/**
* Copyright (C) 2017 Jan Schäfer (jansch@users.sourceforge.net)
*
* 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.
*/
package org.jskat.ai.nn.input;
import org.jskat.data.Trick;
import org.jskat.player.ImmutablePlayerKnowledge;
import org.jskat.util.Card;
import org.jskat.util.Player;
/**
* Gets the network inputs for played cards in the game per trick
*/
public class TrickCardInputStrategy extends AbstractInputStrategy {
@Override
public int getNeuronCount() {
// 10 for tricks, 3 for trick forehand position, 3*32 for played cards
// in trick
return 10 * (3 + 3 * 32);
}
@Override
public double[] getNetworkInput(ImmutablePlayerKnowledge knowledge,
Card cardToPlay) {
double[] result = getEmptyInputs();
for (Trick trick : knowledge.getCompletedTricks()) {
setTrickInputs(result, trick);
}
setTrickInputs(result, knowledge.getCurrentTrick());
return result;
}
private void setTrickInputs(double[] result, Trick trick) {
// set trick forehand position
result[getTrickOffset(trick) + getTrickForehand(trick.getForeHand())] = ON;
// set already played cards
if (trick.getFirstCard() != null) {
result[getTrickOffset(trick) + 3
+ getNetworkInputIndex(trick.getFirstCard())] = ON;
}
if (trick.getSecondCard() != null) {
result[getTrickOffset(trick) + 3 + 32
+ getNetworkInputIndex(trick.getSecondCard())] = ON;
}
if (trick.getThirdCard() != null) {
result[getTrickOffset(trick) + 3 + 64
+ getNetworkInputIndex(trick.getThirdCard())] = ON;
}
}
protected int getTrickOffset(Trick trick) {
return trick.getTrickNumberInGame() * (3 + 3 * 32);
}
private static int getTrickForehand(Player player) {
int result = -1;
switch (player) {
case FOREHAND:
result = 0;
break;
case MIDDLEHAND:
result = 1;
break;
case REARHAND:
result = 2;
break;
default:
throw new IllegalArgumentException(
"Trick forehand player is unknown.");
}
return result;
}
}