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generate_cube.hh
1 #ifndef GENERATE_CUBE_HH
2 #define GENERATE_CUBE_HH
3 
4 template <typename MeshType>
5 size_t generate_cube( MeshType& mesh )
6 {
7  typedef typename MeshType::VertexHandle VertexHandle;
8  typedef typename MeshType::Point Point;
9 
10  typename MeshType::VertexHandle vhandle[8];
11 
12  vhandle[0] = mesh.add_vertex(Point(-1, -1, 1));
13  vhandle[1] = mesh.add_vertex(Point( 1, -1, 1));
14  vhandle[2] = mesh.add_vertex(Point( 1, 1, 1));
15  vhandle[3] = mesh.add_vertex(Point(-1, 1, 1));
16  vhandle[4] = mesh.add_vertex(Point(-1, -1, -1));
17  vhandle[5] = mesh.add_vertex(Point( 1, -1, -1));
18  vhandle[6] = mesh.add_vertex(Point( 1, 1, -1));
19  vhandle[7] = mesh.add_vertex(Point(-1, 1, -1));
20 
21  // generate (quadrilateral) faces
22 
23  std::vector< VertexHandle > face_vhandles;
24 
25  face_vhandles.clear();
26  face_vhandles.push_back(vhandle[0]);
27  face_vhandles.push_back(vhandle[1]);
28  face_vhandles.push_back(vhandle[2]);
29  face_vhandles.push_back(vhandle[3]);
30  mesh.add_face(face_vhandles);
31 
32  face_vhandles.clear();
33  face_vhandles.push_back(vhandle[7]);
34  face_vhandles.push_back(vhandle[6]);
35  face_vhandles.push_back(vhandle[5]);
36  face_vhandles.push_back(vhandle[4]);
37  mesh.add_face(face_vhandles);
38 
39  face_vhandles.clear();
40  face_vhandles.push_back(vhandle[1]);
41  face_vhandles.push_back(vhandle[0]);
42  face_vhandles.push_back(vhandle[4]);
43  face_vhandles.push_back(vhandle[5]);
44  mesh.add_face(face_vhandles);
45 
46  face_vhandles.clear();
47  face_vhandles.push_back(vhandle[2]);
48  face_vhandles.push_back(vhandle[1]);
49  face_vhandles.push_back(vhandle[5]);
50  face_vhandles.push_back(vhandle[6]);
51  mesh.add_face(face_vhandles);
52 
53  face_vhandles.clear();
54  face_vhandles.push_back(vhandle[3]);
55  face_vhandles.push_back(vhandle[2]);
56  face_vhandles.push_back(vhandle[6]);
57  face_vhandles.push_back(vhandle[7]);
58  mesh.add_face(face_vhandles);
59 
60  face_vhandles.clear();
61  face_vhandles.push_back(vhandle[0]);
62  face_vhandles.push_back(vhandle[3]);
63  face_vhandles.push_back(vhandle[7]);
64  face_vhandles.push_back(vhandle[4]);
65  mesh.add_face(face_vhandles);
66 
67  return mesh.n_vertices();
68 };
69 
70 #endif