Modifiers: Simple Deform & Build, DerivedMesh → Mesh

This commit introduces `EditMeshData`. The fields in this struct are
extracted from `EditDerivedBMesh` into their own struct `EditMeshData`,
which can then also be used by the `Mesh` struct. This allows passing
deformed vertices efficiently to the draw routines.

The modifier code constructs a new Mesh instead of writing to ob->data;
even when ob->data is a CoW copy, it can still be used by different
objects and thus shouldn't be modified by a modifier.

1 files changed, 8 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_mesh.h b/source/blender/blenkernel/BKE_mesh.h
index 25ea73827c9..f0b6522f525 100644
--- a/source/blender/blenkernel/BKE_mesh.h
+++ b/source/blender/blenkernel/BKE_mesh.h
@@ -93,6 +93,14 @@ struct Mesh *BKE_mesh_copy(struct Main *bmain, const struct Mesh *me);
 void BKE_mesh_update_customdata_pointers(struct Mesh *me, const bool do_ensure_tess_cd);
 void BKE_mesh_ensure_skin_customdata(struct Mesh *me);
 
+struct Mesh * BKE_mesh_from_template(
+        struct Mesh *me_src,
+        int numVerts, int numEdges, int numTessFaces,
+        int numLoops, int numPolys);
+
+bool BKE_mesh_ensure_edit_data(struct Mesh *me);
+bool BKE_mesh_clear_edit_data(struct Mesh *me);
+
 bool BKE_mesh_ensure_facemap_customdata(struct Mesh *me);
 bool BKE_mesh_clear_facemap_customdata(struct Mesh *me);