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ImprovedNoise: Use MathUtils.lerp #30905

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Merged
Mugen87 merged 1 commit into from
Apr 11, 2025
Merged

ImprovedNoise: Use MathUtils.lerp #30905

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31 changes: 17 additions & 14 deletions examples/jsm/math/ImprovedNoise.js
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Original file line number Diff line number Diff line change
@@ -1,3 +1,7 @@
import { MathUtils } from 'three';

const { lerp } = MathUtils;

const _p = [ 151, 160, 137, 91, 90, 15, 131, 13, 201, 95, 96, 53, 194, 233, 7, 225, 140, 36, 103, 30, 69, 142, 8, 99, 37, 240, 21, 10,
23, 190, 6, 148, 247, 120, 234, 75, 0, 26, 197, 62, 94, 252, 219, 203, 117, 35, 11, 32, 57, 177, 33, 88, 237, 149, 56, 87,
174, 20, 125, 136, 171, 168, 68, 175, 74, 165, 71, 134, 139, 48, 27, 166, 77, 146, 158, 231, 83, 111, 229, 122, 60, 211,
Expand All @@ -21,12 +25,6 @@ function fade( t ) {

}

function lerp( t, a, b ) {

return a + t * ( b - a );

}

function grad( hash, x, y, z ) {

const h = hash & 15;
Expand Down Expand Up @@ -69,14 +67,19 @@ class ImprovedNoise {

const A = _p[ X ] + Y, AA = _p[ A ] + Z, AB = _p[ A + 1 ] + Z, B = _p[ X + 1 ] + Y, BA = _p[ B ] + Z, BB = _p[ B + 1 ] + Z;

return lerp( w, lerp( v, lerp( u, grad( _p[ AA ], x, y, z ),
grad( _p[ BA ], xMinus1, y, z ) ),
lerp( u, grad( _p[ AB ], x, yMinus1, z ),
grad( _p[ BB ], xMinus1, yMinus1, z ) ) ),
lerp( v, lerp( u, grad( _p[ AA + 1 ], x, y, zMinus1 ),
grad( _p[ BA + 1 ], xMinus1, y, zMinus1 ) ),
lerp( u, grad( _p[ AB + 1 ], x, yMinus1, zMinus1 ),
grad( _p[ BB + 1 ], xMinus1, yMinus1, zMinus1 ) ) ) );
return lerp(
lerp(
lerp( grad( _p[ AA ], x, y, z ), grad( _p[ BA ], xMinus1, y, z ), u ),
lerp( grad( _p[ AB ], x, yMinus1, z ), grad( _p[ BB ], xMinus1, yMinus1, z ), u ),
v
),
lerp(
lerp( grad( _p[ AA + 1 ], x, y, zMinus1 ), grad( _p[ BA + 1 ], xMinus1, y, zMinus1 ), u ),
lerp( grad( _p[ AB + 1 ], x, yMinus1, zMinus1 ), grad( _p[ BB + 1 ], xMinus1, yMinus1, zMinus1 ), u ),
v
),
w
);

}

Expand Down