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, 24 insertions, 1 deletions

diff --git a/source/blender/editors/armature/pose_utils.c b/source/blender/editors/armature/pose_utils.c
index 2ba1eedd33b..b960bec3603 100644
--- a/source/blender/editors/armature/pose_utils.c
+++ b/source/blender/editors/armature/pose_utils.c
@@ -71,7 +71,7 @@ static void fcurves_to_pchan_links_get(ListBase *pfLinks, Object *ob, bAction *a
 	ListBase curves = {NULL, NULL};
 	int transFlags = action_get_item_transforms(act, ob, pchan, &curves);
 	
-	pchan->flag &= ~(POSE_LOC | POSE_ROT | POSE_SIZE);
+	pchan->flag &= ~(POSE_LOC | POSE_ROT | POSE_SIZE | POSE_BBONE_SHAPE);
 	
 	/* check if any transforms found... */
 	if (transFlags) {
@@ -96,6 +96,8 @@ static void fcurves_to_pchan_links_get(ListBase *pfLinks, Object *ob, bAction *a
 			pchan->flag |= POSE_ROT;
 		if (transFlags & ACT_TRANS_SCALE)
 			pchan->flag |= POSE_SIZE;
+		if (transFlags & ACT_TRANS_BBONE)
+			pchan->flag |= POSE_BBONE_SHAPE;
 			
 		/* store current transforms */
 		copy_v3_v3(pfl->oldloc, pchan->loc);
@@ -105,6 +107,16 @@ static void fcurves_to_pchan_links_get(ListBase *pfLinks, Object *ob, bAction *a
 		copy_v3_v3(pfl->oldaxis, pchan->rotAxis);
 		pfl->oldangle = pchan->rotAngle;
 		
+		/* store current bbone values */
+		pfl->roll1 = pchan->roll1;
+		pfl->roll2 = pchan->roll2;
+		pfl->curveInX = pchan->curveInX;
+		pfl->curveInY = pchan->curveInY;
+		pfl->curveOutX = pchan->curveOutX;
+		pfl->curveOutY = pchan->curveOutY;
+		pfl->scaleIn = pchan->scaleIn;
+		pfl->scaleOut = pchan->scaleOut;
+		
 		/* make copy of custom properties */
 		if (pchan->prop && (transFlags & ACT_TRANS_PROP))
 			pfl->oldprops = IDP_CopyProperty(pchan->prop);
@@ -133,6 +145,7 @@ void poseAnim_mapping_get(bContext *C, ListBase *pfLinks, Object *ob, bAction *a
 			fcurves_to_pchan_links_get(pfLinks, ob, act, pchan);
 		}
 		CTX_DATA_END;
+		
 	}
 }
 
@@ -199,6 +212,16 @@ void poseAnim_mapping_reset(ListBase *pfLinks)
 		copy_v3_v3(pchan->rotAxis, pfl->oldaxis);
 		pchan->rotAngle = pfl->oldangle;
 		
+		/* store current bbone values */
+		pchan->roll1 = pfl->roll1;
+		pchan->roll2 = pfl->roll2;
+		pchan->curveInX = pfl->curveInX;
+		pchan->curveInY = pfl->curveInY;
+		pchan->curveOutX = pfl->curveOutX;
+		pchan->curveOutY = pfl->curveOutY;
+		pchan->scaleIn = pfl->scaleIn;
+		pchan->scaleOut = pfl->scaleOut;
+		
 		/* just overwrite values of properties from the stored copies (there should be some) */
 		if (pfl->oldprops)
 			IDP_SyncGroupValues(pfl->pchan->prop, pfl->oldprops);