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Fixes inefficient shuffle algorithm.

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Note that shuffling 13 times in a row is not necessary. Collections.shuffle will produce every possible shuffle with equal probability already.
This commit is contained in:
Meerkov
2018-04-16 20:40:20 -07:00
parent 130fc4ee18
commit 645d70e6ce
1 changed files with 2 additions and 20 deletions
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22
forge-game/src/main/java/forge/game/player/Player.java
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@@ -1608,26 +1608,8 @@ public class Player extends GameEntity implements Comparable<Player> {
return;
}
// overdone but wanted to make sure it was really random
final Random random = MyRandom.getRandom();
Collections.shuffle(list, random);
Collections.shuffle(list, random);
Collections.shuffle(list, random);
Collections.shuffle(list, random);
Collections.shuffle(list, random);
Collections.shuffle(list, random);
int s = list.size();
for (int i = 0; i < s; i++) {
list.add(random.nextInt(s - 1), list.remove(random.nextInt(s)));
}
Collections.shuffle(list, random);
Collections.shuffle(list, random);
Collections.shuffle(list, random);
Collections.shuffle(list, random);
Collections.shuffle(list, random);
Collections.shuffle(list, random);
// Note: Shuffling once is sufficient.
Collections.shuffle(list, MyRandom.getRandom());
getZone(ZoneType.Library).setCards(getController().cheatShuffle(list));