CGAL 6.2 - Surface Mesh: Surface_mesh/sm_circulators.cpp

CGAL 6.2 - Surface Mesh

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Surface_mesh/sm_circulators.cpp
#include <CGAL/Simple_cartesian.h>
#include <CGAL/Surface_mesh.h>
#include <vector>
typedef CGAL::Simple_cartesian<double> K;
typedef CGAL::Surface_mesh<K::Point_3> Mesh;
typedef Mesh::Vertex_index vertex_descriptor;
typedef Mesh::Face_index face_descriptor;
int main()
{
Mesh m;
// u x
// +------------+
// | |
// | |
// | f |
// | |
// | |
// +------------+
// v w
// Add the points as vertices
vertex_descriptor u = m. add_vertex(K::Point_3(0,1,0));
vertex_descriptor v = m.add_vertex(K::Point_3(0,0,0));
vertex_descriptor w = m.add_vertex(K::Point_3(1,0,0));
vertex_descriptor x = m.add_vertex(K::Point_3(1,1,0));
face_descriptor f = m.add_face(u,v,w,x);
{
std::cout << "vertices around vertex " << v << std::endl;
CGAL::Vertex_around_target_circulator<Mesh> vbegin(m.halfedge(v),m), done(vbegin);
do {
std::cout << *vbegin++ << std::endl;
} while(vbegin != done);
}
{
std::cout << "vertices around face " << f << std::endl;
CGAL::Vertex_around_face_iterator<Mesh> vbegin, vend;
for(std::tie(vbegin, vend) = vertices_around_face(m.halfedge(f), m);
vbegin != vend;
++vbegin){
std::cout << *vbegin << std::endl;
}
}
// or the same again, but directly with a range based loop
for(vertex_descriptor vd : vertices_around_face(m.halfedge(f), m)){
std::cout << vd << std::endl;
}
return 0;
}
CGAL::Surface_mesh
This class is a data structure that can be used as halfedge data structure or polyhedral surface.
Definition: Surface_mesh.h:329
CGAL::Surface_mesh::add_vertex
Vertex_index add_vertex()
adds a new vertex, and resizes vertex properties if necessary.
Definition: Surface_mesh.h:973
CGAL::Vertex_around_face_iterator
CGAL::Vertex_around_target_circulator
CGAL::Simple_cartesian