_fl[i++] = MATRIX_ITEM(mat_src, row, col);
     }
   }
 }
 
 /* assumes rowsize == colsize is checked and the read callback has run */
 static float matrix_determinant_internal(const MatrixObject *self)
 {
   if (self->num_col == 2) {
     return determinant_m2(MATRIX_ITEM(self, 0, 0),
                           MATRIX_ITEM(self, 0, 1),
                           MATRIX_ITEM(self, 1, 0),
                           MATRIX_ITEM(self, 1, 1));
   }
   else if (self->num_col == 3) {
     return determinant_m3(MATRIX_ITEM(self, 0, 0),
                           MATRIX_ITEM(self, 0, 1),
                           MATRIX_ITEM(self, 0, 2),
                           MATRIX_ITEM(self, 1, 0),
                           MATRIX_ITEM(self, 1, 1),
                           MATRIX_ITEM(self, 1, 2),
                           MATRIX_ITEM(self, 2, 0),
                           MATRIX_ITEM(self, 2, 1),
                           MATRIX_ITEM(self, 2, 2));
   }
   else {
     return determinant_m4((float(*)[4])self->matrix);
   }
 }
 
 static void adjoint_matrix_n(float *mat_dst, const float *mat_src, const ushort dim)
 {
   /* calculate the classical adjoint */
   switch (dim) {
     case 2: {
       adjoint_m2_m2((float(*)[2])mat_dst, (float(*)[2])mat_src);
       break;
     }
     case 3: {
       adjoint_m3_m3((float(*)[3])mat_dst, (float(*)[3])mat_src);
       break;
     }
     case 4: {
       adjoint_m4_m4((float(*)[4])mat_dst, (float(*)[4])mat_src);
       break;
     }
     default:
       BLI_assert(0);
   }
 }
 
 static void matrix_invert_with_det_n_internal(float *mat_dst,
                                               const float *mat_src,
                                               const float det,
                                               const ushort dim)
 {
   float mat[MATRIX_MAX_DIM * MATRIX_MAX_DIM];
   ushort i, j, k;
 
   BLI_assert(det != 0.0f);
 
   adjoint_matrix_n(mat, mat_src, dim);
 
   /* divide by determinant & set values */
   k = 0;
   for (i = 0; i < dim; i++) {   /* num_col */
     for (j = 0; j < dim; j++) { /* num_row */
       mat_dst[MATRIX_ITEM_INDEX_NUMROW(dim, j, i)] = mat[k++] / det;
     }
   }
 }
 
 /**
  * \param r_mat: can be from ``self->matrix`` or not.
  */
 static bool matrix_invert_internal(const MatrixObject *self, float *r_mat)
 {
   float det;
   BLI_assert(self->num_col == self->num_row);
   det = matrix_determinant_internal(self);
 
   if (det != 0.0f) {
     matrix_invert_with_det_n_internal(r_mat, self->matrix, det, self->num_col);
     return true;
   }
   else {
     return false;
   }
 }
 
 /**
  * Similar to ``matrix_invert_internal`` but should never error.
  * \param r_mat: can be from ``self->matrix`` or not.
  */
 static void matrix_invert_safe_internal(const MatrixObject *self, float *r_mat)
 {
   float det;
   float *in_mat = self->matrix;
   BLI_assert(self->num_col == self->num_row);
   det = matrix_determinant_internal(self);
 
   if (det == 0.0f) {
     const float eps = PSEUDOINVERSE_EPSILON;
 
     /* We will copy self->matrix into r_mat (if needed),
      * and modify it in place to add diagonal epsilon. */
     in_mat = r_mat;
 
     switch (self->num_col) {
       case 2: {
         float(*mat)[2] = (float(*)[2])in_mat;
 
         if (in_mat != self->matrix) {
           copy_m2_m2(mat, (float(*)[2])self->matrix);
         }
         mat[0][0] += eps;
         mat[1][1] += eps;
 
         if (UNLIKELY((det = determinant_m2(mat[0][0], mat[0][1], mat[1][0], mat[1][1])) == 0.0f)) {
           unit_m2(mat);
           det = 1.0f;
         }
         break;
       }
       case 3: {
         float(*mat)[3] = (float(*)[3])in_mat;
 
         if (in_mat != self->matrix) {
           copy_m3_m3(mat, (float(*)[3])self->matrix);
         }
         mat[0][0] += eps;
         mat[1][1] += eps;
         mat[2][2] += eps;
 
         if (UNLIKELY((det = determinant_m3_array(mat)) == 0.0f)) {
           unit_m3(mat);
           det = 1.0f;
         }
         break;
       }
       case 4: {
         float(*mat)[4] = (float(*)[4])in_mat;
 
         if (in_mat != self->matrix) {
           copy_m4_m4(mat, (float(*)[4])self->matrix);
         }
         mat[0][0] += eps;
         mat[1][1] += eps;
         mat[2][2] += eps;
         mat[3][3] += eps;
 
         if (UNLIKELY(det = determinant_m4(mat)) == 0.0f) {
           unit_m4(mat);
           det = 1.0f;
         }
         break;
       }
       default:
         BLI_assert(0);
     }
   }
 
   matrix_invert_with_det_n_internal(r_mat, in_mat, det, self->num_col);
 }
 
 /*-----------------------------METHODS----------------------------*/
 PyDoc_STRVAR(Matrix_to_quaternion_doc,
              ".. method:: to_quaternion()\n"
              "\n"
              "   Return a quaternion representation of the rotation matrix.\n"
              "\n"
              "   :return: Quaternion representation of the rotation matrix.\n"
              "   :rtype: :class:`Quaternion`\n");
 static PyObject *Matrix_to_quaternion(MatrixObject *self)
 {
   float quat[4];
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   /* must be 3-4 cols, 3-4 rows, square matrix */
   if ((self->num_row < 3) || (self->num_col < 3) || (self->num_row != self->num_col)) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.to_quat(): "
                     "inappropriate matrix size - expects 3x3 or 4x4 matrix");
     return NULL;
   }
   if (self->num_row == 3) {
     mat3_to_quat(quat, (float(*)[3])self->matrix);
   }
   else {
     mat4_to_quat(quat, (float(*)[4])self->matrix);
   }
 
   return Quaternion_CreatePyObject(quat, NULL);
 }
 
 /*---------------------------matrix.toEuler() --------------------*/
 PyDoc_STRVAR(Matrix_to_euler_doc,
              ".. method:: to_euler(order, euler_compat)\n"
              "\n"
              "   Return an Euler representation of the rotation matrix\n"
              "   (3x3 or 4x4 matrix only).\n"
              "\n"
              "   :arg order: Optional rotation order argument in\n"
              "      ['XYZ', 'XZY', 'YXZ', 'YZX', 'ZXY', 'ZYX'].\n"
              "   :type order: string\n"
              "   :arg euler_compat: Optional euler argument the new euler will be made\n"
              "      compatible with (no axis flipping between them).\n"
              "      Useful for converting a series of matrices to animation curves.\n"
              "   :type euler_compat: :class:`Euler`\n"
              "   :return: Euler representation of the matrix.\n"
              "   :rtype: :class:`Euler`\n");
 static PyObject *Matrix_to_euler(MatrixObject *self, PyObject *args)
 {
   const char *order_str = NULL;
   short order = EULER_ORDER_XYZ;
   float eul[3], eul_compatf[3];
   EulerObject *eul_compat = NULL;
 
   float mat[3][3];
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if (!PyArg_ParseTuple(args, "|sO!:to_euler", &order_str, &euler_Type, &eul_compat)) {
     return NULL;
   }
 
   if (eul_compat) {
     if (BaseMath_ReadCallback(eul_compat) == -1) {
       return NULL;
     }
 
     copy_v3_v3(eul_compatf, eul_compat->eul);
   }
 
   /*must be 3-4 cols, 3-4 rows, square matrix */
   if (self->num_row == 3 && self->num_col == 3) {
     copy_m3_m3(mat, (float(*)[3])self->matrix);
   }
   else if (self->num_row == 4 && self->num_col == 4) {
     copy_m3_m4(mat, (float(*)[4])self->matrix);
   }
   else {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.to_euler(): "
                     "inappropriate matrix size - expects 3x3 or 4x4 matrix");
     return NULL;
   }
 
   if (order_str) {
     order = euler_order_from_string(order_str, "Matrix.to_euler()");
 
     if (order == -1) {
       return NULL;
     }
   }
 
   normalize_m3(mat);
 
   if (eul_compat) {
     if (order == 1) {
       mat3_normalized_to_compatible_eul(eul, eul_compatf, mat);
     }
     else {
       mat3_normalized_to_compatible_eulO(eul, eul_compatf, order, mat);
     }
   }
   else {
     if (order == 1) {
       mat3_normalized_to_eul(eul, mat);
     }
     else {
       mat3_normalized_to_eulO(eul, order, mat);
     }
   }
 
   return Euler_CreatePyObject(eul, order, NULL);
 }
 
 PyDoc_STRVAR(Matrix_resize_4x4_doc,
              ".. method:: resize_4x4()\n"
              "\n"
              "   Resize the matrix to 4x4.\n");
 static PyObject *Matrix_resize_4x4(MatrixObject *self)
 {
   float mat[4][4];
   int col;
 
   if (self->flag & BASE_MATH_FLAG_IS_WRAP) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.resize_4x4(): "
                     "cannot resize wrapped data - make a copy and resize that");
     return NULL;
   }
   if (self->cb_user) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.resize_4x4(): "
                     "cannot resize owned data - make a copy and resize that");
     return NULL;
   }
 
   self->matrix = PyMem_Realloc(self->matrix, (sizeof(float) * (MATRIX_MAX_DIM * MATRIX_MAX_DIM)));
   if (self->matrix == NULL) {
     PyErr_SetString(PyExc_MemoryError,
                     "Matrix.resize_4x4(): "
                     "problem allocating pointer space");
     return NULL;
   }
 
   unit_m4(mat);
 
   for (col = 0; col < self->num_col; col++) {
     memcpy(mat[col], MATRIX_COL_PTR(self, col), self->num_row * sizeof(float));
   }
 
   copy_m4_m4((float(*)[4])self->matrix, (float(*)[4])mat);
 
   self->num_col = 4;
   self->num_row = 4;
 
   Py_RETURN_NONE;
 }
 
 static PyObject *Matrix_to_NxN(MatrixObject *self, const int num_col, const int num_row)
 {
   const int mat_size = sizeof(float) * (num_col * num_row);
   MatrixObject *pymat = (MatrixObject *)Matrix_CreatePyObject_alloc(
       PyMem_Malloc(mat_size), num_col, num_row, Py_TYPE(self));
 
   if ((self->num_row == num_row) && (self->num_col == num_col)) {
     memcpy(pymat->matrix, self->matrix, mat_size);
   }
   else {
     if ((self->num_col < num_col) || (self->num_row < num_row)) {
       matrix_unit_internal(pymat);
     }
     const int col_len_src = min_ii(num_col, self->num_col);
     const int row_len_src = min_ii(num_row, self->num_row);
     for (int col = 0; col < col_len_src; col++) {
       memcpy(
           &pymat->matrix[col * num_row], MATRIX_COL_PTR(self, col), sizeof(float) * row_len_src);
     }
   }
   return (PyObject *)pymat;
 }
 
 PyDoc_STRVAR(Matrix_to_2x2_doc,
              ".. method:: to_2x2()\n"
              "\n"
              "   Return a 2x2 copy of this matrix.\n"
              "\n"
              "   :return: a new matrix.\n"
              "   :rtype: :class:`Matrix`\n");
 static PyObject *Matrix_to_2x2(MatrixObject *self)
 {
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
   return Matrix_to_NxN(self, 2, 2);
 }
 
 PyDoc_STRVAR(Matrix_to_3x3_doc,
              ".. method:: to_3x3()\n"
              "\n"
              "   Return a 3x3 copy of this matrix.\n"
              "\n"
              "   :return: a new matrix.\n"
              "   :rtype: :class:`Matrix`\n");
 static PyObject *Matrix_to_3x3(MatrixObject *self)
 {
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
   return Matrix_to_NxN(self, 3, 3);
 }
 
 PyDoc_STRVAR(Matrix_to_4x4_doc,
              ".. method:: to_4x4()\n"
              "\n"
              "   Return a 4x4 copy of this matrix.\n"
              "\n"
              "   :return: a new matrix.\n"
              "   :rtype: :class:`Matrix`\n");
 static PyObject *Matrix_to_4x4(MatrixObject *self)
 {
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
   return Matrix_to_NxN(self, 4, 4);
 }
 
 PyDoc_STRVAR(Matrix_to_translation_doc,
              ".. method:: to_translation()\n"
              "\n"
              "   Return the translation part of a 4 row matrix.\n"
              "\n"
              "   :return: Return the translation of a matrix.\n"
              "   :rtype: :class:`Vector`\n");
 static PyObject *Matrix_to_translation(MatrixObject *self)
 {
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if ((self->num_row < 3) || self->num_col < 4) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.to_translation(): "
                     "inappropriate matrix size");
     return NULL;
   }
 
   return Vector_CreatePyObject(MATRIX_COL_PTR(self, 3), 3, NULL);
 }
 
 PyDoc_STRVAR(Matrix_to_scale_doc,
              ".. method:: to_scale()\n"
              "\n"
              "   Return the scale part of a 3x3 or 4x4 matrix.\n"
              "\n"
              "   :return: Return the scale of a matrix.\n"
              "   :rtype: :class:`Vector`\n"
              "\n"
              "   .. note:: This method does not return a negative scale on any axis because it is "
              "not possible to obtain this data from the matrix alone.\n");
 static PyObject *Matrix_to_scale(MatrixObject *self)
 {
   float rot[3][3];
   float mat[3][3];
   float size[3];
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   /*must be 3-4 cols, 3-4 rows, square matrix */
   if ((self->num_row < 3) || (self->num_col < 3)) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.to_scale(): "
                     "inappropriate matrix size, 3x3 minimum size");
     return NULL;
   }
 
   matrix_as_3x3(mat, self);
 
   /* compatible mat4_to_loc_rot_size */
   mat3_to_rot_size(rot, size, mat);
 
   return Vector_CreatePyObject(size, 3, NULL);
 }
 
 /*---------------------------matrix.invert() ---------------------*/
 
 /* re-usable checks for invert */
 static bool matrix_invert_is_compat(const MatrixObject *self)
 {
   if (self->num_col != self->num_row) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.invert(ed): "
                     "only square matrices are supported");
     return false;
   }
   else {
     return true;
   }
 }
 
 static bool matrix_invert_args_check(const MatrixObject *self, PyObject *args, bool check_type)
 {
   switch (PyTuple_GET_SIZE(args)) {
     case 0:
       return true;
     case 1:
       if (check_type) {
         const MatrixObject *fallback = (MatrixObject *)PyTuple_GET_ITEM(args, 0);
         if (!MatrixObject_Check(fallback)) {
           PyErr_SetString(PyExc_TypeError,
                           "Matrix.invert: "
                           "expects a matrix argument or nothing");
           return false;
         }
 
         if ((self->num_col != fallback->num_col) || (self->num_row != fallback->num_row)) {
           PyErr_SetString(PyExc_TypeError,
                           "Matrix.invert: "
                           "matrix argument has different dimensions");
           return false;
         }
       }
 
       return true;
     default:
       PyErr_SetString(PyExc_ValueError,
                       "Matrix.invert(ed): "
                       "takes at most one argument");
       return false;
   }
 }
 
 static void matrix_invert_raise_degenerate(void)
 {
   PyErr_SetString(PyExc_ValueError,
                   "Matrix.invert(ed): "
                   "matrix does not have an inverse");
 }
 
 PyDoc_STRVAR(
     Matrix_invert_doc,
     ".. method:: invert(fallback=None)\n"
     "\n"
     "   Set the matrix to its inverse.\n"
     "\n"
     "   :arg fallback: Set the matrix to this value when the inverse cannot be calculated\n"
     "      (instead of raising a :exc:`ValueError` exception).\n"
     "   :type fallback: :class:`Matrix`\n"
     "\n"
     "   .. seealso:: `Inverse matrix <https://en.wikipedia.org/wiki/Inverse_matrix>`__ on "
     "Wikipedia.\n");
 static PyObject *Matrix_invert(MatrixObject *self, PyObject *args)
 {
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return NULL;
   }
 
   if (matrix_invert_is_compat(self) == false) {
     return NULL;
   }
 
   if (matrix_invert_args_check(self, args, true) == false) {
     return NULL;
   }
 
   if (matrix_invert_internal(self, self->matrix)) {
     /* pass */
   }
   else {
     if (PyTuple_GET_SIZE(args) == 1) {
       MatrixObject *fallback = (MatrixObject *)PyTuple_GET_ITEM(args, 0);
 
       if (BaseMath_ReadCallback(fallback) == -1) {
         return NULL;
       }
 
       if (self != fallback) {
         matrix_copy(self, fallback);
       }
     }
     else {
       matrix_invert_raise_degenerate();
       return NULL;
     }
   }
 
   (void)BaseMath_WriteCallback(self);
   Py_RETURN_NONE;
 }
 
 PyDoc_STRVAR(Matrix_inverted_doc,
              ".. method:: inverted(fallback=None)\n"
              "\n"
              "   Return an inverted copy of the matrix.\n"
              "\n"
              "   :arg fallback: return this when the inverse can't be calculated\n"
              "      (instead of raising a :exc:`ValueError`).\n"
              "   :type fallback: any\n"
              "   :return: the inverted matrix or fallback when given.\n"
              "   :rtype: :class:`Matrix`\n");
 static PyObject *Matrix_inverted(MatrixObject *self, PyObject *args)
 {
   float mat[MATRIX_MAX_DIM * MATRIX_MAX_DIM];
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if (matrix_invert_args_check(self, args, false) == false) {
     return NULL;
   }
 
   if (matrix_invert_is_compat(self) == false) {
     return NULL;
   }
 
   if (matrix_invert_internal(self, mat)) {
     /* pass */
   }
   else {
     if (PyTuple_GET_SIZE(args) == 1) {
       PyObject *fallback = PyTuple_GET_ITEM(args, 0);
       Py_INCREF(fallback);
       return fallback;
     }
     else {
       matrix_invert_raise_degenerate();
       return NULL;
     }
   }
 
   return Matrix_copy_notest(self, mat);
 }
 
 static PyObject *Matrix_inverted_noargs(MatrixObject *self)
 {
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return NULL;
   }
 
   if (matrix_invert_is_compat(self) == false) {
     return NULL;
   }
 
   if (matrix_invert_internal(self, self->matrix)) {
     /* pass */
   }
   else {
     matrix_invert_raise_degenerate();
     return NULL;
   }
 
   (void)BaseMath_WriteCallback(self);
   Py_RETURN_NONE;
 }
 
 PyDoc_STRVAR(
     Matrix_invert_safe_doc,
     ".. method:: invert_safe()\n"
     "\n"
     "   Set the matrix to its inverse, will never error.\n"
     "   If degenerated (e.g. zero scale on an axis), add some epsilon to its diagonal, "
     "to get an invertible one.\n"
     "   If tweaked matrix is still degenerated, set to the identity matrix instead.\n"
     "\n"
     "   .. seealso:: `Inverse Matrix <https://en.wikipedia.org/wiki/Inverse_matrix>`__ on "
     "Wikipedia.\n");
 static PyObject *Matrix_invert_safe(MatrixObject *self)
 {
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return NULL;
   }
 
   if (matrix_invert_is_compat(self) == false) {
     return NULL;
   }
 
   matrix_invert_safe_internal(self, self->matrix);
 
   (void)BaseMath_WriteCallback(self);
   Py_RETURN_NONE;
 }
 
 PyDoc_STRVAR(Matrix_inverted_safe_doc,
              ".. method:: inverted_safe()\n"
              "\n"
              "   Return an inverted copy of the matrix, will never error.\n"
              "   If degenerated (e.g. zero scale on an axis), add some epsilon to its diagonal, "
              "to get an invertible one.\n"
              "   If tweaked matrix is still degenerated, return the identity matrix instead.\n"
              "\n"
              "   :return: the inverted matrix.\n"
              "   :rtype: :class:`Matrix`\n");
 static PyObject *Matrix_inverted_safe(MatrixObject *self)
 {
   float mat[MATRIX_MAX_DIM * MATRIX_MAX_DIM];
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if (matrix_invert_is_compat(self) == false) {
     return NULL;
   }
 
   matrix_invert_safe_internal(self, mat);
 
   return Matrix_copy_notest(self, mat);
 }
 
 /*---------------------------matrix.adjugate() ---------------------*/
 PyDoc_STRVAR(
     Matrix_adjugate_doc,
     ".. method:: adjugate()\n"
     "\n"
     "   Set the matrix to its adjugate.\n"
     "\n"
     "   .. note:: When the matrix cannot be adjugated a :exc:`ValueError` exception is raised.\n"
     "\n"
     "   .. seealso:: `Adjugate matrix <https://en.wikipedia.org/wiki/Adjugate_matrix>`__ on "
     "Wikipedia.\n");
 static PyObject *Matrix_adjugate(MatrixObject *self)
 {
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return NULL;
   }
 
   if (self->num_col != self->num_row) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.adjugate(d): "
                     "only square matrices are supported");
     return NULL;
   }
 
   /* calculate the classical adjoint */
   if (self->num_col <= 4) {
     adjoint_matrix_n(self->matrix, self->matrix, self->num_col);
   }
   else {
     PyErr_Format(
         PyExc_ValueError, "Matrix adjugate(d): size (%d) unsupported", (int)self->num_col);
     return NULL;
   }
 
   (void)BaseMath_WriteCallback(self);
   Py_RETURN_NONE;
 }
 
 PyDoc_STRVAR(
     Matrix_adjugated_doc,
     ".. method:: adjugated()\n"
     "\n"
     "   Return an adjugated copy of the matrix.\n"
     "\n"
     "   :return: the adjugated matrix.\n"
     "   :rtype: :class:`Matrix`\n"
     "\n"
     "   .. note:: When the matrix cant be adjugated a :exc:`ValueError` exception is raised.\n");
 static PyObject *Matrix_adjugated(MatrixObject *self)
 {
-  return matrix__apply_to_copy((PyNoArgsFunction)Matrix_adjugate, self);
+  return matrix__apply_to_copy(Matrix_adjugate, self);
 }
 
 PyDoc_STRVAR(
     Matrix_rotate_doc,
     ".. method:: rotate(other)\n"
     "\n"
     "   Rotates the matrix by another mathutils value.\n"
     "\n"
     "   :arg other: rotation component of mathutils value\n"
     "   :type other: :class:`Euler`, :class:`Quaternion` or :class:`Matrix`\n"
     "\n"
     "   .. note:: If any of the columns are not unit length this may not have desired results.\n");
 static PyObject *Matrix_rotate(MatrixObject *self, PyObject *value)
 {
   float self_rmat[3][3], other_rmat[3][3], rmat[3][3];
 
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return NULL;
   }
 
   if (mathutils_any_to_rotmat(other_rmat, value, "matrix.rotate(value)") == -1) {
     return NULL;
   }
 
   if (self->num_row != 3 || self->num_col != 3) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.rotate(): "
                     "must have 3x3 dimensions");
     return NULL;
   }
 
   matrix_as_3x3(self_rmat, self);
   mul_m3_m3m3(rmat, other_rmat, self_rmat);
 
   copy_m3_m3((float(*)[3])(self->matrix), rmat);
 
   (void)BaseMath_WriteCallback(self);
   Py_RETURN_NONE;
 }
 
 /*---------------------------matrix.decompose() ---------------------*/
 PyDoc_STRVAR(Matrix_decompose_doc,
              ".. method:: decompose()\n"
              "\n"
              "   Return the translation, rotation, and scale components of this matrix.\n"
              "\n"
              "   :return: tuple of translation, rotation, and scale\n"
              "   :rtype: (:class:`Vector`, :class:`Quaternion`, :class:`Vector`)");
 static PyObject *Matrix_decompose(MatrixObject *self)
 {
   PyObject *ret;
   float loc[3];
   float rot[3][3];
   float quat[4];
   float size[3];
 
   if (self->num_row != 4 || self->num_col != 4) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.decompose(): "
                     "inappropriate matrix size - expects 4x4 matrix");
     return NULL;
   }
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   mat4_to_loc_rot_size(loc, rot, size, (float(*)[4])self->matrix);
   mat3_to_quat(quat, rot);
 
   ret = PyTuple_New(3);
   PyTuple_SET_ITEMS(ret,
                     Vector_CreatePyObject(loc, 3, NULL),
                     Quaternion_CreatePyObject(quat, NULL),
                     Vector_CreatePyObject(size, 3, NULL));
   return ret;
 }
 
 PyDoc_STRVAR(Matrix_lerp_doc,
              ".. function:: lerp(other, factor)\n"
              "\n"
              "   Returns the interpolation of two matrices. Uses polar decomposition, see"
              "   \"Matrix Animation and Polar Decomposition\", Shoemake and Duff, 1992.\n"
              "\n"
              "   :arg other: value to interpolate with.\n"
              "   :type other: :class:`Matrix`\n"
              "   :arg factor: The interpolation value in [0.0, 1.0].\n"
              "   :type factor: float\n"
              "   :return: The interpolated matrix.\n"
              "   :rtype: :class:`Matrix`\n");
 static PyObject *Matrix_lerp(MatrixObject *self, PyObject *args)
 {
   MatrixObject *mat2 = NULL;
   float fac, mat[MATRIX_MAX_DIM * MATRIX_MAX_DIM];
 
   if (!PyArg_ParseTuple(args, "O!f:lerp", &matrix_Type, &mat2, &fac)) {
     return NULL;
   }
 
   if (self->num_col != mat2->num_col || self->num_row != mat2->num_row) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.lerp(): "
                     "expects both matrix objects of the same dimensions");
     return NULL;
   }
 
   if (BaseMath_ReadCallback(self) == -1 || BaseMath_ReadCallback(mat2) == -1) {
     return NULL;
   }
 
   /* TODO, different sized matrix */
   if (self->num_col == 4 && self->num_row == 4) {
 #ifdef MATH_STANDALONE
     blend_m4_m4m4((float(*)[4])mat, (float(*)[4])self->matrix, (float(*)[4])mat2->matrix, fac);
 #else
     interp_m4_m4m4((float(*)[4])mat, (float(*)[4])self->matrix, (float(*)[4])mat2->matrix, fac);
 #endif
   }
   else if (self->num_col == 3 && self->num_row == 3) {
 #ifdef MATH_STANDALONE
     blend_m3_m3m3((float(*)[3])mat, (float(*)[3])self->matrix, (float(*)[3])mat2->matrix, fac);
 #else
     interp_m3_m3m3((float(*)[3])mat, (float(*)[3])self->matrix, (float(*)[3])mat2->matrix, fac);
 #endif
   }
   else {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.lerp(): "
                     "only 3x3 and 4x4 matrices supported");
     return NULL;
   }
 
   return Matrix_CreatePyObject(mat, self->num_col, self->num_row, Py_TYPE(self));
 }
 
 /*---------------------------matrix.determinant() ----------------*/
 PyDoc_STRVAR(
     Matrix_determinant_doc,
     ".. method:: determinant()\n"
     "\n"
     "   Return the determinant of a matrix.\n"
     "\n"
     "   :return: Return the determinant of a matrix.\n"
     "   :rtype: float\n"
     "\n"
     "   .. seealso:: `Determinant <https://en.wikipedia.org/wiki/Determinant>`__ on Wikipedia.\n");
 static PyObject *Matrix_determinant(MatrixObject *self)
 {
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if (self->num_col != self->num_row) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.determinant(): "
                     "only square matrices are supported");
     return NULL;
   }
 
   return PyFloat_FromDouble((double)matrix_determinant_internal(self));
 }
 /*---------------------------matrix.transpose() ------------------*/
 PyDoc_STRVAR(
     Matrix_transpose_doc,
     ".. method:: transpose()\n"
     "\n"
     "   Set the matrix to its transpose.\n"
     "\n"
     "   .. seealso:: `Transpose <https://en.wikipedia.org/wiki/Transpose>`__ on Wikipedia.\n");
 static PyObject *Matrix_transpose(MatrixObject *self)
 {
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return NULL;
   }
 
   if (self->num_col != self->num_row) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.transpose(d): "
                     "only square matrices are supported");
     return NULL;
   }
 
   if (self->num_col == 2) {
     const float t = MATRIX_ITEM(self, 1, 0);
     MATRIX_ITEM(self, 1, 0) = MATRIX_ITEM(self, 0, 1);
     MATRIX_ITEM(self, 0, 1) = t;
   }
   else if (self->num_col == 3) {
     transpose_m3((float(*)[3])self->matrix);
   }
   else {
     transpose_m4((float(*)[4])self->matrix);
   }
 
   (void)BaseMath_WriteCallback(self);
   Py_RETURN_NONE;
 }
 
 PyDoc_STRVAR(Matrix_transposed_doc,
              ".. method:: transposed()\n"
              "\n"
              "   Return a new, transposed matrix.\n"
              "\n"
              "   :return: a transposed matrix\n"
              "   :rtype: :class:`Matrix`\n");
 static PyObject *Matrix_transposed(MatrixObject *self)
 {
-  return matrix__apply_to_copy((PyNoArgsFunction)Matrix_transpose, self);
+  return matrix__apply_to_copy(Matrix_transpose, self);
 }
 
 /*---------------------------matrix.normalize() ------------------*/
 PyDoc_STRVAR(Matrix_normalize_doc,
              ".. method:: normalize()\n"
              "\n"
              "   Normalize each of the matrix columns.\n");
 static PyObject *Matrix_normalize(MatrixObject *self)
 {
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return NULL;
   }
 
   if (self->num_col != self->num_row) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.normalize(): "
                     "only square matrices are supported");
     return NULL;
   }
 
   if (self->num_col == 3) {
     normalize_m3((float(*)[3])self->matrix);
   }
   else if (self->num_col == 4) {
     normalize_m4((float(*)[4])self->matrix);
   }
   else {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.normalize(): "
                     "can only use a 3x3 or 4x4 matrix");
   }
 
   (void)BaseMath_WriteCallback(self);
   Py_RETURN_NONE;
 }
 
 PyDoc_STRVAR(Matrix_normalized_doc,
              ".. method:: normalized()\n"
              "\n"
              "   Return a column normalized matrix\n"
              "\n"
              "   :return: a column normalized matrix\n"
              "   :rtype: :class:`Matrix`\n");
 static PyObject *Matrix_normalized(MatrixObject *self)
 {
-  return matrix__apply_to_copy((PyNoArgsFunction)Matrix_normalize, self);
+  return matrix__apply_to_copy(Matrix_normalize, self);
 }
 
 /*---------------------------matrix.zero() -----------------------*/
 PyDoc_STRVAR(Matrix_zero_doc,
              ".. method:: zero()\n"
              "\n"
              "   Set all the matrix values to zero.\n"
              "\n"
              "   :rtype: :class:`Matrix`\n");
 static PyObject *Matrix_zero(MatrixObject *self)
 {
   if (BaseMath_Prepare_ForWrite(self) == -1) {
     return NULL;
   }
 
   copy_vn_fl(self->matrix, self->num_col * self->num_row, 0.0f);
 
   if (BaseMath_WriteCallback(self) == -1) {
     return NULL;
   }
 
   Py_RETURN_NONE;
 }
 /*---------------------------matrix.identity(() ------------------*/
 static void matrix_identity_internal(MatrixObject *self)
 {
   BLI_assert((self->num_col == self->num_row) && (self->num_row <= 4));
 
   if (self->num_col == 2) {
     unit_m2((float(*)[2])self->matrix);
   }
   else if (self->num_col == 3) {
     unit_m3((float(*)[3])self->matrix);
   }
   else {
     unit_m4((float(*)[4])self->matrix);
   }
 }
 
 PyDoc_STRVAR(Matrix_identity_doc,
              ".. method:: identity()\n"
              "\n"
              "   Set the matrix to the identity matrix.\n"
              "\n"
              "   .. note:: An object with a location and rotation of zero, and a scale of one\n"
              "      will have an identity matrix.\n"
              "\n"
              "   .. seealso:: `Identity matrix <https://en.wikipedia.org/wiki/Identity_matrix>`__ "
              "on Wikipedia.\n");
 static PyObject *Matrix_identity(MatrixObject *self)
 {
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return NULL;
   }
 
   if (self->num_col != self->num_row) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix.identity(): "
                     "only square matrices are supported");
     return NULL;
   }
 
   matrix_identity_internal(self);
 
   if (BaseMath_WriteCallback(self) == -1) {
     return NULL;
   }
 
   Py_RETURN_NONE;
 }
 
 /*---------------------------Matrix.copy() ------------------*/
 
 static PyObject *Matrix_copy_notest(MatrixObject *self, const float *matrix)
 {
   return Matrix_CreatePyObject((float *)matrix, self->num_col, self->num_row, Py_TYPE(self));
 }
 
 PyDoc_STRVAR(Matrix_copy_doc,
              ".. method:: copy()\n"
              "\n"
              "   Returns a copy of this matrix.\n"
              "\n"
              "   :return: an instance of itself\n"
              "   :rtype: :class:`Matrix`\n");
 static PyObject *Matrix_copy(MatrixObject *self)
 {
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   return Matrix_copy_notest(self, self->matrix);
 }
 static PyObject *Matrix_deepcopy(MatrixObject *self, PyObject *args)
 {
   if (!PyC_CheckArgs_DeepCopy(args)) {
     return NULL;
   }
   return Matrix_copy(self);
 }
 
 /*----------------------------print object (internal)-------------*/
 /* print the object to screen */
 static PyObject *Matrix_repr(MatrixObject *self)
 {
   int col, row;
   PyObject *rows[MATRIX_MAX_DIM] = {NULL};
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   for (row = 0; row < self->num_row; row++) {
     rows[row] = PyTuple_New(self->num_col);
     for (col = 0; col < self->num_col; col++) {
       PyTuple_SET_ITEM(rows[row], col, PyFloat_FromDouble(MATRIX_ITEM(self, row, col)));
     }
   }
   switch (self->num_row) {
     case 2:
       return PyUnicode_FromFormat(
           "Matrix((%R,\n"
           "        %R))",
           rows[0],
           rows[1]);
 
     case 3:
       return PyUnicode_FromFormat(
           "Matrix((%R,\n"
           "        %R,\n"
           "        %R))",
           rows[0],
           rows[1],
           rows[2]);
 
     case 4:
       return PyUnicode_FromFormat(
           "Matrix((%R,\n"
           "        %R,\n"
           "        %R,\n"
           "        %R))",
           rows[0],
           rows[1],
           rows[2],
           rows[3]);
   }
 
   Py_FatalError("Matrix(): invalid row size!");
   return NULL;
 }
 
 #ifndef MATH_STANDALONE
 static PyObject *Matrix_str(MatrixObject *self)
 {
   DynStr *ds;
 
   int maxsize[MATRIX_MAX_DIM];
   int row, col;
 
   char dummy_buf[64];
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   ds = BLI_dynstr_new();
 
   /* First determine the maximum width for each column */
   for (col = 0; col < self->num_col; col++) {
     maxsize[col] = 0;
     for (row = 0; row < self->num_row; row++) {
       int size = BLI_snprintf(dummy_buf, sizeof(dummy_buf), "%.4f", MATRIX_ITEM(self, row, col));
       maxsize[col] = max_ii(maxsize[col], size);
     }
   }
 
   /* Now write the unicode string to be printed */
   BLI_dynstr_appendf(ds, "<Matrix %dx%d (", self->num_row, self->num_col);
   for (row = 0; row < self->num_row; row++) {
     for (col = 0; col < self->num_col; col++) {
       BLI_dynstr_appendf(ds, col ? ", %*.4f" : "%*.4f", maxsize[col], MATRIX_ITEM(self, row, col));
     }
     BLI_dynstr_append(ds, row + 1 != self->num_row ? ")\n            (" : ")");
   }
   BLI_dynstr_append(ds, ">");
 
   return mathutils_dynstr_to_py(ds); /* frees ds */
 }
 #endif
 
 static PyObject *Matrix_richcmpr(PyObject *a, PyObject *b, int op)
 {
   PyObject *res;
   int ok = -1; /* zero is true */
 
   if (MatrixObject_Check(a) && MatrixObject_Check(b)) {
     MatrixObject *matA = (MatrixObject *)a;
     MatrixObject *matB = (MatrixObject *)b;
 
     if (BaseMath_ReadCallback(matA) == -1 || BaseMath_ReadCallback(matB) == -1) {
       return NULL;
     }
 
     ok = ((matA->num_row == matB->num_row) && (matA->num_col == matB->num_col) &&
           EXPP_VectorsAreEqual(matA->matrix, matB->matrix, (matA->num_col * matA->num_row), 1)) ?
              0 :
              -1;
   }
 
   switch (op) {
     case Py_NE:
       ok = !ok;
       ATTR_FALLTHROUGH;
     case Py_EQ:
       res = ok ? Py_False : Py_True;
       break;
 
     case Py_LT:
     case Py_LE:
     case Py_GT:
     case Py_GE:
       res = Py_NotImplemented;
       break;
     default:
       PyErr_BadArgument();
       return NULL;
   }
 
   return Py_INCREF_RET(res);
 }
 
 static Py_hash_t Matrix_hash(MatrixObject *self)
 {
   float mat[MATRIX_MAX_DIM * MATRIX_MAX_DIM];
 
   if (BaseMath_ReadCallback(self) == -1) {
     return -1;
   }
 
   if (BaseMathObject_Prepare_ForHash(self) == -1) {
     return -1;
   }
 
   matrix_transpose_internal(mat, self);
 
   return mathutils_array_hash(mat, self->num_row * self->num_col);
 }
 
 /*---------------------SEQUENCE PROTOCOLS------------------------
  * ----------------------------len(object)------------------------
  * sequence length */
 static int Matrix_len(MatrixObject *self)
 {
   return self->num_row;
 }
 /*----------------------------object[]---------------------------
  * sequence accessor (get)
  * the wrapped vector gives direct access to the matrix data */
 static PyObject *Matrix_item_row(MatrixObject *self, int row)
 {
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return NULL;
   }
 
   if (row < 0 || row >= self->num_row) {
     PyErr_SetString(PyExc_IndexError,
                     "matrix[attribute]: "
                     "array index out of range");
     return NULL;
   }
   return Vector_CreatePyObject_cb(
       (PyObject *)self, self->num_col, mathutils_matrix_row_cb_index, row);
 }
 /* same but column access */
 static PyObject *Matrix_item_col(MatrixObject *self, int col)
 {
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return NULL;
   }
 
   if (col < 0 || col >= self->num_col) {
     PyErr_SetString(PyExc_IndexError,
                     "matrix[attribute]: "
                     "array index out of range");
     return NULL;
   }
   return Vector_CreatePyObject_cb(
       (PyObject *)self, self->num_row, mathutils_matrix_col_cb_index, col);
 }
 
 /*----------------------------object[]-------------------------
  * sequence accessor (set) */
 
 static int Matrix_ass_item_row(MatrixObject *self, int row, PyObject *value)
 {
   int col;
   float vec[MATRIX_MAX_DIM];
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return -1;
   }
 
   if (row >= self->num_row || row < 0) {
     PyErr_SetString(PyExc_IndexError, "matrix[attribute] = x: bad row");
     return -1;
   }
 
   if (mathutils_array_parse(
           vec, self->num_col, self->num_col, value, "matrix[i] = value assignment") == -1) {
     return -1;
   }
 
   /* Since we are assigning a row we cannot memcpy */
   for (col = 0; col < self->num_col; col++) {
     MATRIX_ITEM(self, row, col) = vec[col];
   }
 
   (void)BaseMath_WriteCallback(self);
   return 0;
 }
 static int Matrix_ass_item_col(MatrixObject *self, int col, PyObject *value)
 {
   int row;
   float vec[MATRIX_MAX_DIM];
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return -1;
   }
 
   if (col >= self->num_col || col < 0) {
     PyErr_SetString(PyExc_IndexError, "matrix[attribute] = x: bad col");
     return -1;
   }
 
   if (mathutils_array_parse(
           vec, self->num_row, self->num_row, value, "matrix[i] = value assignment") == -1) {
     return -1;
   }
 
   /* Since we are assigning a row we cannot memcpy */
   for (row = 0; row < self->num_row; row++) {
     MATRIX_ITEM(self, row, col) = vec[row];
   }
 
   (void)BaseMath_WriteCallback(self);
   return 0;
 }
 
 /*----------------------------object[z:y]------------------------
  * sequence slice (get)*/
 static PyObject *Matrix_slice(MatrixObject *self, int begin, int end)
 {
 
   PyObject *tuple;
   int count;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   CLAMP(begin, 0, self->num_row);
   CLAMP(end, 0, self->num_row);
   begin = MIN2(begin, end);
 
   tuple = PyTuple_New(end - begin);
   for (count = begin; count < end; count++) {
     PyTuple_SET_ITEM(tuple,
                      count - begin,
                      Vector_CreatePyObject_cb(
                          (PyObject *)self, self->num_col, mathutils_matrix_row_cb_index, count));
   }
 
   return tuple;
 }
 /*----------------------------object[z:y]------------------------
  * sequence slice (set)*/
 static int Matrix_ass_slice(MatrixObject *self, int begin, int end, PyObject *value)
 {
   PyObject *value_fast;
 
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return -1;
   }
 
   CLAMP(begin, 0, self->num_row);
   CLAMP(end, 0, self->num_row);
   begin = MIN2(begin, end);
 
   /* non list/tuple cases */
   if (!(value_fast = PySequence_Fast(value, "matrix[begin:end] = value"))) {
     /* PySequence_Fast sets the error */
     return -1;
   }
   else {
     PyObject **value_fast_items = PySequence_Fast_ITEMS(value_fast);
     const int size = end - begin;
     int row, col;
     float mat[MATRIX_MAX_DIM * MATRIX_MAX_DIM];
     float vec[4];
 
     if (PySequence_Fast_GET_SIZE(value_fast) != size) {
       Py_DECREF(value_fast);
       PyErr_SetString(PyExc_ValueError,
                       "matrix[begin:end] = []: "
                       "size mismatch in slice assignment");
       return -1;
     }
 
     memcpy(mat, self->matrix, self->num_col * self->num_row * sizeof(float));
 
     /* parse sub items */
     for (row = begin; row < end; row++) {
       /* parse each sub sequence */
       PyObject *item = value_fast_items[row - begin];
 
       if (mathutils_array_parse(
               vec, self->num_col, self->num_col, item, "matrix[begin:end] = value assignment") ==
           -1) {
         Py_DECREF(value_fast);
         return -1;
       }
 
       for (col = 0; col < self->num_col; col++) {
         mat[col * self->num_row + row] = vec[col];
       }
     }
 
     Py_DECREF(value_fast);
 
     /*parsed well - now set in matrix*/
     memcpy(self->matrix, mat, self->num_col * self->num_row * sizeof(float));
 
     (void)BaseMath_WriteCallback(self);
     return 0;
   }
 }
 /*------------------------NUMERIC PROTOCOLS----------------------
  *------------------------obj + obj------------------------------*/
 static PyObject *Matrix_add(PyObject *m1, PyObject *m2)
 {
   float mat[MATRIX_MAX_DIM * MATRIX_MAX_DIM];
   MatrixObject *mat1 = NULL, *mat2 = NULL;
 
   mat1 = (MatrixObject *)m1;
   mat2 = (MatrixObject *)m2;
 
   if (!MatrixObject_Check(m1) || !MatrixObject_Check(m2)) {
     PyErr_Format(PyExc_TypeError,
                  "Matrix addition: (%s + %s) "
                  "invalid type for this operation",
                  Py_TYPE(m1)->tp_name,
                  Py_TYPE(m2)->tp_name);
     return NULL;
   }
 
   if (BaseMath_ReadCallback(mat1) == -1 || BaseMath_ReadCallback(mat2) == -1) {
     return NULL;
   }
 
   if (mat1->num_col != mat2->num_col || mat1->num_row != mat2->num_row) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix addition: "
                     "matrices must have the same dimensions for this operation");
     return NULL;
   }
 
   add_vn_vnvn(mat, mat1->matrix, mat2->matrix, mat1->num_col * mat1->num_row);
 
   return Matrix_CreatePyObject(mat, mat1->num_col, mat1->num_row, Py_TYPE(mat1));
 }
 /*------------------------obj - obj------------------------------
  * subtraction */
 static PyObject *Matrix_sub(PyObject *m1, PyObject *m2)
 {
   float mat[MATRIX_MAX_DIM * MATRIX_MAX_DIM];
   MatrixObject *mat1 = NULL, *mat2 = NULL;
 
   mat1 = (MatrixObject *)m1;
   mat2 = (MatrixObject *)m2;
 
   if (!MatrixObject_Check(m1) || !MatrixObject_Check(m2)) {
     PyErr_Format(PyExc_TypeError,
                  "Matrix subtraction: (%s - %s) "
                  "invalid type for this operation",
                  Py_TYPE(m1)->tp_name,
                  Py_TYPE(m2)->tp_name);
     return NULL;
   }
 
   if (BaseMath_ReadCallback(mat1) == -1 || BaseMath_ReadCallback(mat2) == -1) {
     return NULL;
   }
 
   if (mat1->num_col != mat2->num_col || mat1->num_row != mat2->num_row) {
     PyErr_SetString(PyExc_ValueError,
                     "Matrix addition: "
                     "matrices must have the same dimensions for this operation");
     return NULL;
   }
 
   sub_vn_vnvn(mat, mat1->matrix, mat2->matrix, mat1->num_col * mat1->num_row);
 
   return Matrix_CreatePyObject(mat, mat1->num_col, mat1->num_row, Py_TYPE(mat1));
 }
 /*------------------------obj * obj------------------------------
  * element-wise multiplication */
 static PyObject *matrix_mul_float(MatrixObject *mat, const float scalar)
 {
   float tmat[MATRIX_MAX_DIM * MATRIX_MAX_DIM];
   mul_vn_vn_fl(tmat, mat->matrix, mat->num_col * mat->num_row, scalar);
   return Matrix_CreatePyObject(tmat, mat->num_col, mat->num_row, Py_TYPE(mat));
 }
 
 static PyObject *Matrix_mul(PyObject *m1, PyObject *m2)
 {
   float scalar;
 
   MatrixObject *mat1 = NULL, *mat2 = NULL;
 
   if (MatrixObject_Check(m1)) {
     mat1 = (MatrixObject *)m1;
     if (BaseMath_ReadCallback(mat1) == -1) {
       return NULL;
     }
   }
   if (MatrixObject_Check(m2)) {
     mat2 = (MatrixObject *)m2;
     if (BaseMath_ReadCallback(mat2) == -1) {
       return NULL;
     }
   }
 
   if (mat1 && mat2) {
 #ifdef USE_MATHUTILS_ELEM_MUL
     /* MATRIX * MATRIX */
     float mat[MATRIX_MAX_DIM * MATRIX_MAX_DIM];
 
     if ((mat1->num_row != mat2->num_row) || (mat1->num_col != mat2->num_col)) {
       PyErr_SetString(PyExc_ValueError,
                       "matrix1 * matrix2: matrix1 number of rows/columns "
                       "and the matrix2 number of rows/columns must be the same");
       return NULL;
     }
 
     mul_vn_vnvn(mat, mat1->matrix, mat2->matrix, mat1->num_col * mat1->num_row);
 
     return Matrix_CreatePyObject(mat, mat2->num_col, mat1->num_row, Py_TYPE(mat1));
 #endif
   }
   else if (mat2) {
     /*FLOAT/INT * MATRIX */
     if (((scalar = PyFloat_AsDouble(m1)) == -1.0f && PyErr_Occurred()) == 0) {
       return matrix_mul_float(mat2, scalar);
     }
   }
   else if (mat1) {
     /* MATRIX * FLOAT/INT */
     if (((scalar = PyFloat_AsDouble(m2)) == -1.0f && PyErr_Occurred()) == 0) {
       return matrix_mul_float(mat1, scalar);
     }
   }
 
   PyErr_Format(PyExc_TypeError,
                "Element-wise multiplication: "
                "not supported between '%.200s' and '%.200s' types",
                Py_TYPE(m1)->tp_name,
                Py_TYPE(m2)->tp_name);
   return NULL;
 }
 /*------------------------obj *= obj------------------------------
  * In place element-wise multiplication */
 static PyObject *Matrix_imul(PyObject *m1, PyObject *m2)
 {
   float scalar;
 
   MatrixObject *mat1 = NULL, *mat2 = NULL;
 
   if (MatrixObject_Check(m1)) {
     mat1 = (MatrixObject *)m1;
     if (BaseMath_ReadCallback(mat1) == -1) {
       return NULL;
     }
   }
   if (MatrixObject_Check(m2)) {
     mat2 = (MatrixObject *)m2;
     if (BaseMath_ReadCallback(mat2) == -1) {
       return NULL;
     }
   }
 
   if (mat1 && mat2) {
 #ifdef USE_MATHUTILS_ELEM_MUL
     /* MATRIX *= MATRIX */
     if ((mat1->num_row != mat2->num_row) || (mat1->num_col != mat2->num_col)) {
       PyErr_SetString(PyExc_ValueError,
                       "matrix1 *= matrix2: matrix1 number of rows/columns "
                       "and the matrix2 number of rows/columns must be the same");
       return NULL;
     }
 
     mul_vn_vn(mat1->matrix, mat2->matrix, mat1->num_col * mat1->num_row);
 #else
     PyErr_Format(PyExc_TypeError,
                  "In place element-wise multiplication: "
                  "not supported between '%.200s' and '%.200s' types",
                  Py_TYPE(m1)->tp_name,
                  Py_TYPE(m2)->tp_name);
     return NULL;
 #endif
   }
   else if (mat1 && (((scalar = PyFloat_AsDouble(m2)) == -1.0f && PyErr_Occurred()) == 0)) {
     /* MATRIX *= FLOAT/INT */
     mul_vn_fl(mat1->matrix, mat1->num_row * mat1->num_col, scalar);
   }
   else {
     PyErr_Format(PyExc_TypeError,
                  "In place element-wise multiplication: "
                  "not supported between '%.200s' and '%.200s' types",
                  Py_TYPE(m1)->tp_name,
                  Py_TYPE(m2)->tp_name);
     return NULL;
   }
 
   (void)BaseMath_WriteCallback(mat1);
   Py_INCREF(m1);
   return m1;
 }
 /*------------------------obj @ obj------------------------------
  * matrix multiplication */
 static PyObject *Matrix_matmul(PyObject *m1, PyObject *m2)
 {
   int vec_size;
 
   MatrixObject *mat1 = NULL, *mat2 = NULL;
 
   if (MatrixObject_Check(m1)) {
     mat1 = (MatrixObject *)m1;
     if (BaseMath_ReadCallback(mat1) == -1) {
       return NULL;
     }
   }
   if (MatrixObject_Check(m2)) {
     mat2 = (MatrixObject *)m2;
     if (BaseMath_ReadCallback(mat2) == -1) {
       return NULL;
     }
   }
 
   if (mat1 && mat2) {
     /* MATRIX @ MATRIX */
     float mat[MATRIX_MAX_DIM * MATRIX_MAX_DIM];
 
     int col, row, item;
 
     if (mat1->num_col != mat2->num_row) {
       PyErr_SetString(PyExc_ValueError,
                       "matrix1 * matrix2: matrix1 number of columns "
                       "and the matrix2 number of rows must be the same");
       return NULL;
     }
 
     for (col = 0; col < mat2->num_col; col++) {
       for (row = 0; row < mat1->num_row; row++) {
         double dot = 0.0f;
         for (item = 0; item < mat1->num_col; item++) {
           dot += (double)(MATRIX_ITEM(mat1, row, item) * MATRIX_ITEM(mat2, item, col));
         }
         mat[(col * mat1->num_row) + row] = (float)dot;
       }
     }
 
     return Matrix_CreatePyObject(mat, mat2->num_col, mat1->num_row, Py_TYPE(mat1));
   }
   else if (mat1) {
     /* MATRIX @ VECTOR */
     if (VectorObject_Check(m2)) {
       VectorObject *vec2 = (VectorObject *)m2;
       float tvec[MATRIX_MAX_DIM];
       if (BaseMath_ReadCallback(vec2) == -1) {
         return NULL;
       }
       if (column_vector_multiplication(tvec, vec2, mat1) == -1) {
         return NULL;
       }
 
       if (mat1->num_col == 4 && vec2->size == 3) {
         vec_size = 3;
       }
       else {
         vec_size = mat1->num_row;
       }
 
       return Vector_CreatePyObject(tvec, vec_size, Py_TYPE(m2));
     }
   }
 
   PyErr_Format(PyExc_TypeError,
                "Matrix multiplication: "
                "not supported between '%.200s' and '%.200s' types",
                Py_TYPE(m1)->tp_name,
                Py_TYPE(m2)->tp_name);
   return NULL;
 }
 /*------------------------obj @= obj------------------------------
  * In place matrix multiplication */
 static PyObject *Matrix_imatmul(PyObject *m1, PyObject *m2)
 {
   MatrixObject *mat1 = NULL, *mat2 = NULL;
 
   if (MatrixObject_Check(m1)) {
     mat1 = (MatrixObject *)m1;
     if (BaseMath_ReadCallback(mat1) == -1) {
       return NULL;
     }
   }
   if (MatrixObject_Check(m2)) {
     mat2 = (MatrixObject *)m2;
     if (BaseMath_ReadCallback(mat2) == -1) {
       return NULL;
     }
   }
 
   if (mat1 && mat2) {
     /* MATRIX @= MATRIX */
     float mat[MATRIX_MAX_DIM * MATRIX_MAX_DIM];
     int col, row, item;
 
     if (mat1->num_col != mat2->num_row) {
       PyErr_SetString(PyExc_ValueError,
                       "matrix1 * matrix2: matrix1 number of columns "
                       "and the matrix2 number of rows must be the same");
       return NULL;
     }
 
     for (col = 0; col < mat2->num_col; col++) {
       for (row = 0; row < mat1->num_row; row++) {
         double dot = 0.0f;
         for (item = 0; item < mat1->num_col; item++) {
           dot += (double)(MATRIX_ITEM(mat1, row, item) * MATRIX_ITEM(mat2, item, col));
         }
         /* store in new matrix as overwriting original at this point will cause
          * subsequent iterations to use incorrect values */
         mat[(col * mat1->num_row) + row] = (float)dot;
       }
     }
 
     /* copy matrix back */
     memcpy(mat1->matrix, mat, (mat1->num_row * mat1->num_col) * sizeof(float));
   }
   else {
     PyErr_Format(PyExc_TypeError,
                  "In place matrix multiplication: "
                  "not supported between '%.200s' and '%.200s' types",
                  Py_TYPE(m1)->tp_name,
                  Py_TYPE(m2)->tp_name);
     return NULL;
   }
 
   (void)BaseMath_WriteCallback(mat1);
   Py_INCREF(m1);
   return m1;
 }
 
 /*-----------------PROTOCOL DECLARATIONS--------------------------*/
 static PySequenceMethods Matrix_SeqMethods = {
     (lenfunc)Matrix_len,                  /* sq_length */
     (binaryfunc)NULL,                     /* sq_concat */
     (ssizeargfunc)NULL,                   /* sq_repeat */
     (ssizeargfunc)Matrix_item_row,        /* sq_item */
     (ssizessizeargfunc)NULL,              /* sq_slice, deprecated */
     (ssizeobjargproc)Matrix_ass_item_row, /* sq_ass_item */
     (ssizessizeobjargproc)NULL,           /* sq_ass_slice, deprecated */
     (objobjproc)NULL,                     /* sq_contains */
     (binaryfunc)NULL,                     /* sq_inplace_concat */
     (ssizeargfunc)NULL,                   /* sq_inplace_repeat */
 };
 
 static PyObject *Matrix_subscript(MatrixObject *self, PyObject *item)
 {
   if (PyIndex_Check(item)) {
     Py_ssize_t i;
     i = PyNumber_AsSsize_t(item, PyExc_IndexError);
     if (i == -1 && PyErr_Occurred()) {
       return NULL;
     }
     if (i < 0) {
       i += self->num_row;
     }
     return Matrix_item_row(self, i);
   }
   else if (PySlice_Check(item)) {
     Py_ssize_t start, stop, step, slicelength;
 
     if (PySlice_GetIndicesEx(item, self->num_row, &start, &stop, &step, &slicelength) < 0) {
       return NULL;
     }
 
     if (slicelength <= 0) {
       return PyTuple_New(0);
     }
     else if (step == 1) {
       return Matrix_slice(self, start, stop);
     }
     else {
       PyErr_SetString(PyExc_IndexError, "slice steps not supported with matrices");
       return NULL;
     }
   }
   else {
     PyErr_Format(
         PyExc_TypeError, "matrix indices must be integers, not %.200s", Py_TYPE(item)->tp_name);
     return NULL;
   }
 }
 
 static int Matrix_ass_subscript(MatrixObject *self, PyObject *item, PyObject *value)
 {
   if (PyIndex_Check(item)) {
     Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError);
     if (i == -1 && PyErr_Occurred()) {
       return -1;
     }
     if (i < 0) {
       i += self->num_row;
     }
     return Matrix_ass_item_row(self, i, value);
   }
   else if (PySlice_Check(item)) {
     Py_ssize_t start, stop, step, slicelength;
 
     if (PySlice_GetIndicesEx(item, self->num_row, &start, &stop, &step, &slicelength) < 0) {
       return -1;
     }
 
     if (step == 1) {
       return Matrix_ass_slice(self, start, stop, value);
     }
     else {
       PyErr_SetString(PyExc_IndexError, "slice steps not supported with matrices");
       return -1;
     }
   }
   else {
     PyErr_Format(
         PyExc_TypeError, "matrix indices must be integers, not %.200s", Py_TYPE(item)->tp_name);
     return -1;
   }
 }
 
 static PyMappingMethods Matrix_AsMapping = {
     (lenfunc)Matrix_len,
     (binaryfunc)Matrix_subscript,
     (objobjargproc)Matrix_ass_subscript,
 };
 
 static PyNumberMethods Matrix_NumMethods = {
     (binaryfunc)Matrix_add,            /*nb_add*/
     (binaryfunc)Matrix_sub,            /*nb_subtract*/
     (binaryfunc)Matrix_mul,            /*nb_multiply*/
     NULL,                              /*nb_remainder*/
     NULL,                              /*nb_divmod*/
     NULL,                              /*nb_power*/
     (unaryfunc)0,                      /*nb_negative*/
     (unaryfunc)0,                      /*tp_positive*/
     (unaryfunc)0,                      /*tp_absolute*/
     (inquiry)0,                        /*tp_bool*/
     (unaryfunc)Matrix_inverted_noargs, /*nb_invert*/
     NULL,                              /*nb_lshift*/
     (binaryfunc)0,                     /*nb_rshift*/
     NULL,                              /*nb_and*/
     NULL,                              /*nb_xor*/
     NULL,                              /*nb_or*/
     NULL,                              /*nb_int*/
     NULL,                              /*nb_reserved*/
     NULL,                              /*nb_float*/
     NULL,                              /* nb_inplace_add */
     NULL,                              /* nb_inplace_subtract */
     (binaryfunc)Matrix_imul,           /* nb_inplace_multiply */
     NULL,                              /* nb_inplace_remainder */
     NULL,                              /* nb_inplace_power */
     NULL,                              /* nb_inplace_lshift */
     NULL,                              /* nb_inplace_rshift */
     NULL,                              /* nb_inplace_and */
     NULL,                              /* nb_inplace_xor */
     NULL,                              /* nb_inplace_or */
     NULL,                              /* nb_floor_divide */
     NULL,                              /* nb_true_divide */
     NULL,                              /* nb_inplace_floor_divide */
     NULL,                              /* nb_inplace_true_divide */
     NULL,                              /* nb_index */
     (binaryfunc)Matrix_matmul,         /* nb_matrix_multiply */
     (binaryfunc)Matrix_imatmul,        /* nb_inplace_matrix_multiply */
 };
 
 PyDoc_STRVAR(Matrix_translation_doc, "The translation component of the matrix.\n\n:type: Vector");
 static PyObject *Matrix_translation_get(MatrixObject *self, void *UNUSED(closure))
 {
   PyObject *ret;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   /*must be 4x4 square matrix*/
   if (self->num_row != 4 || self->num_col != 4) {
     PyErr_SetString(PyExc_AttributeError,
                     "Matrix.translation: "
                     "inappropriate matrix size, must be 4x4");
     return NULL;
   }
 
   ret = (PyObject *)Vector_CreatePyObject_cb(
       (PyObject *)self, 3, mathutils_matrix_translation_cb_index, 3);
 
   return ret;
 }
 
 static int Matrix_translation_set(MatrixObject *self, PyObject *value, void *UNUSED(closure))
 {
   float tvec[3];
 
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return -1;
   }
 
   /*must be 4x4 square matrix*/
   if (self->num_row != 4 || self->num_col != 4) {
     PyErr_SetString(PyExc_AttributeError,
                     "Matrix.translation: "
                     "inappropriate matrix size, must be 4x4");
     return -1;
   }
 
   if ((mathutils_array_parse(tvec, 3, 3, value, "Matrix.translation")) == -1) {
     return -1;
   }
 
   copy_v3_v3(((float(*)[4])self->matrix)[3], tvec);
 
   (void)BaseMath_WriteCallback(self);
 
   return 0;
 }
 
 PyDoc_STRVAR(Matrix_row_doc,
              "Access the matrix by rows (default), (read-only).\n\n:type: Matrix Access");
 static PyObject *Matrix_row_get(MatrixObject *self, void *UNUSED(closure))
 {
   return MatrixAccess_CreatePyObject(self, MAT_ACCESS_ROW);
 }
 
 PyDoc_STRVAR(
     Matrix_col_doc,
     "Access the matrix by columns, 3x3 and 4x4 only, (read-only).\n\n:type: Matrix Access");
 static PyObject *Matrix_col_get(MatrixObject *self, void *UNUSED(closure))
 {
   return MatrixAccess_CreatePyObject(self, MAT_ACCESS_COL);
 }
 
 PyDoc_STRVAR(Matrix_median_scale_doc,
              "The average scale applied to each axis (read-only).\n\n:type: float");
 static PyObject *Matrix_median_scale_get(MatrixObject *self, void *UNUSED(closure))
 {
   float mat[3][3];
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   /*must be 3-4 cols, 3-4 rows, square matrix*/
   if ((self->num_row < 3) || (self->num_col < 3)) {
     PyErr_SetString(PyExc_AttributeError,
                     "Matrix.median_scale: "
                     "inappropriate matrix size, 3x3 minimum");
     return NULL;
   }
 
   matrix_as_3x3(mat, self);
 
   return PyFloat_FromDouble(mat3_to_scale(mat));
 }
 
 PyDoc_STRVAR(Matrix_is_negative_doc,
              "True if this matrix results in a negative scale, 3x3 and 4x4 only, "
              "(read-only).\n\n:type: bool");
 static PyObject *Matrix_is_negative_get(MatrixObject *self, void *UNUSED(closure))
 {
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   /*must be 3-4 cols, 3-4 rows, square matrix*/
   if (self->num_row == 4 && self->num_col == 4) {
     return PyBool_FromLong(is_negative_m4((float(*)[4])self->matrix));
   }
   else if (self->num_row == 3 && self->num_col == 3) {
     return PyBool_FromLong(is_negative_m3((float(*)[3])self->matrix));
   }
   else {
     PyErr_SetString(PyExc_AttributeError,
                     "Matrix.is_negative: "
                     "inappropriate matrix size - expects 3x3 or 4x4 matrix");
     return NULL;
   }
 }
 
 PyDoc_STRVAR(Matrix_is_orthogonal_doc,
              "True if this matrix is orthogonal, 3x3 and 4x4 only, (read-only).\n\n:type: bool");
 static PyObject *Matrix_is_orthogonal_get(MatrixObject *self, void *UNUSED(closure))
 {
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   /*must be 3-4 cols, 3-4 rows, square matrix*/
   if (self->num_row == 4 && self->num_col == 4) {
     return PyBool_FromLong(is_orthonormal_m4((float(*)[4])self->matrix));
   }
   else if (self->num_row == 3 && self->num_col == 3) {
     return PyBool_FromLong(is_orthonormal_m3((float(*)[3])self->matrix));
   }
   else {
     PyErr_SetString(PyExc_AttributeError,
                     "Matrix.is_orthogonal: "
                     "inappropriate matrix size - expects 3x3 or 4x4 matrix");
     return NULL;
   }
 }
 
 PyDoc_STRVAR(Matrix_is_orthogonal_axis_vectors_doc,
              "True if this matrix has got orthogonal axis vectors, 3x3 and 4x4 only, "
              "(read-only).\n\n:type: bool");
 static PyObject *Matrix_is_orthogonal_axis_vectors_get(MatrixObject *self, void *UNUSED(closure))
 {
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   /*must be 3-4 cols, 3-4 rows, square matrix*/
   if (self->num_row == 4 && self->num_col == 4) {
     return PyBool_FromLong(is_orthogonal_m4((float(*)[4])self->matrix));
   }
   else if (self->num_row == 3 && self->num_col == 3) {
     return PyBool_FromLong(is_orthogonal_m3((float(*)[3])self->matrix));
   }
   else {
     PyErr_SetString(PyExc_AttributeError,
                     "Matrix.is_orthogonal_axis_vectors: "
                     "inappropriate matrix size - expects 3x3 or 4x4 matrix");
     return NULL;
   }
 }
 
 /*****************************************************************************/
 /* Python attributes get/set structure:                                      */
 /*****************************************************************************/
 static PyGetSetDef Matrix_getseters[] = {
     {"median_scale", (getter)Matrix_median_scale_get, (setter)NULL, Matrix_median_scale_doc, NULL},
     {"translation",
      (getter)Matrix_translation_get,
      (setter)Matrix_translation_set,
      Matrix_translation_doc,
      NULL},
     {"row", (getter)Matrix_row_get, (setter)NULL, Matrix_row_doc, NULL},
     {"col", (getter)Matrix_col_get, (setter)NULL, Matrix_col_doc, NULL},
     {"is_negative", (getter)Matrix_is_negative_get, (setter)NULL, Matrix_is_negative_doc, NULL},
     {"is_orthogonal",
      (getter)Matrix_is_orthogonal_get,
      (setter)NULL,
      Matrix_is_orthogonal_doc,
      NULL},
     {"is_orthogonal_axis_vectors",
      (getter)Matrix_is_orthogonal_axis_vectors_get,
      (setter)NULL,
      Matrix_is_orthogonal_axis_vectors_doc,
      NULL},
     {"is_wrapped",
      (getter)BaseMathObject_is_wrapped_get,
      (setter)NULL,
      BaseMathObject_is_wrapped_doc,
      NULL},
     {"is_frozen",
      (getter)BaseMathObject_is_frozen_get,
      (setter)NULL,
      BaseMathObject_is_frozen_doc,
      NULL},
     {"owner", (getter)BaseMathObject_owner_get, (setter)NULL, BaseMathObject_owner_doc, NULL},
     {NULL, NULL, NULL, NULL, NULL} /* Sentinel */
 };
 
 /*-----------------------METHOD DEFINITIONS ----------------------*/
 static struct PyMethodDef Matrix_methods[] = {
     /* derived values */
     {"determinant", (PyCFunction)Matrix_determinant, METH_NOARGS, Matrix_determinant_doc},
     {"decompose", (PyCFunction)Matrix_decompose, METH_NOARGS, Matrix_decompose_doc},
 
     /* in place only */
     {"zero", (PyCFunction)Matrix_zero, METH_NOARGS, Matrix_zero_doc},
     {"identity", (PyCFunction)Matrix_identity, METH_NOARGS, Matrix_identity_doc},
 
     /* operate on original or copy */
     {"transpose", (PyCFunction)Matrix_transpose, METH_NOARGS, Matrix_transpose_doc},
     {"transposed", (PyCFunction)Matrix_transposed, METH_NOARGS, Matrix_transposed_doc},
     {"normalize", (PyCFunction)Matrix_normalize, METH_NOARGS, Matrix_normalize_doc},
     {"normalized", (PyCFunction)Matrix_normalized, METH_NOARGS, Matrix_normalized_doc},
     {"invert", (PyCFunction)Matrix_invert, METH_VARARGS, Matrix_invert_doc},
     {"inverted", (PyCFunction)Matrix_inverted, METH_VARARGS, Matrix_inverted_doc},
     {"invert_safe", (PyCFunction)Matrix_invert_safe, METH_NOARGS, Matrix_invert_safe_doc},
     {"inverted_safe", (PyCFunction)Matrix_inverted_safe, METH_NOARGS, Matrix_inverted_safe_doc},
     {"adjugate", (PyCFunction)Matrix_adjugate, METH_NOARGS, Matrix_adjugate_doc},
     {"adjugated", (PyCFunction)Matrix_adjugated, METH_NOARGS, Matrix_adjugated_doc},
     {"to_2x2", (PyCFunction)Matrix_to_2x2, METH_NOARGS, Matrix_to_2x2_doc},
     {"to_3x3", (PyCFunction)Matrix_to_3x3, METH_NOARGS, Matrix_to_3x3_doc},
     {"to_4x4", (PyCFunction)Matrix_to_4x4, METH_NOARGS, Matrix_to_4x4_doc},
     /* TODO. {"resize_3x3", (PyCFunction) Matrix_resize3x3, METH_NOARGS, Matrix_resize3x3_doc}, */
     {"resize_4x4", (PyCFunction)Matrix_resize_4x4, METH_NOARGS, Matrix_resize_4x4_doc},
     {"rotate", (PyCFunction)Matrix_rotate, METH_O, Matrix_rotate_doc},
 
     /* return converted representation */
     {"to_euler", (PyCFunction)Matrix_to_euler, METH_VARARGS, Matrix_to_euler_doc},
     {"to_quaternion", (PyCFunction)Matrix_to_quaternion, METH_NOARGS, Matrix_to_quaternion_doc},
     {"to_scale", (PyCFunction)Matrix_to_scale, METH_NOARGS, Matrix_to_scale_doc},
     {"to_translation", (PyCFunction)Matrix_to_translation, METH_NOARGS, Matrix_to_translation_doc},
 
     /* operation between 2 or more types  */
     {"lerp", (PyCFunction)Matrix_lerp, METH_VARARGS, Matrix_lerp_doc},
     {"copy", (PyCFunction)Matrix_copy, METH_NOARGS, Matrix_copy_doc},
     {"__copy__", (PyCFunction)Matrix_copy, METH_NOARGS, Matrix_copy_doc},
     {"__deepcopy__", (PyCFunction)Matrix_deepcopy, METH_VARARGS, Matrix_copy_doc},
 
     /* base-math methods */
     {"freeze", (PyCFunction)BaseMathObject_freeze, METH_NOARGS, BaseMathObject_freeze_doc},
 
     /* class methods */
     {"Identity", (PyCFunction)C_Matrix_Identity, METH_VARARGS | METH_CLASS, C_Matrix_Identity_doc},
     {"Rotation", (PyCFunction)C_Matrix_Rotation, METH_VARARGS | METH_CLASS, C_Matrix_Rotation_doc},
     {"Scale", (PyCFunction)C_Matrix_Scale, METH_VARARGS | METH_CLASS, C_Matrix_Scale_doc},
     {"Shear", (PyCFunction)C_Matrix_Shear, METH_VARARGS | METH_CLASS, C_Matrix_Shear_doc},
     {"Diagonal", (PyCFunction)C_Matrix_Diagonal, METH_O | METH_CLASS, C_Matrix_Diagonal_doc},
     {"Translation",
      (PyCFunction)C_Matrix_Translation,
      METH_O | METH_CLASS,
      C_Matrix_Translation_doc},
     {"OrthoProjection",
      (PyCFunction)C_Matrix_OrthoProjection,
      METH_VARARGS | METH_CLASS,
      C_Matrix_OrthoProjection_doc},
     {NULL, NULL, 0, NULL},
 };
 
 /*------------------PY_OBECT DEFINITION--------------------------*/
 PyDoc_STRVAR(
     matrix_doc,
     ".. class:: Matrix([rows])\n"
     "\n"
     "   This object gives access to Matrices in Blender, supporting square and rectangular\n"
     "   matrices from 2x2 up to 4x4.\n"
     "\n"
     "   :param rows: Sequence of rows.\n"
     "      When omitted, a 4x4 identity matrix is constructed.\n"
     "   :type rows: 2d number sequence\n");
 PyTypeObject matrix_Type = {
     PyVarObject_HEAD_INIT(NULL, 0) "Matrix", /*tp_name*/
     sizeof(MatrixObject),                    /*tp_basicsize*/
     0,                                       /*tp_itemsize*/
     (destructor)BaseMathObject_dealloc,      /*tp_dealloc*/
     (printfunc)NULL,                         /*tp_print*/
     NULL,                                    /*tp_getattr*/
     NULL,                                    /*tp_setattr*/
     NULL,                                    /*tp_compare*/
     (reprfunc)Matrix_repr,                   /*tp_repr*/
     &Matrix_NumMethods,                      /*tp_as_number*/
     &Matrix_SeqMethods,                      /*tp_as_sequence*/
     &Matrix_AsMapping,                       /*tp_as_mapping*/
     (hashfunc)Matrix_hash,                   /*tp_hash*/
     NULL,                                    /*tp_call*/
 #ifndef MATH_STANDALONE
     (reprfunc)Matrix_str, /*tp_str*/
 #else
     NULL, /*tp_str*/
 #endif
     NULL,                                                          /*tp_getattro*/
     NULL,                                                          /*tp_setattro*/
     NULL,                                                          /*tp_as_buffer*/
     Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, /*tp_flags*/
     matrix_doc,                                                    /*tp_doc*/
     (traverseproc)BaseMathObject_traverse,                         /* tp_traverse */
     (inquiry)BaseMathObject_clear,                                 /*tp_clear*/
     (richcmpfunc)Matrix_richcmpr,                                  /*tp_richcompare*/
     0,                                                             /*tp_weaklistoffset*/
     NULL,                                                          /*tp_iter*/
     NULL,                                                          /*tp_iternext*/
     Matrix_methods,                                                /*tp_methods*/
     NULL,                                                          /*tp_members*/
     Matrix_getseters,                                              /*tp_getset*/
     NULL,                                                          /*tp_base*/
     NULL,                                                          /*tp_dict*/
     NULL,                                                          /*tp_descr_get*/
     NULL,                                                          /*tp_descr_set*/
     0,                                                             /*tp_dictoffset*/
     NULL,                                                          /*tp_init*/
     NULL,                                                          /*tp_alloc*/
     Matrix_new,                                                    /*tp_new*/
     NULL,                                                          /*tp_free*/
     NULL,                                                          /*tp_is_gc*/
     NULL,                                                          /*tp_bases*/
     NULL,                                                          /*tp_mro*/
     NULL,                                                          /*tp_cache*/
     NULL,                                                          /*tp_subclasses*/
     NULL,                                                          /*tp_weaklist*/
     NULL,                                                          /*tp_del*/
 };
 
 PyObject *Matrix_CreatePyObject(const float *mat,
                                 const ushort num_col,
                                 const ushort num_row,
                                 PyTypeObject *base_type)
 {
   MatrixObject *self;
   float *mat_alloc;
 
   /* matrix objects can be any 2-4row x 2-4col matrix */
   if (num_col < 2 || num_col > 4 || num_row < 2 || num_row > 4) {
     PyErr_SetString(PyExc_RuntimeError,
                     "Matrix(): "
                     "row and column sizes must be between 2 and 4");
     return NULL;
   }
 
   mat_alloc = PyMem_Malloc(num_col * num_row * sizeof(float));
   if (UNLIKELY(mat_alloc == NULL)) {
     PyErr_SetString(PyExc_MemoryError,
                     "Matrix(): "
                     "problem allocating data");
     return NULL;
   }
 
   self = BASE_MATH_NEW(MatrixObject, matrix_Type, base_type);
   if (self) {
     self->matrix = mat_alloc;
     self->num_col = num_col;
     self->num_row = num_row;
 
     /* init callbacks as NULL */
     self->cb_user = NULL;
     self->cb_type = self->cb_subtype = 0;
 
     if (mat) { /*if a float array passed*/
       memcpy(self->matrix, mat, num_col * num_row * sizeof(float));
     }
     else if (num_col == num_row) {
       /* or if no arguments are passed return identity matrix for square matrices */
       matrix_identity_internal(self);
     }
     else {
       /* otherwise zero everything */
       memset(self->matrix, 0, num_col * num_row * sizeof(float));
     }
     self->flag = BASE_MATH_FLAG_DEFAULT;
   }
   else {
     PyMem_Free(mat_alloc);
   }
 
   return (PyObject *)self;
 }
 
 PyObject *Matrix_CreatePyObject_wrap(float *mat,
                                      const ushort num_col,
                                      const ushort num_row,
                                      PyTypeObject *base_type)
 {
   MatrixObject *self;
 
   /* matrix objects can be any 2-4row x 2-4col matrix */
   if (num_col < 2 || num_col > 4 || num_row < 2 || num_row > 4) {
     PyErr_SetString(PyExc_RuntimeError,
                     "Matrix(): "
                     "row and column sizes must be between 2 and 4");
     return NULL;
   }
 
   self = BASE_MATH_NEW(MatrixObject, matrix_Type, base_type);
   if (self) {
     self->num_col = num_col;
     self->num_row = num_row;
 
     /* init callbacks as NULL */
     self->cb_user = NULL;
     self->cb_type = self->cb_subtype = 0;
 
     self->matrix = mat;
     self->flag = BASE_MATH_FLAG_DEFAULT | BASE_MATH_FLAG_IS_WRAP;
   }
   return (PyObject *)self;
 }
 
 PyObject *Matrix_CreatePyObject_cb(
     PyObject *cb_user, const ushort num_col, const ushort num_row, uchar cb_type, uchar cb_subtype)
 {
   MatrixObject *self = (MatrixObject *)Matrix_CreatePyObject(NULL, num_col, num_row, NULL);
   if (self) {
     Py_INCREF(cb_user);
     self->cb_user = cb_user;
     self->cb_type = cb_type;
     self->cb_subtype = cb_subtype;
     PyObject_GC_Track(self);
   }
   return (PyObject *)self;
 }
 
 /**
  * \param mat: Initialized matrix value to use in-place, allocated with #PyMem_Malloc
  */
 PyObject *Matrix_CreatePyObject_alloc(float *mat,
                                       const ushort num_col,
                                       const ushort num_row,
                                       PyTypeObject *base_type)
 {
   MatrixObject *self;
   self = (MatrixObject *)Matrix_CreatePyObject_wrap(mat, num_col, num_row, base_type);
   if (self) {
     self->flag &= ~BASE_MATH_FLAG_IS_WRAP;
   }
 
   return (PyObject *)self;
 }
 
 /**
  * Use with PyArg_ParseTuple's "O&" formatting.
  */
 static bool Matrix_ParseCheck(MatrixObject *pymat)
 {
   if (!MatrixObject_Check(pymat)) {
     PyErr_Format(
         PyExc_TypeError, "expected a mathutils.Matrix, not a %.200s", Py_TYPE(pymat)->tp_name);
     return 0;
   }
   /* sets error */
   if (BaseMath_ReadCallback(pymat) == -1) {
     return 0;
   }
   return 1;
 }
 
 int Matrix_ParseAny(PyObject *o, void *p)
 {
   MatrixObject **pymat_p = p;
   MatrixObject *pymat = (MatrixObject *)o;
 
   if (!Matrix_ParseCheck(pymat)) {
     return 0;
   }
   *pymat_p = pymat;
   return 1;
 }
 
 int Matrix_Parse2x2(PyObject *o, void *p)
 {
   MatrixObject **pymat_p = p;
   MatrixObject *pymat = (MatrixObject *)o;
 
   if (!Matrix_ParseCheck(pymat)) {
     return 0;
   }
   if ((pymat->num_col != 2) || (pymat->num_row != 2)) {
     PyErr_SetString(PyExc_ValueError, "matrix must be 2x2");
     return 0;
   }
 
   *pymat_p = pymat;
   return 1;
 }
 
 int Matrix_Parse3x3(PyObject *o, void *p)
 {
   MatrixObject **pymat_p = p;
   MatrixObject *pymat = (MatrixObject *)o;
 
   if (!Matrix_ParseCheck(pymat)) {
     return 0;
   }
   if ((pymat->num_col != 3) || (pymat->num_row != 3)) {
     PyErr_SetString(PyExc_ValueError, "matrix must be 3x3");
     return 0;
   }
 
   *pymat_p = pymat;
   return 1;
 }
 
 int Matrix_Parse4x4(PyObject *o, void *p)
 {
   MatrixObject **pymat_p = p;
   MatrixObject *pymat = (MatrixObject *)o;
 
   if (!Matrix_ParseCheck(pymat)) {
     return 0;
   }
   if ((pymat->num_col != 4) || (pymat->num_row != 4)) {
     PyErr_SetString(PyExc_ValueError, "matrix must be 4x4");
     return 0;
   }
 
   *pymat_p = pymat;
   return 1;
 }
 
 /* ----------------------------------------------------------------------------
  * special type for alternate access */
 
 typedef struct {
   PyObject_HEAD /* required python macro   */
       MatrixObject *matrix_user;
   eMatrixAccess_t type;
 } MatrixAccessObject;
 
 static int MatrixAccess_traverse(MatrixAccessObject *self, visitproc visit, void *arg)
 {
   Py_VISIT(self->matrix_user);
   return 0;
 }
 
 static int MatrixAccess_clear(MatrixAccessObject *self)
 {
   Py_CLEAR(self->matrix_user);
   return 0;
 }
 
 static void MatrixAccess_dealloc(MatrixAccessObject *self)
 {
   if (self->matrix_user) {
     PyObject_GC_UnTrack(self);
     MatrixAccess_clear(self);
   }
 
   Py_TYPE(self)->tp_free(self);
 }
 
 /* sequence access */
 
 static int MatrixAccess_len(MatrixAccessObject *self)
 {
   return (self->type == MAT_ACCESS_ROW) ? self->matrix_user->num_row : self->matrix_user->num_col;
 }
 
 static PyObject *MatrixAccess_slice(MatrixAccessObject *self, int begin, int end)
 {
   PyObject *tuple;
   int count;
 
   /* row/col access */
   MatrixObject *matrix_user = self->matrix_user;
   int matrix_access_len;
   PyObject *(*Matrix_item_new)(MatrixObject *, int);
 
   if (self->type == MAT_ACCESS_ROW) {
     matrix_access_len = matrix_user->num_row;
     Matrix_item_new = Matrix_item_row;
   }
   else { /* MAT_ACCESS_ROW */
     matrix_access_len = matrix_user->num_col;
     Matrix_item_new = Matrix_item_col;
   }
 
   CLAMP(begin, 0, matrix_access_len);
   if (end < 0) {
     end = (matrix_access_len + 1) + end;
   }
   CLAMP(end, 0, matrix_access_len);
   begin = MIN2(begin, end);
 
   tuple = PyTuple_New(end - begin);
   for (count = begin; count < end; count++) {
     PyTuple_SET_ITEM(tuple, count - begin, Matrix_item_new(matrix_user, count));
   }
 
   return tuple;
 }
 
 static PyObject *MatrixAccess_subscript(MatrixAccessObject *self, PyObject *item)
 {
   MatrixObject *matrix_user = self->matrix_user;
 
   if (PyIndex_Check(item)) {
     Py_ssize_t i;
     i = PyNumber_AsSsize_t(item, PyExc_IndexError);
     if (i == -1 && PyErr_Occurred()) {
       return NULL;
     }
     if (self->type == MAT_ACCESS_ROW) {
       if (i < 0) {
         i += matrix_user->num_row;
       }
       return Matrix_item_row(matrix_user, i);
     }
     else { /* MAT_ACCESS_ROW */
       if (i < 0) {
         i += matrix_user->num_col;
       }
       return Matrix_item_col(matrix_user, i);
     }
   }
   else if (PySlice_Check(item)) {
     Py_ssize_t start, stop, step, slicelength;
 
     if (PySlice_GetIndicesEx(item, MatrixAccess_len(self), &start, &stop, &step, &slicelength) <
         0) {
       return NULL;
     }
 
     if (slicelength <= 0) {
       return PyTuple_New(0);
     }
     else if (step == 1) {
       return MatrixAccess_slice(self, start, stop);
     }
     else {
       PyErr_SetString(PyExc_IndexError, "slice steps not supported with matrix accessors");
       return NULL;
     }
   }
   else {
     PyErr_Format(
         PyExc_TypeError, "matrix indices must be integers, not %.200s", Py_TYPE(item)->tp_name);
     return NULL;
   }
 }
 
 static int MatrixAccess_ass_subscript(MatrixAccessObject *self, PyObject *item, PyObject *value)
 {
   MatrixObject *matrix_user = self->matrix_user;
 
   if (PyIndex_Check(item)) {
     Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError);
     if (i == -1 && PyErr_Occurred()) {
       return -1;
     }
 
     if (self->type == MAT_ACCESS_ROW) {
       if (i < 0) {
         i += matrix_user->num_row;
       }
       return Matrix_ass_item_row(matrix_user, i, value);
     }
     else { /* MAT_ACCESS_ROW */
       if (i < 0) {
         i += matrix_user->num_col;
       }
       return Matrix_ass_item_col(matrix_user, i, value);
     }
   }
   /* TODO, slice */
   else {
     PyErr_Format(
         PyExc_TypeError, "matrix indices must be integers, not %.200s", Py_TYPE(item)->tp_name);
     return -1;
   }
 }
 
 static PyObject *MatrixAccess_iter(MatrixAccessObject *self)
 {
   /* Try get values from a collection */
   PyObject *ret;
   PyObject *iter = NULL;
   ret = MatrixAccess_slice(self, 0, MATRIX_MAX_DIM);
 
   /* we know this is a tuple so no need to PyIter_Check
    * otherwise it could be NULL (unlikely) if conversion failed */
   if (ret) {
     iter = PyObject_GetIter(ret);
     Py_DECREF(ret);
   }
 
   return iter;
 }
 
 static PyMappingMethods MatrixAccess_AsMapping = {
     (lenfunc)MatrixAccess_len,
     (binaryfunc)MatrixAccess_subscript,
     (objobjargproc)MatrixAccess_ass_subscript,
 };
 
 PyTypeObject matrix_access_Type = {
     PyVarObject_HEAD_INIT(NULL, 0) "MatrixAccess",           /*tp_name*/
     sizeof(MatrixAccessObject),                              /*tp_basicsize*/
     0,                                                       /*tp_itemsize*/
     (destructor)MatrixAccess_dealloc,                        /*tp_dealloc*/
     (printfunc)NULL,                                         /*tp_print*/
     NULL,                                                    /*tp_getattr*/
     NULL,                                                    /*tp_setattr*/
     NULL,                                                    /*tp_compare*/
     NULL,                                                    /*tp_repr*/
     NULL,                                                    /*tp_as_number*/
     NULL /*&MatrixAccess_SeqMethods*/ /* TODO */,            /*tp_as_sequence*/
     &MatrixAccess_AsMapping,                                 /*tp_as_mapping*/
     NULL,                                                    /*tp_hash*/
     NULL,                                                    /*tp_call*/
     NULL,                                                    /*tp_str*/
     NULL,                                                    /*tp_getattro*/
     NULL,                                                    /*tp_setattro*/
     NULL,                                                    /*tp_as_buffer*/
     Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,                 /*tp_flags*/
     NULL,                                                    /*tp_doc*/
     (traverseproc)MatrixAccess_traverse,                     /*tp_traverse*/
     (inquiry)MatrixAccess_clear,                             /*tp_clear*/
     NULL /* (richcmpfunc)MatrixAccess_richcmpr */ /* TODO*/, /*tp_richcompare*/
     0,                                                       /*tp_weaklistoffset*/
     (getiterfunc)MatrixAccess_iter,                          /* getiterfunc tp_iter; */
 };
 
 static PyObject *MatrixAccess_CreatePyObject(MatrixObject *matrix, const eMatrixAccess_t type)
 {
   MatrixAccessObject *matrix_access = (MatrixAccessObject *)PyObject_GC_New(MatrixObject,
                                                                             &matrix_access_Type);
 
   matrix_access->matrix_user = matrix;
   Py_INCREF(matrix);
 
   matrix_access->type = type;
 
   return (PyObject *)matrix_access;
 }
 
 /* end special access
  * -------------------------------------------------------------------------- */
diff --git a/source/blender/python/mathutils/mathutils_Quaternion.c b/source/blender/python/mathutils/mathutils_Quaternion.c
index 39d84c1ac96..7ce0ea5f249 100644
--- a/source/blender/python/mathutils/mathutils_Quaternion.c
+++ b/source/blender/python/mathutils/mathutils_Quaternion.c
@@ -1,1670 +1,1672 @@
 /*
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version 2
  * of the License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
 /** \file
  * \ingroup pymathutils
  */
 
 #include <Python.h>
 
 #include "mathutils.h"
 
 #include "BLI_math.h"
 #include "BLI_utildefines.h"
 
 #include "../generic/py_capi_utils.h"
 #include "../generic/python_utildefines.h"
 
 #ifndef MATH_STANDALONE
 #  include "BLI_dynstr.h"
 #endif
 
 #define QUAT_SIZE 4
 
-static PyObject *quat__apply_to_copy(PyNoArgsFunction quat_func, QuaternionObject *self);
+static PyObject *quat__apply_to_copy(PyObject *(*quat_func)(QuaternionObject *),
+                                     QuaternionObject *self);
 static void quat__axis_angle_sanitize(float axis[3], float *angle);
 static PyObject *Quaternion_copy(QuaternionObject *self);
 static PyObject *Quaternion_deepcopy(QuaternionObject *self, PyObject *args);
 
 /* -----------------------------METHODS------------------------------ */
 
 /* note: BaseMath_ReadCallback must be called beforehand */
 static PyObject *Quaternion_to_tuple_ext(QuaternionObject *self, int ndigits)
 {
   PyObject *ret;
   int i;
 
   ret = PyTuple_New(QUAT_SIZE);
 
   if (ndigits >= 0) {
     for (i = 0; i < QUAT_SIZE; i++) {
       PyTuple_SET_ITEM(ret, i, PyFloat_FromDouble(double_round((double)self->quat[i], ndigits)));
     }
   }
   else {
     for (i = 0; i < QUAT_SIZE; i++) {
       PyTuple_SET_ITEM(ret, i, PyFloat_FromDouble(self->quat[i]));
     }
   }
 
   return ret;
 }
 
 PyDoc_STRVAR(Quaternion_to_euler_doc,
              ".. method:: to_euler(order, euler_compat)\n"
              "\n"
              "   Return Euler representation of the quaternion.\n"
              "\n"
              "   :arg order: Optional rotation order argument in\n"
              "      ['XYZ', 'XZY', 'YXZ', 'YZX', 'ZXY', 'ZYX'].\n"
              "   :type order: string\n"
              "   :arg euler_compat: Optional euler argument the new euler will be made\n"
              "      compatible with (no axis flipping between them).\n"
              "      Useful for converting a series of matrices to animation curves.\n"
              "   :type euler_compat: :class:`Euler`\n"
              "   :return: Euler representation of the quaternion.\n"
              "   :rtype: :class:`Euler`\n");
 static PyObject *Quaternion_to_euler(QuaternionObject *self, PyObject *args)
 {
   float tquat[4];
   float eul[3];
   const char *order_str = NULL;
   short order = EULER_ORDER_XYZ;
   EulerObject *eul_compat = NULL;
 
   if (!PyArg_ParseTuple(args, "|sO!:to_euler", &order_str, &euler_Type, &eul_compat)) {
     return NULL;
   }
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if (order_str) {
     order = euler_order_from_string(order_str, "Matrix.to_euler()");
 
     if (order == -1) {
       return NULL;
     }
   }
 
   normalize_qt_qt(tquat, self->quat);
 
   if (eul_compat) {
     if (BaseMath_ReadCallback(eul_compat) == -1) {
       return NULL;
     }
 
     if (order == EULER_ORDER_XYZ) {
       quat_to_compatible_eul(eul, eul_compat->eul, tquat);
     }
     else {
       quat_to_compatible_eulO(eul, eul_compat->eul, order, tquat);
     }
   }
   else {
     if (order == EULER_ORDER_XYZ) {
       quat_to_eul(eul, tquat);
     }
     else {
       quat_to_eulO(eul, order, tquat);
     }
   }
 
   return Euler_CreatePyObject(eul, order, NULL);
 }
 
 PyDoc_STRVAR(Quaternion_to_matrix_doc,
              ".. method:: to_matrix()\n"
              "\n"
              "   Return a matrix representation of the quaternion.\n"
              "\n"
              "   :return: A 3x3 rotation matrix representation of the quaternion.\n"
              "   :rtype: :class:`Matrix`\n");
 static PyObject *Quaternion_to_matrix(QuaternionObject *self)
 {
   float mat[9]; /* all values are set */
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   quat_to_mat3((float(*)[3])mat, self->quat);
   return Matrix_CreatePyObject(mat, 3, 3, NULL);
 }
 
 PyDoc_STRVAR(Quaternion_to_axis_angle_doc,
              ".. method:: to_axis_angle()\n"
              "\n"
              "   Return the axis, angle representation of the quaternion.\n"
              "\n"
              "   :return: axis, angle.\n"
              "   :rtype: (:class:`Vector`, float) pair\n");
 static PyObject *Quaternion_to_axis_angle(QuaternionObject *self)
 {
   PyObject *ret;
 
   float tquat[4];
 
   float axis[3];
   float angle;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   normalize_qt_qt(tquat, self->quat);
   quat_to_axis_angle(axis, &angle, tquat);
 
   quat__axis_angle_sanitize(axis, &angle);
 
   ret = PyTuple_New(2);
   PyTuple_SET_ITEMS(ret, Vector_CreatePyObject(axis, 3, NULL), PyFloat_FromDouble(angle));
   return ret;
 }
 
 PyDoc_STRVAR(Quaternion_to_swing_twist_doc,
              ".. method:: to_swing_twist(axis)\n"
              "\n"
              "   Split the rotation into a swing quaternion with the specified\n"
              "   axis fixed at zero, and the remaining twist rotation angle.\n"
              "\n"
              "   :arg axis: twist axis as a string in ['X', 'Y', 'Z']\n"
              "   :return: swing, twist angle.\n"
              "   :rtype: (:class:`Quaternion`, float) pair\n");
 static PyObject *Quaternion_to_swing_twist(QuaternionObject *self, PyObject *axis_arg)
 {
   PyObject *ret;
 
   const char *axis_str = NULL;
   float swing[4], twist;
   int axis;
 
   if (axis_arg && PyUnicode_Check(axis_arg)) {
     axis_str = _PyUnicode_AsString(axis_arg);
   }
 
   if (axis_str && axis_str[0] >= 'X' && axis_str[0] <= 'Z' && axis_str[1] == 0) {
     axis = axis_str[0] - 'X';
   }
   else {
     PyErr_SetString(PyExc_ValueError,
                     "Quaternion.to_swing_twist(): "
                     "the axis argument must be "
                     "a string in 'X', 'Y', 'Z'");
     return NULL;
   }
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   twist = quat_split_swing_and_twist(self->quat, axis, swing, NULL);
 
   ret = PyTuple_New(2);
   PyTuple_SET_ITEMS(
       ret, Quaternion_CreatePyObject(swing, Py_TYPE(self)), PyFloat_FromDouble(twist));
   return ret;
 }
 
 PyDoc_STRVAR(
     Quaternion_to_exponential_map_doc,
     ".. method:: to_exponential_map()\n"
     "\n"
     "   Return the exponential map representation of the quaternion.\n"
     "\n"
     "   This representation consist of the rotation axis multiplied by the rotation angle.\n"
     "   Such a representation is useful for interpolation between multiple orientations.\n"
     "\n"
     "   :return: exponential map.\n"
     "   :rtype: :class:`Vector` of size 3\n"
     "\n"
     "   To convert back to a quaternion, pass it to the :class:`Quaternion` constructor.\n");
 static PyObject *Quaternion_to_exponential_map(QuaternionObject *self)
 {
   float expmap[3];
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   quat_to_expmap(expmap, self->quat);
   return Vector_CreatePyObject(expmap, 3, NULL);
 }
 
 PyDoc_STRVAR(Quaternion_cross_doc,
              ".. method:: cross(other)\n"
              "\n"
              "   Return the cross product of this quaternion and another.\n"
              "\n"
              "   :arg other: The other quaternion to perform the cross product with.\n"
              "   :type other: :class:`Quaternion`\n"
              "   :return: The cross product.\n"
              "   :rtype: :class:`Quaternion`\n");
 static PyObject *Quaternion_cross(QuaternionObject *self, PyObject *value)
 {
   float quat[QUAT_SIZE], tquat[QUAT_SIZE];
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if (mathutils_array_parse(
           tquat, QUAT_SIZE, QUAT_SIZE, value, "Quaternion.cross(other), invalid 'other' arg") ==
       -1) {
     return NULL;
   }
 
   mul_qt_qtqt(quat, self->quat, tquat);
   return Quaternion_CreatePyObject(quat, Py_TYPE(self));
 }
 
 PyDoc_STRVAR(Quaternion_dot_doc,
              ".. method:: dot(other)\n"
              "\n"
              "   Return the dot product of this quaternion and another.\n"
              "\n"
              "   :arg other: The other quaternion to perform the dot product with.\n"
              "   :type other: :class:`Quaternion`\n"
              "   :return: The dot product.\n"
              "   :rtype: float\n");
 static PyObject *Quaternion_dot(QuaternionObject *self, PyObject *value)
 {
   float tquat[QUAT_SIZE];
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if (mathutils_array_parse(
           tquat, QUAT_SIZE, QUAT_SIZE, value, "Quaternion.dot(other), invalid 'other' arg") ==
       -1) {
     return NULL;
   }
 
   return PyFloat_FromDouble(dot_qtqt(self->quat, tquat));
 }
 
 PyDoc_STRVAR(Quaternion_rotation_difference_doc,
              ".. function:: rotation_difference(other)\n"
              "\n"
              "   Returns a quaternion representing the rotational difference.\n"
              "\n"
              "   :arg other: second quaternion.\n"
              "   :type other: :class:`Quaternion`\n"
              "   :return: the rotational difference between the two quat rotations.\n"
              "   :rtype: :class:`Quaternion`\n");
 static PyObject *Quaternion_rotation_difference(QuaternionObject *self, PyObject *value)
 {
   float tquat[QUAT_SIZE], quat[QUAT_SIZE];
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if (mathutils_array_parse(tquat,
                             QUAT_SIZE,
                             QUAT_SIZE,
                             value,
                             "Quaternion.difference(other), invalid 'other' arg") == -1) {
     return NULL;
   }
 
   rotation_between_quats_to_quat(quat, self->quat, tquat);
 
   return Quaternion_CreatePyObject(quat, Py_TYPE(self));
 }
 
 PyDoc_STRVAR(Quaternion_slerp_doc,
              ".. function:: slerp(other, factor)\n"
              "\n"
              "   Returns the interpolation of two quaternions.\n"
              "\n"
              "   :arg other: value to interpolate with.\n"
              "   :type other: :class:`Quaternion`\n"
              "   :arg factor: The interpolation value in [0.0, 1.0].\n"
              "   :type factor: float\n"
              "   :return: The interpolated rotation.\n"
              "   :rtype: :class:`Quaternion`\n");
 static PyObject *Quaternion_slerp(QuaternionObject *self, PyObject *args)
 {
   PyObject *value;
   float tquat[QUAT_SIZE], quat[QUAT_SIZE], fac;
 
   if (!PyArg_ParseTuple(args, "Of:slerp", &value, &fac)) {
     PyErr_SetString(PyExc_TypeError,
                     "quat.slerp(): "
                     "expected Quaternion types and float");
     return NULL;
   }
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if (mathutils_array_parse(
           tquat, QUAT_SIZE, QUAT_SIZE, value, "Quaternion.slerp(other), invalid 'other' arg") ==
       -1) {
     return NULL;
   }
 
   if (fac > 1.0f || fac < 0.0f) {
     PyErr_SetString(PyExc_ValueError,
                     "quat.slerp(): "
                     "interpolation factor must be between 0.0 and 1.0");
     return NULL;
   }
 
   interp_qt_qtqt(quat, self->quat, tquat, fac);
 
   return Quaternion_CreatePyObject(quat, Py_TYPE(self));
 }
 
 PyDoc_STRVAR(Quaternion_rotate_doc,
              ".. method:: rotate(other)\n"
              "\n"
              "   Rotates the quaternion by another mathutils value.\n"
              "\n"
              "   :arg other: rotation component of mathutils value\n"
              "   :type other: :class:`Euler`, :class:`Quaternion` or :class:`Matrix`\n");
 static PyObject *Quaternion_rotate(QuaternionObject *self, PyObject *value)
 {
   float self_rmat[3][3], other_rmat[3][3], rmat[3][3];
   float tquat[4], length;
 
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return NULL;
   }
 
   if (mathutils_any_to_rotmat(other_rmat, value, "Quaternion.rotate(value)") == -1) {
     return NULL;
   }
 
   length = normalize_qt_qt(tquat, self->quat);
   quat_to_mat3(self_rmat, tquat);
   mul_m3_m3m3(rmat, other_rmat, self_rmat);
 
   mat3_to_quat(self->quat, rmat);
   mul_qt_fl(self->quat, length); /* maintain length after rotating */
 
   (void)BaseMath_WriteCallback(self);
   Py_RETURN_NONE;
 }
 
 PyDoc_STRVAR(Quaternion_make_compatible_doc,
              ".. method:: make_compatible(other)\n"
              "\n"
              "   Make this quaternion compatible with another,\n"
              "   so interpolating between them works as intended.\n");
 static PyObject *Quaternion_make_compatible(QuaternionObject *self, PyObject *value)
 {
   float quat[QUAT_SIZE];
   float tquat[QUAT_SIZE];
 
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return NULL;
   }
 
   if (mathutils_array_parse(tquat,
                             QUAT_SIZE,
                             QUAT_SIZE,
                             value,
                             "Quaternion.make_compatible(other), invalid 'other' arg") == -1) {
     return NULL;
   }
 
   /* Can only operate on unit length quaternions. */
   const float quat_len = normalize_qt_qt(quat, self->quat);
   quat_to_compatible_quat(self->quat, quat, tquat);
   mul_qt_fl(self->quat, quat_len);
 
   (void)BaseMath_WriteCallback(self);
 
   Py_RETURN_NONE;
 }
 
 /* ----------------------------Quaternion.normalize()---------------- */
 /* Normalize the quaternion. This may change the angle as well as the
  * rotation axis, as all of (w, x, y, z) are scaled. */
 PyDoc_STRVAR(Quaternion_normalize_doc,
              ".. function:: normalize()\n"
              "\n"
              "   Normalize the quaternion.\n");
 static PyObject *Quaternion_normalize(QuaternionObject *self)
 {
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return NULL;
   }
 
   normalize_qt(self->quat);
 
   (void)BaseMath_WriteCallback(self);
   Py_RETURN_NONE;
 }
 PyDoc_STRVAR(Quaternion_normalized_doc,
              ".. function:: normalized()\n"
              "\n"
              "   Return a new normalized quaternion.\n"
              "\n"
              "   :return: a normalized copy.\n"
              "   :rtype: :class:`Quaternion`\n");
 static PyObject *Quaternion_normalized(QuaternionObject *self)
 {
-  return quat__apply_to_copy((PyNoArgsFunction)Quaternion_normalize, self);
+  return quat__apply_to_copy(Quaternion_normalize, self);
 }
 
 PyDoc_STRVAR(Quaternion_invert_doc,
              ".. function:: invert()\n"
              "\n"
              "   Set the quaternion to its inverse.\n");
 static PyObject *Quaternion_invert(QuaternionObject *self)
 {
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return NULL;
   }
 
   invert_qt(self->quat);
 
   (void)BaseMath_WriteCallback(self);
   Py_RETURN_NONE;
 }
 PyDoc_STRVAR(Quaternion_inverted_doc,
              ".. function:: inverted()\n"
              "\n"
              "   Return a new, inverted quaternion.\n"
              "\n"
              "   :return: the inverted value.\n"
              "   :rtype: :class:`Quaternion`\n");
 static PyObject *Quaternion_inverted(QuaternionObject *self)
 {
-  return quat__apply_to_copy((PyNoArgsFunction)Quaternion_invert, self);
+  return quat__apply_to_copy(Quaternion_invert, self);
 }
 
 PyDoc_STRVAR(Quaternion_identity_doc,
              ".. function:: identity()\n"
              "\n"
              "   Set the quaternion to an identity quaternion.\n"
              "\n"
              "   :rtype: :class:`Quaternion`\n");
 static PyObject *Quaternion_identity(QuaternionObject *self)
 {
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return NULL;
   }
 
   unit_qt(self->quat);
 
   (void)BaseMath_WriteCallback(self);
   Py_RETURN_NONE;
 }
 
 PyDoc_STRVAR(Quaternion_negate_doc,
              ".. function:: negate()\n"
              "\n"
              "   Set the quaternion to its negative.\n"
              "\n"
              "   :rtype: :class:`Quaternion`\n");
 static PyObject *Quaternion_negate(QuaternionObject *self)
 {
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return NULL;
   }
 
   mul_qt_fl(self->quat, -1.0f);
 
   (void)BaseMath_WriteCallback(self);
   Py_RETURN_NONE;
 }
 
 PyDoc_STRVAR(Quaternion_conjugate_doc,
              ".. function:: conjugate()\n"
              "\n"
              "   Set the quaternion to its conjugate (negate x, y, z).\n");
 static PyObject *Quaternion_conjugate(QuaternionObject *self)
 {
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return NULL;
   }
 
   conjugate_qt(self->quat);
 
   (void)BaseMath_WriteCallback(self);
   Py_RETURN_NONE;
 }
 PyDoc_STRVAR(Quaternion_conjugated_doc,
              ".. function:: conjugated()\n"
              "\n"
              "   Return a new conjugated quaternion.\n"
              "\n"
              "   :return: a new quaternion.\n"
              "   :rtype: :class:`Quaternion`\n");
 static PyObject *Quaternion_conjugated(QuaternionObject *self)
 {
-  return quat__apply_to_copy((PyNoArgsFunction)Quaternion_conjugate, self);
+  return quat__apply_to_copy(Quaternion_conjugate, self);
 }
 
 PyDoc_STRVAR(Quaternion_copy_doc,
              ".. function:: copy()\n"
              "\n"
              "   Returns a copy of this quaternion.\n"
              "\n"
              "   :return: A copy of the quaternion.\n"
              "   :rtype: :class:`Quaternion`\n"
              "\n"
              "   .. note:: use this to get a copy of a wrapped quaternion with\n"
              "      no reference to the original data.\n");
 static PyObject *Quaternion_copy(QuaternionObject *self)
 {
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   return Quaternion_CreatePyObject(self->quat, Py_TYPE(self));
 }
 static PyObject *Quaternion_deepcopy(QuaternionObject *self, PyObject *args)
 {
   if (!PyC_CheckArgs_DeepCopy(args)) {
     return NULL;
   }
   return Quaternion_copy(self);
 }
 
 /* print the object to screen */
 static PyObject *Quaternion_repr(QuaternionObject *self)
 {
   PyObject *ret, *tuple;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   tuple = Quaternion_to_tuple_ext(self, -1);
 
   ret = PyUnicode_FromFormat("Quaternion(%R)", tuple);
 
   Py_DECREF(tuple);
   return ret;
 }
 
 #ifndef MATH_STANDALONE
 static PyObject *Quaternion_str(QuaternionObject *self)
 {
   DynStr *ds;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   ds = BLI_dynstr_new();
 
   BLI_dynstr_appendf(ds,
                      "<Quaternion (w=%.4f, x=%.4f, y=%.4f, z=%.4f)>",
                      self->quat[0],
                      self->quat[1],
                      self->quat[2],
                      self->quat[3]);
 
   return mathutils_dynstr_to_py(ds); /* frees ds */
 }
 #endif
 
 static PyObject *Quaternion_richcmpr(PyObject *a, PyObject *b, int op)
 {
   PyObject *res;
   int ok = -1; /* zero is true */
 
   if (QuaternionObject_Check(a) && QuaternionObject_Check(b)) {
     QuaternionObject *quatA = (QuaternionObject *)a;
     QuaternionObject *quatB = (QuaternionObject *)b;
 
     if (BaseMath_ReadCallback(quatA) == -1 || BaseMath_ReadCallback(quatB) == -1) {
       return NULL;
     }
 
     ok = (EXPP_VectorsAreEqual(quatA->quat, quatB->quat, QUAT_SIZE, 1)) ? 0 : -1;
   }
 
   switch (op) {
     case Py_NE:
       ok = !ok;
       ATTR_FALLTHROUGH;
     case Py_EQ:
       res = ok ? Py_False : Py_True;
       break;
 
     case Py_LT:
     case Py_LE:
     case Py_GT:
     case Py_GE:
       res = Py_NotImplemented;
       break;
     default:
       PyErr_BadArgument();
       return NULL;
   }
 
   return Py_INCREF_RET(res);
 }
 
 static Py_hash_t Quaternion_hash(QuaternionObject *self)
 {
   if (BaseMath_ReadCallback(self) == -1) {
     return -1;
   }
 
   if (BaseMathObject_Prepare_ForHash(self) == -1) {
     return -1;
   }
 
   return mathutils_array_hash(self->quat, QUAT_SIZE);
 }
 
 /* ---------------------SEQUENCE PROTOCOLS------------------------ */
 /* ----------------------------len(object)------------------------ */
 /* sequence length */
 static int Quaternion_len(QuaternionObject *UNUSED(self))
 {
   return QUAT_SIZE;
 }
 /* ----------------------------object[]--------------------------- */
 /* sequence accessor (get) */
 static PyObject *Quaternion_item(QuaternionObject *self, int i)
 {
   if (i < 0) {
     i = QUAT_SIZE - i;
   }
 
   if (i < 0 || i >= QUAT_SIZE) {
     PyErr_SetString(PyExc_IndexError,
                     "quaternion[attribute]: "
                     "array index out of range");
     return NULL;
   }
 
   if (BaseMath_ReadIndexCallback(self, i) == -1) {
     return NULL;
   }
 
   return PyFloat_FromDouble(self->quat[i]);
 }
 /* ----------------------------object[]------------------------- */
 /* sequence accessor (set) */
 static int Quaternion_ass_item(QuaternionObject *self, int i, PyObject *ob)
 {
   float f;
 
   if (BaseMath_Prepare_ForWrite(self) == -1) {
     return -1;
   }
 
   f = (float)PyFloat_AsDouble(ob);
 
   if (f == -1.0f && PyErr_Occurred()) { /* parsed item not a number */
     PyErr_SetString(PyExc_TypeError,
                     "quaternion[index] = x: "
                     "assigned value not a number");
     return -1;
   }
 
   if (i < 0) {
     i = QUAT_SIZE - i;
   }
 
   if (i < 0 || i >= QUAT_SIZE) {
     PyErr_SetString(PyExc_IndexError,
                     "quaternion[attribute] = x: "
                     "array assignment index out of range");
     return -1;
   }
   self->quat[i] = f;
 
   if (BaseMath_WriteIndexCallback(self, i) == -1) {
     return -1;
   }
 
   return 0;
 }
 /* ----------------------------object[z:y]------------------------ */
 /* sequence slice (get) */
 static PyObject *Quaternion_slice(QuaternionObject *self, int begin, int end)
 {
   PyObject *tuple;
   int count;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   CLAMP(begin, 0, QUAT_SIZE);
   if (end < 0) {
     end = (QUAT_SIZE + 1) + end;
   }
   CLAMP(end, 0, QUAT_SIZE);
   begin = MIN2(begin, end);
 
   tuple = PyTuple_New(end - begin);
   for (count = begin; count < end; count++) {
     PyTuple_SET_ITEM(tuple, count - begin, PyFloat_FromDouble(self->quat[count]));
   }
 
   return tuple;
 }
 /* ----------------------------object[z:y]------------------------ */
 /* sequence slice (set) */
 static int Quaternion_ass_slice(QuaternionObject *self, int begin, int end, PyObject *seq)
 {
   int i, size;
   float quat[QUAT_SIZE];
 
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return -1;
   }
 
   CLAMP(begin, 0, QUAT_SIZE);
   if (end < 0) {
     end = (QUAT_SIZE + 1) + end;
   }
   CLAMP(end, 0, QUAT_SIZE);
   begin = MIN2(begin, end);
 
   if ((size = mathutils_array_parse(
            quat, 0, QUAT_SIZE, seq, "mathutils.Quaternion[begin:end] = []")) == -1) {
     return -1;
   }
 
   if (size != (end - begin)) {
     PyErr_SetString(PyExc_ValueError,
                     "quaternion[begin:end] = []: "
                     "size mismatch in slice assignment");
     return -1;
   }
 
   /* parsed well - now set in vector */
   for (i = 0; i < size; i++) {
     self->quat[begin + i] = quat[i];
   }
 
   (void)BaseMath_WriteCallback(self);
   return 0;
 }
 
 static PyObject *Quaternion_subscript(QuaternionObject *self, PyObject *item)
 {
   if (PyIndex_Check(item)) {
     Py_ssize_t i;
     i = PyNumber_AsSsize_t(item, PyExc_IndexError);
     if (i == -1 && PyErr_Occurred()) {
       return NULL;
     }
     if (i < 0) {
       i += QUAT_SIZE;
     }
     return Quaternion_item(self, i);
   }
   else if (PySlice_Check(item)) {
     Py_ssize_t start, stop, step, slicelength;
 
     if (PySlice_GetIndicesEx(item, QUAT_SIZE, &start, &stop, &step, &slicelength) < 0) {
       return NULL;
     }
 
     if (slicelength <= 0) {
       return PyTuple_New(0);
     }
     else if (step == 1) {
       return Quaternion_slice(self, start, stop);
     }
     else {
       PyErr_SetString(PyExc_IndexError, "slice steps not supported with quaternions");
       return NULL;
     }
   }
   else {
     PyErr_Format(PyExc_TypeError,
                  "quaternion indices must be integers, not %.200s",
                  Py_TYPE(item)->tp_name);
     return NULL;
   }
 }
 
 static int Quaternion_ass_subscript(QuaternionObject *self, PyObject *item, PyObject *value)
 {
   if (PyIndex_Check(item)) {
     Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError);
     if (i == -1 && PyErr_Occurred()) {
       return -1;
     }
     if (i < 0) {
       i += QUAT_SIZE;
     }
     return Quaternion_ass_item(self, i, value);
   }
   else if (PySlice_Check(item)) {
     Py_ssize_t start, stop, step, slicelength;
 
     if (PySlice_GetIndicesEx(item, QUAT_SIZE, &start, &stop, &step, &slicelength) < 0) {
       return -1;
     }
 
     if (step == 1) {
       return Quaternion_ass_slice(self, start, stop, value);
     }
     else {
       PyErr_SetString(PyExc_IndexError, "slice steps not supported with quaternion");
       return -1;
     }
   }
   else {
     PyErr_Format(PyExc_TypeError,
                  "quaternion indices must be integers, not %.200s",
                  Py_TYPE(item)->tp_name);
     return -1;
   }
 }
 
 /* ------------------------NUMERIC PROTOCOLS---------------------- */
 /* ------------------------obj + obj------------------------------ */
 /* addition */
 static PyObject *Quaternion_add(PyObject *q1, PyObject *q2)
 {
   float quat[QUAT_SIZE];
   QuaternionObject *quat1 = NULL, *quat2 = NULL;
 
   if (!QuaternionObject_Check(q1) || !QuaternionObject_Check(q2)) {
     PyErr_Format(PyExc_TypeError,
                  "Quaternion addition: (%s + %s) "
                  "invalid type for this operation",
                  Py_TYPE(q1)->tp_name,
                  Py_TYPE(q2)->tp_name);
     return NULL;
   }
   quat1 = (QuaternionObject *)q1;
   quat2 = (QuaternionObject *)q2;
 
   if (BaseMath_ReadCallback(quat1) == -1 || BaseMath_ReadCallback(quat2) == -1) {
     return NULL;
   }
 
   add_qt_qtqt(quat, quat1->quat, quat2->quat, 1.0f);
   return Quaternion_CreatePyObject(quat, Py_TYPE(q1));
 }
 /* ------------------------obj - obj------------------------------ */
 /* subtraction */
 static PyObject *Quaternion_sub(PyObject *q1, PyObject *q2)
 {
   int x;
   float quat[QUAT_SIZE];
   QuaternionObject *quat1 = NULL, *quat2 = NULL;
 
   if (!QuaternionObject_Check(q1) || !QuaternionObject_Check(q2)) {
     PyErr_Format(PyExc_TypeError,
                  "Quaternion subtraction: (%s - %s) "
                  "invalid type for this operation",
                  Py_TYPE(q1)->tp_name,
                  Py_TYPE(q2)->tp_name);
     return NULL;
   }
 
   quat1 = (QuaternionObject *)q1;
   quat2 = (QuaternionObject *)q2;
 
   if (BaseMath_ReadCallback(quat1) == -1 || BaseMath_ReadCallback(quat2) == -1) {
     return NULL;
   }
 
   for (x = 0; x < QUAT_SIZE; x++) {
     quat[x] = quat1->quat[x] - quat2->quat[x];
   }
 
   return Quaternion_CreatePyObject(quat, Py_TYPE(q1));
 }
 
 static PyObject *quat_mul_float(QuaternionObject *quat, const float scalar)
 {
   float tquat[4];
   copy_qt_qt(tquat, quat->quat);
   mul_qt_fl(tquat, scalar);
   return Quaternion_CreatePyObject(tquat, Py_TYPE(quat));
 }
 
 /*------------------------obj * obj------------------------------
  * multiplication */
 static PyObject *Quaternion_mul(PyObject *q1, PyObject *q2)
 {
   float scalar;
   QuaternionObject *quat1 = NULL, *quat2 = NULL;
 
   if (QuaternionObject_Check(q1)) {
     quat1 = (QuaternionObject *)q1;
     if (BaseMath_ReadCallback(quat1) == -1) {
       return NULL;
     }
   }
   if (QuaternionObject_Check(q2)) {
     quat2 = (QuaternionObject *)q2;
     if (BaseMath_ReadCallback(quat2) == -1) {
       return NULL;
     }
   }
 
   if (quat1 && quat2) { /* QUAT * QUAT (element-wise product) */
 #ifdef USE_MATHUTILS_ELEM_MUL
     float quat[QUAT_SIZE];
     mul_vn_vnvn(quat, quat1->quat, quat2->quat, QUAT_SIZE);
     return Quaternion_CreatePyObject(quat, Py_TYPE(q1));
 #endif
   }
   /* the only case this can happen (for a supported type is "FLOAT * QUAT") */
   else if (quat2) { /* FLOAT * QUAT */
     if (((scalar = PyFloat_AsDouble(q1)) == -1.0f && PyErr_Occurred()) == 0) {
       return quat_mul_float(quat2, scalar);
     }
   }
   else if (quat1) { /* QUAT * FLOAT */
     if ((((scalar = PyFloat_AsDouble(q2)) == -1.0f && PyErr_Occurred()) == 0)) {
       return quat_mul_float(quat1, scalar);
     }
   }
 
   PyErr_Format(PyExc_TypeError,
                "Element-wise multiplication: "
                "not supported between '%.200s' and '%.200s' types",
                Py_TYPE(q1)->tp_name,
                Py_TYPE(q2)->tp_name);
   return NULL;
 }
 /*------------------------obj *= obj------------------------------
  * in-place multiplication */
 static PyObject *Quaternion_imul(PyObject *q1, PyObject *q2)
 {
   float scalar;
   QuaternionObject *quat1 = NULL, *quat2 = NULL;
 
   if (QuaternionObject_Check(q1)) {
     quat1 = (QuaternionObject *)q1;
     if (BaseMath_ReadCallback(quat1) == -1) {
       return NULL;
     }
   }
   if (QuaternionObject_Check(q2)) {
     quat2 = (QuaternionObject *)q2;
     if (BaseMath_ReadCallback(quat2) == -1) {
       return NULL;
     }
   }
 
   if (quat1 && quat2) { /* QUAT *= QUAT (inplace element-wise product) */
 #ifdef USE_MATHUTILS_ELEM_MUL
     mul_vn_vn(quat1->quat, quat2->quat, QUAT_SIZE);
 #else
     PyErr_Format(PyExc_TypeError,
                  "In place element-wise multiplication: "
                  "not supported between '%.200s' and '%.200s' types",
                  Py_TYPE(q1)->tp_name,
                  Py_TYPE(q2)->tp_name);
     return NULL;
 #endif
   }
   else if (quat1 && (((scalar = PyFloat_AsDouble(q2)) == -1.0f && PyErr_Occurred()) == 0)) {
     /* QUAT *= FLOAT */
     mul_qt_fl(quat1->quat, scalar);
   }
   else {
     PyErr_Format(PyExc_TypeError,
                  "Element-wise multiplication: "
                  "not supported between '%.200s' and '%.200s' types",
                  Py_TYPE(q1)->tp_name,
                  Py_TYPE(q2)->tp_name);
     return NULL;
   }
 
   (void)BaseMath_WriteCallback(quat1);
   Py_INCREF(q1);
   return q1;
 }
 /*------------------------obj @ obj------------------------------
  * quaternion multiplication */
 static PyObject *Quaternion_matmul(PyObject *q1, PyObject *q2)
 {
   float quat[QUAT_SIZE];
   QuaternionObject *quat1 = NULL, *quat2 = NULL;
 
   if (QuaternionObject_Check(q1)) {
     quat1 = (QuaternionObject *)q1;
     if (BaseMath_ReadCallback(quat1) == -1) {
       return NULL;
     }
   }
   if (QuaternionObject_Check(q2)) {
     quat2 = (QuaternionObject *)q2;
     if (BaseMath_ReadCallback(quat2) == -1) {
       return NULL;
     }
   }
 
   if (quat1 && quat2) { /* QUAT @ QUAT (cross product) */
     mul_qt_qtqt(quat, quat1->quat, quat2->quat);
     return Quaternion_CreatePyObject(quat, Py_TYPE(q1));
   }
   else if (quat1) {
     /* QUAT @ VEC */
     if (VectorObject_Check(q2)) {
       VectorObject *vec2 = (VectorObject *)q2;
       float tvec[3];
 
       if (vec2->size != 3) {
         PyErr_SetString(PyExc_ValueError,
                         "Vector multiplication: "
                         "only 3D vector rotations (with quats) "
                         "currently supported");
         return NULL;
       }
       if (BaseMath_ReadCallback(vec2) == -1) {
         return NULL;
       }
 
       copy_v3_v3(tvec, vec2->vec);
       mul_qt_v3(quat1->quat, tvec);
 
       return Vector_CreatePyObject(tvec, 3, Py_TYPE(vec2));
     }
   }
 
   PyErr_Format(PyExc_TypeError,
                "Quaternion multiplication: "
                "not supported between '%.200s' and '%.200s' types",
                Py_TYPE(q1)->tp_name,
                Py_TYPE(q2)->tp_name);
   return NULL;
 }
 /*------------------------obj @= obj------------------------------
  * in-place quaternion multiplication */
 static PyObject *Quaternion_imatmul(PyObject *q1, PyObject *q2)
 {
   float quat[QUAT_SIZE];
   QuaternionObject *quat1 = NULL, *quat2 = NULL;
 
   if (QuaternionObject_Check(q1)) {
     quat1 = (QuaternionObject *)q1;
     if (BaseMath_ReadCallback(quat1) == -1) {
       return NULL;
     }
   }
   if (QuaternionObject_Check(q2)) {
     quat2 = (QuaternionObject *)q2;
     if (BaseMath_ReadCallback(quat2) == -1) {
       return NULL;
     }
   }
 
   if (quat1 && quat2) { /* QUAT @ QUAT (cross product) */
     mul_qt_qtqt(quat, quat1->quat, quat2->quat);
     copy_qt_qt(quat1->quat, quat);
   }
   else {
     PyErr_Format(PyExc_TypeError,
                  "In place quaternion multiplication: "
                  "not supported between '%.200s' and '%.200s' types",
                  Py_TYPE(q1)->tp_name,
                  Py_TYPE(q2)->tp_name);
     return NULL;
   }
 
   (void)BaseMath_WriteCallback(quat1);
   Py_INCREF(q1);
   return q1;
 }
 
 /* -obj
  * returns the negative of this object*/
 static PyObject *Quaternion_neg(QuaternionObject *self)
 {
   float tquat[QUAT_SIZE];
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   negate_v4_v4(tquat, self->quat);
   return Quaternion_CreatePyObject(tquat, Py_TYPE(self));
 }
 
 /* -----------------PROTOCOL DECLARATIONS-------------------------- */
 static PySequenceMethods Quaternion_SeqMethods = {
     (lenfunc)Quaternion_len,              /* sq_length */
     (binaryfunc)NULL,                     /* sq_concat */
     (ssizeargfunc)NULL,                   /* sq_repeat */
     (ssizeargfunc)Quaternion_item,        /* sq_item */
     (ssizessizeargfunc)NULL,              /* sq_slice, deprecated */
     (ssizeobjargproc)Quaternion_ass_item, /* sq_ass_item */
     (ssizessizeobjargproc)NULL,           /* sq_ass_slice, deprecated */
     (objobjproc)NULL,                     /* sq_contains */
     (binaryfunc)NULL,                     /* sq_inplace_concat */
     (ssizeargfunc)NULL,                   /* sq_inplace_repeat */
 };
 
 static PyMappingMethods Quaternion_AsMapping = {
     (lenfunc)Quaternion_len,
     (binaryfunc)Quaternion_subscript,
     (objobjargproc)Quaternion_ass_subscript,
 };
 
 static PyNumberMethods Quaternion_NumMethods = {
     (binaryfunc)Quaternion_add,     /*nb_add*/
     (binaryfunc)Quaternion_sub,     /*nb_subtract*/
     (binaryfunc)Quaternion_mul,     /*nb_multiply*/
     NULL,                           /*nb_remainder*/
     NULL,                           /*nb_divmod*/
     NULL,                           /*nb_power*/
     (unaryfunc)Quaternion_neg,      /*nb_negative*/
     (unaryfunc)Quaternion_copy,     /*tp_positive*/
     (unaryfunc)0,                   /*tp_absolute*/
     (inquiry)0,                     /*tp_bool*/
     (unaryfunc)0,                   /*nb_invert*/
     NULL,                           /*nb_lshift*/
     (binaryfunc)0,                  /*nb_rshift*/
     NULL,                           /*nb_and*/
     NULL,                           /*nb_xor*/
     NULL,                           /*nb_or*/
     NULL,                           /*nb_int*/
     NULL,                           /*nb_reserved*/
     NULL,                           /*nb_float*/
     NULL,                           /* nb_inplace_add */
     NULL,                           /* nb_inplace_subtract */
     (binaryfunc)Quaternion_imul,    /* nb_inplace_multiply */
     NULL,                           /* nb_inplace_remainder */
     NULL,                           /* nb_inplace_power */
     NULL,                           /* nb_inplace_lshift */
     NULL,                           /* nb_inplace_rshift */
     NULL,                           /* nb_inplace_and */
     NULL,                           /* nb_inplace_xor */
     NULL,                           /* nb_inplace_or */
     NULL,                           /* nb_floor_divide */
     NULL,                           /* nb_true_divide */
     NULL,                           /* nb_inplace_floor_divide */
     NULL,                           /* nb_inplace_true_divide */
     NULL,                           /* nb_index */
     (binaryfunc)Quaternion_matmul,  /* nb_matrix_multiply */
     (binaryfunc)Quaternion_imatmul, /* nb_inplace_matrix_multiply */
 };
 
 PyDoc_STRVAR(Quaternion_axis_doc, "Quaternion axis value.\n\n:type: float");
 static PyObject *Quaternion_axis_get(QuaternionObject *self, void *type)
 {
   return Quaternion_item(self, POINTER_AS_INT(type));
 }
 
 static int Quaternion_axis_set(QuaternionObject *self, PyObject *value, void *type)
 {
   return Quaternion_ass_item(self, POINTER_AS_INT(type), value);
 }
 
 PyDoc_STRVAR(Quaternion_magnitude_doc, "Size of the quaternion (read-only).\n\n:type: float");
 static PyObject *Quaternion_magnitude_get(QuaternionObject *self, void *UNUSED(closure))
 {
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   return PyFloat_FromDouble(sqrtf(dot_qtqt(self->quat, self->quat)));
 }
 
 PyDoc_STRVAR(Quaternion_angle_doc, "Angle of the quaternion.\n\n:type: float");
 static PyObject *Quaternion_angle_get(QuaternionObject *self, void *UNUSED(closure))
 {
   float tquat[4];
   float angle;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   normalize_qt_qt(tquat, self->quat);
 
   angle = 2.0f * saacos(tquat[0]);
 
   quat__axis_angle_sanitize(NULL, &angle);
 
   return PyFloat_FromDouble(angle);
 }
 
 static int Quaternion_angle_set(QuaternionObject *self, PyObject *value, void *UNUSED(closure))
 {
   float tquat[4];
   float len;
 
   float axis[3], angle_dummy;
   float angle;
 
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return -1;
   }
 
   len = normalize_qt_qt(tquat, self->quat);
   quat_to_axis_angle(axis, &angle_dummy, tquat);
 
   angle = PyFloat_AsDouble(value);
 
   if (angle == -1.0f && PyErr_Occurred()) { /* parsed item not a number */
     PyErr_SetString(PyExc_TypeError, "Quaternion.angle = value: float expected");
     return -1;
   }
 
   angle = angle_wrap_rad(angle);
 
   quat__axis_angle_sanitize(axis, &angle);
 
   axis_angle_to_quat(self->quat, axis, angle);
   mul_qt_fl(self->quat, len);
 
   if (BaseMath_WriteCallback(self) == -1) {
     return -1;
   }
 
   return 0;
 }
 
 PyDoc_STRVAR(Quaternion_axis_vector_doc, "Quaternion axis as a vector.\n\n:type: :class:`Vector`");
 static PyObject *Quaternion_axis_vector_get(QuaternionObject *self, void *UNUSED(closure))
 {
   float tquat[4];
 
   float axis[3];
   float angle_dummy;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   normalize_qt_qt(tquat, self->quat);
   quat_to_axis_angle(axis, &angle_dummy, tquat);
 
   quat__axis_angle_sanitize(axis, NULL);
 
   return Vector_CreatePyObject(axis, 3, NULL);
 }
 
 static int Quaternion_axis_vector_set(QuaternionObject *self,
                                       PyObject *value,
                                       void *UNUSED(closure))
 {
   float tquat[4];
   float len;
 
   float axis[3];
   float angle;
 
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return -1;
   }
 
   len = normalize_qt_qt(tquat, self->quat);
   quat_to_axis_angle(axis, &angle, tquat); /* axis value is unused */
 
   if (mathutils_array_parse(axis, 3, 3, value, "quat.axis = other") == -1) {
     return -1;
   }
 
   quat__axis_angle_sanitize(axis, &angle);
 
   axis_angle_to_quat(self->quat, axis, angle);
   mul_qt_fl(self->quat, len);
 
   if (BaseMath_WriteCallback(self) == -1) {
     return -1;
   }
 
   return 0;
 }
 
 /* ----------------------------------mathutils.Quaternion() -------------- */
 static PyObject *Quaternion_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 {
   PyObject *seq = NULL;
   double angle = 0.0f;
   float quat[QUAT_SIZE];
   unit_qt(quat);
 
   if (kwds && PyDict_Size(kwds)) {
     PyErr_SetString(PyExc_TypeError,
                     "mathutils.Quaternion(): "
                     "takes no keyword args");
     return NULL;
   }
 
   if (!PyArg_ParseTuple(args, "|Od:mathutils.Quaternion", &seq, &angle)) {
     return NULL;
   }
 
   switch (PyTuple_GET_SIZE(args)) {
     case 0:
       break;
     case 1: {
       int size;
 
       if ((size = mathutils_array_parse(quat, 3, QUAT_SIZE, seq, "mathutils.Quaternion()")) ==
           -1) {
         return NULL;
       }
 
       if (size == 4) {
         /* 4d: Quaternion (common case) */
       }
       else {
         /* 3d: Interpret as exponential map */
         BLI_assert(size == 3);
         expmap_to_quat(quat, quat);
       }
 
       break;
     }
     case 2: {
       float axis[3];
       if (mathutils_array_parse(axis, 3, 3, seq, "mathutils.Quaternion()") == -1) {
         return NULL;
       }
       angle = angle_wrap_rad(angle); /* clamp because of precision issues */
       axis_angle_to_quat(quat, axis, angle);
       break;
       /* PyArg_ParseTuple assures no more than 2 */
     }
   }
   return Quaternion_CreatePyObject(quat, type);
 }
 
-static PyObject *quat__apply_to_copy(PyNoArgsFunction quat_func, QuaternionObject *self)
+static PyObject *quat__apply_to_copy(PyObject *(*quat_func)(QuaternionObject *),
+                                     QuaternionObject *self)
 {
   PyObject *ret = Quaternion_copy(self);
-  PyObject *ret_dummy = quat_func(ret);
+  PyObject *ret_dummy = quat_func((QuaternionObject *)ret);
   if (ret_dummy) {
     Py_DECREF(ret_dummy);
     return ret;
   }
   else { /* error */
     Py_DECREF(ret);
     return NULL;
   }
 }
 
 /* axis vector suffers from precision errors, use this function to ensure */
 static void quat__axis_angle_sanitize(float axis[3], float *angle)
 {
   if (axis) {
     if (is_zero_v3(axis) || !isfinite(axis[0]) || !isfinite(axis[1]) || !isfinite(axis[2])) {
       axis[0] = 1.0f;
       axis[1] = 0.0f;
       axis[2] = 0.0f;
     }
     else if (EXPP_FloatsAreEqual(axis[0], 0.0f, 10) && EXPP_FloatsAreEqual(axis[1], 0.0f, 10) &&
              EXPP_FloatsAreEqual(axis[2], 0.0f, 10)) {
       axis[0] = 1.0f;
     }
   }
 
   if (angle) {
     if (!isfinite(*angle)) {
       *angle = 0.0f;
     }
   }
 }
 
 /* -----------------------METHOD DEFINITIONS ---------------------- */
 static struct PyMethodDef Quaternion_methods[] = {
     /* in place only */
     {"identity", (PyCFunction)Quaternion_identity, METH_NOARGS, Quaternion_identity_doc},
     {"negate", (PyCFunction)Quaternion_negate, METH_NOARGS, Quaternion_negate_doc},
 
     /* operate on original or copy */
     {"conjugate", (PyCFunction)Quaternion_conjugate, METH_NOARGS, Quaternion_conjugate_doc},
     {"conjugated", (PyCFunction)Quaternion_conjugated, METH_NOARGS, Quaternion_conjugated_doc},
 
     {"invert", (PyCFunction)Quaternion_invert, METH_NOARGS, Quaternion_invert_doc},
     {"inverted", (PyCFunction)Quaternion_inverted, METH_NOARGS, Quaternion_inverted_doc},
 
     {"normalize", (PyCFunction)Quaternion_normalize, METH_NOARGS, Quaternion_normalize_doc},
     {"normalized", (PyCFunction)Quaternion_normalized, METH_NOARGS, Quaternion_normalized_doc},
 
     /* return converted representation */
     {"to_euler", (PyCFunction)Quaternion_to_euler, METH_VARARGS, Quaternion_to_euler_doc},
     {"to_matrix", (PyCFunction)Quaternion_to_matrix, METH_NOARGS, Quaternion_to_matrix_doc},
     {"to_axis_angle",
      (PyCFunction)Quaternion_to_axis_angle,
      METH_NOARGS,
      Quaternion_to_axis_angle_doc},
     {"to_swing_twist",
      (PyCFunction)Quaternion_to_swing_twist,
      METH_O,
      Quaternion_to_swing_twist_doc},
     {"to_exponential_map",
      (PyCFunction)Quaternion_to_exponential_map,
      METH_NOARGS,
      Quaternion_to_exponential_map_doc},
 
     /* operation between 2 or more types  */
     {"cross", (PyCFunction)Quaternion_cross, METH_O, Quaternion_cross_doc},
     {"dot", (PyCFunction)Quaternion_dot, METH_O, Quaternion_dot_doc},
     {"rotation_difference",
      (PyCFunction)Quaternion_rotation_difference,
      METH_O,
      Quaternion_rotation_difference_doc},
     {"slerp", (PyCFunction)Quaternion_slerp, METH_VARARGS, Quaternion_slerp_doc},
     {"rotate", (PyCFunction)Quaternion_rotate, METH_O, Quaternion_rotate_doc},
     {"make_compatible",
      (PyCFunction)Quaternion_make_compatible,
      METH_O,
      Quaternion_make_compatible_doc},
 
     /* base-math methods */
     {"freeze", (PyCFunction)BaseMathObject_freeze, METH_NOARGS, BaseMathObject_freeze_doc},
 
     {"copy", (PyCFunction)Quaternion_copy, METH_NOARGS, Quaternion_copy_doc},
     {"__copy__", (PyCFunction)Quaternion_copy, METH_NOARGS, Quaternion_copy_doc},
     {"__deepcopy__", (PyCFunction)Quaternion_deepcopy, METH_VARARGS, Quaternion_copy_doc},
     {NULL, NULL, 0, NULL},
 };
 
 /*****************************************************************************/
 /* Python attributes get/set structure:                                      */
 /*****************************************************************************/
 static PyGetSetDef Quaternion_getseters[] = {
     {"w",
      (getter)Quaternion_axis_get,
      (setter)Quaternion_axis_set,
      Quaternion_axis_doc,
      (void *)0},
     {"x",
      (getter)Quaternion_axis_get,
      (setter)Quaternion_axis_set,
      Quaternion_axis_doc,
      (void *)1},
     {"y",
      (getter)Quaternion_axis_get,
      (setter)Quaternion_axis_set,
      Quaternion_axis_doc,
      (void *)2},
     {"z",
      (getter)Quaternion_axis_get,
      (setter)Quaternion_axis_set,
      Quaternion_axis_doc,
      (void *)3},
     {"magnitude", (getter)Quaternion_magnitude_get, (setter)NULL, Quaternion_magnitude_doc, NULL},
     {"angle",
      (getter)Quaternion_angle_get,
      (setter)Quaternion_angle_set,
      Quaternion_angle_doc,
      NULL},
     {"axis",
      (getter)Quaternion_axis_vector_get,
      (setter)Quaternion_axis_vector_set,
      Quaternion_axis_vector_doc,
      NULL},
     {"is_wrapped",
      (getter)BaseMathObject_is_wrapped_get,
      (setter)NULL,
      BaseMathObject_is_wrapped_doc,
      NULL},
     {"is_frozen",
      (getter)BaseMathObject_is_frozen_get,
      (setter)NULL,
      BaseMathObject_is_frozen_doc,
      NULL},
     {"owner", (getter)BaseMathObject_owner_get, (setter)NULL, BaseMathObject_owner_doc, NULL},
     {NULL, NULL, NULL, NULL, NULL} /* Sentinel */
 };
 
 /* ------------------PY_OBECT DEFINITION-------------------------- */
 PyDoc_STRVAR(quaternion_doc,
              ".. class:: Quaternion([seq, [angle]])\n"
              "\n"
              "   This object gives access to Quaternions in Blender.\n"
              "\n"
              "   :param seq: size 3 or 4\n"
              "   :type seq: :class:`Vector`\n"
              "   :param angle: rotation angle, in radians\n"
              "   :type angle: float\n"
              "\n"
              "   The constructor takes arguments in various forms:\n"
              "\n"
              "   (), *no args*\n"
              "      Create an identity quaternion\n"
              "   (*wxyz*)\n"
              "      Create a quaternion from a ``(w, x, y, z)`` vector.\n"
              "   (*exponential_map*)\n"
              "      Create a quaternion from a 3d exponential map vector.\n"
              "\n"
              "      .. seealso:: :meth:`to_exponential_map`\n"
              "   (*axis, angle*)\n"
              "      Create a quaternion representing a rotation of *angle* radians over *axis*.\n"
              "\n"
              "      .. seealso:: :meth:`to_axis_angle`\n");
 PyTypeObject quaternion_Type = {
     PyVarObject_HEAD_INIT(NULL, 0) "Quaternion", /* tp_name */
     sizeof(QuaternionObject),                    /* tp_basicsize */
     0,                                           /* tp_itemsize */
     (destructor)BaseMathObject_dealloc,          /* tp_dealloc */
     (printfunc)NULL,                             /* tp_print */
     NULL,                                        /* tp_getattr */
     NULL,                                        /* tp_setattr */
     NULL,                                        /* tp_compare */
     (reprfunc)Quaternion_repr,                   /* tp_repr */
     &Quaternion_NumMethods,                      /* tp_as_number */
     &Quaternion_SeqMethods,                      /* tp_as_sequence */
     &Quaternion_AsMapping,                       /* tp_as_mapping */
     (hashfunc)Quaternion_hash,                   /* tp_hash */
     NULL,                                        /* tp_call */
 #ifndef MATH_STANDALONE
     (reprfunc)Quaternion_str, /* tp_str */
 #else
     NULL, /* tp_str */
 #endif
     NULL,                                                          /* tp_getattro */
     NULL,                                                          /* tp_setattro */
     NULL,                                                          /* tp_as_buffer */
     Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, /* tp_flags */
     quaternion_doc,                                                /* tp_doc */
     (traverseproc)BaseMathObject_traverse,                         /* tp_traverse */
     (inquiry)BaseMathObject_clear,                                 /* tp_clear */
     (richcmpfunc)Quaternion_richcmpr,                              /* tp_richcompare */
     0,                                                             /* tp_weaklistoffset */
     NULL,                                                          /* tp_iter */
     NULL,                                                          /* tp_iternext */
     Quaternion_methods,                                            /* tp_methods */
     NULL,                                                          /* tp_members */
     Quaternion_getseters,                                          /* tp_getset */
     NULL,                                                          /* tp_base */
     NULL,                                                          /* tp_dict */
     NULL,                                                          /* tp_descr_get */
     NULL,                                                          /* tp_descr_set */
     0,                                                             /* tp_dictoffset */
     NULL,                                                          /* tp_init */
     NULL,                                                          /* tp_alloc */
     Quaternion_new,                                                /* tp_new */
     NULL,                                                          /* tp_free */
     NULL,                                                          /* tp_is_gc */
     NULL,                                                          /* tp_bases */
     NULL,                                                          /* tp_mro */
     NULL,                                                          /* tp_cache */
     NULL,                                                          /* tp_subclasses */
     NULL,                                                          /* tp_weaklist */
     NULL,                                                          /* tp_del */
 };
 
 PyObject *Quaternion_CreatePyObject(const float quat[4], PyTypeObject *base_type)
 {
   QuaternionObject *self;
   float *quat_alloc;
 
   quat_alloc = PyMem_Malloc(QUAT_SIZE * sizeof(float));
   if (UNLIKELY(quat_alloc == NULL)) {
     PyErr_SetString(PyExc_MemoryError,
                     "Quaternion(): "
                     "problem allocating data");
     return NULL;
   }
 
   self = BASE_MATH_NEW(QuaternionObject, quaternion_Type, base_type);
   if (self) {
     self->quat = quat_alloc;
     /* init callbacks as NULL */
     self->cb_user = NULL;
     self->cb_type = self->cb_subtype = 0;
 
     /* NEW */
     if (!quat) { /* new empty */
       unit_qt(self->quat);
     }
     else {
       copy_qt_qt(self->quat, quat);
     }
     self->flag = BASE_MATH_FLAG_DEFAULT;
   }
   else {
     PyMem_Free(quat_alloc);
   }
 
   return (PyObject *)self;
 }
 
 PyObject *Quaternion_CreatePyObject_wrap(float quat[4], PyTypeObject *base_type)
 {
   QuaternionObject *self;
 
   self = BASE_MATH_NEW(QuaternionObject, quaternion_Type, base_type);
   if (self) {
     /* init callbacks as NULL */
     self->cb_user = NULL;
     self->cb_type = self->cb_subtype = 0;
 
     /* WRAP */
     self->quat = quat;
     self->flag = BASE_MATH_FLAG_DEFAULT | BASE_MATH_FLAG_IS_WRAP;
   }
   return (PyObject *)self;
 }
 
 PyObject *Quaternion_CreatePyObject_cb(PyObject *cb_user, uchar cb_type, uchar cb_subtype)
 {
   QuaternionObject *self = (QuaternionObject *)Quaternion_CreatePyObject(NULL, NULL);
   if (self) {
     Py_INCREF(cb_user);
     self->cb_user = cb_user;
     self->cb_type = cb_type;
     self->cb_subtype = cb_subtype;
     PyObject_GC_Track(self);
   }
 
   return (PyObject *)self;
 }
diff --git a/source/blender/python/mathutils/mathutils_Vector.c b/source/blender/python/mathutils/mathutils_Vector.c
index ace7480ee81..15ae811fd91 100644
--- a/source/blender/python/mathutils/mathutils_Vector.c
+++ b/source/blender/python/mathutils/mathutils_Vector.c
@@ -1,3247 +1,3247 @@
 /*
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version 2
  * of the License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
 /** \file
  * \ingroup pymathutils
  */
 
 #include <Python.h>
 
 #include "mathutils.h"
 
 #include "BLI_math.h"
 #include "BLI_utildefines.h"
 
 #include "../generic/py_capi_utils.h"
 
 #ifndef MATH_STANDALONE
 #  include "BLI_dynstr.h"
 #endif
 
 /**
  * Higher dimensions are supported, for many common operations
  * (dealing with vector/matrix multiply or handling as 3D locations)
  * stack memory is used with a fixed size - defined here.
  */
 #define MAX_DIMENSIONS 4
 
 /* Swizzle axes get packed into a single value that is used as a closure. Each
  * axis uses SWIZZLE_BITS_PER_AXIS bits. The first bit (SWIZZLE_VALID_AXIS) is
  * used as a sentinel: if it is unset, the axis is not valid. */
 #define SWIZZLE_BITS_PER_AXIS 3
 #define SWIZZLE_VALID_AXIS 0x4
 #define SWIZZLE_AXIS 0x3
 
 static PyObject *Vector_copy(VectorObject *self);
 static PyObject *Vector_deepcopy(VectorObject *self, PyObject *args);
 static PyObject *Vector_to_tuple_ex(VectorObject *self, int ndigits);
 static int row_vector_multiplication(float rvec[MAX_DIMENSIONS],
                                      VectorObject *vec,
                                      MatrixObject *mat);
 
 /**
  * Supports 2D, 3D, and 4D vector objects both int and float values
  * accepted. Mixed float and int values accepted. Ints are parsed to float
  */
 static PyObject *Vector_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 {
   float *vec = NULL;
   int size = 3; /* default to a 3D vector */
 
   if (kwds && PyDict_Size(kwds)) {
     PyErr_SetString(PyExc_TypeError,
                     "Vector(): "
                     "takes no keyword args");
     return NULL;
   }
 
   switch (PyTuple_GET_SIZE(args)) {
     case 0:
       vec = PyMem_Malloc(size * sizeof(float));
 
       if (vec == NULL) {
         PyErr_SetString(PyExc_MemoryError,
                         "Vector(): "
                         "problem allocating pointer space");
         return NULL;
       }
 
       copy_vn_fl(vec, size, 0.0f);
       break;
     case 1:
       if ((size = mathutils_array_parse_alloc(
                &vec, 2, PyTuple_GET_ITEM(args, 0), "mathutils.Vector()")) == -1) {
         return NULL;
       }
       break;
     default:
       PyErr_SetString(PyExc_TypeError,
                       "mathutils.Vector(): "
                       "more than a single arg given");
       return NULL;
   }
   return Vector_CreatePyObject_alloc(vec, size, type);
 }
 
-static PyObject *vec__apply_to_copy(PyNoArgsFunction vec_func, VectorObject *self)
+static PyObject *vec__apply_to_copy(PyObject *(*vec_func)(VectorObject *), VectorObject *self)
 {
   PyObject *ret = Vector_copy(self);
-  PyObject *ret_dummy = vec_func(ret);
+  PyObject *ret_dummy = vec_func((VectorObject *)ret);
   if (ret_dummy) {
     Py_DECREF(ret_dummy);
     return (PyObject *)ret;
   }
   else { /* error */
     Py_DECREF(ret);
     return NULL;
   }
 }
 
 /*-----------------------CLASS-METHODS----------------------------*/
 PyDoc_STRVAR(C_Vector_Fill_doc,
              ".. classmethod:: Fill(size, fill=0.0)\n"
              "\n"
              "   Create a vector of length size with all values set to fill.\n"
              "\n"
              "   :arg size: The length of the vector to be created.\n"
              "   :type size: int\n"
              "   :arg fill: The value used to fill the vector.\n"
              "   :type fill: float\n");
 static PyObject *C_Vector_Fill(PyObject *cls, PyObject *args)
 {
   float *vec;
   int size;
   float fill = 0.0f;
 
   if (!PyArg_ParseTuple(args, "i|f:Vector.Fill", &size, &fill)) {
     return NULL;
   }
 
   if (size < 2) {
     PyErr_SetString(PyExc_RuntimeError, "Vector(): invalid size");
     return NULL;
   }
 
   vec = PyMem_Malloc(size * sizeof(float));
 
   if (vec == NULL) {
     PyErr_SetString(PyExc_MemoryError,
                     "Vector.Fill(): "
                     "problem allocating pointer space");
     return NULL;
   }
 
   copy_vn_fl(vec, size, fill);
 
   return Vector_CreatePyObject_alloc(vec, size, (PyTypeObject *)cls);
 }
 
 PyDoc_STRVAR(C_Vector_Range_doc,
              ".. classmethod:: Range(start=0, stop, step=1)\n"
              "\n"
              "   Create a filled with a range of values.\n"
              "\n"
              "   :arg start: The start of the range used to fill the vector.\n"
              "   :type start: int\n"
              "   :arg stop: The end of the range used to fill the vector.\n"
              "   :type stop: int\n"
              "   :arg step: The step between successive values in the vector.\n"
              "   :type step: int\n");
 static PyObject *C_Vector_Range(PyObject *cls, PyObject *args)
 {
   float *vec;
   int stop, size;
   int start = 0;
   int step = 1;
 
   if (!PyArg_ParseTuple(args, "i|ii:Vector.Range", &start, &stop, &step)) {
     return NULL;
   }
 
   switch (PyTuple_GET_SIZE(args)) {
     case 1:
       size = start;
       start = 0;
       break;
     case 2:
       if (start >= stop) {
         PyErr_SetString(PyExc_RuntimeError,
                         "Start value is larger "
                         "than the stop value");
         return NULL;
       }
 
       size = stop - start;
       break;
     default:
       if (start >= stop) {
         PyErr_SetString(PyExc_RuntimeError,
                         "Start value is larger "
                         "than the stop value");
         return NULL;
       }
 
       size = (stop - start);
 
       if ((size % step) != 0) {
         size += step;
       }
 
       size /= step;
 
       break;
   }
 
   if (size < 2) {
     PyErr_SetString(PyExc_RuntimeError, "Vector(): invalid size");
     return NULL;
   }
 
   vec = PyMem_Malloc(size * sizeof(float));
 
   if (vec == NULL) {
     PyErr_SetString(PyExc_MemoryError,
                     "Vector.Range(): "
                     "problem allocating pointer space");
     return NULL;
   }
 
   range_vn_fl(vec, size, (float)start, (float)step);
 
   return Vector_CreatePyObject_alloc(vec, size, (PyTypeObject *)cls);
 }
 
 PyDoc_STRVAR(C_Vector_Linspace_doc,
              ".. classmethod:: Linspace(start, stop, size)\n"
              "\n"
              "   Create a vector of the specified size which is filled with linearly spaced "
              "values between start and stop values.\n"
              "\n"
              "   :arg start: The start of the range used to fill the vector.\n"
              "   :type start: int\n"
              "   :arg stop: The end of the range used to fill the vector.\n"
              "   :type stop: int\n"
              "   :arg size: The size of the vector to be created.\n"
              "   :type size: int\n");
 static PyObject *C_Vector_Linspace(PyObject *cls, PyObject *args)
 {
   float *vec;
   int size;
   float start, end, step;
 
   if (!PyArg_ParseTuple(args, "ffi:Vector.Linspace", &start, &end, &size)) {
     return NULL;
   }
 
   if (size < 2) {
     PyErr_SetString(PyExc_RuntimeError, "Vector.Linspace(): invalid size");
     return NULL;
   }
 
   step = (end - start) / (float)(size - 1);
 
   vec = PyMem_Malloc(size * sizeof(float));
 
   if (vec == NULL) {
     PyErr_SetString(PyExc_MemoryError,
                     "Vector.Linspace(): "
                     "problem allocating pointer space");
     return NULL;
   }
 
   range_vn_fl(vec, size, start, step);
 
   return Vector_CreatePyObject_alloc(vec, size, (PyTypeObject *)cls);
 }
 
 PyDoc_STRVAR(
     C_Vector_Repeat_doc,
     ".. classmethod:: Repeat(vector, size)\n"
     "\n"
     "   Create a vector by repeating the values in vector until the required size is reached.\n"
     "\n"
     "   :arg tuple: The vector to draw values from.\n"
     "   :type tuple: :class:`mathutils.Vector`\n"
     "   :arg size: The size of the vector to be created.\n"
     "   :type size: int\n");
 static PyObject *C_Vector_Repeat(PyObject *cls, PyObject *args)
 {
   float *vec;
   float *iter_vec = NULL;
   int i, size, value_size;
   PyObject *value;
 
   if (!PyArg_ParseTuple(args, "Oi:Vector.Repeat", &value, &size)) {
     return NULL;
   }
 
   if (size < 2) {
     PyErr_SetString(PyExc_RuntimeError, "Vector.Repeat(): invalid size");
     return NULL;
   }
 
   if ((value_size = mathutils_array_parse_alloc(
            &iter_vec, 2, value, "Vector.Repeat(vector, size), invalid 'vector' arg")) == -1) {
     return NULL;
   }
 
   if (iter_vec == NULL) {
     PyErr_SetString(PyExc_MemoryError,
                     "Vector.Repeat(): "
                     "problem allocating pointer space");
     return NULL;
   }
 
   vec = PyMem_Malloc(size * sizeof(float));
 
   if (vec == NULL) {
     PyMem_Free(iter_vec);
     PyErr_SetString(PyExc_MemoryError,
                     "Vector.Repeat(): "
                     "problem allocating pointer space");
     return NULL;
   }
 
   i = 0;
   while (i < size) {
     vec[i] = iter_vec[i % value_size];
     i++;
   }
 
   PyMem_Free(iter_vec);
 
   return Vector_CreatePyObject_alloc(vec, size, (PyTypeObject *)cls);
 }
 
 /*-----------------------------METHODS---------------------------- */
 PyDoc_STRVAR(Vector_zero_doc,
              ".. method:: zero()\n"
              "\n"
              "   Set all values to zero.\n");
 static PyObject *Vector_zero(VectorObject *self)
 {
   if (BaseMath_Prepare_ForWrite(self) == -1) {
     return NULL;
   }
 
   copy_vn_fl(self->vec, self->size, 0.0f);
 
   if (BaseMath_WriteCallback(self) == -1) {
     return NULL;
   }
 
   Py_RETURN_NONE;
 }
 
 PyDoc_STRVAR(Vector_normalize_doc,
              ".. method:: normalize()\n"
              "\n"
              "   Normalize the vector, making the length of the vector always 1.0.\n"
              "\n"
              "   .. warning:: Normalizing a vector where all values are zero has no effect.\n"
              "\n"
              "   .. note:: Normalize works for vectors of all sizes,\n"
              "      however 4D Vectors w axis is left untouched.\n");
 static PyObject *Vector_normalize(VectorObject *self)
 {
   int size = (self->size == 4 ? 3 : self->size);
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return NULL;
   }
 
   normalize_vn(self->vec, size);
 
   (void)BaseMath_WriteCallback(self);
   Py_RETURN_NONE;
 }
 PyDoc_STRVAR(Vector_normalized_doc,
              ".. method:: normalized()\n"
              "\n"
              "   Return a new, normalized vector.\n"
              "\n"
              "   :return: a normalized copy of the vector\n"
              "   :rtype: :class:`Vector`\n");
 static PyObject *Vector_normalized(VectorObject *self)
 {
-  return vec__apply_to_copy((PyNoArgsFunction)Vector_normalize, self);
+  return vec__apply_to_copy(Vector_normalize, self);
 }
 
 PyDoc_STRVAR(Vector_resize_doc,
              ".. method:: resize(size=3)\n"
              "\n"
              "   Resize the vector to have size number of elements.\n");
 static PyObject *Vector_resize(VectorObject *self, PyObject *value)
 {
   int size;
 
   if (self->flag & BASE_MATH_FLAG_IS_WRAP) {
     PyErr_SetString(PyExc_TypeError,
                     "Vector.resize(): "
                     "cannot resize wrapped data - only python vectors");
     return NULL;
   }
   if (self->cb_user) {
     PyErr_SetString(PyExc_TypeError,
                     "Vector.resize(): "
                     "cannot resize a vector that has an owner");
     return NULL;
   }
 
   if ((size = PyC_Long_AsI32(value)) == -1) {
     PyErr_SetString(PyExc_TypeError,
                     "Vector.resize(size): "
                     "expected size argument to be an integer");
     return NULL;
   }
 
   if (size < 2) {
     PyErr_SetString(PyExc_RuntimeError, "Vector.resize(): invalid size");
     return NULL;
   }
 
   self->vec = PyMem_Realloc(self->vec, (size * sizeof(float)));
   if (self->vec == NULL) {
     PyErr_SetString(PyExc_MemoryError,
                     "Vector.resize(): "
                     "problem allocating pointer space");
     return NULL;
   }
 
   /* If the vector has increased in length, set all new elements to 0.0f */
   if (size > self->size) {
     copy_vn_fl(self->vec + self->size, size - self->size, 0.0f);
   }
 
   self->size = size;
   Py_RETURN_NONE;
 }
 
 PyDoc_STRVAR(Vector_resized_doc,
              ".. method:: resized(size=3)\n"
              "\n"
              "   Return a resized copy of the vector with size number of elements.\n"
              "\n"
              "   :return: a new vector\n"
              "   :rtype: :class:`Vector`\n");
 static PyObject *Vector_resized(VectorObject *self, PyObject *value)
 {
   int size;
   float *vec;
 
   if ((size = PyLong_AsLong(value)) == -1) {
     return NULL;
   }
 
   if (size < 2) {
     PyErr_SetString(PyExc_RuntimeError, "Vector.resized(): invalid size");
     return NULL;
   }
 
   vec = PyMem_Malloc(size * sizeof(float));
 
   if (vec == NULL) {
     PyErr_SetString(PyExc_MemoryError,
                     "Vector.resized(): "
                     "problem allocating pointer space");
     return NULL;
   }
 
   copy_vn_fl(vec, size, 0.0f);
   memcpy(vec, self->vec, self->size * sizeof(float));
 
   return Vector_CreatePyObject_alloc(vec, size, NULL);
 }
 
 PyDoc_STRVAR(Vector_resize_2d_doc,
              ".. method:: resize_2d()\n"
              "\n"
              "   Resize the vector to 2D  (x, y).\n");
 static PyObject *Vector_resize_2d(VectorObject *self)
 {
   if (self->flag & BASE_MATH_FLAG_IS_WRAP) {
     PyErr_SetString(PyExc_TypeError,
                     "Vector.resize_2d(): "
                     "cannot resize wrapped data - only python vectors");
     return NULL;
   }
   if (self->cb_user) {
     PyErr_SetString(PyExc_TypeError,
                     "Vector.resize_2d(): "
                     "cannot resize a vector that has an owner");
     return NULL;
   }
 
   self->vec = PyMem_Realloc(self->vec, (sizeof(float) * 2));
   if (self->vec == NULL) {
     PyErr_SetString(PyExc_MemoryError,
                     "Vector.resize_2d(): "
                     "problem allocating pointer space");
     return NULL;
   }
 
   self->size = 2;
   Py_RETURN_NONE;
 }
 
 PyDoc_STRVAR(Vector_resize_3d_doc,
              ".. method:: resize_3d()\n"
              "\n"
              "   Resize the vector to 3D  (x, y, z).\n");
 static PyObject *Vector_resize_3d(VectorObject *self)
 {
   if (self->flag & BASE_MATH_FLAG_IS_WRAP) {
     PyErr_SetString(PyExc_TypeError,
                     "Vector.resize_3d(): "
                     "cannot resize wrapped data - only python vectors");
     return NULL;
   }
   if (self->cb_user) {
     PyErr_SetString(PyExc_TypeError,
                     "Vector.resize_3d(): "
                     "cannot resize a vector that has an owner");
     return NULL;
   }
 
   self->vec = PyMem_Realloc(self->vec, (sizeof(float) * 3));
   if (self->vec == NULL) {
     PyErr_SetString(PyExc_MemoryError,
                     "Vector.resize_3d(): "
                     "problem allocating pointer space");
     return NULL;
   }
 
   if (self->size == 2) {
     self->vec[2] = 0.0f;
   }
 
   self->size = 3;
   Py_RETURN_NONE;
 }
 
 PyDoc_STRVAR(Vector_resize_4d_doc,
              ".. method:: resize_4d()\n"
              "\n"
              "   Resize the vector to 4D (x, y, z, w).\n");
 static PyObject *Vector_resize_4d(VectorObject *self)
 {
   if (self->flag & BASE_MATH_FLAG_IS_WRAP) {
     PyErr_SetString(PyExc_TypeError,
                     "Vector.resize_4d(): "
                     "cannot resize wrapped data - only python vectors");
     return NULL;
   }
   if (self->cb_user) {
     PyErr_SetString(PyExc_TypeError,
                     "Vector.resize_4d(): "
                     "cannot resize a vector that has an owner");
     return NULL;
   }
 
   self->vec = PyMem_Realloc(self->vec, (sizeof(float) * 4));
   if (self->vec == NULL) {
     PyErr_SetString(PyExc_MemoryError,
                     "Vector.resize_4d(): "
                     "problem allocating pointer space");
     return NULL;
   }
 
   if (self->size == 2) {
     self->vec[2] = 0.0f;
     self->vec[3] = 1.0f;
   }
   else if (self->size == 3) {
     self->vec[3] = 1.0f;
   }
   self->size = 4;
   Py_RETURN_NONE;
 }
 PyDoc_STRVAR(Vector_to_2d_doc,
              ".. method:: to_2d()\n"
              "\n"
              "   Return a 2d copy of the vector.\n"
              "\n"
              "   :return: a new vector\n"
              "   :rtype: :class:`Vector`\n");
 static PyObject *Vector_to_2d(VectorObject *self)
 {
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   return Vector_CreatePyObject(self->vec, 2, Py_TYPE(self));
 }
 PyDoc_STRVAR(Vector_to_3d_doc,
              ".. method:: to_3d()\n"
              "\n"
              "   Return a 3d copy of the vector.\n"
              "\n"
              "   :return: a new vector\n"
              "   :rtype: :class:`Vector`\n");
 static PyObject *Vector_to_3d(VectorObject *self)
 {
   float tvec[3] = {0.0f};
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   memcpy(tvec, self->vec, sizeof(float) * MIN2(self->size, 3));
   return Vector_CreatePyObject(tvec, 3, Py_TYPE(self));
 }
 PyDoc_STRVAR(Vector_to_4d_doc,
              ".. method:: to_4d()\n"
              "\n"
              "   Return a 4d copy of the vector.\n"
              "\n"
              "   :return: a new vector\n"
              "   :rtype: :class:`Vector`\n");
 static PyObject *Vector_to_4d(VectorObject *self)
 {
   float tvec[4] = {0.0f, 0.0f, 0.0f, 1.0f};
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   memcpy(tvec, self->vec, sizeof(float) * MIN2(self->size, 4));
   return Vector_CreatePyObject(tvec, 4, Py_TYPE(self));
 }
 
 PyDoc_STRVAR(Vector_to_tuple_doc,
              ".. method:: to_tuple(precision=-1)\n"
              "\n"
              "   Return this vector as a tuple with.\n"
              "\n"
              "   :arg precision: The number to round the value to in [-1, 21].\n"
              "   :type precision: int\n"
              "   :return: the values of the vector rounded by *precision*\n"
              "   :rtype: tuple\n");
 /* note: BaseMath_ReadCallback must be called beforehand */
 static PyObject *Vector_to_tuple_ex(VectorObject *self, int ndigits)
 {
   PyObject *ret;
   int i;
 
   ret = PyTuple_New(self->size);
 
   if (ndigits >= 0) {
     for (i = 0; i < self->size; i++) {
       PyTuple_SET_ITEM(ret, i, PyFloat_FromDouble(double_round((double)self->vec[i], ndigits)));
     }
   }
   else {
     for (i = 0; i < self->size; i++) {
       PyTuple_SET_ITEM(ret, i, PyFloat_FromDouble(self->vec[i]));
     }
   }
 
   return ret;
 }
 
 static PyObject *Vector_to_tuple(VectorObject *self, PyObject *args)
 {
   int ndigits = 0;
 
   if (!PyArg_ParseTuple(args, "|i:to_tuple", &ndigits)) {
     return NULL;
   }
 
   if (ndigits > 22 || ndigits < 0) {
     PyErr_SetString(PyExc_ValueError,
                     "Vector.to_tuple(ndigits): "
                     "ndigits must be between 0 and 21");
     return NULL;
   }
 
   if (PyTuple_GET_SIZE(args) == 0) {
     ndigits = -1;
   }
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   return Vector_to_tuple_ex(self, ndigits);
 }
 
 PyDoc_STRVAR(Vector_to_track_quat_doc,
              ".. method:: to_track_quat(track, up)\n"
              "\n"
              "   Return a quaternion rotation from the vector and the track and up axis.\n"
              "\n"
              "   :arg track: Track axis in ['X', 'Y', 'Z', '-X', '-Y', '-Z'].\n"
              "   :type track: string\n"
              "   :arg up: Up axis in ['X', 'Y', 'Z'].\n"
              "   :type up: string\n"
              "   :return: rotation from the vector and the track and up axis.\n"
              "   :rtype: :class:`Quaternion`\n");
 static PyObject *Vector_to_track_quat(VectorObject *self, PyObject *args)
 {
   float vec[3], quat[4];
   const char *strack = NULL;
   const char *sup = NULL;
   short track = 2, up = 1;
 
   if (!PyArg_ParseTuple(args, "|ss:to_track_quat", &strack, &sup)) {
     return NULL;
   }
 
   if (self->size != 3) {
     PyErr_SetString(PyExc_TypeError,
                     "Vector.to_track_quat(): "
                     "only for 3D vectors");
     return NULL;
   }
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if (strack) {
     const char *axis_err_msg = "only X, -X, Y, -Y, Z or -Z for track axis";
 
     if (strlen(strack) == 2) {
       if (strack[0] == '-') {
         switch (strack[1]) {
           case 'X':
             track = 3;
             break;
           case 'Y':
             track = 4;
             break;
           case 'Z':
             track = 5;
             break;
           default:
             PyErr_SetString(PyExc_ValueError, axis_err_msg);
             return NULL;
         }
       }
       else {
         PyErr_SetString(PyExc_ValueError, axis_err_msg);
         return NULL;
       }
     }
     else if (strlen(strack) == 1) {
       switch (strack[0]) {
         case '-':
         case 'X':
           track = 0;
           break;
         case 'Y':
           track = 1;
           break;
         case 'Z':
           track = 2;
           break;
         default:
           PyErr_SetString(PyExc_ValueError, axis_err_msg);
           return NULL;
       }
     }
     else {
       PyErr_SetString(PyExc_ValueError, axis_err_msg);
       return NULL;
     }
   }
 
   if (sup) {
     const char *axis_err_msg = "only X, Y or Z for up axis";
     if (strlen(sup) == 1) {
       switch (*sup) {
         case 'X':
           up = 0;
           break;
         case 'Y':
           up = 1;
           break;
         case 'Z':
           up = 2;
           break;
         default:
           PyErr_SetString(PyExc_ValueError, axis_err_msg);
           return NULL;
       }
     }
     else {
       PyErr_SetString(PyExc_ValueError, axis_err_msg);
       return NULL;
     }
   }
 
   if (track == up) {
     PyErr_SetString(PyExc_ValueError, "Can't have the same axis for track and up");
     return NULL;
   }
 
   /* Flip vector around, since #vec_to_quat expect a vector from target to tracking object
    * and the python function expects the inverse (a vector to the target). */
   negate_v3_v3(vec, self->vec);
 
   vec_to_quat(quat, vec, track, up);
 
   return Quaternion_CreatePyObject(quat, NULL);
 }
 
 PyDoc_STRVAR(
     Vector_orthogonal_doc,
     ".. method:: orthogonal()\n"
     "\n"
     "   Return a perpendicular vector.\n"
     "\n"
     "   :return: a new vector 90 degrees from this vector.\n"
     "   :rtype: :class:`Vector`\n"
     "\n"
     "   .. note:: the axis is undefined, only use when any orthogonal vector is acceptable.\n");
 static PyObject *Vector_orthogonal(VectorObject *self)
 {
   float vec[3];
 
   if (self->size > 3) {
     PyErr_SetString(PyExc_TypeError,
                     "Vector.orthogonal(): "
                     "Vector must be 3D or 2D");
     return NULL;
   }
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if (self->size == 3) {
     ortho_v3_v3(vec, self->vec);
   }
   else {
     ortho_v2_v2(vec, self->vec);
   }
 
   return Vector_CreatePyObject(vec, self->size, Py_TYPE(self));
 }
 
 /**
  * Vector.reflect(mirror): return a reflected vector on the mirror normal.
  * <pre>
  * vec - ((2 * dot(vec, mirror)) * mirror)
  * </pre>
  */
 PyDoc_STRVAR(Vector_reflect_doc,
              ".. method:: reflect(mirror)\n"
              "\n"
              "   Return the reflection vector from the *mirror* argument.\n"
              "\n"
              "   :arg mirror: This vector could be a normal from the reflecting surface.\n"
              "   :type mirror: :class:`Vector`\n"
              "   :return: The reflected vector matching the size of this vector.\n"
              "   :rtype: :class:`Vector`\n");
 static PyObject *Vector_reflect(VectorObject *self, PyObject *value)
 {
   int value_size;
   float mirror[3], vec[3];
   float reflect[3] = {0.0f};
   float tvec[MAX_DIMENSIONS];
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if ((value_size = mathutils_array_parse(
            tvec, 2, 4, value, "Vector.reflect(other), invalid 'other' arg")) == -1) {
     return NULL;
   }
 
   if (self->size < 2 || self->size > 4) {
     PyErr_SetString(PyExc_ValueError, "Vector must be 2D, 3D or 4D");
     return NULL;
   }
 
   mirror[0] = tvec[0];
   mirror[1] = tvec[1];
   mirror[2] = (value_size > 2) ? tvec[2] : 0.0f;
 
   vec[0] = self->vec[0];
   vec[1] = self->vec[1];
   vec[2] = (value_size > 2) ? self->vec[2] : 0.0f;
 
   normalize_v3(mirror);
   reflect_v3_v3v3(reflect, vec, mirror);
 
   return Vector_CreatePyObject(reflect, self->size, Py_TYPE(self));
 }
 
 PyDoc_STRVAR(Vector_cross_doc,
              ".. method:: cross(other)\n"
              "\n"
              "   Return the cross product of this vector and another.\n"
              "\n"
              "   :arg other: The other vector to perform the cross product with.\n"
              "   :type other: :class:`Vector`\n"
              "   :return: The cross product.\n"
              "   :rtype: :class:`Vector` or float when 2D vectors are used\n"
              "\n"
              "   .. note:: both vectors must be 2D or 3D\n");
 static PyObject *Vector_cross(VectorObject *self, PyObject *value)
 {
   PyObject *ret;
   float tvec[3];
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if (self->size > 3) {
     PyErr_SetString(PyExc_ValueError, "Vector must be 2D or 3D");
     return NULL;
   }
 
   if (mathutils_array_parse(
           tvec, self->size, self->size, value, "Vector.cross(other), invalid 'other' arg") == -1) {
     return NULL;
   }
 
   if (self->size == 3) {
     ret = Vector_CreatePyObject(NULL, 3, Py_TYPE(self));
     cross_v3_v3v3(((VectorObject *)ret)->vec, self->vec, tvec);
   }
   else {
     /* size == 2 */
     ret = PyFloat_FromDouble(cross_v2v2(self->vec, tvec));
   }
   return ret;
 }
 
 PyDoc_STRVAR(Vector_dot_doc,
              ".. method:: dot(other)\n"
              "\n"
              "   Return the dot product of this vector and another.\n"
              "\n"
              "   :arg other: The other vector to perform the dot product with.\n"
              "   :type other: :class:`Vector`\n"
              "   :return: The dot product.\n"
              "   :rtype: float\n");
 static PyObject *Vector_dot(VectorObject *self, PyObject *value)
 {
   float *tvec;
   PyObject *ret;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if (mathutils_array_parse_alloc(
           &tvec, self->size, value, "Vector.dot(other), invalid 'other' arg") == -1) {
     return NULL;
   }
 
   ret = PyFloat_FromDouble(dot_vn_vn(self->vec, tvec, self->size));
   PyMem_Free(tvec);
   return ret;
 }
 
 PyDoc_STRVAR(
     Vector_angle_doc,
     ".. function:: angle(other, fallback=None)\n"
     "\n"
     "   Return the angle between two vectors.\n"
     "\n"
     "   :arg other: another vector to compare the angle with\n"
     "   :type other: :class:`Vector`\n"
     "   :arg fallback: return this when the angle can't be calculated (zero length vector),\n"
     "      (instead of raising a :exc:`ValueError`).\n"
     "   :type fallback: any\n"
     "   :return: angle in radians or fallback when given\n"
     "   :rtype: float\n");
 static PyObject *Vector_angle(VectorObject *self, PyObject *args)
 {
   const int size = MIN2(self->size, 3); /* 4D angle makes no sense */
   float tvec[MAX_DIMENSIONS];
   PyObject *value;
   double dot = 0.0f, dot_self = 0.0f, dot_other = 0.0f;
   int x;
   PyObject *fallback = NULL;
 
   if (!PyArg_ParseTuple(args, "O|O:angle", &value, &fallback)) {
     return NULL;
   }
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   /* don't use clamped size, rule of thumb is vector sizes must match,
    * even though n this case 'w' is ignored */
   if (mathutils_array_parse(
           tvec, self->size, self->size, value, "Vector.angle(other), invalid 'other' arg") == -1) {
     return NULL;
   }
 
   if (self->size > 4) {
     PyErr_SetString(PyExc_ValueError, "Vector must be 2D, 3D or 4D");
     return NULL;
   }
 
   for (x = 0; x < size; x++) {
     dot_self += (double)self->vec[x] * (double)self->vec[x];
     dot_other += (double)tvec[x] * (double)tvec[x];
     dot += (double)self->vec[x] * (double)tvec[x];
   }
 
   if (!dot_self || !dot_other) {
     /* avoid exception */
     if (fallback) {
       Py_INCREF(fallback);
       return fallback;
     }
     else {
       PyErr_SetString(PyExc_ValueError,
                       "Vector.angle(other): "
                       "zero length vectors have no valid angle");
       return NULL;
     }
   }
 
   return PyFloat_FromDouble(saacos(dot / (sqrt(dot_self) * sqrt(dot_other))));
 }
 
 PyDoc_STRVAR(
     Vector_angle_signed_doc,
     ".. function:: angle_signed(other, fallback)\n"
     "\n"
     "   Return the signed angle between two 2D vectors (clockwise is positive).\n"
     "\n"
     "   :arg other: another vector to compare the angle with\n"
     "   :type other: :class:`Vector`\n"
     "   :arg fallback: return this when the angle can't be calculated (zero length vector),\n"
     "      (instead of raising a :exc:`ValueError`).\n"
     "   :type fallback: any\n"
     "   :return: angle in radians or fallback when given\n"
     "   :rtype: float\n");
 static PyObject *Vector_angle_signed(VectorObject *self, PyObject *args)
 {
   float tvec[2];
 
   PyObject *value;
   PyObject *fallback = NULL;
 
   if (!PyArg_ParseTuple(args, "O|O:angle_signed", &value, &fallback)) {
     return NULL;
   }
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if (mathutils_array_parse(
           tvec, 2, 2, value, "Vector.angle_signed(other), invalid 'other' arg") == -1) {
     return NULL;
   }
 
   if (self->size != 2) {
     PyErr_SetString(PyExc_ValueError, "Vector must be 2D");
     return NULL;
   }
 
   if (is_zero_v2(self->vec) || is_zero_v2(tvec)) {
     /* avoid exception */
     if (fallback) {
       Py_INCREF(fallback);
       return fallback;
     }
     else {
       PyErr_SetString(PyExc_ValueError,
                       "Vector.angle_signed(other): "
                       "zero length vectors have no valid angle");
       return NULL;
     }
   }
 
   return PyFloat_FromDouble(angle_signed_v2v2(self->vec, tvec));
 }
 
 PyDoc_STRVAR(Vector_rotation_difference_doc,
              ".. function:: rotation_difference(other)\n"
              "\n"
              "   Returns a quaternion representing the rotational difference between this\n"
              "   vector and another.\n"
              "\n"
              "   :arg other: second vector.\n"
              "   :type other: :class:`Vector`\n"
              "   :return: the rotational difference between the two vectors.\n"
              "   :rtype: :class:`Quaternion`\n"
              "\n"
              "   .. note:: 2D vectors raise an :exc:`AttributeError`.\n");
 static PyObject *Vector_rotation_difference(VectorObject *self, PyObject *value)
 {
   float quat[4], vec_a[3], vec_b[3];
 
   if (self->size < 3 || self->size > 4) {
     PyErr_SetString(PyExc_ValueError,
                     "vec.difference(value): "
                     "expects both vectors to be size 3 or 4");
     return NULL;
   }
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if (mathutils_array_parse(
           vec_b, 3, MAX_DIMENSIONS, value, "Vector.difference(other), invalid 'other' arg") ==
       -1) {
     return NULL;
   }
 
   normalize_v3_v3(vec_a, self->vec);
   normalize_v3(vec_b);
 
   rotation_between_vecs_to_quat(quat, vec_a, vec_b);
 
   return Quaternion_CreatePyObject(quat, NULL);
 }
 
 PyDoc_STRVAR(Vector_project_doc,
              ".. function:: project(other)\n"
              "\n"
              "   Return the projection of this vector onto the *other*.\n"
              "\n"
              "   :arg other: second vector.\n"
              "   :type other: :class:`Vector`\n"
              "   :return: the parallel projection vector\n"
              "   :rtype: :class:`Vector`\n");
 static PyObject *Vector_project(VectorObject *self, PyObject *value)
 {
   const int size = self->size;
   float *tvec;
   double dot = 0.0f, dot2 = 0.0f;
   int x;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if (mathutils_array_parse_alloc(
           &tvec, size, value, "Vector.project(other), invalid 'other' arg") == -1) {
     return NULL;
   }
 
   /* get dot products */
   for (x = 0; x < size; x++) {
     dot += (double)(self->vec[x] * tvec[x]);
     dot2 += (double)(tvec[x] * tvec[x]);
   }
   /* projection */
   dot /= dot2;
   for (x = 0; x < size; x++) {
     tvec[x] *= (float)dot;
   }
   return Vector_CreatePyObject_alloc(tvec, size, Py_TYPE(self));
 }
 
 PyDoc_STRVAR(Vector_lerp_doc,
              ".. function:: lerp(other, factor)\n"
              "\n"
              "   Returns the interpolation of two vectors.\n"
              "\n"
              "   :arg other: value to interpolate with.\n"
              "   :type other: :class:`Vector`\n"
              "   :arg factor: The interpolation value in [0.0, 1.0].\n"
              "   :type factor: float\n"
              "   :return: The interpolated vector.\n"
              "   :rtype: :class:`Vector`\n");
 static PyObject *Vector_lerp(VectorObject *self, PyObject *args)
 {
   const int size = self->size;
   PyObject *value = NULL;
   float fac;
   float *tvec;
 
   if (!PyArg_ParseTuple(args, "Of:lerp", &value, &fac)) {
     return NULL;
   }
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if (mathutils_array_parse_alloc(&tvec, size, value, "Vector.lerp(other), invalid 'other' arg") ==
       -1) {
     return NULL;
   }
 
   interp_vn_vn(tvec, self->vec, 1.0f - fac, size);
 
   return Vector_CreatePyObject_alloc(tvec, size, Py_TYPE(self));
 }
 
 PyDoc_STRVAR(Vector_slerp_doc,
              ".. function:: slerp(other, factor, fallback=None)\n"
              "\n"
              "   Returns the interpolation of two non-zero vectors (spherical coordinates).\n"
              "\n"
              "   :arg other: value to interpolate with.\n"
              "   :type other: :class:`Vector`\n"
              "   :arg factor: The interpolation value typically in [0.0, 1.0].\n"
              "   :type factor: float\n"
              "   :arg fallback: return this when the vector can't be calculated (zero length "
              "vector or direct opposites),\n"
              "      (instead of raising a :exc:`ValueError`).\n"
              "   :type fallback: any\n"
              "   :return: The interpolated vector.\n"
              "   :rtype: :class:`Vector`\n");
 static PyObject *Vector_slerp(VectorObject *self, PyObject *args)
 {
   const int size = self->size;
   PyObject *value = NULL;
   float fac, cosom, w[2];
   float self_vec[3], other_vec[3], ret_vec[3];
   float self_len_sq, other_len_sq;
   int x;
   PyObject *fallback = NULL;
 
   if (!PyArg_ParseTuple(args, "Of|O:slerp", &value, &fac, &fallback)) {
     return NULL;
   }
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   if (self->size > 3) {
     PyErr_SetString(PyExc_ValueError, "Vector must be 2D or 3D");
     return NULL;
   }
 
   if (mathutils_array_parse(
           other_vec, size, size, value, "Vector.slerp(other), invalid 'other' arg") == -1) {
     return NULL;
   }
 
   self_len_sq = normalize_vn_vn(self_vec, self->vec, size);
   other_len_sq = normalize_vn(other_vec, size);
 
   /* use fallbacks for zero length vectors */
   if (UNLIKELY((self_len_sq < FLT_EPSILON) || (other_len_sq < FLT_EPSILON))) {
     /* avoid exception */
     if (fallback) {
       Py_INCREF(fallback);
       return fallback;
     }
     else {
       PyErr_SetString(PyExc_ValueError,
                       "Vector.slerp(): "
                       "zero length vectors unsupported");
       return NULL;
     }
   }
 
   /* We have sane state, execute slerp */
   cosom = (float)dot_vn_vn(self_vec, other_vec, size);
 
   /* direct opposite, can't slerp */
   if (UNLIKELY(cosom < (-1.0f + FLT_EPSILON))) {
     /* avoid exception */
     if (fallback) {
       Py_INCREF(fallback);
       return fallback;
     }
     else {
       PyErr_SetString(PyExc_ValueError,
                       "Vector.slerp(): "
                       "opposite vectors unsupported");
       return NULL;
     }
   }
 
   interp_dot_slerp(fac, cosom, w);
 
   for (x = 0; x < size; x++) {
     ret_vec[x] = (w[0] * self_vec[x]) + (w[1] * other_vec[x]);
   }
 
   return Vector_CreatePyObject(ret_vec, size, Py_TYPE(self));
 }
 
 PyDoc_STRVAR(
     Vector_rotate_doc,
     ".. function:: rotate(other)\n"
     "\n"
     "   Rotate the vector by a rotation value.\n"
     "\n"
     "   .. note:: 2D vectors are a special case that can only be rotated by a 2x2 matrix.\n"
     "\n"
     "   :arg other: rotation component of mathutils value\n"
     "   :type other: :class:`Euler`, :class:`Quaternion` or :class:`Matrix`\n");
 static PyObject *Vector_rotate(VectorObject *self, PyObject *value)
 {
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return NULL;
   }
 
   if (self->size == 2) {
     /* Special case for 2D Vector with 2x2 matrix, so we avoid resizing it to a 3x3. */
     float other_rmat[2][2];
     MatrixObject *pymat;
     if (!Matrix_Parse2x2(value, &pymat)) {
       return NULL;
     }
     normalize_m2_m2(other_rmat, (const float(*)[2])pymat->matrix);
     /* Equivalent to a rotation along the Z axis. */
     mul_m2_v2(other_rmat, self->vec);
   }
   else {
     float other_rmat[3][3];
 
     if (mathutils_any_to_rotmat(other_rmat, value, "Vector.rotate(value)") == -1) {
       return NULL;
     }
 
     mul_m3_v3(other_rmat, self->vec);
   }
 
   (void)BaseMath_WriteCallback(self);
   Py_RETURN_NONE;
 }
 
 PyDoc_STRVAR(Vector_copy_doc,
              ".. function:: copy()\n"
              "\n"
              "   Returns a copy of this vector.\n"
              "\n"
              "   :return: A copy of the vector.\n"
              "   :rtype: :class:`Vector`\n"
              "\n"
              "   .. note:: use this to get a copy of a wrapped vector with\n"
              "      no reference to the original data.\n");
 static PyObject *Vector_copy(VectorObject *self)
 {
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   return Vector_CreatePyObject(self->vec, self->size, Py_TYPE(self));
 }
 static PyObject *Vector_deepcopy(VectorObject *self, PyObject *args)
 {
   if (!PyC_CheckArgs_DeepCopy(args)) {
     return NULL;
   }
   return Vector_copy(self);
 }
 
 static PyObject *Vector_repr(VectorObject *self)
 {
   PyObject *ret, *tuple;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   tuple = Vector_to_tuple_ex(self, -1);
   ret = PyUnicode_FromFormat("Vector(%R)", tuple);
   Py_DECREF(tuple);
   return ret;
 }
 
 #ifndef MATH_STANDALONE
 static PyObject *Vector_str(VectorObject *self)
 {
   int i;
 
   DynStr *ds;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   ds = BLI_dynstr_new();
 
   BLI_dynstr_append(ds, "<Vector (");
 
   for (i = 0; i < self->size; i++) {
     BLI_dynstr_appendf(ds, i ? ", %.4f" : "%.4f", self->vec[i]);
   }
 
   BLI_dynstr_append(ds, ")>");
 
   return mathutils_dynstr_to_py(ds); /* frees ds */
 }
 #endif
 
 /* Sequence Protocol */
 /* sequence length len(vector) */
 static int Vector_len(VectorObject *self)
 {
   return self->size;
 }
 /* sequence accessor (get): vector[index] */
 static PyObject *vector_item_internal(VectorObject *self, int i, const bool is_attr)
 {
   if (i < 0) {
     i = self->size - i;
   }
 
   if (i < 0 || i >= self->size) {
     if (is_attr) {
       PyErr_Format(PyExc_AttributeError,
                    "Vector.%c: unavailable on %dd vector",
                    *(((const char *)"xyzw") + i),
                    self->size);
     }
     else {
       PyErr_SetString(PyExc_IndexError, "vector[index]: out of range");
     }
     return NULL;
   }
 
   if (BaseMath_ReadIndexCallback(self, i) == -1) {
     return NULL;
   }
 
   return PyFloat_FromDouble(self->vec[i]);
 }
 
 static PyObject *Vector_item(VectorObject *self, int i)
 {
   return vector_item_internal(self, i, false);
 }
 /* sequence accessor (set): vector[index] = value */
 static int vector_ass_item_internal(VectorObject *self, int i, PyObject *value, const bool is_attr)
 {
   float scalar;
 
   if (BaseMath_Prepare_ForWrite(self) == -1) {
     return -1;
   }
 
   if ((scalar = PyFloat_AsDouble(value)) == -1.0f && PyErr_Occurred()) {
     /* parsed item not a number */
     PyErr_SetString(PyExc_TypeError,
                     "vector[index] = x: "
                     "assigned value not a number");
     return -1;
   }
 
   if (i < 0) {
     i = self->size - i;
   }
 
   if (i < 0 || i >= self->size) {
     if (is_attr) {
       PyErr_Format(PyExc_AttributeError,
                    "Vector.%c = x: unavailable on %dd vector",
                    *(((const char *)"xyzw") + i),
                    self->size);
     }
     else {
       PyErr_SetString(PyExc_IndexError,
                       "vector[index] = x: "
                       "assignment index out of range");
     }
     return -1;
   }
   self->vec[i] = scalar;
 
   if (BaseMath_WriteIndexCallback(self, i) == -1) {
     return -1;
   }
   return 0;
 }
 
 static int Vector_ass_item(VectorObject *self, int i, PyObject *value)
 {
   return vector_ass_item_internal(self, i, value, false);
 }
 
 /* sequence slice (get): vector[a:b] */
 static PyObject *Vector_slice(VectorObject *self, int begin, int end)
 {
   PyObject *tuple;
   int count;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   CLAMP(begin, 0, self->size);
   if (end < 0) {
     end = self->size + end + 1;
   }
   CLAMP(end, 0, self->size);
   begin = MIN2(begin, end);
 
   tuple = PyTuple_New(end - begin);
   for (count = begin; count < end; count++) {
     PyTuple_SET_ITEM(tuple, count - begin, PyFloat_FromDouble(self->vec[count]));
   }
 
   return tuple;
 }
 /* sequence slice (set): vector[a:b] = value */
 static int Vector_ass_slice(VectorObject *self, int begin, int end, PyObject *seq)
 {
   int size = 0;
   float *vec = NULL;
 
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return -1;
   }
 
   CLAMP(begin, 0, self->size);
   CLAMP(end, 0, self->size);
   begin = MIN2(begin, end);
 
   size = (end - begin);
   if (mathutils_array_parse_alloc(&vec, size, seq, "vector[begin:end] = [...]") == -1) {
     return -1;
   }
 
   if (vec == NULL) {
     PyErr_SetString(PyExc_MemoryError,
                     "vec[:] = seq: "
                     "problem allocating pointer space");
     return -1;
   }
 
   /*parsed well - now set in vector*/
   memcpy(self->vec + begin, vec, size * sizeof(float));
 
   PyMem_Free(vec);
 
   if (BaseMath_WriteCallback(self) == -1) {
     return -1;
   }
 
   return 0;
 }
 
 /* Numeric Protocols */
 /* addition: obj + obj */
 static PyObject *Vector_add(PyObject *v1, PyObject *v2)
 {
   VectorObject *vec1 = NULL, *vec2 = NULL;
   float *vec = NULL;
 
   if (!VectorObject_Check(v1) || !VectorObject_Check(v2)) {
     PyErr_Format(PyExc_AttributeError,
                  "Vector addition: (%s + %s) "
                  "invalid type for this operation",
                  Py_TYPE(v1)->tp_name,
                  Py_TYPE(v2)->tp_name);
     return NULL;
   }
   vec1 = (VectorObject *)v1;
   vec2 = (VectorObject *)v2;
 
   if (BaseMath_ReadCallback(vec1) == -1 || BaseMath_ReadCallback(vec2) == -1) {
     return NULL;
   }
 
   /*VECTOR + VECTOR*/
   if (vec1->size != vec2->size) {
     PyErr_SetString(PyExc_AttributeError,
                     "Vector addition: "
                     "vectors must have the same dimensions for this operation");
     return NULL;
   }
 
   vec = PyMem_Malloc(vec1->size * sizeof(float));
   if (vec == NULL) {
     PyErr_SetString(PyExc_MemoryError,
                     "Vector(): "
                     "problem allocating pointer space");
     return NULL;
   }
 
   add_vn_vnvn(vec, vec1->vec, vec2->vec, vec1->size);
 
   return Vector_CreatePyObject_alloc(vec, vec1->size, Py_TYPE(v1));
 }
 
 /* addition in-place: obj += obj */
 static PyObject *Vector_iadd(PyObject *v1, PyObject *v2)
 {
   VectorObject *vec1 = NULL, *vec2 = NULL;
 
   if (!VectorObject_Check(v1) || !VectorObject_Check(v2)) {
     PyErr_Format(PyExc_AttributeError,
                  "Vector addition: (%s += %s) "
                  "invalid type for this operation",
                  Py_TYPE(v1)->tp_name,
                  Py_TYPE(v2)->tp_name);
     return NULL;
   }
   vec1 = (VectorObject *)v1;
   vec2 = (VectorObject *)v2;
 
   if (vec1->size != vec2->size) {
     PyErr_SetString(PyExc_AttributeError,
                     "Vector addition: "
                     "vectors must have the same dimensions for this operation");
     return NULL;
   }
 
   if (BaseMath_ReadCallback_ForWrite(vec1) == -1 || BaseMath_ReadCallback(vec2) == -1) {
     return NULL;
   }
 
   add_vn_vn(vec1->vec, vec2->vec, vec1->size);
 
   (void)BaseMath_WriteCallback(vec1);
   Py_INCREF(v1);
   return v1;
 }
 
 /* subtraction: obj - obj */
 static PyObject *Vector_sub(PyObject *v1, PyObject *v2)
 {
   VectorObject *vec1 = NULL, *vec2 = NULL;
   float *vec;
 
   if (!VectorObject_Check(v1) || !VectorObject_Check(v2)) {
     PyErr_Format(PyExc_AttributeError,
                  "Vector subtraction: (%s - %s) "
                  "invalid type for this operation",
                  Py_TYPE(v1)->tp_name,
                  Py_TYPE(v2)->tp_name);
     return NULL;
   }
   vec1 = (VectorObject *)v1;
   vec2 = (VectorObject *)v2;
 
   if (BaseMath_ReadCallback(vec1) == -1 || BaseMath_ReadCallback(vec2) == -1) {
     return NULL;
   }
 
   if (vec1->size != vec2->size) {
     PyErr_SetString(PyExc_AttributeError,
                     "Vector subtraction: "
                     "vectors must have the same dimensions for this operation");
     return NULL;
   }
 
   vec = PyMem_Malloc(vec1->size * sizeof(float));
   if (vec == NULL) {
     PyErr_SetString(PyExc_MemoryError,
                     "Vector(): "
                     "problem allocating pointer space");
     return NULL;
   }
 
   sub_vn_vnvn(vec, vec1->vec, vec2->vec, vec1->size);
 
   return Vector_CreatePyObject_alloc(vec, vec1->size, Py_TYPE(v1));
 }
 
 /* subtraction in-place: obj -= obj */
 static PyObject *Vector_isub(PyObject *v1, PyObject *v2)
 {
   VectorObject *vec1 = NULL, *vec2 = NULL;
 
   if (!VectorObject_Check(v1) || !VectorObject_Check(v2)) {
     PyErr_Format(PyExc_AttributeError,
                  "Vector subtraction: (%s -= %s) "
                  "invalid type for this operation",
                  Py_TYPE(v1)->tp_name,
                  Py_TYPE(v2)->tp_name);
     return NULL;
   }
   vec1 = (VectorObject *)v1;
   vec2 = (VectorObject *)v2;
 
   if (vec1->size != vec2->size) {
     PyErr_SetString(PyExc_AttributeError,
                     "Vector subtraction: "
                     "vectors must have the same dimensions for this operation");
     return NULL;
   }
 
   if (BaseMath_ReadCallback_ForWrite(vec1) == -1 || BaseMath_ReadCallback(vec2) == -1) {
     return NULL;
   }
 
   sub_vn_vn(vec1->vec, vec2->vec, vec1->size);
 
   (void)BaseMath_WriteCallback(vec1);
   Py_INCREF(v1);
   return v1;
 }
 
 /*------------------------obj * obj------------------------------
  * multiplication */
 
 /**
  * Column vector multiplication (Matrix * Vector).
  * <pre>
  * [1][4][7]   [a]
  * [2][5][8] * [b]
  * [3][6][9]   [c]
  * </pre>
  *
  * \note Vector/Matrix multiplication is not commutative.
  * \note Assume read callbacks have been done first.
  */
 int column_vector_multiplication(float r_vec[MAX_DIMENSIONS], VectorObject *vec, MatrixObject *mat)
 {
   float vec_cpy[MAX_DIMENSIONS];
   int row, col, z = 0;
 
   if (mat->num_col != vec->size) {
     if (mat->num_col == 4 && vec->size == 3) {
       vec_cpy[3] = 1.0f;
     }
     else {
       PyErr_SetString(PyExc_ValueError,
                       "matrix * vector: "
                       "len(matrix.col) and len(vector) must be the same, "
                       "except for 4x4 matrix * 3D vector.");
       return -1;
     }
   }
 
   memcpy(vec_cpy, vec->vec, vec->size * sizeof(float));
 
   r_vec[3] = 1.0f;
 
   for (row = 0; row < mat->num_row; row++) {
     double dot = 0.0f;
     for (col = 0; col < mat->num_col; col++) {
       dot += (double)(MATRIX_ITEM(mat, row, col) * vec_cpy[col]);
     }
     r_vec[z++] = (float)dot;
   }
 
   return 0;
 }
 
 static PyObject *vector_mul_float(VectorObject *vec, const float scalar)
 {
   float *tvec = PyMem_Malloc(vec->size * sizeof(float));
   if (tvec == NULL) {
     PyErr_SetString(PyExc_MemoryError,
                     "vec * float: "
                     "problem allocating pointer space");
     return NULL;
   }
 
   mul_vn_vn_fl(tvec, vec->vec, vec->size, scalar);
   return Vector_CreatePyObject_alloc(tvec, vec->size, Py_TYPE(vec));
 }
 #ifdef USE_MATHUTILS_ELEM_MUL
 static PyObject *vector_mul_vec(VectorObject *vec1, VectorObject *vec2)
 {
   float *tvec = PyMem_Malloc(vec1->size * sizeof(float));
   if (tvec == NULL) {
     PyErr_SetString(PyExc_MemoryError,
                     "vec * vec: "
                     "problem allocating pointer space");
     return NULL;
   }
 
   mul_vn_vnvn(tvec, vec1->vec, vec2->vec, vec1->size);
   return Vector_CreatePyObject_alloc(tvec, vec1->size, Py_TYPE(vec1));
 }
 #endif
 static PyObject *Vector_mul(PyObject *v1, PyObject *v2)
 {
   VectorObject *vec1 = NULL, *vec2 = NULL;
   float scalar;
 
   if (VectorObject_Check(v1)) {
     vec1 = (VectorObject *)v1;
     if (BaseMath_ReadCallback(vec1) == -1) {
       return NULL;
     }
   }
   if (VectorObject_Check(v2)) {
     vec2 = (VectorObject *)v2;
     if (BaseMath_ReadCallback(vec2) == -1) {
       return NULL;
     }
   }
 
   /* Intentionally don't support (Quaternion) here, uses reverse order instead. */
 
   /* make sure v1 is always the vector */
   if (vec1 && vec2) {
 #ifdef USE_MATHUTILS_ELEM_MUL
     if (vec1->size != vec2->size) {
       PyErr_SetString(PyExc_ValueError,
                       "Vector multiplication: "
                       "vectors must have the same dimensions for this operation");
       return NULL;
     }
 
     /* element-wise product */
     return vector_mul_vec(vec1, vec2);
 #endif
   }
   else if (vec1) {
     if (((scalar = PyFloat_AsDouble(v2)) == -1.0f && PyErr_Occurred()) == 0) { /* VEC * FLOAT */
       return vector_mul_float(vec1, scalar);
     }
   }
   else if (vec2) {
     if (((scalar = PyFloat_AsDouble(v1)) == -1.0f && PyErr_Occurred()) == 0) { /* FLOAT * VEC */
       return vector_mul_float(vec2, scalar);
     }
   }
 
   PyErr_Format(PyExc_TypeError,
                "Element-wise multiplication: "
                "not supported between '%.200s' and '%.200s' types",
                Py_TYPE(v1)->tp_name,
                Py_TYPE(v2)->tp_name);
   return NULL;
 }
 
 /* multiplication in-place: obj *= obj */
 static PyObject *Vector_imul(PyObject *v1, PyObject *v2)
 {
   VectorObject *vec1 = NULL, *vec2 = NULL;
   float scalar;
 
   if (VectorObject_Check(v1)) {
     vec1 = (VectorObject *)v1;
     if (BaseMath_ReadCallback(vec1) == -1) {
       return NULL;
     }
   }
   if (VectorObject_Check(v2)) {
     vec2 = (VectorObject *)v2;
     if (BaseMath_ReadCallback(vec2) == -1) {
       return NULL;
     }
   }
 
   if (BaseMath_ReadCallback_ForWrite(vec1) == -1) {
     return NULL;
   }
 
   /* Intentionally don't support (Quaternion, Matrix) here, uses reverse order instead. */
 
   if (vec1 && vec2) {
 #ifdef USE_MATHUTILS_ELEM_MUL
     if (vec1->size != vec2->size) {
       PyErr_SetString(PyExc_ValueError,
                       "Vector multiplication: "
                       "vectors must have the same dimensions for this operation");
       return NULL;
     }
 
     /* element-wise product inplace */
     mul_vn_vn(vec1->vec, vec2->vec, vec1->size);
 #else
     PyErr_Format(PyExc_TypeError,
                  "In place element-wise multiplication: "
                  "not supported between '%.200s' and '%.200s' types",
                  Py_TYPE(v1)->tp_name,
                  Py_TYPE(v2)->tp_name);
     return NULL;
 #endif
   }
   else if (vec1 && (((scalar = PyFloat_AsDouble(v2)) == -1.0f && PyErr_Occurred()) ==
                     0)) { /* VEC *= FLOAT */
     mul_vn_fl(vec1->vec, vec1->size, scalar);
   }
   else {
     PyErr_Format(PyExc_TypeError,
                  "In place element-wise multiplication: "
                  "not supported between '%.200s' and '%.200s' types",
                  Py_TYPE(v1)->tp_name,
                  Py_TYPE(v2)->tp_name);
     return NULL;
   }
 
   (void)BaseMath_WriteCallback(vec1);
   Py_INCREF(v1);
   return v1;
 }
 
 static PyObject *Vector_matmul(PyObject *v1, PyObject *v2)
 {
   VectorObject *vec1 = NULL, *vec2 = NULL;
   int vec_size;
 
   if (VectorObject_Check(v1)) {
     vec1 = (VectorObject *)v1;
     if (BaseMath_ReadCallback(vec1) == -1) {
       return NULL;
     }
   }
   if (VectorObject_Check(v2)) {
     vec2 = (VectorObject *)v2;
     if (BaseMath_ReadCallback(vec2) == -1) {
       return NULL;
     }
   }
 
   /* Intentionally don't support (Quaternion) here, uses reverse order instead. */
 
   /* make sure v1 is always the vector */
   if (vec1 && vec2) {
     if (vec1->size != vec2->size) {
       PyErr_SetString(PyExc_ValueError,
                       "Vector multiplication: "
                       "vectors must have the same dimensions for this operation");
       return NULL;
     }
 
     /*dot product*/
     return PyFloat_FromDouble(dot_vn_vn(vec1->vec, vec2->vec, vec1->size));
   }
   else if (vec1) {
     if (MatrixObject_Check(v2)) {
       /* VEC @ MATRIX */
       float tvec[MAX_DIMENSIONS];
 
       if (BaseMath_ReadCallback((MatrixObject *)v2) == -1) {
         return NULL;
       }
       if (row_vector_multiplication(tvec, vec1, (MatrixObject *)v2) == -1) {
         return NULL;
       }
 
       if (((MatrixObject *)v2)->num_row == 4 && vec1->size == 3) {
         vec_size = 3;
       }
       else {
         vec_size = ((MatrixObject *)v2)->num_col;
       }
 
       return Vector_CreatePyObject(tvec, vec_size, Py_TYPE(vec1));
     }
   }
 
   PyErr_Format(PyExc_TypeError,
                "Vector multiplication: "
                "not supported between '%.200s' and '%.200s' types",
                Py_TYPE(v1)->tp_name,
                Py_TYPE(v2)->tp_name);
   return NULL;
 }
 
 static PyObject *Vector_imatmul(PyObject *v1, PyObject *v2)
 {
   PyErr_Format(PyExc_TypeError,
                "In place vector multiplication: "
                "not supported between '%.200s' and '%.200s' types",
                Py_TYPE(v1)->tp_name,
                Py_TYPE(v2)->tp_name);
   return NULL;
 }
 
 /* divid: obj / obj */
 static PyObject *Vector_div(PyObject *v1, PyObject *v2)
 {
   float *vec = NULL, scalar;
   VectorObject *vec1 = NULL;
 
   if (!VectorObject_Check(v1)) { /* not a vector */
     PyErr_SetString(PyExc_TypeError,
                     "Vector division: "
                     "Vector must be divided by a float");
     return NULL;
   }
   vec1 = (VectorObject *)v1; /* vector */
 
   if (BaseMath_ReadCallback(vec1) == -1) {
     return NULL;
   }
 
   if ((scalar = PyFloat_AsDouble(v2)) == -1.0f && PyErr_Occurred()) {
     /* parsed item not a number */
     PyErr_SetString(PyExc_TypeError,
                     "Vector division: "
                     "Vector must be divided by a float");
     return NULL;
   }
 
   if (scalar == 0.0f) {
     PyErr_SetString(PyExc_ZeroDivisionError,
                     "Vector division: "
                     "divide by zero error");
     return NULL;
   }
 
   vec = PyMem_Malloc(vec1->size * sizeof(float));
 
   if (vec == NULL) {
     PyErr_SetString(PyExc_MemoryError,
                     "vec / value: "
                     "problem allocating pointer space");
     return NULL;
   }
 
   mul_vn_vn_fl(vec, vec1->vec, vec1->size, 1.0f / scalar);
 
   return Vector_CreatePyObject_alloc(vec, vec1->size, Py_TYPE(v1));
 }
 
 /* divide in-place: obj /= obj */
 static PyObject *Vector_idiv(PyObject *v1, PyObject *v2)
 {
   float scalar;
   VectorObject *vec1 = (VectorObject *)v1;
 
   if (BaseMath_ReadCallback_ForWrite(vec1) == -1) {
     return NULL;
   }
 
   if ((scalar = PyFloat_AsDouble(v2)) == -1.0f && PyErr_Occurred()) {
     /* parsed item not a number */
     PyErr_SetString(PyExc_TypeError,
                     "Vector division: "
                     "Vector must be divided by a float");
     return NULL;
   }
 
   if (scalar == 0.0f) {
     PyErr_SetString(PyExc_ZeroDivisionError,
                     "Vector division: "
                     "divide by zero error");
     return NULL;
   }
 
   mul_vn_fl(vec1->vec, vec1->size, 1.0f / scalar);
 
   (void)BaseMath_WriteCallback(vec1);
 
   Py_INCREF(v1);
   return v1;
 }
 
 /* -obj
  * returns the negative of this object*/
 static PyObject *Vector_neg(VectorObject *self)
 {
   float *tvec;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   tvec = PyMem_Malloc(self->size * sizeof(float));
   negate_vn_vn(tvec, self->vec, self->size);
   return Vector_CreatePyObject_alloc(tvec, self->size, Py_TYPE(self));
 }
 
 /*------------------------tp_richcmpr
  * returns -1 exception, 0 false, 1 true */
 static PyObject *Vector_richcmpr(PyObject *objectA, PyObject *objectB, int comparison_type)
 {
   VectorObject *vecA = NULL, *vecB = NULL;
   int result = 0;
   double epsilon = 0.000001f;
   double lenA, lenB;
 
   if (!VectorObject_Check(objectA) || !VectorObject_Check(objectB)) {
     if (comparison_type == Py_NE) {
       Py_RETURN_TRUE;
     }
     else {
       Py_RETURN_FALSE;
     }
   }
   vecA = (VectorObject *)objectA;
   vecB = (VectorObject *)objectB;
 
   if (BaseMath_ReadCallback(vecA) == -1 || BaseMath_ReadCallback(vecB) == -1) {
     return NULL;
   }
 
   if (vecA->size != vecB->size) {
     if (comparison_type == Py_NE) {
       Py_RETURN_TRUE;
     }
     else {
       Py_RETURN_FALSE;
     }
   }
 
   switch (comparison_type) {
     case Py_LT:
       lenA = len_squared_vn(vecA->vec, vecA->size);
       lenB = len_squared_vn(vecB->vec, vecB->size);
       if (lenA < lenB) {
         result = 1;
       }
       break;
     case Py_LE:
       lenA = len_squared_vn(vecA->vec, vecA->size);
       lenB = len_squared_vn(vecB->vec, vecB->size);
       if (lenA < lenB) {
         result = 1;
       }
       else {
         result = (((lenA + epsilon) > lenB) && ((lenA - epsilon) < lenB));
       }
       break;
     case Py_EQ:
       result = EXPP_VectorsAreEqual(vecA->vec, vecB->vec, vecA->size, 1);
       break;
     case Py_NE:
       result = !EXPP_VectorsAreEqual(vecA->vec, vecB->vec, vecA->size, 1);
       break;
     case Py_GT:
       lenA = len_squared_vn(vecA->vec, vecA->size);
       lenB = len_squared_vn(vecB->vec, vecB->size);
       if (lenA > lenB) {
         result = 1;
       }
       break;
     case Py_GE:
       lenA = len_squared_vn(vecA->vec, vecA->size);
       lenB = len_squared_vn(vecB->vec, vecB->size);
       if (lenA > lenB) {
         result = 1;
       }
       else {
         result = (((lenA + epsilon) > lenB) && ((lenA - epsilon) < lenB));
       }
       break;
     default:
       printf("The result of the comparison could not be evaluated");
       break;
   }
   if (result == 1) {
     Py_RETURN_TRUE;
   }
   else {
     Py_RETURN_FALSE;
   }
 }
 
 static Py_hash_t Vector_hash(VectorObject *self)
 {
   if (BaseMath_ReadCallback(self) == -1) {
     return -1;
   }
 
   if (BaseMathObject_Prepare_ForHash(self) == -1) {
     return -1;
   }
 
   return mathutils_array_hash(self->vec, self->size);
 }
 
 /*-----------------PROTCOL DECLARATIONS--------------------------*/
 static PySequenceMethods Vector_SeqMethods = {
     (lenfunc)Vector_len,              /* sq_length */
     (binaryfunc)NULL,                 /* sq_concat */
     (ssizeargfunc)NULL,               /* sq_repeat */
     (ssizeargfunc)Vector_item,        /* sq_item */
     NULL,                             /* py3 deprecated slice func */
     (ssizeobjargproc)Vector_ass_item, /* sq_ass_item */
     NULL,                             /* py3 deprecated slice assign func */
     (objobjproc)NULL,                 /* sq_contains */
     (binaryfunc)NULL,                 /* sq_inplace_concat */
     (ssizeargfunc)NULL,               /* sq_inplace_repeat */
 };
 
 static PyObject *Vector_subscript(VectorObject *self, PyObject *item)
 {
   if (PyIndex_Check(item)) {
     Py_ssize_t i;
     i = PyNumber_AsSsize_t(item, PyExc_IndexError);
     if (i == -1 && PyErr_Occurred()) {
       return NULL;
     }
     if (i < 0) {
       i += self->size;
     }
     return Vector_item(self, i);
   }
   else if (PySlice_Check(item)) {
     Py_ssize_t start, stop, step, slicelength;
 
     if (PySlice_GetIndicesEx(item, self->size, &start, &stop, &step, &slicelength) < 0) {
       return NULL;
     }
 
     if (slicelength <= 0) {
       return PyTuple_New(0);
     }
     else if (step == 1) {
       return Vector_slice(self, start, stop);
     }
     else {
       PyErr_SetString(PyExc_IndexError, "slice steps not supported with vectors");
       return NULL;
     }
   }
   else {
     PyErr_Format(
         PyExc_TypeError, "vector indices must be integers, not %.200s", Py_TYPE(item)->tp_name);
     return NULL;
   }
 }
 
 static int Vector_ass_subscript(VectorObject *self, PyObject *item, PyObject *value)
 {
   if (PyIndex_Check(item)) {
     Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError);
     if (i == -1 && PyErr_Occurred()) {
       return -1;
     }
     if (i < 0) {
       i += self->size;
     }
     return Vector_ass_item(self, i, value);
   }
   else if (PySlice_Check(item)) {
     Py_ssize_t start, stop, step, slicelength;
 
     if (PySlice_GetIndicesEx(item, self->size, &start, &stop, &step, &slicelength) < 0) {
       return -1;
     }
 
     if (step == 1) {
       return Vector_ass_slice(self, start, stop, value);
     }
     else {
       PyErr_SetString(PyExc_IndexError, "slice steps not supported with vectors");
       return -1;
     }
   }
   else {
     PyErr_Format(
         PyExc_TypeError, "vector indices must be integers, not %.200s", Py_TYPE(item)->tp_name);
     return -1;
   }
 }
 
 static PyMappingMethods Vector_AsMapping = {
     (lenfunc)Vector_len,
     (binaryfunc)Vector_subscript,
     (objobjargproc)Vector_ass_subscript,
 };
 
 static PyNumberMethods Vector_NumMethods = {
     (binaryfunc)Vector_add,     /*nb_add*/
     (binaryfunc)Vector_sub,     /*nb_subtract*/
     (binaryfunc)Vector_mul,     /*nb_multiply*/
     NULL,                       /*nb_remainder*/
     NULL,                       /*nb_divmod*/
     NULL,                       /*nb_power*/
     (unaryfunc)Vector_neg,      /*nb_negative*/
     (unaryfunc)Vector_copy,     /*tp_positive*/
     (unaryfunc)NULL,            /*tp_absolute*/
     (inquiry)NULL,              /*tp_bool*/
     (unaryfunc)NULL,            /*nb_invert*/
     NULL,                       /*nb_lshift*/
     (binaryfunc)NULL,           /*nb_rshift*/
     NULL,                       /*nb_and*/
     NULL,                       /*nb_xor*/
     NULL,                       /*nb_or*/
     NULL,                       /*nb_int*/
     NULL,                       /*nb_reserved*/
     NULL,                       /*nb_float*/
     Vector_iadd,                /* nb_inplace_add */
     Vector_isub,                /* nb_inplace_subtract */
     Vector_imul,                /* nb_inplace_multiply */
     NULL,                       /* nb_inplace_remainder */
     NULL,                       /* nb_inplace_power */
     NULL,                       /* nb_inplace_lshift */
     NULL,                       /* nb_inplace_rshift */
     NULL,                       /* nb_inplace_and */
     NULL,                       /* nb_inplace_xor */
     NULL,                       /* nb_inplace_or */
     NULL,                       /* nb_floor_divide */
     Vector_div,                 /* nb_true_divide */
     NULL,                       /* nb_inplace_floor_divide */
     Vector_idiv,                /* nb_inplace_true_divide */
     NULL,                       /* nb_index */
     (binaryfunc)Vector_matmul,  /* nb_matrix_multiply */
     (binaryfunc)Vector_imatmul, /* nb_inplace_matrix_multiply */
 };
 
 /*------------------PY_OBECT DEFINITION--------------------------*/
 
 /* vector axis, vector.x/y/z/w */
 
 PyDoc_STRVAR(Vector_axis_x_doc, "Vector X axis.\n\n:type: float");
 PyDoc_STRVAR(Vector_axis_y_doc, "Vector Y axis.\n\n:type: float");
 PyDoc_STRVAR(Vector_axis_z_doc, "Vector Z axis (3D Vectors only).\n\n:type: float");
 PyDoc_STRVAR(Vector_axis_w_doc, "Vector W axis (4D Vectors only).\n\n:type: float");
 
 static PyObject *Vector_axis_get(VectorObject *self, void *type)
 {
   return vector_item_internal(self, POINTER_AS_INT(type), true);
 }
 
 static int Vector_axis_set(VectorObject *self, PyObject *value, void *type)
 {
   return vector_ass_item_internal(self, POINTER_AS_INT(type), value, true);
 }
 
 /* vector.length */
 
 PyDoc_STRVAR(Vector_length_doc, "Vector Length.\n\n:type: float");
 static PyObject *Vector_length_get(VectorObject *self, void *UNUSED(closure))
 {
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   return PyFloat_FromDouble(sqrt(dot_vn_vn(self->vec, self->vec, self->size)));
 }
 
 static int Vector_length_set(VectorObject *self, PyObject *value)
 {
   double dot = 0.0f, param;
 
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return -1;
   }
 
   if ((param = PyFloat_AsDouble(value)) == -1.0 && PyErr_Occurred()) {
     PyErr_SetString(PyExc_TypeError, "length must be set to a number");
     return -1;
   }
 
   if (param < 0.0) {
     PyErr_SetString(PyExc_ValueError, "cannot set a vectors length to a negative value");
     return -1;
   }
   if (param == 0.0) {
     copy_vn_fl(self->vec, self->size, 0.0f);
     return 0;
   }
 
   dot = dot_vn_vn(self->vec, self->vec, self->size);
 
   if (!dot) {
     /* cant sqrt zero */
     return 0;
   }
 
   dot = sqrt(dot);
 
   if (dot == param) {
     return 0;
   }
 
   dot = dot / param;
 
   mul_vn_fl(self->vec, self->size, 1.0 / dot);
 
   (void)BaseMath_WriteCallback(self); /* checked already */
 
   return 0;
 }
 
 /* vector.length_squared */
 PyDoc_STRVAR(Vector_length_squared_doc, "Vector length squared (v.dot(v)).\n\n:type: float");
 static PyObject *Vector_length_squared_get(VectorObject *self, void *UNUSED(closure))
 {
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   return PyFloat_FromDouble(dot_vn_vn(self->vec, self->vec, self->size));
 }
 
 /**
  * Python script used to make swizzle array:
  *
  * \code{.py}
  * SWIZZLE_BITS_PER_AXIS = 3
  * SWIZZLE_VALID_AXIS = 0x4
  *
  * axis_dict = {}
  * axis_pos = {'x': 0, 'y': 1, 'z': 2, 'w': 3}
  * axis_chars = 'xyzw'
  * while len(axis_chars) >= 2:
  *     for axis_0 in axis_chars:
  *         axis_0_pos = axis_pos[axis_0]
  *         for axis_1 in axis_chars:
  *             axis_1_pos = axis_pos[axis_1]
  *             axis_dict[axis_0 + axis_1] = (
  *                 '((%s | SWIZZLE_VALID_AXIS) | '
  *                 '((%s | SWIZZLE_VALID_AXIS) << SWIZZLE_BITS_PER_AXIS))' %
  *                 (axis_0_pos, axis_1_pos))
  *             if len(axis_chars) > 2:
  *                 for axis_2 in axis_chars:
  *                     axis_2_pos = axis_pos[axis_2]
  *                     axis_dict[axis_0 + axis_1 + axis_2] = (
  *                         '((%s | SWIZZLE_VALID_AXIS) | '
  *                         '((%s | SWIZZLE_VALID_AXIS) << SWIZZLE_BITS_PER_AXIS) | '
  *                         '((%s | SWIZZLE_VALID_AXIS) << (SWIZZLE_BITS_PER_AXIS * 2)))' %
  *                         (axis_0_pos, axis_1_pos, axis_2_pos))
  *                     if len(axis_chars) > 3:
  *                         for axis_3 in axis_chars:
  *                             axis_3_pos = axis_pos[axis_3]
  *                             axis_dict[axis_0 + axis_1 + axis_2 + axis_3] = (
  *                                 '((%s | SWIZZLE_VALID_AXIS) | '
  *                                 '((%s | SWIZZLE_VALID_AXIS) << SWIZZLE_BITS_PER_AXIS) | '
  *                                 '((%s | SWIZZLE_VALID_AXIS) << (SWIZZLE_BITS_PER_AXIS * 2)) | '
  *                                 '((%s | SWIZZLE_VALID_AXIS) << (SWIZZLE_BITS_PER_AXIS * 3)))  '
  *                                 %
  *                                 (axis_0_pos, axis_1_pos, axis_2_pos, axis_3_pos))
  *
  *     axis_chars = axis_chars[:-1]
  * items = list(axis_dict.items())
  * items.sort(
  *     key=lambda a: a[0].replace('x', '0').replace('y', '1').replace('z', '2').replace('w', '3')
  * )
  *
  * unique = set()
  * for key, val in items:
  *     num = eval(val)
  *     set_str = 'Vector_swizzle_set' if (len(set(key)) == len(key)) else 'NULL'
  *     key_args = ', '.join(["'%s'" % c for c in key.upper()])
  *     print('\t{"%s", %s(getter)Vector_swizzle_get, (setter)%s, NULL, SWIZZLE%d(%s)},' %
  *           (key, (' ' * (4 - len(key))), set_str, len(key), key_args))
  *     unique.add(num)
  *
  * if len(unique) != len(items):
  *     print("ERROR, duplicate values found")
  * \endcode
  */
 
 /**
  * Get a new Vector according to the provided swizzle bits.
  */
 static PyObject *Vector_swizzle_get(VectorObject *self, void *closure)
 {
   size_t axis_to;
   size_t axis_from;
   float vec[MAX_DIMENSIONS];
   uint swizzleClosure;
 
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   /* Unpack the axes from the closure into an array. */
   axis_to = 0;
   swizzleClosure = POINTER_AS_INT(closure);
   while (swizzleClosure & SWIZZLE_VALID_AXIS) {
     axis_from = swizzleClosure & SWIZZLE_AXIS;
     if (axis_from >= self->size) {
       PyErr_SetString(PyExc_AttributeError,
                       "Vector swizzle: "
                       "specified axis not present");
       return NULL;
     }
 
     vec[axis_to] = self->vec[axis_from];
     swizzleClosure = swizzleClosure >> SWIZZLE_BITS_PER_AXIS;
     axis_to++;
   }
 
   return Vector_CreatePyObject(vec, axis_to, Py_TYPE(self));
 }
 
 /**
  * Set the items of this vector using a swizzle.
  * - If value is a vector or list this operates like an array copy, except that
  *   the destination is effectively re-ordered as defined by the swizzle. At
  *   most min(len(source), len(dest)) values will be copied.
  * - If the value is scalar, it is copied to all axes listed in the swizzle.
  * - If an axis appears more than once in the swizzle, the final occurrence is
  *   the one that determines its value.
  *
  * \return 0 on success and -1 on failure. On failure, the vector will be unchanged.
  */
 static int Vector_swizzle_set(VectorObject *self, PyObject *value, void *closure)
 {
   size_t size_from;
   float scalarVal;
 
   size_t axis_from;
   size_t axis_to;
 
   uint swizzleClosure;
 
   float tvec[MAX_DIMENSIONS];
   float vec_assign[MAX_DIMENSIONS];
 
   if (BaseMath_ReadCallback_ForWrite(self) == -1) {
     return -1;
   }
 
   /* Check that the closure can be used with this vector: even 2D vectors have
    * swizzles defined for axes z and w, but they would be invalid. */
   swizzleClosure = POINTER_AS_INT(closure);
   axis_from = 0;
 
   while (swizzleClosure & SWIZZLE_VALID_AXIS) {
     axis_to = swizzleClosure & SWIZZLE_AXIS;
     if (axis_to >= self->size) {
       PyErr_SetString(PyExc_AttributeError,
                       "Vector swizzle: "
                       "specified axis not present");
       return -1;
     }
     swizzleClosure = swizzleClosure >> SWIZZLE_BITS_PER_AXIS;
     axis_from++;
   }
 
   if (((scalarVal = PyFloat_AsDouble(value)) == -1 && PyErr_Occurred()) == 0) {
     int i;
 
     for (i = 0; i < MAX_DIMENSIONS; i++) {
       vec_assign[i] = scalarVal;
     }
 
     size_from = axis_from;
   }
   else if (((void)PyErr_Clear()), /* run but ignore the result */
            (size_from = mathutils_array_parse(
                 vec_assign, 2, 4, value, "mathutils.Vector.**** = swizzle assignment")) == -1) {
     return -1;
   }
 
   if (axis_from != size_from) {
     PyErr_SetString(PyExc_AttributeError, "Vector swizzle: size does not match swizzle");
     return -1;
   }
 
   /* Copy vector contents onto swizzled axes. */
   axis_from = 0;
   swizzleClosure = POINTER_AS_INT(closure);
 
   /* We must first copy current vec into tvec, else some org values may be lost.
    * See [#31760].
    * Assuming self->size can't be higher than MAX_DIMENSIONS! */
   memcpy(tvec, self->vec, self->size * sizeof(float));
 
   while (swizzleClosure & SWIZZLE_VALID_AXIS) {
     axis_to = swizzleClosure & SWIZZLE_AXIS;
     tvec[axis_to] = vec_assign[axis_from];
     swizzleClosure = swizzleClosure >> SWIZZLE_BITS_PER_AXIS;
     axis_from++;
   }
 
   /* We must copy back the whole tvec into vec, else some changes may be lost (e.g. xz...).
    * See [#31760]. */
   memcpy(self->vec, tvec, self->size * sizeof(float));
   /* continue with BaseMathObject_WriteCallback at the end */
 
   if (BaseMath_WriteCallback(self) == -1) {
     return -1;
   }
   else {
     return 0;
   }
 }
 
 #define _SWIZZLE1(a) ((a) | SWIZZLE_VALID_AXIS)
 #define _SWIZZLE2(a, b) (_SWIZZLE1(a) | (((b) | SWIZZLE_VALID_AXIS) << (SWIZZLE_BITS_PER_AXIS)))
 #define _SWIZZLE3(a, b, c) \
   (_SWIZZLE2(a, b) | (((c) | SWIZZLE_VALID_AXIS) << (SWIZZLE_BITS_PER_AXIS * 2)))
 #define _SWIZZLE4(a, b, c, d) \
   (_SWIZZLE3(a, b, c) | (((d) | SWIZZLE_VALID_AXIS) << (SWIZZLE_BITS_PER_AXIS * 3)))
 
 #define SWIZZLE2(a, b) POINTER_FROM_INT(_SWIZZLE2(a, b))
 #define SWIZZLE3(a, b, c) POINTER_FROM_INT(_SWIZZLE3(a, b, c))
 #define SWIZZLE4(a, b, c, d) POINTER_FROM_INT(_SWIZZLE4(a, b, c, d))
 
 /*****************************************************************************/
 /* Python attributes get/set structure:                                      */
 /*****************************************************************************/
 static PyGetSetDef Vector_getseters[] = {
     {"x", (getter)Vector_axis_get, (setter)Vector_axis_set, Vector_axis_x_doc, (void *)0},
     {"y", (getter)Vector_axis_get, (setter)Vector_axis_set, Vector_axis_y_doc, (void *)1},
     {"z", (getter)Vector_axis_get, (setter)Vector_axis_set, Vector_axis_z_doc, (void *)2},
     {"w", (getter)Vector_axis_get, (setter)Vector_axis_set, Vector_axis_w_doc, (void *)3},
     {"length", (getter)Vector_length_get, (setter)Vector_length_set, Vector_length_doc, NULL},
     {"length_squared",
      (getter)Vector_length_squared_get,
      (setter)NULL,
      Vector_length_squared_doc,
      NULL},
     {"magnitude", (getter)Vector_length_get, (setter)Vector_length_set, Vector_length_doc, NULL},
     {"is_wrapped",
      (getter)BaseMathObject_is_wrapped_get,
      (setter)NULL,
      BaseMathObject_is_wrapped_doc,
      NULL},
     {"is_frozen",
      (getter)BaseMathObject_is_frozen_get,
      (setter)NULL,
      BaseMathObject_is_frozen_doc,
      NULL},
     {"owner", (getter)BaseMathObject_owner_get, (setter)NULL, BaseMathObject_owner_doc, NULL},
 
     /* autogenerated swizzle attrs, see Python script above */
     {"xx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE2(0, 0)},
     {"xxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(0, 0, 0)},
     {"xxxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 0, 0, 0)},
     {"xxxy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 0, 0, 1)},
     {"xxxz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 0, 0, 2)},
     {"xxxw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 0, 0, 3)},
     {"xxy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(0, 0, 1)},
     {"xxyx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 0, 1, 0)},
     {"xxyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 0, 1, 1)},
     {"xxyz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 0, 1, 2)},
     {"xxyw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 0, 1, 3)},
     {"xxz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(0, 0, 2)},
     {"xxzx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 0, 2, 0)},
     {"xxzy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 0, 2, 1)},
     {"xxzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 0, 2, 2)},
     {"xxzw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 0, 2, 3)},
     {"xxw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(0, 0, 3)},
     {"xxwx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 0, 3, 0)},
     {"xxwy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 0, 3, 1)},
     {"xxwz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 0, 3, 2)},
     {"xxww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 0, 3, 3)},
     {"xy", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE2(0, 1)},
     {"xyx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(0, 1, 0)},
     {"xyxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 1, 0, 0)},
     {"xyxy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 1, 0, 1)},
     {"xyxz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 1, 0, 2)},
     {"xyxw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 1, 0, 3)},
     {"xyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(0, 1, 1)},
     {"xyyx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 1, 1, 0)},
     {"xyyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 1, 1, 1)},
     {"xyyz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 1, 1, 2)},
     {"xyyw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 1, 1, 3)},
     {"xyz", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(0, 1, 2)},
     {"xyzx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 1, 2, 0)},
     {"xyzy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 1, 2, 1)},
     {"xyzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 1, 2, 2)},
     {"xyzw", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(0, 1, 2, 3)},
     {"xyw", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(0, 1, 3)},
     {"xywx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 1, 3, 0)},
     {"xywy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 1, 3, 1)},
     {"xywz", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(0, 1, 3, 2)},
     {"xyww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 1, 3, 3)},
     {"xz", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE2(0, 2)},
     {"xzx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(0, 2, 0)},
     {"xzxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 2, 0, 0)},
     {"xzxy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 2, 0, 1)},
     {"xzxz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 2, 0, 2)},
     {"xzxw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 2, 0, 3)},
     {"xzy", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(0, 2, 1)},
     {"xzyx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 2, 1, 0)},
     {"xzyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 2, 1, 1)},
     {"xzyz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 2, 1, 2)},
     {"xzyw", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(0, 2, 1, 3)},
     {"xzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(0, 2, 2)},
     {"xzzx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 2, 2, 0)},
     {"xzzy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 2, 2, 1)},
     {"xzzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 2, 2, 2)},
     {"xzzw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 2, 2, 3)},
     {"xzw", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(0, 2, 3)},
     {"xzwx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 2, 3, 0)},
     {"xzwy", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(0, 2, 3, 1)},
     {"xzwz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 2, 3, 2)},
     {"xzww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 2, 3, 3)},
     {"xw", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE2(0, 3)},
     {"xwx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(0, 3, 0)},
     {"xwxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 3, 0, 0)},
     {"xwxy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 3, 0, 1)},
     {"xwxz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 3, 0, 2)},
     {"xwxw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 3, 0, 3)},
     {"xwy", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(0, 3, 1)},
     {"xwyx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 3, 1, 0)},
     {"xwyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 3, 1, 1)},
     {"xwyz", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(0, 3, 1, 2)},
     {"xwyw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 3, 1, 3)},
     {"xwz", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(0, 3, 2)},
     {"xwzx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 3, 2, 0)},
     {"xwzy", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(0, 3, 2, 1)},
     {"xwzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 3, 2, 2)},
     {"xwzw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 3, 2, 3)},
     {"xww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(0, 3, 3)},
     {"xwwx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 3, 3, 0)},
     {"xwwy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 3, 3, 1)},
     {"xwwz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 3, 3, 2)},
     {"xwww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(0, 3, 3, 3)},
     {"yx", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE2(1, 0)},
     {"yxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(1, 0, 0)},
     {"yxxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 0, 0, 0)},
     {"yxxy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 0, 0, 1)},
     {"yxxz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 0, 0, 2)},
     {"yxxw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 0, 0, 3)},
     {"yxy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(1, 0, 1)},
     {"yxyx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 0, 1, 0)},
     {"yxyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 0, 1, 1)},
     {"yxyz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 0, 1, 2)},
     {"yxyw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 0, 1, 3)},
     {"yxz", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(1, 0, 2)},
     {"yxzx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 0, 2, 0)},
     {"yxzy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 0, 2, 1)},
     {"yxzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 0, 2, 2)},
     {"yxzw", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(1, 0, 2, 3)},
     {"yxw", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(1, 0, 3)},
     {"yxwx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 0, 3, 0)},
     {"yxwy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 0, 3, 1)},
     {"yxwz", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(1, 0, 3, 2)},
     {"yxww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 0, 3, 3)},
     {"yy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE2(1, 1)},
     {"yyx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(1, 1, 0)},
     {"yyxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 1, 0, 0)},
     {"yyxy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 1, 0, 1)},
     {"yyxz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 1, 0, 2)},
     {"yyxw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 1, 0, 3)},
     {"yyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(1, 1, 1)},
     {"yyyx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 1, 1, 0)},
     {"yyyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 1, 1, 1)},
     {"yyyz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 1, 1, 2)},
     {"yyyw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 1, 1, 3)},
     {"yyz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(1, 1, 2)},
     {"yyzx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 1, 2, 0)},
     {"yyzy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 1, 2, 1)},
     {"yyzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 1, 2, 2)},
     {"yyzw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 1, 2, 3)},
     {"yyw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(1, 1, 3)},
     {"yywx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 1, 3, 0)},
     {"yywy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 1, 3, 1)},
     {"yywz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 1, 3, 2)},
     {"yyww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 1, 3, 3)},
     {"yz", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE2(1, 2)},
     {"yzx", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(1, 2, 0)},
     {"yzxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 2, 0, 0)},
     {"yzxy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 2, 0, 1)},
     {"yzxz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 2, 0, 2)},
     {"yzxw", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(1, 2, 0, 3)},
     {"yzy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(1, 2, 1)},
     {"yzyx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 2, 1, 0)},
     {"yzyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 2, 1, 1)},
     {"yzyz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 2, 1, 2)},
     {"yzyw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 2, 1, 3)},
     {"yzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(1, 2, 2)},
     {"yzzx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 2, 2, 0)},
     {"yzzy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 2, 2, 1)},
     {"yzzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 2, 2, 2)},
     {"yzzw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 2, 2, 3)},
     {"yzw", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(1, 2, 3)},
     {"yzwx", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(1, 2, 3, 0)},
     {"yzwy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 2, 3, 1)},
     {"yzwz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 2, 3, 2)},
     {"yzww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 2, 3, 3)},
     {"yw", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE2(1, 3)},
     {"ywx", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(1, 3, 0)},
     {"ywxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 3, 0, 0)},
     {"ywxy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 3, 0, 1)},
     {"ywxz", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(1, 3, 0, 2)},
     {"ywxw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 3, 0, 3)},
     {"ywy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(1, 3, 1)},
     {"ywyx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 3, 1, 0)},
     {"ywyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 3, 1, 1)},
     {"ywyz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 3, 1, 2)},
     {"ywyw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 3, 1, 3)},
     {"ywz", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(1, 3, 2)},
     {"ywzx", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(1, 3, 2, 0)},
     {"ywzy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 3, 2, 1)},
     {"ywzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 3, 2, 2)},
     {"ywzw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 3, 2, 3)},
     {"yww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(1, 3, 3)},
     {"ywwx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 3, 3, 0)},
     {"ywwy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 3, 3, 1)},
     {"ywwz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 3, 3, 2)},
     {"ywww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(1, 3, 3, 3)},
     {"zx", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE2(2, 0)},
     {"zxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(2, 0, 0)},
     {"zxxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 0, 0, 0)},
     {"zxxy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 0, 0, 1)},
     {"zxxz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 0, 0, 2)},
     {"zxxw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 0, 0, 3)},
     {"zxy", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(2, 0, 1)},
     {"zxyx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 0, 1, 0)},
     {"zxyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 0, 1, 1)},
     {"zxyz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 0, 1, 2)},
     {"zxyw", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(2, 0, 1, 3)},
     {"zxz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(2, 0, 2)},
     {"zxzx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 0, 2, 0)},
     {"zxzy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 0, 2, 1)},
     {"zxzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 0, 2, 2)},
     {"zxzw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 0, 2, 3)},
     {"zxw", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(2, 0, 3)},
     {"zxwx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 0, 3, 0)},
     {"zxwy", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(2, 0, 3, 1)},
     {"zxwz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 0, 3, 2)},
     {"zxww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 0, 3, 3)},
     {"zy", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE2(2, 1)},
     {"zyx", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(2, 1, 0)},
     {"zyxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 1, 0, 0)},
     {"zyxy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 1, 0, 1)},
     {"zyxz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 1, 0, 2)},
     {"zyxw", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(2, 1, 0, 3)},
     {"zyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(2, 1, 1)},
     {"zyyx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 1, 1, 0)},
     {"zyyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 1, 1, 1)},
     {"zyyz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 1, 1, 2)},
     {"zyyw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 1, 1, 3)},
     {"zyz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(2, 1, 2)},
     {"zyzx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 1, 2, 0)},
     {"zyzy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 1, 2, 1)},
     {"zyzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 1, 2, 2)},
     {"zyzw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 1, 2, 3)},
     {"zyw", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(2, 1, 3)},
     {"zywx", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(2, 1, 3, 0)},
     {"zywy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 1, 3, 1)},
     {"zywz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 1, 3, 2)},
     {"zyww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 1, 3, 3)},
     {"zz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE2(2, 2)},
     {"zzx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(2, 2, 0)},
     {"zzxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 2, 0, 0)},
     {"zzxy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 2, 0, 1)},
     {"zzxz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 2, 0, 2)},
     {"zzxw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 2, 0, 3)},
     {"zzy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(2, 2, 1)},
     {"zzyx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 2, 1, 0)},
     {"zzyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 2, 1, 1)},
     {"zzyz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 2, 1, 2)},
     {"zzyw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 2, 1, 3)},
     {"zzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(2, 2, 2)},
     {"zzzx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 2, 2, 0)},
     {"zzzy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 2, 2, 1)},
     {"zzzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 2, 2, 2)},
     {"zzzw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 2, 2, 3)},
     {"zzw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(2, 2, 3)},
     {"zzwx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 2, 3, 0)},
     {"zzwy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 2, 3, 1)},
     {"zzwz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 2, 3, 2)},
     {"zzww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 2, 3, 3)},
     {"zw", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE2(2, 3)},
     {"zwx", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(2, 3, 0)},
     {"zwxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 3, 0, 0)},
     {"zwxy", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(2, 3, 0, 1)},
     {"zwxz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 3, 0, 2)},
     {"zwxw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 3, 0, 3)},
     {"zwy", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(2, 3, 1)},
     {"zwyx", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(2, 3, 1, 0)},
     {"zwyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 3, 1, 1)},
     {"zwyz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 3, 1, 2)},
     {"zwyw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 3, 1, 3)},
     {"zwz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(2, 3, 2)},
     {"zwzx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 3, 2, 0)},
     {"zwzy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 3, 2, 1)},
     {"zwzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 3, 2, 2)},
     {"zwzw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 3, 2, 3)},
     {"zww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(2, 3, 3)},
     {"zwwx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 3, 3, 0)},
     {"zwwy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 3, 3, 1)},
     {"zwwz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 3, 3, 2)},
     {"zwww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(2, 3, 3, 3)},
     {"wx", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE2(3, 0)},
     {"wxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(3, 0, 0)},
     {"wxxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 0, 0, 0)},
     {"wxxy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 0, 0, 1)},
     {"wxxz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 0, 0, 2)},
     {"wxxw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 0, 0, 3)},
     {"wxy", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(3, 0, 1)},
     {"wxyx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 0, 1, 0)},
     {"wxyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 0, 1, 1)},
     {"wxyz", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(3, 0, 1, 2)},
     {"wxyw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 0, 1, 3)},
     {"wxz", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(3, 0, 2)},
     {"wxzx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 0, 2, 0)},
     {"wxzy", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(3, 0, 2, 1)},
     {"wxzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 0, 2, 2)},
     {"wxzw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 0, 2, 3)},
     {"wxw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(3, 0, 3)},
     {"wxwx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 0, 3, 0)},
     {"wxwy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 0, 3, 1)},
     {"wxwz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 0, 3, 2)},
     {"wxww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 0, 3, 3)},
     {"wy", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE2(3, 1)},
     {"wyx", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(3, 1, 0)},
     {"wyxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 1, 0, 0)},
     {"wyxy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 1, 0, 1)},
     {"wyxz", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(3, 1, 0, 2)},
     {"wyxw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 1, 0, 3)},
     {"wyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(3, 1, 1)},
     {"wyyx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 1, 1, 0)},
     {"wyyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 1, 1, 1)},
     {"wyyz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 1, 1, 2)},
     {"wyyw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 1, 1, 3)},
     {"wyz", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(3, 1, 2)},
     {"wyzx", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(3, 1, 2, 0)},
     {"wyzy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 1, 2, 1)},
     {"wyzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 1, 2, 2)},
     {"wyzw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 1, 2, 3)},
     {"wyw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(3, 1, 3)},
     {"wywx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 1, 3, 0)},
     {"wywy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 1, 3, 1)},
     {"wywz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 1, 3, 2)},
     {"wyww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 1, 3, 3)},
     {"wz", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE2(3, 2)},
     {"wzx", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(3, 2, 0)},
     {"wzxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 2, 0, 0)},
     {"wzxy", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(3, 2, 0, 1)},
     {"wzxz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 2, 0, 2)},
     {"wzxw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 2, 0, 3)},
     {"wzy", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE3(3, 2, 1)},
     {"wzyx", (getter)Vector_swizzle_get, (setter)Vector_swizzle_set, NULL, SWIZZLE4(3, 2, 1, 0)},
     {"wzyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 2, 1, 1)},
     {"wzyz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 2, 1, 2)},
     {"wzyw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 2, 1, 3)},
     {"wzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(3, 2, 2)},
     {"wzzx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 2, 2, 0)},
     {"wzzy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 2, 2, 1)},
     {"wzzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 2, 2, 2)},
     {"wzzw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 2, 2, 3)},
     {"wzw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(3, 2, 3)},
     {"wzwx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 2, 3, 0)},
     {"wzwy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 2, 3, 1)},
     {"wzwz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 2, 3, 2)},
     {"wzww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 2, 3, 3)},
     {"ww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE2(3, 3)},
     {"wwx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(3, 3, 0)},
     {"wwxx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 3, 0, 0)},
     {"wwxy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 3, 0, 1)},
     {"wwxz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 3, 0, 2)},
     {"wwxw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 3, 0, 3)},
     {"wwy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(3, 3, 1)},
     {"wwyx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 3, 1, 0)},
     {"wwyy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 3, 1, 1)},
     {"wwyz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 3, 1, 2)},
     {"wwyw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 3, 1, 3)},
     {"wwz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(3, 3, 2)},
     {"wwzx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 3, 2, 0)},
     {"wwzy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 3, 2, 1)},
     {"wwzz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 3, 2, 2)},
     {"wwzw", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 3, 2, 3)},
     {"www", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE3(3, 3, 3)},
     {"wwwx", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 3, 3, 0)},
     {"wwwy", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 3, 3, 1)},
     {"wwwz", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 3, 3, 2)},
     {"wwww", (getter)Vector_swizzle_get, (setter)NULL, NULL, SWIZZLE4(3, 3, 3, 3)},
 
 #undef AXIS_FROM_CHAR
 #undef SWIZZLE1
 #undef SWIZZLE2
 #undef SWIZZLE3
 #undef SWIZZLE4
 #undef _SWIZZLE1
 #undef _SWIZZLE2
 #undef _SWIZZLE3
 #undef _SWIZZLE4
 
     {NULL, NULL, NULL, NULL, NULL} /* Sentinel */
 };
 
 /**
  * Row vector multiplication - (Vector * Matrix)
  * <pre>
  * [x][y][z] * [1][4][7]
  *             [2][5][8]
  *             [3][6][9]
  * </pre>
  * \note vector/matrix multiplication is not commutative.
  */
 static int row_vector_multiplication(float r_vec[MAX_DIMENSIONS],
                                      VectorObject *vec,
                                      MatrixObject *mat)
 {
   float vec_cpy[MAX_DIMENSIONS];
   int row, col, z = 0, vec_size = vec->size;
 
   if (mat->num_row != vec_size) {
     if (mat->num_row == 4 && vec_size == 3) {
       vec_cpy[3] = 1.0f;
     }
     else {
       PyErr_SetString(PyExc_ValueError,
                       "vector * matrix: matrix column size "
                       "and the vector size must be the same");
       return -1;
     }
   }
 
   if (BaseMath_ReadCallback(vec) == -1 || BaseMath_ReadCallback(mat) == -1) {
     return -1;
   }
 
   memcpy(vec_cpy, vec->vec, vec_size * sizeof(float));
 
   r_vec[3] = 1.0f;
   /* muliplication */
   for (col = 0; col < mat->num_col; col++) {
     double dot = 0.0;
     for (row = 0; row < mat->num_row; row++) {
       dot += (double)(MATRIX_ITEM(mat, row, col) * vec_cpy[row]);
     }
     r_vec[z++] = (float)dot;
   }
   return 0;
 }
 
 /*----------------------------Vector.negate() -------------------- */
 PyDoc_STRVAR(Vector_negate_doc,
              ".. method:: negate()\n"
              "\n"
              "   Set all values to their negative.\n");
 static PyObject *Vector_negate(VectorObject *self)
 {
   if (BaseMath_ReadCallback(self) == -1) {
     return NULL;
   }
 
   negate_vn(self->vec, self->size);
 
   (void)BaseMath_WriteCallback(self); /* already checked for error */
   Py_RETURN_NONE;
 }
 
 static struct PyMethodDef Vector_methods[] = {
     /* Class Methods */
     {"Fill", (PyCFunction)C_Vector_Fill, METH_VARARGS | METH_CLASS, C_Vector_Fill_doc},
     {"Range", (PyCFunction)C_Vector_Range, METH_VARARGS | METH_CLASS, C_Vector_Range_doc},
     {"Linspace", (PyCFunction)C_Vector_Linspace, METH_VARARGS | METH_CLASS, C_Vector_Linspace_doc},
     {"Repeat", (PyCFunction)C_Vector_Repeat, METH_VARARGS | METH_CLASS, C_Vector_Repeat_doc},
 
     /* in place only */
     {"zero", (PyCFunction)Vector_zero, METH_NOARGS, Vector_zero_doc},
     {"negate", (PyCFunction)Vector_negate, METH_NOARGS, Vector_negate_doc},
 
     /* operate on original or copy */
     {"normalize", (PyCFunction)Vector_normalize, METH_NOARGS, Vector_normalize_doc},
     {"normalized", (PyCFunction)Vector_normalized, METH_NOARGS, Vector_normalized_doc},
 
     {"resize", (PyCFunction)Vector_resize, METH_O, Vector_resize_doc},
     {"resized", (PyCFunction)Vector_resized, METH_O, Vector_resized_doc},
     {"to_2d", (PyCFunction)Vector_to_2d, METH_NOARGS, Vector_to_2d_doc},
     {"resize_2d", (PyCFunction)Vector_resize_2d, METH_NOARGS, Vector_resize_2d_doc},
     {"to_3d", (PyCFunction)Vector_to_3d, METH_NOARGS, Vector_to_3d_doc},
     {"resize_3d", (PyCFunction)Vector_resize_3d, METH_NOARGS, Vector_resize_3d_doc},
     {"to_4d", (PyCFunction)Vector_to_4d, METH_NOARGS, Vector_to_4d_doc},
     {"resize_4d", (PyCFunction)Vector_resize_4d, METH_NOARGS, Vector_resize_4d_doc},
     {"to_tuple", (PyCFunction)Vector_to_tuple, METH_VARARGS, Vector_to_tuple_doc},
     {"to_track_quat", (PyCFunction)Vector_to_track_quat, METH_VARARGS, Vector_to_track_quat_doc},
     {"orthogonal", (PyCFunction)Vector_orthogonal, METH_NOARGS, Vector_orthogonal_doc},
 
     /* operation between 2 or more types  */
     {"reflect", (PyCFunction)Vector_reflect, METH_O, Vector_reflect_doc},
     {"cross", (PyCFunction)Vector_cross, METH_O, Vector_cross_doc},
     {"dot", (PyCFunction)Vector_dot, METH_O, Vector_dot_doc},
     {"angle", (PyCFunction)Vector_angle, METH_VARARGS, Vector_angle_doc},
     {"angle_signed", (PyCFunction)Vector_angle_signed, METH_VARARGS, Vector_angle_signed_doc},
     {"rotation_difference",
      (PyCFunction)Vector_rotation_difference,
      METH_O,
      Vector_rotation_difference_doc},
     {"project", (PyCFunction)Vector_project, METH_O, Vector_project_doc},
     {"lerp", (PyCFunction)Vector_lerp, METH_VARARGS, Vector_lerp_doc},
     {"slerp", (PyCFunction)Vector_slerp, METH_VARARGS, Vector_slerp_doc},
     {"rotate", (PyCFunction)Vector_rotate, METH_O, Vector_rotate_doc},
 
     /* base-math methods */
     {"freeze", (PyCFunction)BaseMathObject_freeze, METH_NOARGS, BaseMathObject_freeze_doc},
 
     {"copy", (PyCFunction)Vector_copy, METH_NOARGS, Vector_copy_doc},
     {"__copy__", (PyCFunction)Vector_copy, METH_NOARGS, NULL},
     {"__deepcopy__", (PyCFunction)Vector_deepcopy, METH_VARARGS, NULL},
     {NULL, NULL, 0, NULL},
 };
 
 /**
  * Note:
  * #Py_TPFLAGS_CHECKTYPES allows us to avoid casting all types to Vector when coercing
  * but this means for eg that (vec * mat) and (mat * vec)
  * both get sent to Vector_mul and it needs to sort out the order
  */
 
 PyDoc_STRVAR(vector_doc,
              ".. class:: Vector(seq)\n"
              "\n"
              "   This object gives access to Vectors in Blender.\n"
              "\n"
              "   :param seq: Components of the vector, must be a sequence of at least two\n"
              "   :type seq: sequence of numbers\n");
 PyTypeObject vector_Type = {
     PyVarObject_HEAD_INIT(NULL, 0)
     /*  For printing, in format "<module>.<name>" */
     "Vector",             /* char *tp_name; */
     sizeof(VectorObject), /* int tp_basicsize; */
     0,                    /* tp_itemsize;  For allocation */
 
     /* Methods to implement standard operations */
 
     (destructor)BaseMathObject_dealloc, /* destructor tp_dealloc; */
     (printfunc)NULL,                    /* printfunc tp_print; */
     NULL,                               /* getattrfunc tp_getattr; */
     NULL,                               /* setattrfunc tp_setattr; */
     NULL,                               /* cmpfunc tp_compare; */
     (reprfunc)Vector_repr,              /* reprfunc tp_repr; */
 
     /* Method suites for standard classes */
 
     &Vector_NumMethods, /* PyNumberMethods *tp_as_number; */
     &Vector_SeqMethods, /* PySequenceMethods *tp_as_sequence; */
     &Vector_AsMapping,  /* PyMappingMethods *tp_as_mapping; */
 
     /* More standard operations (here for binary compatibility) */
 
     (hashfunc)Vector_hash, /* hashfunc tp_hash; */
     NULL,                  /* ternaryfunc tp_call; */
 #ifndef MATH_STANDALONE
     (reprfunc)Vector_str, /* reprfunc tp_str; */
 #else
     NULL, /* reprfunc tp_str; */
 #endif
     NULL, /* getattrofunc tp_getattro; */
     NULL, /* setattrofunc tp_setattro; */
 
     /* Functions to access object as input/output buffer */
     NULL, /* PyBufferProcs *tp_as_buffer; */
 
     /*** Flags to define presence of optional/expanded features ***/
     Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC,
     vector_doc, /*  char *tp_doc;  Documentation string */
     /*** Assigned meaning in release 2.0 ***/
 
     /* call function for all accessible objects */
     (traverseproc)BaseMathObject_traverse, /* tp_traverse */
 
     /* delete references to contained objects */
     (inquiry)BaseMathObject_clear, /* tp_clear */
 
     /***  Assigned meaning in release 2.1 ***/
     /*** rich comparisons ***/
     (richcmpfunc)Vector_richcmpr, /* richcmpfunc tp_richcompare; */
 
     /***  weak reference enabler ***/
     0, /* long tp_weaklistoffset; */
 
     /*** Added in release 2.2 ***/
     /*   Iterators */
     NULL, /* getiterfunc tp_iter; */
     NULL, /* iternextfunc tp_iternext; */
 
     /*** Attribute descriptor and subclassing stuff ***/
     Vector_methods,   /* struct PyMethodDef *tp_methods; */
     NULL,             /* struct PyMemberDef *tp_members; */
     Vector_getseters, /* struct PyGetSetDef *tp_getset; */
     NULL,             /* struct _typeobject *tp_base; */
     NULL,             /* PyObject *tp_dict; */
     NULL,             /* descrgetfunc tp_descr_get; */
     NULL,             /* descrsetfunc tp_descr_set; */
     0,                /* long tp_dictoffset; */
     NULL,             /* initproc tp_init; */
     NULL,             /* allocfunc tp_alloc; */
     Vector_new,       /* newfunc tp_new; */
     /*  Low-level free-memory routine */
     NULL, /* freefunc tp_free;  */
     /* For PyObject_IS_GC */
     NULL, /* inquiry tp_is_gc;  */
     NULL, /* PyObject *tp_bases; */
     /* method resolution order */
     NULL, /* PyObject *tp_mro;  */
     NULL, /* PyObject *tp_cache; */
     NULL, /* PyObject *tp_subclasses; */
     NULL, /* PyObject *tp_weaklist; */
     NULL,
 };
 
 PyObject *Vector_CreatePyObject(const float *vec, const int size, PyTypeObject *base_type)
 {
   VectorObject *self;
   float *vec_alloc;
 
   if (size < 2) {
     PyErr_SetString(PyExc_RuntimeError, "Vector(): invalid size");
     return NULL;
   }
 
   vec_alloc = PyMem_Malloc(size * sizeof(float));
   if (UNLIKELY(vec_alloc == NULL)) {
     PyErr_SetString(PyExc_MemoryError,
                     "Vector(): "
                     "problem allocating data");
     return NULL;
   }
 
   self = BASE_MATH_NEW(VectorObject, vector_Type, base_type);
   if (self) {
     self->vec = vec_alloc;
     self->size = size;
 
     /* init callbacks as NULL */
     self->cb_user = NULL;
     self->cb_type = self->cb_subtype = 0;
 
     if (vec) {
       memcpy(self->vec, vec, size * sizeof(float));
     }
     else { /* new empty */
       copy_vn_fl(self->vec, size, 0.0f);
       if (size == 4) { /* do the homogeneous thing */
         self->vec[3] = 1.0f;
       }
     }
     self->flag = BASE_MATH_FLAG_DEFAULT;
   }
   else {
     PyMem_Free(vec_alloc);
   }
 
   return (PyObject *)self;
 }
 
 /**
  * Create a vector that wraps existing memory.
  *
  * \param vec: Use this vector in-place.
  */
 PyObject *Vector_CreatePyObject_wrap(float *vec, const int size, PyTypeObject *base_type)
 {
   VectorObject *self;
 
   if (size < 2) {
     PyErr_SetString(PyExc_RuntimeError, "Vector(): invalid size");
     return NULL;
   }
 
   self = BASE_MATH_NEW(VectorObject, vector_Type, base_type);
   if (self) {
     self->size = size;
 
     /* init callbacks as NULL */
     self->cb_user = NULL;
     self->cb_type = self->cb_subtype = 0;
 
     self->vec = vec;
     self->flag = BASE_MATH_FLAG_DEFAULT | BASE_MATH_FLAG_IS_WRAP;
   }
   return (PyObject *)self;
 }
 
 /**
  * Create a vector where the value is defined by registered callbacks,
  * see: #Mathutils_RegisterCallback
  */
 PyObject *Vector_CreatePyObject_cb(PyObject *cb_user, int size, uchar cb_type, uchar cb_subtype)
 {
   VectorObject *self = (VectorObject *)Vector_CreatePyObject(NULL, size, NULL);
   if (self) {
     Py_INCREF(cb_user);
     self->cb_user = cb_user;
     self->cb_type = cb_type;
     self->cb_subtype = cb_subtype;
     PyObject_GC_Track(self);
   }
 
   return (PyObject *)self;
 }
 
 /**
  * \param vec: Initialized vector value to use in-place, allocated with #PyMem_Malloc
  */
 PyObject *Vector_CreatePyObject_alloc(float *vec, const int size, PyTypeObject *base_type)
 {
   VectorObject *self;
   self = (VectorObject *)Vector_CreatePyObject_wrap(vec, size, base_type);
   if (self) {
     self->flag &= ~BASE_MATH_FLAG_IS_WRAP;
   }
 
   return (PyObject *)self;
 }