Initial commit of ResInsight version 0.4.8

VisualizationModules/LibGeometry/cvfTriangleMeshEdgeExtractor.h

@@ -0,0 +1,63 @@
+//##################################################################################################
+//
+//   Custom Visualization Core library
+//   Copyright (C) 2011-2012 Ceetron AS
+//    
+//   This library 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 library 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 at <<http://www.gnu.org/licenses/gpl.html>> 
+//   for more details. 
+//
+//##################################################################################################
+
+#pragma once
+
+#include "cvfArray.h"
+#include <map>
+
+namespace cvf {
+
+
+//==================================================================================================
+//
+// Extract mesh from triangles with a key per triangle. Mesh edges will not be produced between
+// triangles with the same key.
+//
+//==================================================================================================
+class TriangleMeshEdgeExtractor
+{
+public:
+    TriangleMeshEdgeExtractor();
+
+    void            addTriangles(const UIntArray& indices, const UIntArray& triangleKeys);
+
+    ref<UIntArray>  lineIndices() const;
+
+private:
+    std::map<int64, uint> m_edgeMap;
+
+    inline int64 edgeKey(uint v1, uint v2)
+    {
+        if (v1 < v2)
+        {
+            int64 key = v2;
+            key <<= 32;
+            return key + v1;
+        }
+
+        int64 key = v1;
+        key <<= 32;
+        return key + v2;
+    }
+
+    void addEdge(uint v1, uint v2, uint key);
+};
+
+}