30 if(count($heights) !== 256){
31 throw new \InvalidArgumentException(
"Expected exactly 256 heightmap values");
36 public function getHeights() : array{ return $this->heights; }
38 public function getHeight(
int $x,
int $z) : int{
39 return $this->heights[(($z & 0xf) << 4) | ($x & 0xf)];
42 public static function read(ByteBufferReader $in) : self{
44 for($i = 0; $i < 256; ++$i){
45 $heights[] = Byte::readSigned($in);
47 return new self($heights);
50 public function write(ByteBufferWriter $out) : void{
51 for($i = 0; $i < 256; ++$i){
52 Byte::writeSigned($out, $this->heights[$i]);
56 public static function allTooLow() : self{
57 return new self(array_fill(0, 256, -1));
60 public static function allTooHigh() : self{
61 return new self(array_fill(0, 256, 16));
64 public function isAllTooLow() : bool{
65 foreach($this->heights as $height){
73 public function isAllTooHigh() : bool{
74 foreach($this->heights as $height){