add vcglib

vcglib/apps/sample/trimesh_topology/trimesh_topology.cpp

@@ -0,0 +1,95 @@
+/****************************************************************************
+* 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<vcg/complex/complex.h>
+#include<vcg/complex/algorithms/create/platonic.h>
+
+using namespace vcg;
+
+class MyEdge;
+class MyFace;
+class MyVertex;
+struct MyUsedTypes : public UsedTypes<	Use<MyVertex>::AsVertexType, Use<MyFace>::AsFaceType>{};
+
+class MyVertex  : public Vertex< MyUsedTypes, vertex::Coord3f, vertex::BitFlags  >{};
+class MyFace    : public Face  < MyUsedTypes, face::VertexRef,face::FFAdj, face::Mark, face::BitFlags > {};
+class MyMesh : public tri::TriMesh< std::vector<MyVertex>, std::vector<MyFace > >{};
+
+
+int main(int ,char ** )
+{
+  MyMesh m;
+
+  //generate a mesh
+  vcg::tri::Icosahedron(m);
+
+  //update the face-face topology
+  vcg::tri::UpdateTopology<MyMesh>::FaceFace(m);
+
+  // Now for each face the FFp() FFi() members are correctly initialized 
+
+  if(face::IsBorder(m.face[0],0)) printf("Edge 0 of face 0 is a border\n");
+  else printf("Edge 0 of face 0 is NOT a border\n"); // always this path!
+
+  vcg::face::FFDetach<MyFace>(m.face[0],0);  // Detach the face [0] from the mesh
+  vcg::face::FFDetach<MyFace>(m.face[0],1);
+  vcg::face::FFDetach<MyFace>(m.face[0],2);
+
+  if(face::IsBorder(m.face[0],0)) printf("Edge 0 of face 0 is a border\n"); // always this path!
+  else printf("Edge 0 of face 0 is NOT a border\n");
+
+  tri::Allocator<MyMesh>::DeleteFace(m,m.face[0]);
+
+  // declare an iterator on the mesh
+  vcg::face::Pos<MyMesh::FaceType> he, hei;
+
+  UnMarkAll(m);
+
+  // Now a simple search and trace of all the borders of the mesh
+  int BorderEdgeNum=0;
+  int HoleNum=0;
+  for(MyMesh::FaceIterator fi=m.face.begin();fi!=m.face.end();++fi) if(!(*fi).IsD())
+  {
+    for(int j=0;j<3;j++)
+    {
+      if ( face::IsBorder(*fi,j) && !tri::IsMarked(m,&*fi))
+      {
+        tri::Mark(m,&*fi);
+        hei.Set(&*fi,j,fi->V(j));
+        he=hei;
+        do
+        {
+          BorderEdgeNum++;
+          he.NextB(); // next pos along a border
+          tri::Mark(m,he.f);
+        }
+        while (he.f!=hei.f);
+        HoleNum++;
+      }
+    }
+  }
+
+  printf("Mesh has %i holes and %i border edges\n",HoleNum,BorderEdgeNum);
+  return 0;
+}
+