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Check pointer before dereferencing it
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@ -65,13 +65,15 @@ void Sweep::FinalizationPolygon(SweepContext& tcx)
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// Get an Internal triangle to start with
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Triangle* t = tcx.front()->head()->next->triangle;
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Point* p = tcx.front()->head()->next->point;
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while (!t->GetConstrainedEdgeCW(*p)) {
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while (t && !t->GetConstrainedEdgeCW(*p)) {
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t = t->NeighborCCW(*p);
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}
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// Collect interior triangles constrained by edges
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if (t) {
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tcx.MeshClean(*t);
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}
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}
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Node& Sweep::PointEvent(SweepContext& tcx, Point& point)
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{
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@ -227,7 +229,7 @@ void Sweep::FillAdvancingFront(SweepContext& tcx, Node& n)
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// Fill right holes
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Node* node = n.next;
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while (node->next) {
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while (node && node->next) {
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// if HoleAngle exceeds 90 degrees then break.
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if (LargeHole_DontFill(node)) break;
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Fill(tcx, *node);
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@ -237,7 +239,7 @@ void Sweep::FillAdvancingFront(SweepContext& tcx, Node& n)
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// Fill left holes
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node = n.prev;
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while (node->prev) {
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while (node && node->prev) {
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// if HoleAngle exceeds 90 degrees then break.
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if (LargeHole_DontFill(node)) break;
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Fill(tcx, *node);
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