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/*
* Edge_length_cost.h
*
* Created on: Feb 13, 2014
* Author: dsalinas
*/
#ifndef GUDHI_EDGE_LENGTH_COST_H_
#define GUDHI_EDGE_LENGTH_COST_H_
#include "Cost_policy.h"
namespace Gudhi{
namespace contraction {
/**
* @brief return a cost corresponding to the squared length of the edge
*/
template< typename EdgeProfile> class Edge_length_cost : public Cost_policy<EdgeProfile>{
public:
typedef typename Cost_policy<EdgeProfile>::Cost_type Cost_type;
typedef typename EdgeProfile::Point Point;
Cost_type operator()(const EdgeProfile& profile, const boost::optional<Point>& placement) const override{
double res = 0;
auto p0_coord = profile.p0().begin();
auto p1_coord = profile.p1().begin();
for(; p0_coord != profile.p0().end(); p0_coord++, p1_coord++){
res += (*p0_coord - *p1_coord) * (*p0_coord - *p1_coord);
}
return res;
}
};
} // namespace contraction
} // namespace GUDHI
#endif /* GUDHI_EDGE_LENGTH_COST_H_ */
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