Vertex/Weight Paint: Use PBVH for painting

2016 GSOC project by @nathanvollmer, see D2150

- Mirrored painting and radial symmetry, like in sculpt mode.
- Volume based splash prevention,
  which avoids painting vertices far away from the 3D brush location.
- Normal based splash prevention,
  which avoids painting vertices with normals opposite the normal
  at the 3D brush location.
- Blur mode now uses a nearest neighbor average.
- Average mode, which averages the color/weight
  of the vertices within the brush
- Smudge mode, which pulls the colors/weights
  along the direction of the brush
- RGB^2 color blending, which gives a more accurate
  blend between two colors
- multithreading support. (PBVH leaves are painted in parallel.)
- Foreground/background color picker in vertex paint

1 files changed, 4 insertions, 1 deletions

diff --git a/source/blender/blenkernel/BKE_pbvh.h b/source/blender/blenkernel/BKE_pbvh.h
index 927303f8b3c..cc84be6e2c1 100644
--- a/source/blender/blenkernel/BKE_pbvh.h
+++ b/source/blender/blenkernel/BKE_pbvh.h
@@ -32,6 +32,7 @@
 
 struct CCGElem;
 struct CCGKey;
+struct CCGDerivedMesh;
 struct CustomData;
 struct DMFlagMat;
 struct MPoly;
@@ -71,7 +72,7 @@ void BKE_pbvh_build_grids(PBVH *bvh, struct CCGElem **grid_elems,
                           struct CCGKey *key, void **gridfaces, struct DMFlagMat *flagmats,
                           unsigned int **grid_hidden);
 void BKE_pbvh_build_bmesh(PBVH *bvh, struct BMesh *bm, bool smooth_shading, struct BMLog *log, const int cd_vert_node_offset, const int cd_face_node_offset);
-
+void BKE_pbvh_set_ccgdm(PBVH *bvh, struct CCGDerivedMesh *ccgdm);
 void BKE_pbvh_free(PBVH *bvh);
 void BKE_pbvh_free_layer_disp(PBVH *bvh);
 
@@ -118,6 +119,7 @@ void BKE_pbvh_raycast_project_ray_root(
 void BKE_pbvh_node_draw(PBVHNode *node, void *data);
 void BKE_pbvh_draw(PBVH *bvh, float (*planes)[4], float (*face_nors)[3],
                    int (*setMaterial)(int matnr, void *attribs), bool wireframe, bool fast);
+void BKE_pbvh_draw_BB(PBVH *bvh);
 
 /* PBVH Access */
 typedef enum {
@@ -141,6 +143,7 @@ int BKE_pbvh_count_grid_quads(BLI_bitmap **grid_hidden,
 
 /* multires level, only valid for type == PBVH_GRIDS */
 void BKE_pbvh_get_grid_key(const PBVH *pbvh, struct CCGKey *key);
+struct CCGDerivedMesh *BKE_pbvh_get_ccgdm(const PBVH *bvh);
 
 /* Only valid for type == PBVH_BMESH */
 struct BMesh *BKE_pbvh_get_bmesh(PBVH *pbvh);