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mathutils: support Vector.rotate for 2D vectors

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This commit is contained in:
Tiago Chaves
2020-02-20 13:57:32 +11:00
committed by Campbell Barton
parent 0115568ca6
commit bc86eb1780
3 changed files with 45 additions and 16 deletions
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17
source/blender/python/mathutils/mathutils_Matrix.c
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@@ -3306,6 +3306,23 @@ int Matrix_ParseAny(PyObject *o, void *p)
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;

1
source/blender/python/mathutils/mathutils_Matrix.h
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@@ -76,6 +76,7 @@ PyObject *Matrix_CreatePyObject_cb(PyObject *user,
/* PyArg_ParseTuple's "O&" formatting helpers. */
int Matrix_ParseAny(PyObject *o, void *p);
int Matrix_Parse2x2(PyObject *o, void *p);
int Matrix_Parse3x3(PyObject *o, void *p);
int Matrix_Parse4x4(PyObject *o, void *p);

43
source/blender/python/mathutils/mathutils_Vector.c
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@@ -1273,32 +1273,43 @@ static PyObject *Vector_slerp(VectorObject *self, PyObject *args)
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"
" :arg other: rotation component of mathutils value\n"
" :type other: :class:`Euler`, :class:`Quaternion` or :class:`Matrix`\n");
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)
{
float other_rmat[3][3];
if (BaseMath_ReadCallback_ForWrite(self) == -1) {
return NULL;
}
if (mathutils_any_to_rotmat(other_rmat, value, "Vector.rotate(value)") == -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 (self->size < 3 || self->size > 4) {
PyErr_SetString(PyExc_ValueError, "Vector must be 3D or 4D");
return NULL;
if (mathutils_any_to_rotmat(other_rmat, value, "Vector.rotate(value)") == -1) {
return NULL;
}
mul_m3_v3(other_rmat, self->vec);
}
mul_m3_v3(other_rmat, self->vec);
(void)BaseMath_WriteCallback(self);
Py_RETURN_NONE;
}