Sculpt: Mask Expand operator

This operator is a combined version of mask expand and mask by normal from the sculpt branch. It can be used to quickly isolate parts of a model based on topology or curvature.
- Shift + A starts the operator in topology mode from the active vertex
- Shift + Alt + A starts the operator in curvature mode from the active vertex

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D5657

1 files changed, 2 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_paint.h b/source/blender/blenkernel/BKE_paint.h
index ef798479b23..10c3f42bba7 100644
--- a/source/blender/blenkernel/BKE_paint.h
+++ b/source/blender/blenkernel/BKE_paint.h
@@ -267,6 +267,8 @@ typedef struct SculptSession {
   float cursor_view_normal[3];
   struct RegionView3D *rv3d;
 
+  float pivot_pos[3];
+
   union {
     struct {
       struct SculptVertexPaintGeomMap gmap;