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, 11 insertions, 3 deletions

diff --git a/source/blender/makesdna/DNA_armature_types.h b/source/blender/makesdna/DNA_armature_types.h
index b995e6917a9..cda6441f0ae 100644
--- a/source/blender/makesdna/DNA_armature_types.h
+++ b/source/blender/makesdna/DNA_armature_types.h
@@ -68,11 +68,18 @@ typedef struct Bone {
 	float        xwidth, length, zwidth; /*  width: for block bones. keep in this order, transform! */
 	float        ease1, ease2;           /*  length of bezier handles */
 	float        rad_head, rad_tail;     /* radius for head/tail sphere, defining deform as well, parent->rad_tip overrides rad_head */
-
+	
+	float        roll1, roll2;           /* curved bones settings - these define the "restpose" for a curved bone */
+	float		 curveInX, curveInY;
+	float		 curveOutX, curveOutY;
+	float		 scaleIn, scaleOut;
+	
 	float        size[3];        /*  patch for upward compat, UNUSED! */
 	int          layer;          /* layers that bone appears on */
 	short        segments;       /*  for B-bones */
-	short        pad[1];
+	
+	short		 pad1;
+
 } Bone;
 
 typedef struct bArmature {
@@ -204,7 +211,8 @@ typedef enum eBone_Flag {
 	BONE_TRANSFORM_CHILD        = (1 << 20),  /* Indicates that a parent is also being transformed */
 	BONE_UNSELECTABLE           = (1 << 21),  /* bone cannot be selected */
 	BONE_NO_LOCAL_LOCATION      = (1 << 22),  /* bone location is in armature space */
-	BONE_RELATIVE_PARENTING     = (1 << 23)   /* object child will use relative transform (like deform) */
+	BONE_RELATIVE_PARENTING     = (1 << 23),  /* object child will use relative transform (like deform) */
+	BONE_ADD_PARENT_END_ROLL    = (1 << 24)   /* it will add the parent end roll to the inroll */
 	
 } eBone_Flag;