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Blazingly fast Minecraft world manipulation for artists, builders and everyone else.
/*
* WorldEdit, a Minecraft world manipulation toolkit
* Copyright (C) sk89q
* Copyright (C) WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
package com.sk89q.worldedit.math;
public final class BitMath {
public static int mask(int bits) {
return ~(~0 << bits);
}
public static int unpackX(long packed) {
return extractSigned(packed, 0, 26);
}
public static int unpackZ(long packed) {
return extractSigned(packed, 26, 26);
}
public static int unpackY(long packed) {
return extractSigned(packed, 26 + 26, 12);
}
public static int extractSigned(long i, int shift, int bits) {
return fixSign((int) (i >> shift) & mask(bits), bits);
}
public static int fixSign(int i, int bits) {
// Using https://stackoverflow.com/a/29266331/436524
return i << (32 - bits) >> (32 - bits);
}
private BitMath() {
}
}