Cull degenerate polygons as they're added

openscad · Mar 16, 2024 · 9eb7a13 · 9eb7a13
1 parent 2b663ed
commit 9eb7a13
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Showing 3 changed files with 2,109 additions and 1 deletion.
diff --git a/src/geometry/PolySetBuilder.cc b/src/geometry/PolySetBuilder.cc
@@ -110,7 +110,11 @@ void PolySetBuilder::beginPolygon(int nvertices) {
 
 void PolySetBuilder::addVertex(int ind)
 {
-  current_polygon_.push_back(ind);
+  // Ignore consecutive duplicate indices
+  if (current_polygon_.empty() || 
+      ind != current_polygon_.back() && ind != current_polygon_.front()) {
+    current_polygon_.push_back(ind);
+  }
 }
 
 void PolySetBuilder::addVertex(const Vector3d &v)