diff options
Diffstat (limited to 'thirdparty/meshoptimizer/simplifier.cpp')
| -rw-r--r-- | thirdparty/meshoptimizer/simplifier.cpp | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/thirdparty/meshoptimizer/simplifier.cpp b/thirdparty/meshoptimizer/simplifier.cpp index ccc99edb1a..e40c141e76 100644 --- a/thirdparty/meshoptimizer/simplifier.cpp +++ b/thirdparty/meshoptimizer/simplifier.cpp @@ -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; |