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py api: add mathutils.Matrix adjugate(d) methods, also add adjoint_m2_m2() to BLI_math_matrix

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Campbell Barton
2012-10-29 03:36:55 +00:00
parent 5549904171
commit dbb40e805d
3 changed files with 106 additions and 12 deletions
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1
source/blender/blenlib/BLI_math_matrix.h
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@@ -128,6 +128,7 @@ int is_orthonormal_m4(float mat[4][4]);
int is_uniform_scaled_m3(float mat[3][3]);
void adjoint_m2_m2(float R[2][2], float A[2][2]);
void adjoint_m3_m3(float R[3][3], float A[3][3]);
void adjoint_m4_m4(float R[4][4], float A[4][4]);

10
source/blender/blenlib/intern/math_matrix.c
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@@ -945,8 +945,18 @@ void normalize_m4_m4(float rmat[][4], float mat[][4])
if (len != 0.0f) rmat[2][3] = mat[2][3] / len;
}
void adjoint_m2_m2(float m1[][2], float m[][2])
{
BLI_assert(m1 != m);
m1[0][0] = m[1][1];
m1[0][1] = -m[1][0];
m1[1][0] = -m[0][1];
m1[1][1] = m[0][0];
}
void adjoint_m3_m3(float m1[][3], float m[][3])
{
BLI_assert(m1 != m);
m1[0][0] = m[1][1] * m[2][2] - m[1][2] * m[2][1];
m1[0][1] = -m[0][1] * m[2][2] + m[0][2] * m[2][1];
m1[0][2] = m[0][1] * m[1][2] - m[0][2] * m[1][1];

107
source/blender/python/mathutils/mathutils_Matrix.c
View File

@@ -1196,17 +1196,27 @@ static PyObject *Matrix_invert(MatrixObject *self)
if (det != 0) {
/* calculate the classical adjoint */
if (self->num_col == 2) {
mat[0] = MATRIX_ITEM(self, 1, 1);
mat[1] = -MATRIX_ITEM(self, 0, 1);
mat[2] = -MATRIX_ITEM(self, 1, 0);
mat[3] = MATRIX_ITEM(self, 0, 0);
}
else if (self->num_col == 3) {
adjoint_m3_m3((float (*)[3])mat, (float (*)[3])self->matrix);
}
else if (self->num_col == 4) {
adjoint_m4_m4((float (*)[4])mat, (float (*)[4])self->matrix);
switch (self->num_col) {
case 2:
{
adjoint_m2_m2((float (*)[2])mat, (float (*)[2])self->matrix);
break;
}
case 3:
{
adjoint_m3_m3((float (*)[3])mat, (float (*)[3])self->matrix);
break;
}
case 4:
{
adjoint_m4_m4((float (*)[4])mat, (float (*)[4])self->matrix);
break;
}
default:
PyErr_Format(PyExc_TypeError,
"Matrix invert(ed): size (%d) unsupported",
(int)self->num_col);
return NULL;
}
/* divide by determinate */
for (x = 0; x < (self->num_col * self->num_row); x++) {
@@ -1236,7 +1246,7 @@ PyDoc_STRVAR(Matrix_inverted_doc,
"\n"
" Return an inverted copy of the matrix.\n"
"\n"
" :return: the inverted matrix.\n"
" :return: the inverted matrix.\n"
" :rtype: :class:`Matrix`\n"
"\n"
" .. note:: When the matrix cant be inverted a :exc:`ValueError` exception is raised.\n"
@@ -1246,6 +1256,77 @@ static PyObject *Matrix_inverted(MatrixObject *self)
return matrix__apply_to_copy((PyNoArgsFunction)Matrix_invert, self);
}
/*---------------------------matrix.adjugate() ---------------------*/
PyDoc_STRVAR(Matrix_adjugate_doc,
".. method:: adjugate()\n"
"\n"
" Set the matrix to its adjugate.\n"
"\n"
" .. note:: When the matrix cant be adjugated a :exc:`ValueError` exception is raised.\n"
"\n"
" .. seealso:: <http://en.wikipedia.org/wiki/Adjugate_matrix>\n"
);
static PyObject *Matrix_adjugate(MatrixObject *self)
{
if (BaseMath_ReadCallback(self) == -1)
return NULL;
if (self->num_col != self->num_row) {
PyErr_SetString(PyExc_TypeError,
"Matrix.adjugate(d): "
"only square matrices are supported");
return NULL;
}
/* calculate the classical adjoint */
switch (self->num_col) {
case 2:
{
float mat[2][2];
adjoint_m2_m2(mat, (float (*)[2])self->matrix);
copy_v4_v4((float *)self->matrix, (float *)mat);
break;
}
case 3:
{
float mat[3][3];
adjoint_m3_m3(mat, (float (*)[3])self->matrix);
copy_m3_m3((float (*)[3])self->matrix, mat);
break;
}
case 4:
{
float mat[4][4];
adjoint_m4_m4(mat, (float (*)[4])self->matrix);
copy_m4_m4((float (*)[4])self->matrix, mat);
break;
}
default:
PyErr_Format(PyExc_TypeError,
"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);
}
PyDoc_STRVAR(Matrix_rotate_doc,
".. method:: rotate(other)\n"
"\n"
@@ -2281,6 +2362,8 @@ static struct PyMethodDef Matrix_methods[] = {
{"transposed", (PyCFunction) Matrix_transposed, METH_NOARGS, Matrix_transposed_doc},
{"invert", (PyCFunction) Matrix_invert, METH_NOARGS, Matrix_invert_doc},
{"inverted", (PyCFunction) Matrix_inverted, METH_NOARGS, Matrix_inverted_doc},
{"adjugate", (PyCFunction) Matrix_adjugate, METH_NOARGS, Matrix_adjugate_doc},
{"adjugated", (PyCFunction) Matrix_adjugated, METH_NOARGS, Matrix_adjugated_doc},
{"to_3x3", (PyCFunction) Matrix_to_3x3, METH_NOARGS, Matrix_to_3x3_doc},
/* TODO. {"resize_3x3", (PyCFunction) Matrix_resize3x3, METH_NOARGS, Matrix_resize3x3_doc}, */
{"to_4x4", (PyCFunction) Matrix_to_4x4, METH_NOARGS, Matrix_to_4x4_doc},