/usr/include/CGAL/Dart.h is in libcgal-dev 4.2-5ubuntu1.
This file is owned by root:root, with mode 0o644.
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// 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) : Guillaume Damiand <guillaume.damiand@liris.cnrs.fr>
//
#ifndef CGAL_DART_H
#define CGAL_DART_H 1
#include <CGAL/Compact_container.h>
#include <CGAL/assertions.h>
#include <bitset>
namespace CGAL {
/** @file Dart.h
* Definition of nD dart.
*/
template < unsigned int d_, class Refs,
class Items_, class Alloc_ >
class Combinatorial_map_base;
template<class Map, unsigned int i, unsigned int nmi>
struct Remove_cell_functor;
namespace internal {
template <typename Map,unsigned int i>
struct basic_link_beta_functor;
template <typename CMap,unsigned int i>
struct link_beta_functor;
}
#define CGAL_BETAINV(i) (i>1?i:(i==1?0:1))
/** Definition of nD dart.
* The Dart class describes an nD dart (basic element of a
* combinatorial map). A dart is composed with handle towards its neighbors,
* a bitset containing Boolean marks, and handle towards enabled attributes.
* n is the dimension of the space (2 for 2D, 3 for 3D...)
* Refs the ref class
*/
template <int d, typename Refs>
struct Dart
{
template < unsigned int d_, class Refs_,
class Items_, class Alloc_ >
friend class Combinatorial_map_base;
template <class T, class Alloc_>
friend class Compact_container;
template<class Map, unsigned int i, unsigned int nmi>
friend struct Remove_cell_functor;
template<class Map, unsigned int i>
friend struct Contract_cell_functor;
template <typename Map,unsigned int i>
friend struct internal::link_beta_functor;
public:
typedef Dart<d,Refs> Self;
typedef typename Refs::Dart_handle Dart_handle;
typedef typename Refs::size_type size_type;
typedef typename Refs::Dart_const_handle Dart_const_handle;
typedef typename Refs::Helper Helper;
/// Typedef for attributes
template<int i>
struct Attribute_handle: public Refs::template Attribute_handle<i>
{};
template<int i>
struct Attribute_const_handle:
public Refs::template Attribute_const_handle<i>
{};
/// The number of used marks.
static const size_type NB_MARKS = Refs::NB_MARKS;
/// The dimension of the combinatorial map.
static const unsigned int dimension = d;
/** Return if this dart is free for adimension.
* @param i the dimension.
* @return true iff the dart is linked with NULL for \em adimension.
*/
template<unsigned int i>
bool is_free() const
{
CGAL_assertion(i <= dimension);
return mbeta[i] == Refs::null_dart_handle;
}
bool is_free(unsigned int i) const
{
CGAL_assertion(i <= dimension);
return mbeta[i] == Refs::null_dart_handle;
}
/** Return the highest dimension for which the dart is not free.
* @return the dimension d such that the dart is not d-free but k-free for
* all k>d. -1 if the dart is free for all d in {0..n}
*/
int highest_nonfree_dimension() const
{
for (int i=(int)dimension; i>=0; --i)
{ if ( !is_free(i) ) return i; }
return -1;
}
/** Return the beta of this dart for a given dimension.
* @param i the dimension.
* @return beta(\em i).
*/
template<unsigned int i>
Dart_handle beta()
{
CGAL_assertion(i <= dimension);
return mbeta[i];
}
Dart_handle beta(unsigned int i)
{
CGAL_assertion(i <= dimension);
return mbeta[i];
}
template<unsigned int i>
Dart_const_handle beta() const
{
CGAL_assertion(i <= dimension);
return mbeta[i];
}
Dart_const_handle beta(unsigned int i) const
{
CGAL_assertion(i <= dimension);
return mbeta[i];
}
/** Return the beta inverse of this dart for a given dimension.
* @param i the dimension.
* @return beta^{-1}(\em i).
*/
template<unsigned int i>
Dart_handle beta_inv()
{ return beta<CGAL_BETAINV(i)>(); }
Dart_handle beta_inv(unsigned int i)
{ return beta(CGAL_BETAINV(i)); }
template<unsigned int i>
Dart_const_handle beta_inv() const
{ return beta<CGAL_BETAINV(i)>(); }
Dart_const_handle beta_inv(unsigned int i) const
{ return beta(CGAL_BETAINV(i)); }
/** Return a dart belonging to the same edge and to the second vertex
* of the current edge (NULL if such a dart does not exist).
* @return An handle to the opposite dart.
*/
Dart_handle opposite()
{
for (unsigned int i = 2; i <= dimension; ++i)
if (!is_free(i)) return beta(i);
return NULL;
}
Dart_const_handle opposite() const
{
for (unsigned int i = 2; i <= dimension; ++i)
if (!is_free(i)) return beta(i);
return NULL;
}
/** Return a dart incident to the other extremity of the current edge,
* but contrary to opposite, non necessary to the same edge
* (NULL if such a dart does not exist).
* @return An handle to the opposite dart.
*/
Dart_handle other_extremity()
{
for (unsigned int i = 1; i <= dimension; ++i)
if (!is_free(i)) return beta(i);
return NULL;
}
Dart_const_handle other_extremity() const
{
for (unsigned int i = 1; i <= dimension; ++i)
if (!is_free(i)) return beta(i);
return NULL;
}
/// @return a handle on the i-attribute
template<int i>
typename Attribute_handle<i>::type attribute()
{
CGAL_static_assertion_msg(Helper::template Dimension_index<i>::value>=0,
"attribute<i> called but i-attributes are disabled.");
return CGAL::cpp11::get<Helper::template Dimension_index<i>::value>
(mattribute_handles);
}
template<int i>
typename Attribute_const_handle<i>::type attribute() const
{
CGAL_static_assertion_msg(Helper::template Dimension_index<i>::value>=0,
"attribute<i> called but i-attributes are disabled.");
return CGAL::cpp11::get<Helper::template Dimension_index<i>::value>
(mattribute_handles);
}
/** Link this dart with a given dart for a given dimension.
* @param adart the dart to link with.
* @param i the dimension.
*/
template<unsigned int i>
void basic_link_beta(Dart_handle adart)
{
CGAL_assertion(i <= dimension);
CGAL_assertion(this!=&*Refs::null_dart_handle);
mbeta[i] = adart;
}
void basic_link_beta(Dart_handle adart, unsigned int i)
{
CGAL_assertion(i <= dimension);
CGAL_assertion(this!=&*Refs::null_dart_handle);
mbeta[i] = adart;
}
/** Unlink this dart for a given dimension.
* @param i the dimension.
*/
template<unsigned int i>
void unlink_beta()
{
CGAL_assertion(i <= dimension);
mbeta[i] = Refs::null_dart_handle;
}
void unlink_beta(unsigned int i)
{
CGAL_assertion(i <= dimension);
mbeta[i] = Refs::null_dart_handle;
}
/// Set the handle on the i th attribute
template<int i>
void set_attribute( typename Attribute_handle<i>::type ahandle )
{
CGAL_static_assertion_msg(Helper::template Dimension_index<i>::value>=0,
"set_attribute<i> called but i-attributes are disabled.");
CGAL::cpp11::get<Helper::template Dimension_index<i>::value>
(mattribute_handles) = ahandle;
if (ahandle!=NULL) ahandle->inc_nb_refs();
}
protected:
/** Default constructor: initialise marks and beta of this dart.
* @param amarks the marks.
*/
Dart(const std::bitset<NB_MARKS>& amarks) : mmarks(amarks)
{
for (unsigned int i = 0; i <= dimension; ++i)
mbeta[i] = Refs::null_dart_handle;
Helper::template Foreach_enabled_attributes<Init_attribute_functor>::
run(this);
}
/** Return the mark value of a given mark number.
* @param amark the mark number.
* @return the value for this number.
*/
bool get_mark(int amark) const
{
CGAL_assertion(amark>=0 && (size_type)amark<NB_MARKS);
return mmarks[(size_type)amark];
}
/** Set the mark of a given mark number to a given value.
* @param amark the mark number.
* @param AValue the value.
*/
void set_mark(int amark, bool avalue) const
{
CGAL_assertion(amark>=0 && (size_type)amark<NB_MARKS);
mmarks.set((size_type)amark, avalue);
}
/** Return all the marks of this dart.
* @return the marks.
*/
std::bitset<NB_MARKS> get_marks() const
{ return mmarks; }
/** Set simultaneously all the marks of this dart to a given value.
* @param amarks the value of the marks.
*/
void set_marks(const std::bitset<NB_MARKS>& amarks) const
{ mmarks = amarks; }
/// Functor used to initialize all attributes to NULL.
struct Init_attribute_functor
{
template <int i>
static void run(Self* adart)
{ adart->template set_attribute<i>(NULL); }
};
public:
void * for_compact_container() const
{ return mbeta[0].for_compact_container(); }
void * & for_compact_container()
{ return mbeta[0].for_compact_container(); }
protected:
/// Beta for each dimension +1 (from 0 to dimension).
Dart_handle mbeta[dimension+1];
/// Attributes enabled
typename Helper::Attribute_handles mattribute_handles;
/// Values of Boolean marks.
mutable std::bitset<NB_MARKS> mmarks;
};
} // namespace CGAL
#endif // CGAL_DART_H //
// EOF //
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