CGAL 5.2.1 - 3D Polyhedral Surface
Polyhedron/polyhedron_prog_incr_builder.cpp
#include <CGAL/Simple_cartesian.h>
#include <CGAL/Polyhedron_incremental_builder_3.h>
#include <CGAL/Polyhedron_3.h>
// A modifier creating a triangle with the incremental builder.
template <class HDS>
class Build_triangle : public CGAL::Modifier_base<HDS> {
public:
Build_triangle() {}
void operator()( HDS& hds) {
// Postcondition: hds is a valid polyhedral surface.
B.begin_surface( 3, 1, 6);
typedef typename HDS::Vertex Vertex;
typedef typename Vertex::Point Point;
B.add_vertex( Point( 0, 0, 0));
B.add_vertex( Point( 1, 0, 0));
B.add_vertex( Point( 0, 1, 0));
B.end_facet();
}
};
typedef CGAL::Polyhedron_3<Kernel> Polyhedron;
typedef Polyhedron::HalfedgeDS HalfedgeDS;
int main() {
Polyhedron P;
Build_triangle<HalfedgeDS> triangle;
P.delegate( triangle);
CGAL_assertion( P.is_triangle( P.halfedges_begin()));
return 0;
}