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Level: some mitigations for #2675

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this reduces the performance impact by using smaller keys, which reduces the key distance for nearby blocks.
This commit is contained in:
Dylan K. Taylor 2019-01-25 13:17:33 +00:00
parent 62b6405371
commit 636cc1c199
1 changed files with 29 additions and 16 deletions
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45
src/pocketmine/level/Level.php
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@ -293,6 +293,19 @@ class Level implements ChunkManager, Metadatable{
return (($x & 0xFFFFFFF) << 36) | (($y & Level::Y_MASK) << 28) | ($z & 0xFFFFFFF);
}
/**
* Computes a small index relative to chunk base from the given coordinates.
*
* @param int $x
* @param int $y
* @param int $z
*
* @return int
*/
public static function chunkBlockHash(int $x, int $y, int $z) : int{
return ($y << 8) | (($z & 0xf) << 4) | ($x & 0xf);
}
public static function getBlockXYZ(int $hash, ?int &$x, ?int &$y, ?int &$z) : void{
$x = $hash >> 36;
$y = ($hash >> 28) & Level::Y_MASK; //it's always positive
@ -1423,14 +1436,14 @@ class Level implements ChunkManager, Metadatable{
*/
public function getBlockAt(int $x, int $y, int $z, bool $cached = true, bool $addToCache = true) : Block{
$fullState = 0;
$blockHash = null;
$relativeBlockHash = null;
$chunkHash = Level::chunkHash($x >> 4, $z >> 4);
if($this->isInWorld($x, $y, $z)){
$blockHash = Level::blockHash($x, $y, $z);
$relativeBlockHash = Level::chunkBlockHash($x, $y, $z);
if($cached and isset($this->blockCache[$chunkHash][$blockHash])){
return $this->blockCache[$chunkHash][$blockHash];
if($cached and isset($this->blockCache[$chunkHash][$relativeBlockHash])){
return $this->blockCache[$chunkHash][$relativeBlockHash];
}
$chunk = $this->chunks[$chunkHash] ?? null;
@ -1448,8 +1461,8 @@ class Level implements ChunkManager, Metadatable{
$block->z = $z;
$block->level = $this;
if($addToCache and $blockHash !== null){
$this->blockCache[$chunkHash][$blockHash] = $block;
if($addToCache and $relativeBlockHash !== null){
$this->blockCache[$chunkHash][$relativeBlockHash] = $block;
}
return $block;
@ -1607,19 +1620,19 @@ class Level implements ChunkManager, Metadatable{
$block->clearCaches();
$chunkHash = Level::chunkHash($pos->x >> 4, $pos->z >> 4);
$blockHash = Level::blockHash($pos->x, $pos->y, $pos->z);
$relativeBlockHash = Level::chunkBlockHash($pos->x, $pos->y, $pos->z);
unset($this->blockCache[$chunkHash][$blockHash]);
unset($this->blockCache[$chunkHash][$relativeBlockHash]);
if($direct){
$this->sendBlocks($this->getChunkPlayers($pos->x >> 4, $pos->z >> 4), [$block], UpdateBlockPacket::FLAG_ALL_PRIORITY);
unset($this->chunkCache[$chunkHash], $this->changedBlocks[$chunkHash][$blockHash]);
unset($this->chunkCache[$chunkHash], $this->changedBlocks[$chunkHash][$relativeBlockHash]);
}else{
if(!isset($this->changedBlocks[$chunkHash])){
$this->changedBlocks[$chunkHash] = [];
}
$this->changedBlocks[$chunkHash][$blockHash] = $block;
$this->changedBlocks[$chunkHash][$relativeBlockHash] = $block;
}
foreach($this->getChunkLoaders($pos->x >> 4, $pos->z >> 4) as $loader){
@ -2212,14 +2225,14 @@ class Level implements ChunkManager, Metadatable{
return;
}
$chunkHash = Level::chunkHash($x >> 4, $z >> 4);
$blockHash = Level::blockHash($x, $y, $z);
unset($this->blockCache[$chunkHash][$blockHash]);
$relativeBlockHash = Level::chunkBlockHash($x, $y, $z);
unset($this->blockCache[$chunkHash][$relativeBlockHash]);
$this->getChunk($x >> 4, $z >> 4, true)->setBlockId($x & 0x0f, $y, $z & 0x0f, $id & 0xff);
if(!isset($this->changedBlocks[$chunkHash])){
$this->changedBlocks[$chunkHash] = [];
}
$this->changedBlocks[$chunkHash][$blockHash] = $v = new Vector3($x, $y, $z);
$this->changedBlocks[$chunkHash][$relativeBlockHash] = $v = new Vector3($x, $y, $z);
foreach($this->getChunkLoaders($x >> 4, $z >> 4) as $loader){
$loader->onBlockChanged($v);
}
@ -2251,15 +2264,15 @@ class Level implements ChunkManager, Metadatable{
return;
}
$chunkHash = Level::chunkHash($x >> 4, $z >> 4);
$blockHash = Level::blockHash($x, $y, $z);
unset($this->blockCache[$chunkHash][$blockHash]);
$relativeBlockHash = Level::chunkBlockHash($x, $y, $z);
unset($this->blockCache[$chunkHash][$relativeBlockHash]);
$this->getChunk($x >> 4, $z >> 4, true)->setBlockData($x & 0x0f, $y, $z & 0x0f, $data & 0x0f);
if(!isset($this->changedBlocks[$chunkHash])){
$this->changedBlocks[$chunkHash] = [];
}
$this->changedBlocks[$chunkHash][$blockHash] = $v = new Vector3($x, $y, $z);
$this->changedBlocks[$chunkHash][$relativeBlockHash] = $v = new Vector3($x, $y, $z);
foreach($this->getChunkLoaders($x >> 4, $z >> 4) as $loader){
$loader->onBlockChanged($v);
}