CGAL 4.7 - Triangulated Surface Mesh Simplification
GetCost Concept Reference

## Definition

The concept GetCost describes the requirements for the policy function object which gets the collapse cost of an edge.

The cost returned is a boost::optional value (i.e. it can be absent). An absent cost indicates that the edge should not be collapsed. This could be the result of a computational limitation (such as overflow), or can be intentionally returned to prevent the edge from being collapsed.

Refines:

DefaultConstructible

CopyConstructible

Has Models:

CGAL::Surface_mesh_simplification::Edge_length_cost<ECM>

CGAL::Surface_mesh_simplification::LindstromTurk_cost<ECM>

## Operations

template<class Profile >
boost::optional< typename
Profile::FT >
operator() (Profile const &edge_profile, boost::optional< typename Profile::Point > const &placement) const
Computes and returns the cost of collapsing the edge (represented by its profile), using the calculated placement. More...

## Member Function Documentation

template<class Profile >
 boost::optional GetCost::operator() ( Profile const & edge_profile, boost::optional< typename Profile::Point > const & placement ) const

Computes and returns the cost of collapsing the edge (represented by its profile), using the calculated placement.

Template Parameters
 Profile must be a model of EdgeProfile.