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Py Mathutils: add invert_safe() and inverted_safe() to Matrix.

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Those two mimic our BLI invert_m4_m4_safe - they add a small offset to diagonal values,
in case org matrix is degenerated, and if still non-invertible, return identity matrix.

Org patch by me, final enhanced version by ideasman42, many thanks!
This commit is contained in:
Bastien Montagne
2014-09-06 14:54:08 +02:00
parent f670a8aeaa
commit e44c49d89d
3 changed files with 204 additions and 61 deletions
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source/blender/python/mathutils/mathutils_Matrix.h
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@@ -41,6 +41,7 @@ extern PyTypeObject matrix_access_Type;
# define MATRIX_ITEM_ASSERT(_mat, _row, _col) (void)0
#endif
#define MATRIX_ITEM_INDEX_NUMROW(_totrow, _row, _col) ((_totrow * (_col)) + (_row))
#define MATRIX_ITEM_INDEX(_mat, _row, _col) (MATRIX_ITEM_ASSERT(_mat, _row, _col),(((_mat)->num_row * (_col)) + (_row)))
#define MATRIX_ITEM_PTR( _mat, _row, _col) ((_mat)->matrix + MATRIX_ITEM_INDEX(_mat, _row, _col))
#define MATRIX_ITEM( _mat, _row, _col) ((_mat)->matrix [MATRIX_ITEM_INDEX(_mat, _row, _col)])