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, 6 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_modifier.h b/source/blender/blenkernel/BKE_modifier.h
index ce3f33bd35c..297443b883d 100644
--- a/source/blender/blenkernel/BKE_modifier.h
+++ b/source/blender/blenkernel/BKE_modifier.h
@@ -125,6 +125,11 @@ typedef struct ModifierTypeInfo {
 	            struct EditMesh *editData, struct DerivedMesh *derivedData,
 	            float (*vertexCos)[3], int numVerts);
 
+	/* Set deform matrix per vertex for crazyspace correction */
+	void (*deformMatricesEM)(
+	            struct ModifierData *md, struct Object *ob,
+	            struct EditMesh *editData, struct DerivedMesh *derivedData,
+	            float (*vertexCos)[3], float (*defMats)[3][3], int numVerts);
 
 	/********************* Non-deform modifier functions *********************/
 
@@ -257,6 +262,7 @@ void          modifier_copyData(struct ModifierData *md, struct ModifierData *ta
 int           modifier_dependsOnTime(struct ModifierData *md);
 int           modifier_supportsMapping(struct ModifierData *md);
 int           modifier_couldBeCage(struct ModifierData *md);
+int           modifier_isDeformer(struct ModifierData *md);
 void          modifier_setError(struct ModifierData *md, char *format, ...);
 
 void          modifiers_foreachObjectLink(struct Object *ob,