Rigify:

- Added two driven-shape-key rig types that create and drive shape keys on a mesh/meshes based on the distance or rotation difference between two bones.
- Fixed bug in finger curl rig type where secondary finger controls were not created.  Finger type can also now (optionally) have a hinge switch (useful when using it for wings).
- Changed the blending system in rigify_utils to use copy_transforms constraints instead of copy_loc+copy_rot.
- Finished the quadruped leg type.  Now has both ik and fk control and ik/fk switching.  Also uses a rotating bone to control the knee direction instead of a pole target (seems to work more consistently for quadruped setups).  There's still one annoying bug regarding foot roll, but it's not blocking.  I'll track it down later.
- Mouth rig now creates corrective shape keys on the face mesh for dealing with mouth corners when they spread open.
- Biped arm and leg types now cause mesh to scale when you scale the fk controls.
- Misc improvements to the rig types.

release/scripts/modules/rigify_utils.py

@@ -145,28 +145,12 @@ def blend_bone_list(obj, apply_bones, from_bones, to_bones, target_bone=None, ta
         var.targets[0].id = obj
         var.targets[0].data_path = driver_path
 
-    def blend_location(new_pbone, from_bone_name, to_bone_name):
-        con = new_pbone.constraints.new('COPY_LOCATION')
+    def blend_transforms(new_pbone, from_bone_name, to_bone_name):
+        con = new_pbone.constraints.new('COPY_TRANSFORMS')
         con.target = obj
         con.subtarget = from_bone_name
 
-        con = new_pbone.constraints.new('COPY_LOCATION')
-        con.target = obj
-        con.subtarget = to_bone_name
-
-        fcurve = con.driver_add("influence", 0)
-        driver = fcurve.driver
-        driver.type = 'AVERAGE'
-        fcurve.modifiers.remove(0) # grr dont need a modifier
-
-        blend_target(driver)
-
-    def blend_rotation(new_pbone, from_bone_name, to_bone_name):
-        con = new_pbone.constraints.new('COPY_ROTATION')
-        con.target = obj
-        con.subtarget = from_bone_name
-
-        con = new_pbone.constraints.new('COPY_ROTATION')
+        con = new_pbone.constraints.new('COPY_TRANSFORMS')
         con.target = obj
         con.subtarget = to_bone_name
 
@@ -187,12 +171,8 @@ def blend_bone_list(obj, apply_bones, from_bones, to_bones, target_bone=None, ta
 
         new_pbone = obj.pose.bones[new_bone_name]
 
-        # if the bone is connected or its location is totally locked then dont add location blending.
-        if not (new_pbone.bone.connected or (False not in new_pbone.lock_location)):
-            blend_location(new_pbone, from_bone_name, to_bone_name)
+        blend_transforms(new_pbone, from_bone_name, to_bone_name)
 
-        if not (False not in new_pbone.lock_rotation): # TODO. 4D chech?
-            blend_rotation(new_pbone, from_bone_name, to_bone_name)
 
 
 def add_pole_target_bone(obj, base_bone_name, name, mode='CROSS'):