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Optimized byte re-ordering

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This commit is contained in:
Dylan K. Taylor 2016-11-29 11:48:01 +00:00
parent d70be232d8
commit dd01407dd4
1 changed files with 6 additions and 5 deletions
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11
src/pocketmine/level/format/generic/GenericChunk.php
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@ -691,12 +691,13 @@ class GenericChunk implements Chunk{
*/
public static final function reorderByteArray(string $array) : string{
$result = str_repeat("\x00", 4096);
$i = 0;
for($x = 0; $x < 16; ++$x){
for($z = 0; $z < 16; ++$z){
$xz = (($x << 8) | ($z << 4));
$zx = (($z << 4) | $x);
for($y = 0; $y < 16; ++$y){
$result{$xz | $y} = $array{($y << 8) | $zx};
for($z = 0; $z < 256; $z += 16){
$zx = ($z + $x);
for($y = 0; $y < 4096; $y += 256){
$result{$i} = $array{$y + $zx};
++$i;
}
}
}