CGAL 6.1.2 - 3D Skin Surface Meshing: Skin_surface_3/skin_surface_retrieve_defining_weighted_points.cpp

CGAL 6.1.2 - 3D Skin Surface Meshing

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Skin_surface_3/skin_surface_retrieve_defining_weighted_points.cpp
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Skin_surface_3.h>
#include <CGAL/Polyhedron_3.h>
#include <CGAL/mesh_skin_surface_3.h>
#include <list>
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef CGAL::Skin_surface_traits_3<K> Traits;
typedef CGAL::Skin_surface_3<Traits> Skin_surface_3;
typedef Skin_surface_3::FT FT;
typedef Skin_surface_3::Bare_point Bare_point;
typedef Skin_surface_3::Weighted_point Weighted_point;
typedef CGAL::Skin_surface_polyhedral_items_3<Skin_surface_3> Polyhedral_items;
typedef CGAL::Polyhedron_3<K, Polyhedral_items> Polyhedron;
int main()
{
std::list<Weighted_point> l;
FT shrinkfactor = 0.5;
l.push_front(Weighted_point(Bare_point(0, 0, 0), 1));
l.push_front(Weighted_point(Bare_point(0, 1, 0), 2));
l.push_front(Weighted_point(Bare_point(0, 0, 2), 1));
Skin_surface_3 skin_surface(l.begin(), l.end(), shrinkfactor);
Polyhedron p;
CGAL::mesh_skin_surface_3(skin_surface, p);
for (Polyhedron::Facet_iterator fit = p.facets_begin(); fit != p.facets_end(); ++fit) {
// Retrieve the generating simplex from the regular triangulation
const Skin_surface_3::Simplex &s = fit->containing_simplex();
// Get the weighted points from the simplex
Skin_surface_3::Weighted_point wp[4];
switch (s.dimension()) {
case 0: {
Skin_surface_3::Vertex_handle vh = s;
wp[0] = vh->point();
break;
}
case 1: {
Skin_surface_3::Edge e = s;
wp[0] = e.first->vertex(e.second)->point();
wp[1] = e.first->vertex(e.third)->point();
break;
}
case 2: {
Skin_surface_3::Facet f = s;
wp[0] = f.first->vertex((f.second + 1) & 3)->point();
wp[1] = f.first->vertex((f.second + 2) & 3)->point();
wp[2] = f.first->vertex((f.second + 3) & 3)->point();
break;
}
case 3: {
Skin_surface_3::Cell_handle ch = s;
wp[0] = ch->vertex(0)->point();
wp[1] = ch->vertex(1)->point();
wp[2] = ch->vertex(2)->point();
wp[3] = ch->vertex(3)->point();
break;
}
}
}
return 0;
}
CGAL::Exact_predicates_inexact_constructions_kernel
CGAL::Polyhedron_3
CGAL::Skin_surface_3
The Skin_surface_3 is the main class in this package.
Definition: Skin_surface_3.h:19
CGAL::Skin_surface_traits_3
The class Skin_surface_traits_3 is designed as a default traits class for the class Skin_surface_3<Sk...
Definition: Skin_surface_traits_3.h:17
CGAL::mesh_skin_surface_3
void mesh_skin_surface_3(const SkinSurface_3 &skin_surface, Polyhedron &p)
constructs a mesh of the skin_surface in p.
CGAL::Skin_surface_polyhedral_items_3
An items class for the Polyhedron_3 that stores information in faces instead of an auxiliary data str...
Definition: Skin_surface_polyhedral_items_3.h:12