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// Copyright (c) 1997-2002 Max-Planck-Institute Saarbruecken (Germany).
// 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
// 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: svn+ssh://scm.gforge.inria.fr/svn/cgal/branches/next/Nef_3/include/CGAL/Nef_3/ID_support_handler.h $
// $Id: ID_support_handler.h 67117 2012-01-13 18:14:48Z lrineau $
//
//
// Author(s) : Peter Hachenberger <hachenberger@mpi-sb.mpg.de>
#ifndef CGAL_ID_SUPPORT_HANDLER
#define CGAL_ID_SUPPORT_HANDLER
#include <CGAL/Nef_3/SNC_indexed_items.h>
#include <CGAL/Unique_hash_map.h>
#include <map>
#undef CGAL_NEF_DEBUG
#define CGAL_NEF_DEBUG 131
#include <CGAL/Nef_2/debug.h>
namespace CGAL {
template<typename Items, typename Decorator>
class ID_support_handler {
typedef typename Decorator::SVertex_handle SVertex_handle;
typedef typename Decorator::SHalfedge_handle SHalfedge_handle;
typedef typename Decorator::SVertex_const_handle SVertex_const_handle;
typedef typename Decorator::SHalfedge_const_handle SHalfedge_const_handle;
typedef typename Decorator::SHalfloop_const_handle SHalfloop_const_handle;
public:
ID_support_handler() {}
int get_hash(int) { return 0; }
template<typename Handle> void initialize_hash(Handle h) {}
void initialize_hash(int i) {}
void handle_support(SVertex_handle ,
SHalfedge_const_handle ,
SHalfedge_const_handle ) {}
void handle_support(SVertex_handle ,
SHalfloop_const_handle ,
SHalfloop_const_handle ) {}
void handle_support(SVertex_handle,
SHalfloop_const_handle,
SHalfedge_const_handle) {}
void handle_support(SVertex_handle,
SHalfedge_const_handle,
SHalfloop_const_handle) {}
void handle_support(SVertex_handle,
SHalfedge_const_handle,
SVertex_const_handle) {}
void handle_support(SVertex_handle,
SVertex_const_handle,
SHalfedge_const_handle) {}
void handle_support(SVertex_handle,
SVertex_const_handle,
SVertex_const_handle) {}
void handle_support(SVertex_handle,
SVertex_const_handle) {}
void handle_support(SVertex_handle,
SVertex_const_handle,
SHalfloop_const_handle) {}
void handle_support(SVertex_handle,
SHalfloop_const_handle,
SVertex_const_handle) {}
void handle_support(SHalfedge_handle,
SHalfedge_const_handle,
SHalfedge_const_handle) {}
void handle_support(SHalfedge_handle,
SHalfedge_const_handle) {}
void handle_support(SHalfedge_handle,
SHalfloop_const_handle) {}
void handle_support(SHalfedge_handle,
SHalfedge_const_handle,
SHalfloop_const_handle) {}
void handle_support(SHalfedge_handle,
SHalfloop_const_handle,
SHalfedge_const_handle) {}
void handle_support(SHalfedge_handle,
SHalfloop_const_handle,
SHalfloop_const_handle) {}
};
template<typename Decorator>
class ID_support_handler<SNC_indexed_items, Decorator> {
typedef typename Decorator::SVertex_handle SVertex_handle;
typedef typename Decorator::SHalfedge_handle SHalfedge_handle;
typedef typename Decorator::SVertex_const_handle SVertex_const_handle;
typedef typename Decorator::SHalfedge_const_handle SHalfedge_const_handle;
typedef typename Decorator::SHalfloop_const_handle SHalfloop_const_handle;
typedef typename Decorator::Halffacet_const_handle Halffacet_const_handle;
typedef CGAL::Unique_hash_map<Halffacet_const_handle, int> F2E;
CGAL::Unique_hash_map<Halffacet_const_handle, F2E> f2m;
std::map<int, int> hash;
public:
ID_support_handler() {}
int get_hash(int i) {
int root(i);
while(hash[root] != root)
root = hash[root];
while(hash[i] != i) {
int tmp = hash[i];
hash[i] = root;
i = tmp;
}
return root;
}
void set_hash(int i, int parent) {
CGAL_assertion(parent <= i);
hash[get_hash(i)] = parent;
}
template<typename Handle>
void initialize_hash(Handle h) {
hash[h->get_index()] = h->get_index();
}
void initialize_hash(int i) {
hash[i] = i;
}
void hash_facet_pair(SVertex_handle sv,
Halffacet_const_handle f1,
Halffacet_const_handle f2) {
CGAL_NEF_TRACEN("hash_facet_pair " << sv->point() << std::endl
<< " " << f1->plane() << &f1 << std::endl
<< " " << f2->plane() << &f2);
if(f2m[f1][f2]==0) {
sv->set_index();
f2m[f1][f2] = sv->get_index();
CGAL_NEF_TRACEN("insert " << sv->point() << &*sv
<< ": " << f2m[f1][f2]);
CGAL_NEF_TRACEN("not defined, yet");
}
else {
CGAL_NEF_TRACEN("access " << sv->point() << &*sv);
sv->set_index(f2m[f1][f2]);
}
}
void handle_support(SVertex_handle sv,
SHalfedge_const_handle se1,
SHalfedge_const_handle se2) {
CGAL_NEF_TRACEN("handle support ee " << sv->point());
Halffacet_const_handle f1 = se1->get_index_facet();
if(f1->is_twin()) f1 = f1->twin();
Halffacet_const_handle f2 = se2->get_index_facet();
if(f2->is_twin()) f2 = f2->twin();
hash_facet_pair(sv, f1,f2);
}
void handle_support(SVertex_handle sv,
SHalfloop_const_handle sl1,
SHalfloop_const_handle sl2) {
Halffacet_const_handle f1 = sl1->get_index_facet();
if(f1->is_twin()) f1 = f1->twin();
Halffacet_const_handle f2 = sl2->get_index_facet();
if(f2->is_twin()) f2 = f2->twin();
hash_facet_pair(sv, f1,f2);
}
void handle_support(SVertex_handle sv,
SHalfloop_const_handle sl1,
SHalfedge_const_handle se2,
bool inverse_order = false) {
CGAL_NEF_TRACEN("handle support el " << sv->point());
Halffacet_const_handle f1 = sl1->get_index_facet();
if(f1->is_twin()) f1 = f1->twin();
Halffacet_const_handle f2 = se2->get_index_facet();
if(f2->is_twin()) f2 = f2->twin();
if(inverse_order)
hash_facet_pair(sv, f2,f1);
else
hash_facet_pair(sv, f1,f2);
}
void handle_support(SVertex_handle sv,
SHalfedge_const_handle se1,
SHalfloop_const_handle sl2) {
handle_support(sv,sl2,se1,true);
}
void handle_support(SVertex_handle sv,
SHalfedge_const_handle,
SVertex_const_handle sv2) {
CGAL_NEF_TRACEN("handle support ev " << sv->point());
sv->set_index(sv2->get_index());
}
void handle_support(SVertex_handle sv,
SVertex_const_handle sv1,
SHalfedge_const_handle se2) {
CGAL_NEF_TRACEN("handle support ve " << sv->point());
handle_support(sv,se2,sv1);
}
void handle_support(SVertex_handle sv,
SVertex_const_handle sv1,
SVertex_const_handle sv2) {
CGAL_NEF_TRACEN("handle support vv " << sv->point());
CGAL_NEF_TRACEN(" supported by " << sv1->point());
CGAL_NEF_TRACEN(" supported by " << sv2->point());
if(sv1->get_index() < sv2->get_index())
sv->set_index(sv1->get_index());
else
sv->set_index(sv2->get_index());
}
void handle_support(SVertex_handle sv,
SVertex_const_handle sv0) {
CGAL_NEF_TRACEN("handle support v " << sv->point());
sv->set_index(sv0->get_index());
}
void handle_support(SVertex_handle sv,
SVertex_const_handle sv1,
SHalfloop_const_handle) {
CGAL_NEF_TRACEN("handle support vl " << sv->point());
sv->set_index(sv1->get_index());
}
void handle_support(SVertex_handle sv,
SHalfloop_const_handle sl1,
SVertex_const_handle sv2) {
CGAL_NEF_TRACEN("handle support lv " << sv->point());
handle_support(sv, sv2, sl1);
}
void handle_support(SHalfedge_handle se,
SHalfedge_const_handle se1) {
if(!equal_not_opposite(se->circle(), se1->circle()))
se1 = se1->twin();
se->set_index(se1->get_index());
se->twin()->set_index(se1->twin()->get_index());
CGAL_NEF_TRACEN("se " << se->source()->point()
<< "->" << se->twin()->source()->point()
<< "|" << se->circle());
CGAL_NEF_TRACEN("se1 " << se1->get_index());
CGAL_NEF_TRACEN("se1->twin() " << se1->twin()->get_index());
CGAL_NEF_TRACEN("result " << se->get_index()
<< ", " << se->twin()->get_index());
}
void handle_support(SHalfedge_handle se,
SHalfloop_const_handle sl1) {
if(!equal_not_opposite(se->circle(), sl1->circle()))
sl1 = sl1->twin();
CGAL_assertion(se->circle() == sl1->circle());
se->set_index(sl1->get_index());
se->twin()->set_index(sl1->twin()->get_index());
CGAL_NEF_TRACEN("se " << se->source()->point()
<< "->" << se->twin()->source()->point()
<< "|" << se->circle());
CGAL_NEF_TRACEN("sl1 " << sl1->get_index());
CGAL_NEF_TRACEN("sl1->twin() " << sl1->twin()->get_index());
CGAL_NEF_TRACEN("result " << se->get_index()
<< ", " << se->twin()->get_index());
}
void handle_support(SHalfedge_handle se,
SHalfedge_const_handle se1,
SHalfedge_const_handle se2) {
if(!equal_not_opposite(se->circle(), se1->circle()))
se1 = se1->twin();
if(!equal_not_opposite(se->circle(), se2->circle()))
se2 = se2->twin();
CGAL_assertion(se->circle() == se1->circle());
CGAL_assertion(se->circle() == se2->circle());
CGAL_NEF_TRACEN("se " << se->source()->point()
<< "->" << se->twin()->source()->point()
<< "|" << se->circle());
CGAL_NEF_TRACEN("se1 " << se1->get_index());
CGAL_NEF_TRACEN("se2 " << se2->get_index());
CGAL_NEF_TRACEN("se1->twin() " << se1->twin()->get_index());
CGAL_NEF_TRACEN("se2->twin() " << se2->twin()->get_index());
int index1 = get_hash(se1->get_index());
int index2 = get_hash(se2->get_index());
if(index1 < index2) {
se->set_index(index1);
set_hash(se2->get_index(), index1);
} else {
se->set_index(index2);
set_hash(se1->get_index(), index2);
}
index1 = get_hash(se1->twin()->get_index());
index2 = get_hash(se2->twin()->get_index());
if(index1 < index2) {
se->twin()->set_index(index1);
set_hash(se1->twin()->get_index(), index1);
} else {
se->twin()->set_index(index2);
set_hash(se1->twin()->get_index(), index2);
}
CGAL_NEF_TRACEN("result " << se->get_index()
<< ", " << se->twin()->get_index());
}
void handle_support(SHalfedge_handle se,
SHalfedge_const_handle se1,
SHalfloop_const_handle sl2) {
if(!equal_not_opposite(se->circle(), se1->circle()))
se1 = se1->twin();
if(!equal_not_opposite(se->circle(), sl2->circle()))
sl2 = sl2->twin();
CGAL_assertion(se->circle() == se1->circle());
CGAL_assertion(se->circle() == sl2->circle());
CGAL_NEF_TRACEN("se " << se->source()->point()
<< "->" << se->twin()->source()->point()
<< "|" << se->circle());
CGAL_NEF_TRACEN("se1 " << se1->get_index());
CGAL_NEF_TRACEN("sl2 " << sl2->get_index());
CGAL_NEF_TRACEN("se1->twin() " << se1->twin()->get_index());
CGAL_NEF_TRACEN("sl2->twin() " << sl2->twin()->get_index());
int index1 = get_hash(se1->get_index());
int index2 = get_hash(sl2->get_index());
if(index1 < index2) {
se->set_index(index1);
set_hash(se1->get_index(), index1);
set_hash(sl2->get_index(), index1);
} else {
se->set_index(index2);
set_hash(se1->get_index(), index2);
set_hash(sl2->get_index(), index2);
}
index1 = get_hash(se1->twin()->get_index());
index2 = get_hash(sl2->twin()->get_index());
if(index1 < index2) {
se->twin()->set_index(index1);
set_hash(sl2->twin()->get_index(), index1);
} else {
se->twin()->set_index(index2);
set_hash(se1->twin()->get_index(), index2);
}
CGAL_NEF_TRACEN("result " << se->get_index()
<< ", " << se->twin()->get_index());
}
void handle_support(SHalfedge_handle se,
SHalfloop_const_handle sl1,
SHalfedge_const_handle se2) {
handle_support(se,se2,sl1);
}
void handle_support(SHalfedge_handle se,
SHalfloop_const_handle sl1,
SHalfloop_const_handle sl2) {
if(!equal_not_opposite(se->circle(), sl1->circle()))
sl1 = sl1->twin();
if(!equal_not_opposite(se->circle(), sl2->circle()))
sl2 = sl2->twin();
CGAL_assertion(se->circle() == sl1->circle());
CGAL_assertion(se->circle() == sl2->circle());
CGAL_NEF_TRACEN("se " << se->source()->point()
<< "->" << se->twin()->source()->point()
<< "|" << se->circle());
CGAL_NEF_TRACEN("sl1 " << sl1->get_index());
CGAL_NEF_TRACEN("sl2 " << sl2->get_index());
CGAL_NEF_TRACEN("sl1->twin() " << sl1->twin()->get_index());
CGAL_NEF_TRACEN("sl2->twin() " << sl2->twin()->get_index());
int index1 = get_hash(sl1->get_index());
int index2 = get_hash(sl2->get_index());
if(index1 < index2) {
se->set_index(index1);
set_hash(sl2->get_index(), index1);
} else {
se->set_index(index2);
set_hash(sl1->get_index(), index2);
}
index1 = get_hash(sl1->twin()->get_index());
index2 = get_hash(sl2->twin()->get_index());
if(index1 < index2) {
se->twin()->set_index(index1);
set_hash(sl2->twin()->get_index(), index1);
} else {
se->twin()->set_index(index2);
set_hash(sl1->twin()->get_index(), index2);
}
CGAL_NEF_TRACEN("result " << se->get_index()
<< ", " << se->twin()->get_index());
}
};
} //namespace CGAL
#endif // CGAL_ID_SUPPORT_HANDLER
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