Modifiers: Add option to directly specify a 2D transform for UVWarp

Currently the only option is to warp based on the transform of other
objects, which is inconvenient if you want to e.g. control it through
a driver - you need to set up a dummy object and go through that,
which is clunky and should be unneccessary.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D6690

1 files changed, 3 insertions, 0 deletions

diff --git a/source/blender/blenlib/BLI_math_matrix.h b/source/blender/blenlib/BLI_math_matrix.h
index ac0f5f44c74..acefe18fd40 100644
--- a/source/blender/blenlib/BLI_math_matrix.h
+++ b/source/blender/blenlib/BLI_math_matrix.h
@@ -60,6 +60,9 @@ void copy_m4d_m4(double R[4][4], const float A[4][4]);
 void swap_m3m3(float A[3][3], float B[3][3]);
 void swap_m4m4(float A[4][4], float B[4][4]);
 
+/* Build index shuffle matrix */
+void shuffle_m4(float R[4][4], int index[4]);
+
 /******************************** Arithmetic *********************************/
 
 void add_m3_m3m3(float R[3][3], const float A[3][3], const float B[3][3]);