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Fix how random teleport picks a location (#3480)

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Tim S 2020-07-17 16:56:48 -04:00 committed by GitHub
parent c9b75aabb2
commit cedd42f411
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1 changed files with 20 additions and 3 deletions
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23
Essentials/src/com/earth2me/essentials/RandomTeleport.java
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@ -155,12 +155,29 @@ public class RandomTeleport implements IConf {
// Calculates a random location asynchronously.
private CompletableFuture<Location> calculateRandomLocation(Location center, double minRange, double maxRange) {
CompletableFuture<Location> future = new CompletableFuture<>();
final int dx = RANDOM.nextBoolean() ? 1 : -1, dz = RANDOM.nextBoolean() ? 1 : -1;
// Find an equally distributed offset by randomly rotating a point inside a rectangle about the origin
double rectX = RANDOM.nextDouble() * (maxRange - minRange) + minRange;
double rectZ = RANDOM.nextDouble() * (maxRange + minRange) - minRange;
double offsetX, offsetZ;
int transform = RANDOM.nextInt(4);
if (transform == 0) {
offsetX = rectX;
offsetZ = rectZ;
} else if (transform == 1) {
offsetX = -rectZ;
offsetZ = rectX;
} else if (transform == 2) {
offsetX = -rectX;
offsetZ = -rectZ;
} else {
offsetX = rectZ;
offsetZ = -rectX;
}
Location location = new Location(
center.getWorld(),
center.getX() + dx * (minRange + RANDOM.nextDouble() * (maxRange - minRange)),
center.getX() + offsetX,
center.getWorld().getMaxHeight(),
center.getZ() + dz * (minRange + RANDOM.nextDouble() * (maxRange - minRange)),
center.getZ() + offsetZ,
360 * RANDOM.nextFloat() - 180,
0
);