139 lines
3.2 KiB
C++
139 lines
3.2 KiB
C++
// Copyright (c) 2000
|
|
// Utrecht University (The Netherlands),
|
|
// ETH Zurich (Switzerland),
|
|
// INRIA Sophia-Antipolis (France),
|
|
// Max-Planck-Institute Saarbruecken (Germany),
|
|
// and Tel-Aviv University (Israel). All rights reserved.
|
|
//
|
|
// This file is part of CGAL (www.cgal.org)
|
|
//
|
|
// $URL: https://github.com/CGAL/cgal/blob/v5.1/Cartesian_kernel/include/CGAL/Cartesian/Triangle_3.h $
|
|
// $Id: Triangle_3.h 0779373 2020-03-26T13:31:46+01:00 Sébastien Loriot
|
|
// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
|
|
//
|
|
//
|
|
// Author(s) : Andreas Fabri
|
|
|
|
#ifndef CGAL_CARTESIAN_TRIANGLE_3_H
|
|
#define CGAL_CARTESIAN_TRIANGLE_3_H
|
|
|
|
#include <CGAL/Handle_for.h>
|
|
#include <CGAL/array.h>
|
|
|
|
namespace CGAL {
|
|
|
|
template <class R_>
|
|
class TriangleC3
|
|
{
|
|
typedef typename R_::FT FT;
|
|
typedef typename R_::Point_3 Point_3;
|
|
typedef typename R_::Vector_3 Vector_3;
|
|
typedef typename R_::Plane_3 Plane_3;
|
|
typedef typename R_::Triangle_3 Triangle_3;
|
|
|
|
typedef std::array<Point_3, 3> Rep;
|
|
typedef typename R_::template Handle<Rep>::type Base;
|
|
|
|
Base base;
|
|
|
|
public:
|
|
typedef R_ R;
|
|
|
|
TriangleC3() {}
|
|
|
|
TriangleC3(const Point_3 &p, const Point_3 &q, const Point_3 &r)
|
|
: base(CGAL::make_array(p, q, r)) {}
|
|
|
|
bool operator==(const TriangleC3 &t) const;
|
|
bool operator!=(const TriangleC3 &t) const;
|
|
|
|
Plane_3 supporting_plane() const;
|
|
|
|
bool has_on(const Point_3 &p) const;
|
|
bool is_degenerate() const;
|
|
|
|
const Point_3 & vertex(int i) const;
|
|
const Point_3 & operator[](int i) const;
|
|
|
|
FT squared_area() const;
|
|
};
|
|
|
|
template < class R >
|
|
bool
|
|
TriangleC3<R>::operator==(const TriangleC3<R> &t) const
|
|
{
|
|
if (CGAL::identical(base, t.base))
|
|
return true;
|
|
|
|
int i;
|
|
for(i=0; i<3; i++)
|
|
if ( vertex(0) == t.vertex(i) )
|
|
break;
|
|
|
|
return (i<3) && vertex(1) == t.vertex(i+1) && vertex(2) == t.vertex(i+2);
|
|
}
|
|
|
|
template < class R >
|
|
inline
|
|
bool
|
|
TriangleC3<R>::operator!=(const TriangleC3<R> &t) const
|
|
{
|
|
return !(*this == t);
|
|
}
|
|
|
|
template < class R >
|
|
const typename TriangleC3<R>::Point_3 &
|
|
TriangleC3<R>::vertex(int i) const
|
|
{
|
|
if (i<0) i=(i%3)+3;
|
|
else if (i>2) i=i%3;
|
|
return (i==0) ? get_pointee_or_identity(base)[0] :
|
|
(i==1) ? get_pointee_or_identity(base)[1] :
|
|
get_pointee_or_identity(base)[2];
|
|
}
|
|
|
|
template < class R >
|
|
inline
|
|
const typename TriangleC3<R>::Point_3 &
|
|
TriangleC3<R>::operator[](int i) const
|
|
{
|
|
return vertex(i);
|
|
}
|
|
|
|
template < class R >
|
|
CGAL_KERNEL_MEDIUM_INLINE
|
|
typename TriangleC3<R>::FT
|
|
TriangleC3<R>::squared_area() const
|
|
{
|
|
return internal::squared_area(vertex(0), vertex(1), vertex(2), R());
|
|
}
|
|
|
|
template < class R >
|
|
inline
|
|
typename TriangleC3<R>::Plane_3
|
|
TriangleC3<R>::supporting_plane() const
|
|
{
|
|
return Plane_3(vertex(0), vertex(1), vertex(2));
|
|
}
|
|
|
|
template < class R >
|
|
inline
|
|
bool
|
|
TriangleC3<R>::
|
|
has_on(const typename TriangleC3<R>::Point_3 &p) const
|
|
{
|
|
return R().has_on_3_object()
|
|
(static_cast<const typename R::Triangle_3&>(*this), p);
|
|
}
|
|
|
|
template < class R >
|
|
bool
|
|
TriangleC3<R>::is_degenerate() const
|
|
{
|
|
return collinear(vertex(0),vertex(1),vertex(2));
|
|
}
|
|
|
|
} //namespace CGAL
|
|
|
|
#endif // CGAL_CARTESIAN_TRIANGLE_3_H
|