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, 21 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_brush.c b/source/blender/makesrna/intern/rna_brush.c
index 2a777c53cab..9615ac47738 100644
--- a/source/blender/makesrna/intern/rna_brush.c
+++ b/source/blender/makesrna/intern/rna_brush.c
@@ -1805,6 +1805,20 @@ static void rna_def_brush(BlenderRNA *brna)
        0,
        "Surface",
        "Smooths the surface of the mesh, preserving the volue"},
+  };
+
+  static const EnumPropertyItem brush_pose_origin_type_items[] = {
+      {BRUSH_POSE_ORIGIN_TOPOLOGY,
+       "TOPOLOGY",
+       0,
+       "Topology",
+       "Sets the rotation origin automatically using the topology and shape of the mesh as a "
+       "guide"},
+      {BRUSH_POSE_ORIGIN_FACE_SETS,
+       "FACE_SETS",
+       0,
+       "Face Sets",
+       "Creates a pose segment per face sets, starting from the active face set"},
       {0, NULL, 0, NULL, NULL},
   };
 
@@ -1928,6 +1942,13 @@ static void rna_def_brush(BlenderRNA *brna)
   RNA_def_property_ui_text(prop, "Deformation", "Deformation type that is used in the brush");
   RNA_def_property_update(prop, 0, "rna_Brush_update");
 
+  prop = RNA_def_property(srna, "pose_origin_type", PROP_ENUM, PROP_NONE);
+  RNA_def_property_enum_items(prop, brush_pose_origin_type_items);
+  RNA_def_property_ui_text(prop,
+                           "Rotation Origins",
+                           "Method to set the rotation origins for the segments of the brush");
+  RNA_def_property_update(prop, 0, "rna_Brush_update");
+
   prop = RNA_def_property(srna, "jitter_unit", PROP_ENUM, PROP_NONE); /* as an enum */
   RNA_def_property_enum_bitflag_sdna(prop, NULL, "flag");
   RNA_def_property_enum_items(prop, brush_jitter_unit_items);