From 8b93265c19feeed2b758046359ac102a1f21278a Mon Sep 17 00:00:00 2001 From: Hans Goudey Date: Mon, 2 Aug 2021 13:47:32 -0400 Subject: Mesh: Tag normals dirty instead of calculating Because mesh vertex and face normals are just derived data, they can be calculated lazily instead of eagerly. Often normal calculation is a relatively expensive task, and the calculation is often redundant if the mesh is deformed afterwards anyway. Instead, normals should be calculated only when they are needed. This commit moves in that direction by adding a new function to tag a mesh's normals dirty and replacing normal calculation with it in some places. Differential Revision: https://developer.blender.org/D12107 --- source/blender/blenkernel/intern/mesh_normals.cc | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'source/blender/blenkernel/intern/mesh_normals.cc') diff --git a/source/blender/blenkernel/intern/mesh_normals.cc b/source/blender/blenkernel/intern/mesh_normals.cc index f496d6eada1..8740baa5aef 100644 --- a/source/blender/blenkernel/intern/mesh_normals.cc +++ b/source/blender/blenkernel/intern/mesh_normals.cc @@ -63,6 +63,12 @@ static CLG_LogRef LOG = {"bke.mesh_normals"}; /** \name Mesh Normal Calculation * \{ */ +void BKE_mesh_normals_tag_dirty(Mesh *mesh) +{ + mesh->runtime.cd_dirty_vert |= CD_MASK_NORMAL; + mesh->runtime.cd_dirty_poly |= CD_MASK_NORMAL; +} + /** * Call when there are no polygons. */ -- cgit v1.2.3