- blend_m3_m3m3 and blend_m4_m4m4 now support matrices with negative scales.

- python/mathutils api matrix.lerp(other, factor)
- new function mat3_to_rot_size(), like mat4_to_loc_rot_size but with no location.

1 files changed, 4 insertions, 2 deletions

diff --git a/source/blender/blenlib/BLI_math_matrix.h b/source/blender/blenlib/BLI_math_matrix.h
index 2144107a6cd..7b21c5f6df7 100644
--- a/source/blender/blenlib/BLI_math_matrix.h
+++ b/source/blender/blenlib/BLI_math_matrix.h
@@ -144,6 +144,8 @@ void mat4_to_size(float r[3], float M[4][4]);
 void translate_m4(float mat[4][4], float tx, float ty, float tz);
 void rotate_m4(float mat[4][4], const char axis, const float angle);
 
+
+void mat3_to_rot_size(float rot[3][3], float size[3], float mat3[][3]);
 void mat4_to_loc_rot_size(float loc[3], float rot[3][3], float size[3], float wmat[][4]);
 
 void loc_eul_size_to_mat4(float R[4][4],
@@ -155,8 +157,8 @@ void loc_quat_size_to_mat4(float R[4][4],
 void loc_axisangle_size_to_mat4(float R[4][4],
 	const float loc[3], const float axis[4], const float angle, const float size[3]);
 
-void blend_m3_m3m3(float R[3][3], float A[3][3], float B[3][3], float t);
-void blend_m4_m4m4(float R[4][4], float A[4][4], float B[4][4], float t);
+void blend_m3_m3m3(float R[3][3], float A[3][3], float B[3][3], const float t);
+void blend_m4_m4m4(float R[4][4], float A[4][4], float B[4][4], const float t);
 
 int is_negative_m3(float mat[3][3]);
 int is_negative_m4(float mat[4][4]);