mirror of https://github.com/CGAL/cgal
70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
/*! \file
|
|
* A construction of a Topological_map with 2 dimensional points.
|
|
*/
|
|
|
|
#include <CGAL/Cartesian.h>
|
|
|
|
#include <iostream>
|
|
|
|
#include <CGAL/Pm_default_dcel.h>
|
|
#include <CGAL/Topological_map.h>
|
|
|
|
typedef CGAL::Point_2<CGAL::Cartesian<double> > Point;
|
|
typedef CGAL::Segment_2<CGAL::Cartesian<double> > Curve;
|
|
|
|
typedef CGAL::Pm_dcel<CGAL::Pm_vertex_base<Point>,
|
|
CGAL::Pm_halfedge_base<Curve>,
|
|
CGAL::Pm_face_base > Dcel;
|
|
|
|
typedef CGAL::Topological_map<Dcel> Tpm;
|
|
|
|
typedef Tpm::Halfedge_handle Halfedge_handle;
|
|
typedef Tpm::Vertex_handle Vertex_handle;
|
|
typedef Tpm::Face_handle Face_handle;
|
|
|
|
int main()
|
|
{
|
|
Point p1(0, 0), p2(0, 1), p3(1, 1);
|
|
Curve c1(p1, p2), c2(p2, p3), c3(p3, p1);
|
|
|
|
Tpm t;
|
|
|
|
Face_handle uf = t.unbounded_face();
|
|
|
|
Halfedge_handle e1 = t.insert_in_face_interior(uf);
|
|
e1->set_curve(c1);e1->twin()->set_curve(c1);
|
|
e1->source()->set_point(p1);
|
|
e1->target()->set_point(p2);
|
|
CGAL_assertion(t.is_valid());
|
|
std::cout << "Curve " << c1 << " inserted in unbounded face interior"
|
|
<< std::endl;
|
|
|
|
Halfedge_handle e2 = t.insert_from_vertex(e1);
|
|
e2->set_curve(c2);
|
|
e2->twin()->set_curve(c2);
|
|
e2->target()->set_point(p3);
|
|
CGAL_assertion(t.is_valid());
|
|
std::cout << "Curve " << c2 << " inserted from vertex "
|
|
<< e1->target()->point() << std::endl;
|
|
|
|
Halfedge_handle e3 = t.insert_at_vertices(e2, e1->twin());
|
|
e3->set_curve(c3);
|
|
e3->twin()->set_curve(c3);
|
|
CGAL_assertion(t.is_valid());
|
|
std::cout << "Curve " << c3 << " inserted between vertices "
|
|
<< e2->target()->point() << " and "
|
|
<< e1->twin()->target()->point() << std::endl;
|
|
|
|
Face_handle nf = e3->face();
|
|
|
|
// Print the vertices of the new face. Their order should be 1 1, 0 0, 0 1
|
|
Tpm::Ccb_halfedge_circulator cc = nf->outer_ccb();
|
|
std::cout << std::endl << "Order of vertices in new face : "
|
|
<< cc->source()->point();
|
|
for (++cc; cc != nf->outer_ccb(); ++cc)
|
|
std::cout << ", " << cc->source()->point();
|
|
std::cout << std::endl;
|
|
|
|
return 0;
|
|
}
|