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/*
* Skeleton_blockers_iterators_out.h
*
* Created on: Aug 25, 2014
* Author: dsalinas
*/
#ifndef GUDHI_SKELETON_BLOCKERS_VERTICES_ITERATORS_H_
#define GUDHI_SKELETON_BLOCKERS_VERTICES_ITERATORS_H_
#include "boost/iterator/iterator_facade.hpp"
namespace Gudhi{
namespace skbl {
/**
*@brief Iterator on the vertices of a simplicial complex
*@remark The increment operator go to the next active vertex.
*@remark Incrementation increases Vertex_handle.
*/
template<typename SkeletonBlockerComplex>
class Complex_vertex_iterator : public boost::iterator_facade
< Complex_vertex_iterator <SkeletonBlockerComplex>
, typename SkeletonBlockerComplex::Vertex_handle const
, boost::forward_traversal_tag
, typename SkeletonBlockerComplex::Vertex_handle const
>
{
friend class boost::iterator_core_access;
typedef typename SkeletonBlockerComplex::boost_vertex_iterator boost_vertex_iterator;
typedef typename SkeletonBlockerComplex::Vertex_handle Vertex_handle;
private:
const SkeletonBlockerComplex* complex;
std::pair<boost_vertex_iterator,boost_vertex_iterator> vertexIterator;
public:
Complex_vertex_iterator():complex(NULL){
}
Complex_vertex_iterator(const SkeletonBlockerComplex* complex_):
complex(complex_),
vertexIterator(vertices(complex_->skeleton)){
if(!finished() && !is_active()) {
goto_next_valid();
}
}
/**
* return an iterator to the end.
*/
Complex_vertex_iterator(const SkeletonBlockerComplex* complex_,int end):
complex(complex_),vertexIterator(vertices(complex_->skeleton)){
vertexIterator.first = vertexIterator.second ;
}
public:
void increment () {goto_next_valid();}
Vertex_handle dereference() const {
return(Vertex_handle(*(vertexIterator.first)));
}
bool equal(const Complex_vertex_iterator& other) const{
return vertexIterator == other.vertexIterator && complex == other.complex;
}
bool operator<(const Complex_vertex_iterator& other) const{
return dereference()<other.dereference();
}
private:
bool finished() const{
return vertexIterator.first == vertexIterator.second;
}
void goto_next_valid(){
++vertexIterator.first;
if(!finished() && !is_active()){
goto_next_valid();
}
}
bool is_active() const{
return ((*complex)[Vertex_handle(*vertexIterator.first)]).is_active();
}
};
template<typename SkeletonBlockerComplex>
class Complex_neighbors_vertices_iterator
: public boost::iterator_facade < Complex_neighbors_vertices_iterator<SkeletonBlockerComplex>
, typename SkeletonBlockerComplex::Vertex_handle const
, boost::forward_traversal_tag
, typename SkeletonBlockerComplex::Vertex_handle const
>
{
friend class boost::iterator_core_access;
typedef SkeletonBlockerComplex Complex;
typedef typename Complex::boost_adjacency_iterator boost_adjacency_iterator;
typedef typename Complex::Vertex_handle Vertex_handle;
typedef typename Complex::Edge_handle Edge_handle;
private:
const Complex* complex;
Vertex_handle v;
boost_adjacency_iterator current_;
boost_adjacency_iterator end_;
public:
// boost_adjacency_iterator ai, ai_end;
// for (tie(ai, ai_end) = adjacent_vertices(v.vertex, skeleton); ai != ai_end; ++ai){
Complex_neighbors_vertices_iterator():complex(NULL){
}
Complex_neighbors_vertices_iterator(const Complex* complex_,Vertex_handle v_):
complex(complex_),
v(v_){
tie(current_,end_) = adjacent_vertices(v.vertex, complex->skeleton);
}
/**
* returns an iterator to the end
*/
Complex_neighbors_vertices_iterator(const Complex* complex_,Vertex_handle v_,int end):
complex(complex_),
v(v_){
tie(current_,end_) = adjacent_vertices(v.vertex, complex->skeleton);
set_end();
}
void increment () {
if(current_ != end_)
++current_;
}
Vertex_handle dereference() const {
return(Vertex_handle(*current_));
}
bool equal(const Complex_neighbors_vertices_iterator& other) const{
return (complex== other.complex) && (v == other.v) && (current_ == other.current_) && (end_ == other.end_);
}
private:
//todo remove this ugly hack
void set_end(){
current_ = end_;
}
};
}
} // namespace GUDHI
#endif /* GUDHI_SKELETON_BLOCKERS_VERTICES_ITERATORS_H_ */
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