ClosestHeuristic.java

package stray.pathfinding.heuristics;

import stray.pathfinding.AStarHeuristic;
import stray.pathfinding.Mover;
import stray.pathfinding.TileBasedMap;

/**
 * A heuristic that uses the tile that is closest to the target as the next best
 * tile.
 * 
 * @author Kevin Glass
 */
public class ClosestHeuristic implements stray.pathfinding.AStarHeuristic {

	/**
	 * @see AStarHeuristic#getCost(TileBasedMap, Mover, int, int, int, int)
	 */
	public float getCost(TileBasedMap map, Mover mover, int x, int y, int tx, int ty) {
		float dx = tx - x;
		float dy = ty - y;

		float result = (float) (Math.sqrt((dx * dx) + (dy * dy)));

		return result;
	}

}