/*
* Encog(tm) Core v3.3 - Java Version
* http://www.heatonresearch.com/encog/
* https://github.com/encog/encog-java-core
* Copyright 2008-2014 Heaton Research, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* For more information on Heaton Research copyrights, licenses
* and trademarks visit:
* http://www.heatonresearch.com/copyright
*/
package org.encog.ml.graph.search;
import org.encog.EncogError;
import org.encog.ml.graph.BasicNode;
import org.encog.ml.graph.EuclideanNode;
public class EuclideanCostEstimator implements CostEstimator {
@Override
public double estimateCost(BasicNode startingNode, SearchGoal goal) {
if( !(startingNode instanceof EuclideanNode) ) {
throw new EncogError("Starting node must be EuclideanNode.");
}
if( !(goal instanceof SimpleDestinationGoal) ) {
throw new EncogError("Goal must be SimpleDistanceGoal.");
}
SimpleDestinationGoal sdg = (SimpleDestinationGoal)goal;
EuclideanNode endingNode = (EuclideanNode)sdg.getGoalDestination();
return EuclideanNode.distance(
(EuclideanNode)startingNode,
endingNode);
}
}