astar is an A* pathfinding implementation. Pather is an interface which allows A* searching on arbitrary objects which can represent a weighted graph.

goreland_example.go implements implements Pather for the sake of testing. This functionality forms the back end for goreland_test.go, and serves as a

A Tile is a tile in a grid which implements Pather.

A Truck is a Truck in a grid which implements Grapher.

World is a two dimensional map of Tiles.

node is a wrapper to store A* data for a Pather node.

nodeMap is a collection of nodes keyed by Pather nodes for quick reference.

A priorityQueue implements heap.Interface and holds Nodes. The priorityQueue is used to track open nodes by rank.