CGAL 6.1.2 - Surface Mesh: Surface_mesh/sm_iterators.cpp

CGAL 6.1.2 - Surface Mesh

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Surface_mesh/sm_iterators.cpp
#include <vector>
#include <CGAL/Simple_cartesian.h>
#include <CGAL/Surface_mesh.h>
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 << "all vertices " << std::endl;
// The vertex iterator type is a nested type of the Vertex_range
Mesh::Vertex_range::iterator vb, ve;
Mesh::Vertex_range r = m.vertices();
// The iterators can be accessed through the C++ range API
vb = r.begin();
ve = r.end();
// or the boost Range API
vb = std::begin(r);
ve = std::end(r);
// or with std::tie, as the CGAL range derives from std::pair
for(std::tie(vb, ve) = m.vertices(); vb != ve; ++vb){
// Print vertex index and vertex coordinates
std::cout << *vb << " " << m.point(*vb) << std::endl;
}
// Instead of the classical for loop one can use
// the boost macro for a range
for(vertex_descriptor vd : m.vertices()){
std::cout << vd << std::endl;
}
// or the C++11 for loop. Note that there is a ':' and not a ',' as in BOOST_FOREACH
for(vertex_descriptor vd : m.vertices()){
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:335
CGAL::Surface_mesh::add_vertex
Vertex_index add_vertex()
adds a new vertex, and resizes vertex properties if necessary.
Definition: Surface_mesh.h:979
CGAL::Simple_cartesian