Add a heuristic using euclidean distance for cost

game/src/main/org/apollo/game/model/entity/path/EuclideanHeuristic.java

@@ -0,0 +1,17 @@
+package org.apollo.game.model.entity.path;
+
+import org.apollo.game.model.Position;
+
+/**
+ * A heuristic which uses <i>Euclidean</i> distance to calculate the cost for a movement.
+ */
+public final class EuclideanHeuristic extends Heuristic {
+
+	/**
+	 * @see Position#getDistance(Position)
+	 */
+	@Override
+	public int estimate(Position current, Position target) {
+		return current.getDistance(target);
+	}
+}