1 files changed, 74 insertions, 0 deletions
diff --git a/hyp2mat/lib/polygon.h b/hyp2mat/lib/polygon.h
new file mode 100644
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--- /dev/null
+++ b/hyp2mat/lib/polygon.h
@@ -0,0 +1,74 @@
+/*
+ * hyp2mat - convert hyperlynx files to matlab scripts
+ * Copyright 2012 Koen De Vleeschauwer.
+ *
+ * This file is part of hyp2mat.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef POLYGON_H
+#define POLYGON_H
+
+#include "clipper.hpp"
+#include "hyp2mat.h"
+
+namespace Hyp2Mat {
+
+  bool IsClockwise (FloatPolygon& poly);
+  void Reverse (FloatPolygon& poly);
+
+  class Polygon {
+    public:
+      Polygon();
+      static void SetGrid(double new_grid);
+      static double AlignToGrid(double x);
+      static void SetArcPrecision(double new_arc_precision);
+      void AddEdge(FloatPolygon edge);
+      void AddHole(FloatPolygon hole);
+      void Offset(double delta);
+      void Simplify();
+      void Intersection(Polygon clip);
+      void Union(Polygon clip);
+      void Difference(Polygon clip);
+      void Xor(Polygon clip);
+      bool IsEmpty();
+      FloatPolygons Result();
+    private:
+      /* convert Hyp2Mat to Clipper */
+      void _AddEdge(FloatPolygon edge, bool orientation);
+      ClipperLib::IntPoint _convert(FloatPoint p);
+      ClipperLib::Polygon _convert(FloatPolygon edge);
+      ClipperLib::Polygon _unique(ClipperLib::Polygon p);
+  
+      /* Clipper polygon operations */
+      void _Execute(ClipperLib::ClipType op, Polygon clip);
+      ClipperLib::PolyFillType _filltype;
+  
+      /* convert Clipper to Hyp2Mat */
+      void _AddToPolygonList(ClipperLib::PolyNode& polynode, FloatPolygons& polygons, int level);
+      FloatPolygon _convert (ClipperLib::Polygon clip_poly);
+      FloatPoint _convert (ClipperLib::IntPoint p);
+
+      /* data */
+      ClipperLib::Polygons _subject;
+      static double _grid; /* resolution of x and y coordinates, identical for all polygons. */
+      static double _arc_precision; /* maximum difference between perfect circle arc and polygonal approximation */
+    };
+  
+};
+
+#endif
+
+/* not truncated */