01 package dk.deepthought.sidious.planner;
02
03 import dk.deepthought.sidious.supportsystem.State;
04
05 /**
06 * This class represents the heuristic function.
07 * <p>
08 * The heuristic method returns an estimated cost of getting to the goal from
09 * this vertex.
10 */
11 public interface Heuristic {
12
13 /**
14 * Method calculates an approximate cost from <code>state</code> to the
15 * goal state.
16 *
17 * @param state
18 * the input state for the calculation
19 * @return an approximate cost
20 */
21 public double h(State state);
22 }
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