Sculpt: Mask Extract operator

This operator extracts the paint mask to a new mesh object. It can extract the paint mask creating a boundary loop in the geometry, making it ready for adding a subdivision surface modifier.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D5384

1 files changed, 26 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/shrinkwrap.c b/source/blender/blenkernel/intern/shrinkwrap.c
index 014a2c6d6ac..992ceda7b74 100644
--- a/source/blender/blenkernel/intern/shrinkwrap.c
+++ b/source/blender/blenkernel/intern/shrinkwrap.c
@@ -39,6 +39,7 @@
 #include "BLI_task.h"
 #include "BLI_math_solvers.h"
 
+#include "BKE_context.h"
 #include "BKE_shrinkwrap.h"
 #include "BKE_cdderivedmesh.h"
 #include "BKE_DerivedMesh.h"
@@ -1480,3 +1481,28 @@ void shrinkwrapModifier_deform(ShrinkwrapModifierData *smd,
     ss_mesh->release(ss_mesh);
   }
 }
+
+void BKE_shrinkwrap_mesh_nearest_surface_deform(struct bContext *C,
+                                                Object *ob_source,
+                                                Object *ob_target)
+{
+  Depsgraph *depsgraph = CTX_data_depsgraph_pointer(C);
+  struct Scene *sce = CTX_data_scene(C);
+  ShrinkwrapModifierData ssmd = {0};
+  ModifierEvalContext ctx = {depsgraph, ob_source, 0};
+  int totvert;
+
+  ssmd.target = ob_target;
+  ssmd.shrinkType = MOD_SHRINKWRAP_NEAREST_SURFACE;
+  ssmd.shrinkMode = MOD_SHRINKWRAP_ON_SURFACE;
+  ssmd.keepDist = 0.0f;
+
+  Mesh *src_me = ob_source->data;
+  float(*vertexCos)[3] = BKE_mesh_vert_coords_alloc(src_me, &totvert);
+
+  shrinkwrapModifier_deform(&ssmd, &ctx, sce, ob_source, src_me, NULL, -1, vertexCos, totvert);
+
+  BKE_mesh_vert_coords_apply(src_me, vertexCos);
+
+  MEM_freeN(vertexCos);
+}