C++ (Cpp) Straight_skeleton_2::halfedges_begin Examples

Example #1

File: straightSkeleton.cpp Project: amutu/SFCGAL

void straightSkeletonToMultiLineString(
	const CGAL::Straight_skeleton_2<K> & ss,
	MultiLineString& result
)
{
	typedef CGAL::Straight_skeleton_2<K> Ss ;

	typedef typename Ss::Vertex_const_handle     Vertex_const_handle ;
	typedef typename Ss::Halfedge_const_handle   Halfedge_const_handle ;
	typedef typename Ss::Halfedge_const_iterator Halfedge_const_iterator ;

	Halfedge_const_handle null_halfedge ;
	Vertex_const_handle   null_vertex ;

	for ( Halfedge_const_iterator it = ss.halfedges_begin(); it != ss.halfedges_end(); ++it ){
		// skip contour edge
		if ( ! it->is_bisector() ){
			continue ;
		}

		// avoid duplicates
		if ( it->opposite() < it ){
			continue ;
		}

		result.addGeometry( new LineString(
			Point( it->opposite()->vertex()->point() ),
			Point( it->vertex()->point() )
		) );
	}
}

Example #2

File: compare_kernels_simple_polygon_skeleton.cpp Project: Asuzer/cgal

void print_straight_skeleton( CGAL::Straight_skeleton_2<K> const& ss )
{
  typedef CGAL::Straight_skeleton_2<K> Ss ;
  
  typedef typename Ss::Vertex_const_handle     Vertex_const_handle ;
  typedef typename Ss::Halfedge_const_handle   Halfedge_const_handle ;
  typedef typename Ss::Halfedge_const_iterator Halfedge_const_iterator ;
  
  Halfedge_const_handle null_halfedge ;
  Vertex_const_handle   null_vertex ;

  std::cerr << "Straight skeleton with " << ss.size_of_vertices() 
            << " vertices, " << ss.size_of_halfedges()
            << " halfedges and " << ss.size_of_faces()
            << " faces" << std::endl ;
            
  for ( Halfedge_const_iterator i = ss.halfedges_begin(); i != ss.halfedges_end(); ++i )
  {
    if ( !i->is_bisector() ) continue;
    std::cout << "2 " ;
    print_point(i->opposite()->vertex()->point()) ;
    std::cout << " 0 " ;
    print_point(i->vertex()->point());
    std::cout << " 0\n" ;
    //std::cout << " " << ( i->is_bisector() ? "bisector" : "contour" ) << std::endl;
  }
}