/**
* 指定したサイズ、置石で棋譜の{@link RootGameTree}を作成します。
*
* @param sgfSize 碁盤の大きさ
* @param handicap 置石の数(0:互先, 1:定先、2:二子…)
* @return 作成した棋譜。NOT NULL
* @throws org.unitarou.lang.NullArgumentException 引数が <code>null</code>の場合
* @throws IllegalArgumentException sgfSizeが正方形以外でnumberが2以上の場合
*/
public static RootGameTree createGame(SgfSize sgfSize, Handicap handicap) {
ArgumentChecker.throwIfNull(sgfSize, handicap);
RootGameTree rgt = new RootGameTree();
rgt.setSize(sgfSize);
rgt.setFileFormat(FileFormat.VERSION_4);
rgt.setCharset(new SgfCharset(Charset.defaultCharset()));
rgt.setGameMode(GameMode.IGO);
rgt.setGameType(GameType.GAME);
rgt.setStyle(Style.SIBLINGS_SHOW_VAL);
Node node = rgt.getSequence().getFirst();
node.addProperty(SgfId.HANDICAP.makeProperty(handicap));
node.addProperty(
SgfId.PLAYER_TO_PLAY.makeProperty(
(1 < handicap.getIntValue()) ? SgfColor.WHITE : SgfColor.BLACK));
Set<SgfPoint> handicappedStones = composeHandicapStone(sgfSize, handicap);
if (!handicappedStones.isEmpty()) {
node.addProperty(SgfId.ADD_BLACK.makeProperty(handicappedStones));
}
return rgt;
}
/**
* 引数の条件に合致した置き石を返します。
*
* @param sgfSize
* @param handicap
* @throws IllegalArgumentException sgfSizeが正方形以外でnumberが2以上の場合
* @return 置き石の座標。NOT NULL
*/
private static Set<SgfPoint> composeHandicapStone(SgfSize sgfSize, Handicap handicap) {
int hd = handicap.getIntValue();
if (hd < 2) {
return Collections.emptySet();
}
if (sgfSize.width() != sgfSize.height()) {
throw new IllegalArgumentException();
}
Set<SgfPoint> pointSet = new HashSet<SgfPoint>(9);
final int size = sgfSize.width();
int left = size + 1, middle = size + 1, right = size + 1;
if (size < 9) {
left = size / 5 + 1;
right = size - left + 1;
middle = size / 2 + 1;
} else if (size < 13) {
left = 3;
right = size - left + 1;
middle = size / 2 + 1;
} else {
left = 4;
right = size - left + 1;
middle = size / 2 + 1;
}
switch (hd) {
case 9:
pointSet.add(SgfPoint.create(sgfSize, middle, left));
pointSet.add(SgfPoint.create(sgfSize, middle, right));
case 7:
pointSet.add(SgfPoint.create(sgfSize, right, middle));
pointSet.add(SgfPoint.create(sgfSize, left, middle));
case 5:
pointSet.add(SgfPoint.create(sgfSize, middle, middle));
case 4:
pointSet.add(SgfPoint.create(sgfSize, right, right));
case 3:
pointSet.add(SgfPoint.create(sgfSize, left, left));
case 2:
pointSet.add(SgfPoint.create(sgfSize, right, left));
pointSet.add(SgfPoint.create(sgfSize, left, right));
break;
case 8:
pointSet.add(SgfPoint.create(sgfSize, middle, left));
pointSet.add(SgfPoint.create(sgfSize, middle, right));
case 6:
pointSet.add(SgfPoint.create(sgfSize, right, middle));
pointSet.add(SgfPoint.create(sgfSize, left, middle));
pointSet.add(SgfPoint.create(sgfSize, right, right));
pointSet.add(SgfPoint.create(sgfSize, left, left));
pointSet.add(SgfPoint.create(sgfSize, right, left));
pointSet.add(SgfPoint.create(sgfSize, left, right));
}
return pointSet;
}