/*
* Encog(tm) Core v3.4 - Java Version
* http://www.heatonresearch.com/encog/
* https://github.com/encog/encog-java-core
* Copyright 2008-2016 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.world.grid.probability;
import org.encog.ml.world.Action;
import org.encog.ml.world.ActionProbability;
import org.encog.ml.world.grid.GridState;
import org.encog.ml.world.grid.GridWorld;
public abstract class GridAbstractProbability implements ActionProbability {
private final GridWorld world;
public GridAbstractProbability(GridWorld theWorld) {
this.world = theWorld;
}
public Action determineResultingAction(GridState s1, GridState s2) {
if( (s1.getRow()-1)==s2.getRow() && s1.getColumn()==s2.getColumn() ) {
return GridWorld.ACTION_NORTH;
} else if( (s1.getRow()==s2.getRow()+1) && s1.getColumn()==s2.getColumn() ) {
return GridWorld.ACTION_SOUTH;
} else if( s1.getRow()==s2.getRow() && (s1.getColumn()+1)==s2.getColumn() ) {
return GridWorld.ACTION_EAST;
} else if( s1.getRow()==s2.getRow() && (s1.getColumn()-1)==s2.getColumn() ) {
return GridWorld.ACTION_EAST;
}
return null;
}
public GridState determineActionState(GridState currentState, Action action) {
GridState result = null;
if( action==GridWorld.ACTION_NORTH) {
result = this.world.getState(currentState.getRow()-1, currentState.getColumn());
} else if( action==GridWorld.ACTION_SOUTH) {
result = this.world.getState(currentState.getRow()+1, currentState.getColumn());
} else if( action==GridWorld.ACTION_EAST) {
result = this.world.getState(currentState.getRow(), currentState.getColumn()+1);
} else if( action==GridWorld.ACTION_WEST) {
result = this.world.getState(currentState.getRow(), currentState.getColumn()-1);
}
if( result==null ) {
result = currentState;
}
return result;
}
/**
* @return the world
*/
public GridWorld getWorld() {
return world;
}
}