dxfngc

fix hole orientation to make inner offset work for holes
Parent ba3a06c
Stefan Schuermans

Stefan Schuermans commited on 2013-01-27 21:56:40
Showing 1 changed files, with 6 additions and 2 deletions.

src/polygons.cpp
View file @ 9268f0e
... ... 
@@ -124,9 +124,13 @@ bool Polygons::addLayer(const Layer &layer, double eqDist)
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     if (contained_in.at(ia) < 0) {
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       CgPolyHoles poly(simples.at(ia));
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       // find and add holes
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-      for (ib = 0; (size_t)ib < contained_in.size(); ++ib)
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-        if (contained_in.at(ib) == ia)
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+      for (ib = 0; (size_t)ib < contained_in.size(); ++ib) {
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+        if (contained_in.at(ib) == ia) {
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+          // holes must be counter-clockwise
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+          simples.at(ib).reverse_orientation();
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           poly.add_hole(simples.at(ib));
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+        }
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+      }
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       // add polygon to member variable
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       mPolys.push_back(poly);
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     }
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