/usr/include/CGAL/intersections_d.h is in libcgal-dev 4.2-5ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// 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); you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 3 of the License,
// or (at your option) any later version.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL$
// $Id$
//
//
// Author(s) : Michael Seel
#ifndef CGAL_INTERSECTIONS_D_H
#define CGAL_INTERSECTIONS_D_H
#include <CGAL/basic.h>
namespace CGAL {
// Actually, we should better list the compilers which are inferior, i.e.
// the others, which need the additional useless code.
#if 1 // !defined(__PGI) // Try to see which compiler warn these days.
# define CGAL_REMOVE_FLOW_WARNING
#endif
template <class R>
Object intersection(const Line_d<R>& l1, const Line_d<R>& l2)
{ typedef typename R::Line_d_Line_d_pair ll_pair;
ll_pair LL(l1, l2);
switch (LL.intersection_type()) {
case ll_pair::NO_INTERSECTION:
default:
return Object();
case ll_pair::POINT: {
Point_d<R> pt;
LL.intersection(pt);
return make_object(pt);
}
case ll_pair::LINE:
return make_object(l1);
}
#ifdef CGAL_REMOVE_FLOW_WARNING
return Object(); // never reached
#endif
}
template <class R>
Object intersection(const Ray_d<R>& l1, const Ray_d<R>& l2)
{ typedef typename R::Ray_d_Ray_d_pair ll_pair;
ll_pair LL(l1,l2);
switch (LL.intersection_type()) {
case ll_pair::NO_INTERSECTION:
default:
return Object();
case ll_pair::POINT: {
Point_d<R> p;
LL.intersection(p);
return make_object(p);
}
case ll_pair::RAY: {
Ray_d<R> r;
LL.intersection(r);
return make_object(r);
}
case ll_pair::SEGMENT: {
Segment_d<R> s;
LL.intersection(s);
return make_object(s);
}
}
#ifdef CGAL_REMOVE_FLOW_WARNING
return Object(); // never reached
#endif
}
template <class R>
Object intersection(const Segment_d<R>& l1, const Segment_d<R>& l2)
{ typedef typename R::Segment_d_Segment_d_pair ll_pair;
ll_pair LL(l1,l2);
switch (LL.intersection_type()) {
case ll_pair::NO_INTERSECTION:
default:
return Object();
case ll_pair::POINT: {
Point_d<R> p;
LL.intersection(p);
return make_object(p);
}
case ll_pair::SEGMENT: {
Segment_d<R> s;
LL.intersection(s);
return make_object(s);
}
}
#ifdef CGAL_REMOVE_FLOW_WARNING
return Object(); // never reached
#endif
}
template <class R>
Object intersection(const Line_d<R>& l, const Ray_d<R>& r)
{ typedef typename R::Line_d_Ray_d_pair lr_pair;
lr_pair LR(l,r);
switch (LR.intersection_type()) {
case lr_pair::NO_INTERSECTION:
default:
return Object();
case lr_pair::POINT: {
Point_d<R> pt;
LR.intersection(pt);
return make_object(pt);
}
case lr_pair::RAY: {
return make_object(r);
}
}
#ifdef CGAL_REMOVE_FLOW_WARNING
return Object(); // never reached
#endif
}
template <class R>
Object intersection(const Ray_d<R>& r, const Line_d<R>& l)
{ return intersection(l,r); }
template <class R>
Object intersection(const Ray_d<R>& r, const Segment_d<R>& s)
{ typedef typename R::Ray_d_Segment_d_pair rs_pair;
rs_pair RS(r,s);
switch (RS.intersection_type()) {
case rs_pair::NO_INTERSECTION:
default:
return Object();
case rs_pair::POINT: {
Point_d<R> pt;
RS.intersection(pt);
return make_object(pt);
}
case rs_pair::SEGMENT: {
Segment_d<R> st;
RS.intersection(st);
return make_object(st);
}
}
#ifdef CGAL_REMOVE_FLOW_WARNING
return Object(); // never reached
#endif
}
template <class R>
Object intersection(const Segment_d<R>& s, const Ray_d<R>& r)
{ return intersection(r,s); }
template <class R>
Object intersection(const Line_d<R>& l, const Segment_d<R>& s)
{ typedef typename R::Line_d_Segment_d_pair rs_pair;
rs_pair RS(l,s);
switch (RS.intersection_type()) {
case rs_pair::NO_INTERSECTION:
default:
return Object();
case rs_pair::POINT: {
Point_d<R> pt;
RS.intersection(pt);
return make_object(pt);
}
case rs_pair::SEGMENT: {
Segment_d<R> st;
RS.intersection(st);
return make_object(st);
}
}
#ifdef CGAL_REMOVE_FLOW_WARNING
return Object(); // never reached
#endif
}
template <class R>
Object intersection(const Segment_d<R>& s, const Line_d<R>& l)
{ return intersection(l,s); }
template <class R>
Object intersection(const Line_d<R>& l, const Hyperplane_d<R>& h)
{
typedef typename R::Line_d_Hyperplane_d_pair lh_pair;
lh_pair LH(l,h);
switch (LH.intersection_type()) {
case lh_pair::NO_INTERSECTION:
default:
return Object();
case lh_pair::POINT: {
Point_d<R> pt;
LH.intersection(pt);
return make_object(pt);
}
case lh_pair::LINE:
return make_object(l);
}
#ifdef CGAL_REMOVE_FLOW_WARNING
return Object(); // never reached
#endif
}
template <class R>
Object intersection(const Hyperplane_d<R>& h, const Line_d<R>& l)
{ return intersection(l,h); }
template <class R>
Object intersection(const Ray_d<R>& r, const Hyperplane_d<R>& h)
{
typedef typename R::Ray_d_Hyperplane_d_pair rh_pair;
rh_pair RH(r,h);
switch (RH.intersection_type()) {
case rh_pair::NO_INTERSECTION:
default:
return Object();
case rh_pair::POINT: {
Point_d<R> pt;
RH.intersection(pt);
return make_object(pt);
}
case rh_pair::RAY:
return make_object(r);
}
#ifdef CGAL_REMOVE_FLOW_WARNING
return Object(); // never reached
#endif
}
template <class R>
Object intersection(const Hyperplane_d<R>& h, const Ray_d<R>& r)
{ return intersection(r,h); }
template <class R>
Object intersection(const Segment_d<R>& s, const Hyperplane_d<R>& h)
{ typedef typename R::Segment_d_Hyperplane_d_pair sh_pair;
sh_pair SH(s,h);
switch (SH.intersection_type()) {
case sh_pair::NO_INTERSECTION:
default:
return Object();
case sh_pair::POINT: {
Point_d<R> pt;
SH.intersection(pt);
return make_object(pt);
}
case sh_pair::SEGMENT:
return make_object(s);
}
#ifdef CGAL_REMOVE_FLOW_WARNING
return Object(); // never reached
#endif
}
template <class R>
Object intersection(const Hyperplane_d<R>& h, const Segment_d<R>& s)
{ return intersection(s,h); }
template <class R>
inline bool do_intersect(const Line_d<R> &l1, const Line_d<R> &l2)
{ typedef typename R::Line_d_Line_d_pair ll_pair;
ll_pair LL(l1,l2);
return LL.intersection_type() != ll_pair::NO_INTERSECTION;
}
template <class R>
inline bool do_intersect(const Ray_d<R> &l1, const Ray_d<R> &l2)
{ typedef typename R::Ray_d_Ray_d_pair ll_pair;
ll_pair LL(l1,l2);
return LL.intersection_type() != ll_pair::NO_INTERSECTION;
}
template <class R>
inline bool do_intersect(const Segment_d<R> &l1, const Segment_d<R> &l2)
{ typedef typename R::Segment_d_Segment_d_pair ll_pair;
ll_pair LL(l1,l2);
return LL.intersection_type() != ll_pair::NO_INTERSECTION;
}
template <class R>
inline bool do_intersect(const Line_d<R>& l, const Ray_d<R>& r)
{ typedef typename R::Line_d_Ray_d_pair lr_pair;
lr_pair LR(l,r);
return LR.intersection_type() != lr_pair::NO_INTERSECTION;
}
template <class R>
inline bool do_intersect(const Ray_d<R>& r, const Line_d<R>& l)
{ return do_intersect(l,r); }
template <class R>
inline bool do_intersect(const Line_d<R>& l, const Segment_d<R>& s)
{ typedef typename R::Line_d_Segment_d_pair ls_pair;
ls_pair LS(l,s);
return LS.intersection_type() != ls_pair::NO_INTERSECTION;
}
template <class R>
inline bool do_intersect(const Segment_d<R>& s, const Line_d<R>& l)
{ return do_intersect(l,s); }
template <class R>
inline bool do_intersect(const Ray_d<R>& r, const Segment_d<R>& s)
{ typedef typename R::Ray_d_Segment_d_pair rs_pair;
rs_pair RS(r,s);
return RS.intersection_type() != rs_pair::NO_INTERSECTION;
}
template <class R>
inline bool do_intersect(const Segment_d<R>& s, const Ray_d<R>& r)
{ return do_intersect(r,s); }
template <class R>
inline bool do_intersect(const Line_d<R>& l, const Hyperplane_d<R>& h)
{ typedef typename R::Line_d_Hyperplane_d_pair lh_pair;
lh_pair LH(l,h);
return LH.intersection_type() != lh_pair::NO_INTERSECTION;
}
template <class R>
inline bool do_intersect(const Hyperplane_d<R>& h, const Line_d<R>& l)
{ return do_intersect(l,h); }
template <class R>
inline bool do_intersect(const Ray_d<R>& r, const Hyperplane_d<R>& h)
{ typedef typename R::Ray_d_Hyperplane_d_pair rh_pair;
rh_pair RH(r,h);
return RH.intersection_type() != rh_pair::NO_INTERSECTION;
}
template <class R>
inline bool do_intersect(const Hyperplane_d<R>& h, const Ray_d<R>& r)
{ return do_intersect(r,h); }
template <class R>
inline bool do_intersect(const Segment_d<R>& s, const Hyperplane_d<R>& h)
{ typedef typename R::Segment_d_Hyperplane_d_pair sh_pair;
sh_pair SH(s,h);
return SH.intersection_type() != sh_pair::NO_INTERSECTION;
}
template <class R>
inline bool do_intersect(const Hyperplane_d<R>& h, const Segment_d<R>& s)
{ return do_intersect(s,h); }
} //namespace CGAL
#endif //CGAL_INTERSECTIONS_D_H
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