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meshoptimizer: Sync with upstream commit ea4558d1c

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ea4558d1c0
This commit is contained in:
Rémi Verschelde
2022-06-10 12:46:50 +02:00
parent cb7d5723b4
commit a3195dd4eb
4 changed files with 37 additions and 29 deletions
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10
thirdparty/meshoptimizer/simplifier.cpp vendored
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@@ -276,7 +276,15 @@ static void classifyVertices(unsigned char* result, unsigned int* loop, unsigned
{
unsigned int target = edges[j].next;
if (!hasEdge(adjacency, target, vertex))
if (target == vertex)
{
// degenerate triangles have two distinct edges instead of three, and the self edge
// is bi-directional by definition; this can break border/seam classification by "closing"
// the open edge from another triangle and falsely marking the vertex as manifold
// instead we mark the vertex as having >1 open edges which turns it into locked/complex
openinc[vertex] = openout[vertex] = vertex;
}
else if (!hasEdge(adjacency, target, vertex))
{
openinc[target] = (openinc[target] == ~0u) ? vertex : target;
openout[vertex] = (openout[vertex] == ~0u) ? target : vertex;