Sculpt: Pose Brush Face Sets origin mode

This commit introduces a new mode for calculating the positions and
weights of the IK segments in the Pose Brush based on the Face Sets.

The first segment of the chain will always include all face sets inside
the brush radius and it will propagate until the boundary of the last
face sets added in the flood fill. Then consecutive connected face sets
are added to the chain until the chain length limit is reached or all
face sets of the mesh are already part of the chain.

This feature enables complete control over the pose brush origins in
case that is needed. Also, with this mode, the user can have a library
of base meshes with face sets already configured to get to the initial
pose as fast as possible.

Reviewed By: jbakker

Differential Revision: https://developer.blender.org/D7235

1 files changed, 7 insertions, 1 deletions

diff --git a/source/blender/makesdna/DNA_brush_types.h b/source/blender/makesdna/DNA_brush_types.h
index 59e9d3be58d..95d9216f550 100644
--- a/source/blender/makesdna/DNA_brush_types.h
+++ b/source/blender/makesdna/DNA_brush_types.h
@@ -291,6 +291,11 @@ typedef enum eBrushClothForceFalloffType {
   BRUSH_CLOTH_FORCE_FALLOFF_PLANE = 1,
 } eBrushClothForceFalloffType;
 
+typedef enum eBrushPoseOriginType {
+  BRUSH_POSE_ORIGIN_TOPOLOGY = 0,
+  BRUSH_POSE_ORIGIN_FACE_SETS = 1,
+} eBrushPoseOriginType;
+
 /* Gpencilsettings.Vertex_mode */
 typedef enum eGp_Vertex_Mode {
   /* Affect to Stroke only. */
@@ -406,7 +411,7 @@ typedef struct Brush {
   /** Source for fill tool color gradient application. */
   char gradient_fill_mode;
 
-  char _pad0[5];
+  char _pad0[1];
 
   /** Projection shape (sphere, circle). */
   char falloff_shape;
@@ -467,6 +472,7 @@ typedef struct Brush {
   float pose_offset;
   int pose_smooth_iterations;
   int pose_ik_segments;
+  int pose_origin_type;
 
   /* cloth */
   int cloth_deform_type;