Commit: 7a76223f1f12b6bb049df1864e5d0cda70060a8f
Author: Sybren A. Stüvel
Date: Wed Jun 6 12:21:36 2018 +0200
Branches: blender2.8
https://developer.blender.org/rB7a76223f1f12b6bb049df1864e5d0cda70060a8f
Ensure BKE_mesh_new_nomain_from_template() always has valid mxxx pointers
When the source mesh doesn't have the primary layers (CD_VERT for vdata,
etc.) the returned mesh also didn't have those layers, even when non-zero
elements were requested (for example requesting 4 vertices would still
result in mvert = NULL).
===================================================================
M source/blender/blenkernel/intern/mesh.c
===================================================================
diff --git a/source/blender/blenkernel/intern/mesh.c
b/source/blender/blenkernel/intern/mesh.c
index f2a5f3b5d5f..b325d8d02d9 100644
--- a/source/blender/blenkernel/intern/mesh.c
+++ b/source/blender/blenkernel/intern/mesh.c
@@ -670,6 +670,9 @@ static Mesh *mesh_new_nomain_from_template_ex(
mesh_tessface_clear_intern(me_dst, false);
}
+ /* The destination mesh should at least have valid primary CD layers,
+ * even in cases where the source mesh does not. */
+ mesh_ensure_cdlayers_primary(me_dst, do_tessface);
mesh_ensure_cdlayers_origindex(me_dst, false);
BKE_mesh_update_customdata_pointers(me_dst, false);
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