// Backward compatible methods, please use the FSearchNode version. If the FSearchNode version are implemented, these methods will not be called at all. FNodeRef GetNeighbour(const FNodeRef NodeRef, const int32 NeighbourIndex) const; - returns neighbour ref FVector::FReal GetHeuristicCost(const FNodeRef StartNodeRef, const FNodeRef EndNodeRef) const; - estimate of cost from StartNode to EndNode from a NodeRef FVector::FReal GetTraversalCost(const FNodeRef StartNodeRef, const FNodeRef EndNodeRef) const; - real cost of traveling from StartNode directly to EndNode from a NodeRef