add vcglib

vcglib/apps/sample/polygonmesh_zonohedra/polygonmesh_zonohedra.cpp

@@ -0,0 +1,113 @@
+/****************************************************************************
+ * VCGLib                                                            o o     *
+ * Visual and Computer Graphics Library                            o     o   *
+ *                                                                _   O  _   *
+ * Copyright(C) 2004-2016                                           \/)\/    *
+ * Visual Computing Lab                                            /\/|      *
+ * ISTI - Italian National Research Council                           |      *
+ *                                                                    \      *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * 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 2 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 (http://www.gnu.org/licenses/gpl.txt)          *
+ * for more details.                                                         *
+ *                                                                           *
+ ****************************************************************************/
+
+#include <stdio.h>
+#include <vcg/complex/complex.h>
+#include <vcg/complex/algorithms/create/zonohedron.h>
+#include <vcg/complex/algorithms/polygon_support.h>
+#include <wrap/io_trimesh/export_off.h>
+
+
+
+class MyVertex;
+class MyEdge;
+class MyFace;
+
+struct MyUsedTypes: public vcg::UsedTypes<vcg::Use<MyVertex>::AsVertexType,vcg::Use<MyEdge>::AsEdgeType,vcg::Use<MyFace>::AsFaceType>{};
+
+class MyVertex : public vcg::Vertex< MyUsedTypes,vcg::vertex::Coord3f,vcg::vertex::BitFlags >{};
+
+class MyEdge : public vcg::Edge< MyUsedTypes > {};
+
+class MyFace : public vcg::Face< MyUsedTypes,
+    vcg::face::FFAdj,
+    vcg::face::VertexRef,
+    vcg::face::Normal3f,
+    vcg::face::BitFlags > {};
+
+// the main mesh class
+class MyMesh : public vcg::tri::TriMesh<std::vector<MyVertex>, std::vector<MyFace> > {};
+
+
+
+// example 1: build a cube as a Zonohedron
+void example1(){
+
+    vcg::tri::Zonohedron<float> z;
+    z.addVector( 0,0,1 );
+    z.addVector( 0,1,0 );
+    z.addVector( 1,0,0 );
+
+    MyMesh m;
+    z.createMesh(m); // this will be a cube
+
+    vcg::tri::UpdateTopology<MyMesh>::FaceFace(m); // needed by exporter
+
+    int savemask = vcg::tri::io::Mask::IOM_BITPOLYGONAL;
+    vcg::tri::io::ExporterOFF<MyMesh>::Save(m,"cube.off",savemask);
+}
+
+
+// example2: reads input file, builds zonohedra as described there
+void example2(){
+
+    FILE* f = fopen("input.txt","rt");
+    if (!f) return;
+
+    while (1) {
+
+        // read mesh name
+        char meshFilename[1024], fullMeshFilename[1024];
+        if (fscanf(f,"%s",meshFilename)!=1) break;
+        sprintf(fullMeshFilename,"%s.off",meshFilename);
+
+        // build input vector
+        vcg::tri::Zonohedron<float> z;
+        while (1) {
+            float a,b,c;
+            if (fscanf(f,"%f %f %f",&a, &b, &c)!=3) break;
+            z.addVector(a,b,c);
+        }
+
+        printf("Building %s from %lu vectors...\n",fullMeshFilename, z.vectors().size() );
+
+        MyMesh m;
+        z.createMesh(m);
+
+        vcg::tri::UpdateTopology<MyMesh>::FaceFace(m); // needed by exporter
+
+        // normally, faces with more than 4sides are split into parallelograms
+        // this merges them (optional, try removing it!)
+        vcg::tri::PolygonSupport<MyMesh,MyMesh>::MergeFlatFaces(m);
+
+        int savemask = vcg::tri::io::Mask::IOM_BITPOLYGONAL;
+        vcg::tri::io::ExporterOFF<MyMesh>::Save(m,fullMeshFilename,savemask);
+    }
+
+}
+
+int main(int , char **){
+    example1();
+    example2();
+    return 0;
+}