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Improved Simplex 2D noise

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Shoghi Cervantes 2014-12-28 03:51:08 +01:00
parent d800a21bd4
commit 2cec0d9f36
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GPG Key ID: 78464DB0A7837F89
2 changed files with 14 additions and 19 deletions
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2
src/pocketmine/level/generator/Normal.php
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@ -49,7 +49,9 @@ class Normal extends Generator{
private $random; private $random;
private $worldHeight = 65; private $worldHeight = 65;
private $waterHeight = 63; private $waterHeight = 63;
/** @var Simplex */
private $noiseHills; private $noiseHills;
/** @var Simplex */
private $noiseBase; private $noiseBase;
public function __construct(array $options = []){ public function __construct(array $options = []){

31
src/pocketmine/level/generator/noise/Simplex.php
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@ -271,34 +271,27 @@ class Simplex extends Perlin{
$gi1 = $this->perm[$ii + $i1 + $this->perm[$jj + $j1]] % 12; $gi1 = $this->perm[$ii + $i1 + $this->perm[$jj + $j1]] % 12;
$gi2 = $this->perm[$ii + 1 + $this->perm[$jj + 1]] % 12; $gi2 = $this->perm[$ii + 1 + $this->perm[$jj + 1]] % 12;
$n = 0;
// Calculate the contribution from the three corners // Calculate the contribution from the three corners
$t0 = 0.5 - $x0 ** 2 - $y0 ** 2; $t = 0.5 - $x0 ** 2 - $y0 ** 2;
if($t0 < 0){ if($t > 0){
$n0 = 0.0; $n += $t ** 4 * self::dot2D(self::$grad3[$gi0], $x0, $y0); // (x,y) of grad3 used for 2D gradient
}else{
$t0 **= 2;
$n0 = $t0 ** 2 * self::dot2D(self::$grad3[$gi0], $x0, $y0); // (x,y) of grad3 used for 2D gradient
} }
$t1 = 0.5 - $x1 ** 2 - $y1 ** 2; $t = 0.5 - $x1 ** 2 - $y1 ** 2;
if($t1 < 0){ if($t > 0){
$n1 = 0.0; $n += $t ** 4 * self::dot2D(self::$grad3[$gi1], $x1, $y1);
}else{
$t1 **= 2;
$n1 = $t1 ** 2 * self::dot2D(self::$grad3[$gi1], $x1, $y1);
} }
$t2 = 0.5 - $x2 ** 2 - $y2 ** 2; $t = 0.5 - $x2 ** 2 - $y2 ** 2;
if($t2 < 0){ if($t > 0){
$n2 = 0.0; $n += $t ** 4 * self::dot2D(self::$grad3[$gi2], $x2, $y2);
}else{
$t2 **= 2;
$n2 = $t2 ** 2 * self::dot2D(self::$grad3[$gi2], $x2, $y2);
} }
// Add contributions from each corner to get the noise value. // Add contributions from each corner to get the noise value.
// The result is scaled to return values in the interval [-1,1]. // The result is scaled to return values in the interval [-1,1].
return 70.0 * ($n0 + $n1 + $n2); return 70.0 * $n;
} }
/** /**