Bendy Bones: Advanced B-Bones for Easier + Simple Rigging

This commit/patch/branch brings a bunch of powerful new options for B-Bones and
for working with B-Bones, making it easier for animators to create their own
rigs, using fewer bones (which also means hopefully lighter + faster rigs ;)
This functionality was first demoed by Daniel at BConf15

Some highlights from this patch include:
* You can now directly control the shape of B-Bones using a series of properties
  instead of being restricted to trying to indirectly control them through the
  neighbouring bones.  See the "Bendy Bones" panel...

* B-Bones can be shaped in EditMode to define a "curved rest pose" for the bone.
  This is useful for things like eyebrows and mouths/eyelids

* You can now make B-Bones use custom bones as their reference bone handles,
  instead of only using the parent/child bones. To do so, enable the
  "Use Custom Reference Handles" toggle. If none are specified, then the BBone will
  only use the Bendy Bone properties.

* Constraints Head/Tail option can now slide along the B-Bone shape, instead of
  just linearly interpolating between the endpoints of the bone.

For more details, see:
* http://aligorith.blogspot.co.nz/2016/05/bendy-bones-dev-update.html
* http://aligorith.blogspot.co.nz/2016/05/an-in-depth-look-at-how-b-bones-work.html



-- Credits --
Original Idea: Daniel M Lara (pepeland)
Original Patch/Research: Jose Molina
Additional Development + Polish: Joshua Leung (aligorith)
Testing/Feedback: Daniel M Lara (pepeland), Juan Pablo Bouza (jpbouza)

1 files changed, 32 insertions, 0 deletions

diff --git a/release/scripts/startup/keyingsets_builtins.py b/release/scripts/startup/keyingsets_builtins.py
index 6d52a81456b..195eaf823f4 100644
--- a/release/scripts/startup/keyingsets_builtins.py
+++ b/release/scripts/startup/keyingsets_builtins.py
@@ -175,6 +175,22 @@ class BUILTIN_KSI_RotScale(KeyingSetInfo):
 
 # ------------
 
+# Bendy Bones
+class BUILTIN_KSI_BendyBones(KeyingSetInfo):
+    """Insert a keyframe for each of the BBone shape properties"""
+    bl_label = "BBone Shape"
+
+    # poll - use callback for selected bones
+    poll = keyingsets_utils.RKS_POLL_selected_bones
+
+    # iterator - use callback for selected bones
+    iterator = keyingsets_utils.RKS_ITER_selected_bones
+
+    # generator - use generator for bendy bone properties
+    generate = keyingsets_utils.RKS_GEN_bendy_bones
+
+# ------------
+
 
 # VisualLocation
 class BUILTIN_KSI_VisualLoc(KeyingSetInfo):
@@ -387,6 +403,9 @@ class BUILTIN_KSI_WholeCharacter(KeyingSetInfo):
             ksi.doRot3d(ks, bone)
         ksi.doScale(ks, bone)
 
+        # bbone properties?
+        ksi.doBBone(context, ks, bone)
+
         # custom props?
         ksi.doCustomProps(ks, bone)
 
@@ -466,6 +485,19 @@ class BUILTIN_KSI_WholeCharacter(KeyingSetInfo):
 
     # ----------------
 
+    # bendy bone properties
+    def doBBone(ksi, context, ks, pchan):
+        bone = pchan.bone
+        
+        # This check is crude, but is the best we can do for now
+        # It simply adds all of these if the bbone has segments
+        # (and the bone is a control bone). This may lead to some
+        # false positives...
+        if bone.bbone_segments > 1:
+            keyingsets_utils.RKS_GEN_bendy_bones(ksi, context, ks, pchan)
+
+    # ----------------
+
     # custom properties
     def doCustomProps(ksi, ks, bone):