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72 lines
1.4 KiB
72 lines
1.4 KiB
6 months ago
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// https://github.com/cabbibo/glsl-tri-noise-3d
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import { loop } from '../utils/LoopNode.js';
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import { float, vec3, tslFn } from '../shadernode/ShaderNode.js';
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const tri = tslFn( ( [ x ] ) => {
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return x.fract().sub( .5 ).abs();
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} );
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const tri3 = tslFn( ( [ p ] ) => {
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return vec3( tri( p.z.add( tri( p.y.mul( 1. ) ) ) ), tri( p.z.add( tri( p.x.mul( 1. ) ) ) ), tri( p.y.add( tri( p.x.mul( 1. ) ) ) ) );
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} );
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const triNoise3D = tslFn( ( [ p_immutable, spd, time ] ) => {
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const p = vec3( p_immutable ).toVar();
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const z = float( 1.4 ).toVar();
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const rz = float( 0.0 ).toVar();
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const bp = vec3( p ).toVar();
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loop( { start: float( 0.0 ), end: float( 3.0 ), type: 'float', condition: '<=' }, () => {
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const dg = vec3( tri3( bp.mul( 2.0 ) ) ).toVar();
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p.addAssign( dg.add( time.mul( float( 0.1 ).mul( spd ) ) ) );
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bp.mulAssign( 1.8 );
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z.mulAssign( 1.5 );
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p.mulAssign( 1.2 );
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const t = float( tri( p.z.add( tri( p.x.add( tri( p.y ) ) ) ) ) ).toVar();
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rz.addAssign( t.div( z ) );
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bp.addAssign( 0.14 );
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} );
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return rz;
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} );
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// layouts
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tri.setLayout( {
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name: 'tri',
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type: 'float',
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inputs: [
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{ name: 'x', type: 'float' }
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]
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} );
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tri3.setLayout( {
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name: 'tri3',
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type: 'vec3',
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inputs: [
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{ name: 'p', type: 'vec3' }
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]
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} );
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triNoise3D.setLayout( {
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name: 'triNoise3D',
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type: 'float',
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inputs: [
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{ name: 'p', type: 'vec3' },
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{ name: 'spd', type: 'float' },
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{ name: 'time', type: 'float' }
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]
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} );
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export { tri, tri3, triNoise3D };
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