简介
查找一个顶点的一层领域边
代码一
这个代码使用了太多的auto，其实不利于阅读，代码二，把auto更改了。
#include <iostream>
#include <vector>
// -------------------- OpenMesh
using namespace std;
#include <OpenMesh/Core/IO/MeshIO.hh>
#include <OpenMesh/Core/Mesh/TriMesh_ArrayKernelT.hh>
typedef OpenMesh::TriMesh_ArrayKernelT<>MyMesh;int main()
{MyMesh mesh;// read mesh from stdinint a, x0, y0;if (!OpenMesh::IO::read_mesh(mesh, "output8.off")){cerr << "Error: cannot write mesh to " << endl;return 1;}cout << "请输入您要查找邻域的顶点坐标:" << endl;cout << "x="; cin >> x0;cout << "y="; cin >> y0;for (MyMesh::VertexIter v_it = mesh.vertices_begin(); v_it != mesh.vertices_end(); ++v_it){// circulate around the current vertex auto point = mesh.point(*v_it);if (point.data()[0] == x0 && point.data()[1] == y0)//找到对应的点for (auto vh_it = mesh.voh_begin(*v_it); vh_it != mesh.voh_end(*v_it); ++vh_it) // 半边迭代器{auto h = mesh.next_halfedge_handle(*vh_it);// 这个顶点的下一条半边auto to_v = mesh.to_vertex_handle(h);// 下一条半边相对的点(handle)auto from_v = mesh.from_vertex_handle(h);// 下一条半边开始的点(handle)auto topoint = mesh.point(to_v);// 把handle转换为点的结构返回出去auto frompoint = mesh.point(from_v);// 同上cout << "邻域边两端顶点1坐标x:" << frompoint.data()[0] << " y:" << frompoint.data()[1] << " z:" << frompoint.data()[2] << endl;cout << "邻域边两端顶点2坐标x:" << topoint.data()[0] << " y:" << topoint.data()[1] << " z:" << topoint.data()[2] << endl;cout << "\n" << endl;}else continue;}cin >> a;// write mesh to stdoutif (!OpenMesh::IO::write_mesh(mesh, "output9.off")){cerr << "Error: cannot write mesh to " << endl;return 1;}return 0;
}代码二
#include <iostream>
#include <vector>
// -------------------- OpenMesh
using namespace std;
#include <OpenMesh/Core/IO/MeshIO.hh>
#include <OpenMesh/Core/Mesh/TriMesh_ArrayKernelT.hh>
typedef OpenMesh::TriMesh_ArrayKernelT<>MyMesh;int main()
{MyMesh mesh;// read mesh from stdinint a, x0, y0;if (!OpenMesh::IO::read_mesh(mesh, "output8.off")){cerr << "Error: cannot write mesh to " << endl;return 1;}cout << "请输入您要查找邻域的顶点坐标:" << endl;cout << "x="; cin >> x0;cout << "y="; cin >> y0;for (MyMesh::VertexIter v_it = mesh.vertices_begin(); v_it != mesh.vertices_end(); ++v_it){// circulate around the current vertex OpenMesh::Vec3f point = mesh.point(*v_it);if (point.data()[0] == x0 && point.data()[1] == y0)//找到对应的点for (auto vh_it = mesh.voh_begin(*v_it); vh_it != mesh.voh_end(*v_it); ++vh_it) // 半边迭代器{auto h = mesh.next_halfedge_handle(*vh_it);// 这个顶点的下一条半边OpenMesh::ArrayKernel::VertexHandle to_v = mesh.to_vertex_handle(h);// 下一条半边相对的点(handle)OpenMesh::ArrayKernel::VertexHandle from_v = mesh.from_vertex_handle(h);// 下一条半边开始的点(handle)OpenMesh::Vec3f topoint = mesh.point(to_v);// 把handle转换为点的结构返回出去OpenMesh::Vec3f frompoint = mesh.point(from_v);// 同上cout << "邻域边两端顶点1坐标x:" << frompoint.data()[0] << " y:" << frompoint.data()[1] << " z:" << frompoint.data()[2] << endl;cout << "邻域边两端顶点2坐标x:" << topoint.data()[0] << " y:" << topoint.data()[1] << " z:" << topoint.data()[2] << endl;cout << "\n" << endl;}else continue;}cin >> a;// write mesh to stdoutif (!OpenMesh::IO::write_mesh(mesh, "output9.off")){cerr << "Error: cannot write mesh to " << endl;return 1;}return 0;
}
)
