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Merge remote-tracking branch 'origin/blender-v3.2-release'

This commit is contained in:
Kévin Dietrich 2022-05-31 16:18:42 +02:00
parent 3d66ee8c97 a5dcae0c64
commit d356a4f280
1 changed files with 19 additions and 0 deletions
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19
source/blender/draw/intern/draw_cache_impl_subdivision.cc
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@ -1124,6 +1124,25 @@ static bool draw_subdiv_build_cache(DRWSubdivCache *cache,
cache->resolution = to_mesh_settings.resolution;
cache->num_coarse_poly = mesh_eval->totpoly;
/* To avoid floating point precision issues when evaluating patches at patch boundaries,
* ensure that all loops sharing a vertex use the same patch coordinate. This could cause
* the mesh to not be watertight, leading to shadowing artifacts (see T97877). */
blender::Vector<int> first_loop_index(cache->num_subdiv_verts, -1);
for (int i = 0; i < cache->num_subdiv_loops; i++) {
const int vertex = cache_building_context.subdiv_loop_subdiv_vert_index[i];
if (first_loop_index[vertex] != -1) {
continue;
}
first_loop_index[vertex] = i;
}
for (int i = 0; i < cache->num_subdiv_loops; i++) {
const int vertex = cache_building_context.subdiv_loop_subdiv_vert_index[i];
cache_building_context.patch_coords[i] =
cache_building_context.patch_coords[first_loop_index[vertex]];
}
/* Cleanup. */
MEM_SAFE_FREE(cache_building_context.vert_origindex_map);
MEM_SAFE_FREE(cache_building_context.edge_origindex_map);