126 lines
3.4 KiB
C++
126 lines
3.4 KiB
C++
// Copyright (c) 1997 INRIA Sophia-Antipolis (France).
|
|
// All rights reserved.
|
|
//
|
|
// This file is part of CGAL (www.cgal.org).
|
|
//
|
|
// $URL: https://github.com/CGAL/cgal/blob/v5.1/TDS_2/include/CGAL/Triangulation_ds_face_2.h $
|
|
// $Id: Triangulation_ds_face_2.h 0779373 2020-03-26T13:31:46+01:00 Sébastien Loriot
|
|
// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
|
|
//
|
|
//
|
|
// Author(s) : Mariette Yvinec
|
|
|
|
#ifndef CGAL_TRIANGULATION_DS_FACE_2_H
|
|
#define CGAL_TRIANGULATION_DS_FACE_2_H
|
|
|
|
#include <CGAL/license/TDS_2.h>
|
|
|
|
|
|
#include <CGAL/basic.h>
|
|
#include <CGAL/Triangulation_utils_2.h>
|
|
|
|
namespace CGAL {
|
|
|
|
template < class Fb >
|
|
class Triangulation_ds_face_2
|
|
: public Fb
|
|
{
|
|
public:
|
|
typedef typename Fb::Triangulation_data_structure Tds;
|
|
typedef typename Tds::Vertex Vertex;
|
|
typedef typename Tds::Face Face;
|
|
typedef typename Tds::Vertex_handle Vertex_handle;
|
|
typedef typename Tds::Face_handle Face_handle;
|
|
|
|
public :
|
|
// creators
|
|
Triangulation_ds_face_2()
|
|
: Fb()
|
|
{}
|
|
|
|
Triangulation_ds_face_2(Vertex_handle v0, Vertex_handle v1, Vertex_handle v2)
|
|
: Fb(v0,v1,v2)
|
|
{}
|
|
|
|
Triangulation_ds_face_2(Vertex_handle v0, Vertex_handle v1, Vertex_handle v2,
|
|
Face_handle n0, Face_handle n1, Face_handle n2)
|
|
: Fb(v0,v1,v2,n0,n1,n2)
|
|
{}
|
|
|
|
Triangulation_ds_face_2( const Face& f)
|
|
: Fb(f)
|
|
{}
|
|
|
|
static int ccw(int i) {return Triangulation_cw_ccw_2::ccw(i);}
|
|
static int cw(int i) {return Triangulation_cw_ccw_2::cw(i);}
|
|
|
|
Vertex_handle mirror_vertex(int i) const;
|
|
int mirror_index(int i) const;
|
|
|
|
bool is_valid(bool verbose = false, int level = 0) const;
|
|
|
|
};
|
|
|
|
template < class Fb >
|
|
inline
|
|
typename Triangulation_ds_face_2<Fb>::Vertex_handle
|
|
Triangulation_ds_face_2<Fb>::
|
|
mirror_vertex(int i) const
|
|
{
|
|
CGAL_triangulation_precondition ( this->neighbor(i) != Face_handle()
|
|
&& this->dimension() >= 1);
|
|
//return neighbor(i)->vertex(neighbor(i)->index(this->handle()));
|
|
return this->neighbor(i)->vertex(mirror_index(i));
|
|
}
|
|
|
|
template < class Fb >
|
|
inline int
|
|
Triangulation_ds_face_2<Fb>::
|
|
mirror_index(int i) const
|
|
{
|
|
// return the index of opposite vertex in neighbor(i);
|
|
CGAL_triangulation_precondition (this->neighbor(i) != Face_handle() &&
|
|
this->dimension() >= 1);
|
|
if (this->dimension() == 1) {
|
|
return 1 - (this->neighbor(i)->index(this->vertex(1-i)));
|
|
}
|
|
return this->ccw( this->neighbor(i)->index(this->vertex(this->ccw(i))));
|
|
}
|
|
|
|
|
|
template < class Fb >
|
|
bool
|
|
Triangulation_ds_face_2<Fb>::
|
|
is_valid(bool verbose, int level) const
|
|
{
|
|
bool result = Fb::is_valid(verbose, level);
|
|
for(int i = 0; i <= this->dimension(); i++) {
|
|
Face_handle n = this->neighbor(i);
|
|
// the strange formulation in case dimension()==2
|
|
// is used to handle the cases of TDS allowing
|
|
// two faces with two common edges
|
|
int in;
|
|
if (this->dimension() == 0) in = 0;
|
|
else in = mirror_index(i);
|
|
result = result && ( this == &*(n->neighbor(in)) );
|
|
switch(this->dimension()) {
|
|
case 0 :
|
|
break;
|
|
case 1 :
|
|
result = result && in == 1-i;
|
|
result = result && ( this->vertex(1-i) == n->vertex(1-in));
|
|
break;
|
|
case 2 :
|
|
result = result && ( this->vertex(cw(i)) == n->vertex(ccw(in)))
|
|
&& ( this->vertex(ccw(i)) == n->vertex(cw(in)));
|
|
break;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
} //namespace CGAL
|
|
|
|
#endif //CGAL_TRIANGULATION_DS_FACE_2_H
|