`astar_heuristic<Graph, CostType>`

This class is a default implementation of the AStarHeuristic concept. It implements a "zero" heuristic -- a heuristic function that returns a cost of zero regardless of the vertex it is passed.

Model of

AStarHeuristic

Template Parameters

Parameter	Description	Default
Graph	The type of the graph being searched.
CostType	A type that can be used with the compare and combine functions passed to A*. Typically an integer or floating point type.

Where Defined

boost/graph/astar_search.hpp

Member Functions

This class implements the single member function required by AStarHeuristic:

Function	Description
CostType operator()(graph_traits<Graph>::vertex_descriptor u);	Called for the target of every out edge of a vertex being examined. Returns the cost, estimated by the heuristic, from vertex u to a goal.