Armature CrazySpace Improvement

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

An improved CrazySpace correction is now used for Armature modifiers that use
vertex groups, and that are the first enabled modifiers in the stack. This is
a a specific case, but also a common one.

http://www.blender.org/development/current-projects/changes-since-244/skinning/

Implementation Notes:

- The quaternion crazyspace correction is still used for modifiers other than
  the armature modifier.
- Modifiers can now provide a deform matrix per vertex to be used for
  crazyspace correction, only the armature modifier implements this now.

1 files changed, 5 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_DerivedMesh.h b/source/blender/blenkernel/BKE_DerivedMesh.h
index 872717fdb9b..4a19bfb9249 100644
--- a/source/blender/blenkernel/BKE_DerivedMesh.h
+++ b/source/blender/blenkernel/BKE_DerivedMesh.h
@@ -425,6 +425,11 @@ DerivedMesh *editmesh_get_derived_cage(CustomDataMask dataMask);
 DerivedMesh *editmesh_get_derived_cage_and_final(DerivedMesh **final_r,
                                                  CustomDataMask dataMask);
 
+/* returns an array of deform matrices for crazyspace correction, and the
+   number of modifiers left */
+int editmesh_get_first_deform_matrices(float (**deformmats)[3][3],
+                                       float (**deformcos)[3]);
+
 void weight_to_rgb(float input, float *fr, float *fg, float *fb);
 
 /* determines required DerivedMesh data according to view and edit modes */