diff options
Diffstat (limited to 'source/blender/blenlib/intern/math_matrix.c')
| -rw-r--r-- | source/blender/blenlib/intern/math_matrix.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/source/blender/blenlib/intern/math_matrix.c b/source/blender/blenlib/intern/math_matrix.c index b460d75d77f..2ada05d2965 100644 --- a/source/blender/blenlib/intern/math_matrix.c +++ b/source/blender/blenlib/intern/math_matrix.c @@ -2140,6 +2140,16 @@ void mat3_to_rot_size(float rot[3][3], float size[3], const float mat3[3][3]) } } +void mat4_to_rot(float rot[3][3], const float wmat[4][4]) +{ + normalize_v3_v3(rot[0], wmat[0]); + normalize_v3_v3(rot[1], wmat[1]); + normalize_v3_v3(rot[2], wmat[2]); + if (UNLIKELY(is_negative_m3(rot))) { + negate_m3(rot); + } +} + void mat4_to_loc_rot_size(float loc[3], float rot[3][3], float size[3], const float wmat[4][4]) { float mat3[3][3]; /* wmat -> 3x3 */ |