Mesh: Remove unnecessary copy in modifier stack
These few lines making a copy of the final mesh were confusing. The goal (I'm fairly certain) is to make sure the cage mesh and final mesh aren't shared when applying the vertex coordinates to the final mesh. This can be done more simply though, in a way that avoids duplicating the final mesh if it already isn't shared. This works well in some basic tests with different modifiers. Though I doubt it was really a bottleneck anywhere, simplifying the modifier stack internals is always nice. Differential Revision: https://developer.blender.org/D15814
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@ -1572,11 +1572,9 @@ static void editbmesh_calc_modifiers(struct Depsgraph *depsgraph,
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* then we need to build one. */
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if (mesh_final) {
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if (deformed_verts) {
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Mesh *mesh_tmp = BKE_mesh_copy_for_eval(mesh_final, false);
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if (mesh_final != mesh_cage) {
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BKE_id_free(nullptr, mesh_final);
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if (mesh_final == mesh_cage) {
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mesh_final = BKE_mesh_copy_for_eval(mesh_final, false);
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}
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mesh_final = mesh_tmp;
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BKE_mesh_vert_coords_apply(mesh_final, deformed_verts);
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}
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}
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