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Optimized byte and nibble array re-ordering

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This commit is contained in:
Dylan K. Taylor 2016-11-19 14:16:04 +00:00
parent 252afde06f
commit 0be8fa4157
1 changed files with 7 additions and 3 deletions
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10
src/pocketmine/level/format/generic/GenericChunk.php
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@ -709,8 +709,10 @@ class GenericChunk implements Chunk{
$result = str_repeat("\x00", 4096);
for($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){
$result{($x << 8) | ($z << 4) | $y} = $array{($y << 8) | ($z << 4) | $x};
$result{$xz | $y} = $array{($y << 8) | $zx};
}
}
}
@ -728,9 +730,11 @@ class GenericChunk implements Chunk{
$result = str_repeat("\x00", 2048);
for($x = 0; $x < 16; ++$x){
for($z = 0; $z < 16; ++$z){
$xz = (($x << 7) | ($z << 3));
$zx = (($z << 3) | ($x >> 1));
for($y = 0; $y < 16; ++$y){
$inputIndex = (($y << 7) | ($z << 3) | ($x >> 1));
$outputIndex = (($x << 7) | ($z << 3) | ($y >> 1));
$inputIndex = (($y << 7) | $zx);
$outputIndex = ($xz | ($y >> 1));
$current = ord($result{$outputIndex});
$byte = ord($array{$inputIndex});