簡介

Hexahedron 六面體網格，基於 openVolumeMesh 格式的程式生成cube

code

// C++ includes
#include <iostream>
#include <vector>

// Include vector classes
#include <OpenVolumeMesh/Geometry/VectorT.hh>

// Include polyhedral mesh kernel
#include <OpenVolumeMesh/Mesh/PolyhedralMesh.hh>
#include <OpenVolumeMesh/FileManager/FileManager.hh>
// Make some typedefs to facilitate(使...容易) your life
typedef OpenVolumeMesh::Geometry::Vec3f         Vec3f;// 頂點的結構體
typedef OpenVolumeMesh::GeometryKernel<Vec3f>   PolyhedralMeshV3f; // 體的定義
int main(int _argc, char** _argv) {

    // Create mesh object
    PolyhedralMeshV3f myMesh;

    // Add eight(可能作者想生成一個體但是並沒有，生成了一個四稜錐) vertices
    OpenVolumeMesh::VertexHandle v0 = myMesh.add_vertex(Vec3f( 0.0, 0.0, 0.0));
    OpenVolumeMesh::VertexHandle v1 = myMesh.add_vertex(Vec3f( 1.0, 0.0, 0.0));
    OpenVolumeMesh::VertexHandle v2 = myMesh.add_vertex(Vec3f( 1.0, 1.0, 0.0));
    OpenVolumeMesh::VertexHandle v3 = myMesh.add_vertex(Vec3f( 0.0, 1.0, 0.0));
    OpenVolumeMesh::VertexHandle v4 = myMesh.add_vertex(Vec3f( 0.0, 0.0, 1.0));
	OpenVolumeMesh::VertexHandle v5 = myMesh.add_vertex(Vec3f( 1.0, 0.0, 1.0));
	OpenVolumeMesh::VertexHandle v6 = myMesh.add_vertex(Vec3f( 1.0, 1.0, 1.0));
	OpenVolumeMesh::VertexHandle v7 = myMesh.add_vertex(Vec3f( 0.0, 1.0, 1.0));
    
    std::vector<OpenVolumeMesh::VertexHandle> vertices;
    
    // Add faces
	vertices.push_back(v0); vertices.push_back(v3); vertices.push_back(v2); vertices.push_back(v1);
    OpenVolumeMesh::FaceHandle f0 = myMesh.add_face(vertices);
    
    vertices.clear();
    vertices.push_back(v4); vertices.push_back(v5);vertices.push_back(v6); vertices.push_back(v7);
    OpenVolumeMesh::FaceHandle f1 = myMesh.add_face(vertices);
    
    vertices.clear();
	vertices.push_back(v0); vertices.push_back(v1); vertices.push_back(v5); vertices.push_back(v4);
    OpenVolumeMesh::FaceHandle f2 = myMesh.add_face(vertices);
    
    vertices.clear();
    vertices.push_back(v1); vertices.push_back(v2);vertices.push_back(v6); vertices.push_back(v5);
    OpenVolumeMesh::FaceHandle f3 = myMesh.add_face(vertices);

	vertices.clear();
	vertices.push_back(v2); vertices.push_back(v3); vertices.push_back(v7); vertices.push_back(v6);
	OpenVolumeMesh::FaceHandle f4 = myMesh.add_face(vertices);
    
	vertices.clear();
	vertices.push_back(v0); vertices.push_back(v4); vertices.push_back(v7); vertices.push_back(v3);
	OpenVolumeMesh::FaceHandle f5 = myMesh.add_face(vertices);
    
    std::vector<OpenVolumeMesh::HalfFaceHandle> halffaces;
    
    // Add first Hexahedron
    halffaces.push_back(myMesh.halfface_handle(f0, 1)); // 0 1 4 正面
    halffaces.push_back(myMesh.halfface_handle(f1, 1)); // 1 2 4 正面
    halffaces.push_back(myMesh.halfface_handle(f2, 1)); // 0 1 2 背面
    halffaces.push_back(myMesh.halfface_handle(f3, 1)); // 0 4 2 底面
	halffaces.push_back(myMesh.halfface_handle(f4, 1)); // 0 1 2 背面
	halffaces.push_back(myMesh.halfface_handle(f5, 1)); // 0 4 2 底面
    myMesh.add_cell(halffaces);
    


    // Print positions of vertices to std out
    for(OpenVolumeMesh::VertexIter v_it = myMesh.vertices_begin();
            v_it != myMesh.vertices_end(); ++v_it) {

        std::cout << "Position of vertex " << v_it->idx() << ": " <<
            myMesh.vertex(*v_it) << std::endl;
    }
	OpenVolumeMesh::IO::FileManager fileManager;
	fileManager.writeFile("cube.ovm", myMesh);

    return 0;
}
 

file

OVM ASCII
Vertices
8
0 0 0
1 0 0
1 1 0
0 1 0
0 0 1
1 0 1
1 1 1
0 1 1
Edges
12
0 3
3 2
2 1
1 0
4 5
5 6
6 7
7 4
1 5
4 0
2 6
3 7
Faces
6
4 0 2 4 6
4 8 10 12 14
4 7 16 9 18
4 5 20 11 17
4 3 22 13 21
4 19 15 23 1
Polyhedra
1
6 1 3 5 7 9 11