查找一个顶点的一层领域面

简介

查找一个顶点的一层领域面

代码

#include <iostream>
#include <vector>
// -------------------- OpenMesh
using namespace std;
#include <OpenMesh/Core/IO/MeshIO.hh>
#include <OpenMesh/Core/Mesh/TriMesh_ArrayKernelT.hh>
#include <OpenMesh/Core/Mesh/Handles.hh>
typedef OpenMesh::TriMesh_ArrayKernelT<>MyMesh;

int main()
{
	MyMesh mesh;
	// read mesh from stdin
	int a, x0, y0;
	if (!OpenMesh::IO::read_mesh(mesh, "C:/Users/lee/Desktop/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)// 找到匹配的点
			for (MyMesh::VertexFaceIter vf_it = mesh.vf_iter(*v_it); vf_it.is_valid(); ++vf_it)//这个顶点所带有的面迭代器
			{
				for (MyMesh::FaceHalfedgeIter fh_it = mesh.fh_begin(*vf_it); fh_it != mesh.fh_end(*vf_it); ++fh_it)//面的半边迭代器
																												   //一个面有3个半边
				{
					OpenMesh::ArrayKernel::VertexHandle to_v = mesh.to_vertex_handle(*fh_it);// 这个半边所带有的点的handle
					OpenMesh::Vec3f point = mesh.point(to_v);
					cout << "邻域面顶点坐标x:" << point.data()[0] << "  y:" << point.data()[1] << "  z:" << point.data()[2] << endl;
				}
				cout << "
";
			}
		else continue;
	}
	
	cin >> a;
	// write mesh to stdout
	if (!OpenMesh::IO::write_mesh(mesh, "output9.off"))
	{
		cerr << "Error: cannot write mesh to " << endl;
		return 1;
	}
	return 0;
}