forked from bartvdbraak/blender
patch [#28032] swapped matrix multiplication order, reverse it back, tested with FBX, BVH import/export which are very sensitive to changes in matrix rotation.
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@ -1587,7 +1587,7 @@ static PyObject *Matrix_mul(PyObject *m1, PyObject *m2)
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if(mat1 && mat2) {
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/*MATRIX * MATRIX*/
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if(mat1->row_size != mat2->col_size){
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if(mat2->row_size != mat1->col_size){
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PyErr_SetString(PyExc_ValueError,
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"Matrix multiplication: "
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"matrix A rowsize must equal matrix B colsize");
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@ -1597,15 +1597,15 @@ static PyObject *Matrix_mul(PyObject *m1, PyObject *m2)
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float mat[16]= {0.0f};
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int x, y, z;
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for(x = 0; x < mat1->row_size; x++) {
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for(y = 0; y < mat2->col_size; y++) {
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for(z = 0; z < mat2->row_size; z++) {
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mat[x * mat1->col_size + y] += (mat1->matrix[x][z] * mat2->matrix[z][y]);
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for(x = 0; x < mat2->row_size; x++) {
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for(y = 0; y < mat1->col_size; y++) {
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for(z = 0; z < mat1->row_size; z++) {
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mat[x * mat2->col_size + y] += (mat2->matrix[x][z] * mat1->matrix[z][y]);
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}
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}
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}
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return newMatrixObject(mat, mat2->row_size, mat1->col_size, Py_NEW, Py_TYPE(mat1));
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return newMatrixObject(mat, mat1->row_size, mat2->col_size, Py_NEW, Py_TYPE(mat1));
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}
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}
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else if(mat2) {
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