[Bf-blender-cvs] [347a4956a0f] master: Alembic: added some clarification

[Sybren A. Stüvel]

Commit: 347a4956a0f4c12f8bcaa789f0574bada3e4db63
Author: Sybren A. Stüvel
Date:   Wed Feb 15 15:26:33 2017 +0100
Branches: master
https://developer.blender.org/rB347a4956a0f4c12f8bcaa789f0574bada3e4db63

Alembic: added some clarification

===================================================================

M	source/blender/alembic/intern/abc_util.cc

===================================================================

diff --git a/source/blender/alembic/intern/abc_util.cc b/source/blender/alembic/intern/abc_util.cc
index aa95180dfe2..f51e15fd25a 100644
--- a/source/blender/alembic/intern/abc_util.cc
+++ b/source/blender/alembic/intern/abc_util.cc
@@ -163,7 +163,10 @@ static void create_rotation_matrix(
 }
 
 /* Recompute transform matrix of object in new coordinate system
- * (from Y-Up to Z-Up). */
+ * (from Y-Up to Z-Up).
+ *
+ * Note that r_mat is used as both input and output parameter.
+ */
 void create_transform_matrix(float r_mat[4][4])
 {
 	float rot_mat[3][3], rot[3][3], scale_mat[4][4], invmat[4][4], transform_mat[4][4];