OpenVDB: Voxel Remesher

The voxel remesher introduces a new workflow for sculpting without any of the limitations of Dyntopo (no geometry errors or performance penalty when blocking shapes). It is also useful for simulations and 3D printing.

This commit includes:
- Voxel remesh operator, voxel size mesh property and general remesh flags.
- Paint mask reprojection.
- Geometry undo/redo for sculpt mode. This should support remesh operations as well as future tools that modify the topology of the sculpt in a single step, like trimming tools or mesh insert brushes.
- UI changes in the sculpt topbar and the mesh properties pannel.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D5407

1 files changed, 4 insertions, 1 deletions

diff --git a/source/blender/makesdna/DNA_mesh_types.h b/source/blender/makesdna/DNA_mesh_types.h
index 8a9a69ac178..caa7c98335a 100644
--- a/source/blender/makesdna/DNA_mesh_types.h
+++ b/source/blender/makesdna/DNA_mesh_types.h
@@ -193,9 +193,10 @@ typedef struct Mesh {
 
   short totcol;
 
+  float remesh_voxel_size;
+  char _pad1[4];
   /** Deprecated multiresolution modeling data, only keep for loading old files. */
   struct Multires *mr DNA_DEPRECATED;
-  void *_pad1;
 
   Mesh_Runtime runtime;
 } Mesh;
@@ -250,6 +251,8 @@ enum {
   ME_FLAG_UNUSED_8 = 1 << 8, /* cleared */
   ME_DS_EXPAND = 1 << 9,
   ME_SCULPT_DYNAMIC_TOPOLOGY = 1 << 10,
+  ME_REMESH_SMOOTH_NORMALS = 1 << 11,
+  ME_REMESH_REPROJECT_PAINT_MASK = 1 << 12,
 };
 
 /* me->cd_flag */