public interface ILcdEdgeValueFunction<N,E>
ILcdEdgeValueFunctionis a general function which returns values associated with edges in a graph. Those values can describe all kinds of information: lengths, travel times, tracing capacities, ... The
ILcdEdgeValueFunctionwill only behave correctly if at least one of the two following conditions is met:
ILcdEdgeValueFunctionis fully symmetrical (i.e. the edge value in positive direction is the same as in negative direction, for all edges).
|Modifier and Type||Method and Description|
Returns the value associated with
Returns the order of this function.
double computeEdgeValue(ILcdGraph<N,E> aGraph, ILcdRoute<N,E> aPrecedingRoute, E aEdge, TLcdTraversalDirection aTraversalDirection)
aGraph- the graph from which the edge is part.
aPrecedingRoute- the route, to which the edge connects (i.e. the end node of this route is one of the two nodes connected by the edge). Depending on the function, the information used from this route in the calculation of the edge value can differ: a simple distance function will not use any information from this route, while a turn function which describes a relationship between two succeeding edges will typically use the last edge of the route in its calculation. The route should be completely contained in the given graph, otherwise the correct behavior of this method is not guaranteed.
aEdge- the edge for which a value should be returned. This edge should be part of the given graph and adjacent to the end of the given route, otherwise the correct behavior of this method is not guaranteed.
aTraversalDirection- indicating whether the traversal direction should be forward or backward. If
BACKWARD, the given edge will be traversed in opposite direction, and the preceding route becomes thus the succeeding route and vice versa.