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105 lines
2.3 KiB
105 lines
2.3 KiB
2 years ago
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import { TempNode } from '../core/TempNode.js';
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import { FunctionNode } from '../core/FunctionNode.js';
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import { FunctionCallNode } from '../core/FunctionCallNode.js';
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import { IntNode } from '../inputs/IntNode.js';
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import { FloatNode } from '../inputs/FloatNode.js';
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import { PositionNode } from '../accessors/PositionNode.js';
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import { Noise3DNode } from './Noise3DNode.js';
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const FRACTAL3D_SRC = `
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float fractal3d( vec3 p, float amplitude, int octaves, float lacunarity, float diminish ) {
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float result = 0.0;
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for (int i = 0; i < octaves; ++i) {
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result += noise3d(p, amplitude, 0.0);
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amplitude *= diminish;
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p *= lacunarity;
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}
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return result;
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}
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`.trim();
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/** Fractional Brownian motion. */
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class Fractal3DNode extends TempNode {
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constructor( position = new PositionNode(), amplitude = new FloatNode( 1.0 ), octaves = 3.0, lacunarity = 2.0, diminish = 0.5 ) {
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super( 'f' );
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this.position = position;
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this.amplitude = amplitude;
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this.octaves = new IntNode( octaves ).setReadonly( true );
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this.lacunarity = new FloatNode( lacunarity ).setReadonly( true );
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this.diminish = new FloatNode( diminish ).setReadonly( true );
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}
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generate( builder, output ) {
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const fractal3d = new FunctionCallNode( Fractal3DNode.Nodes.fractal3d, [
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this.position,
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this.amplitude,
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this.octaves,
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this.lacunarity,
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this.diminish,
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] );
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return builder.format( fractal3d.generate( builder, output ), this.getType( builder ), output );
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}
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copy( source ) {
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super.copy( source );
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this.position = source.position;
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this.amplitude = source.amplitude;
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this.octaves = source.octaves;
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this.lacunarity = source.lacunarity;
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this.diminish = source.diminish;
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}
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toJSON( meta ) {
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let data = this.getJSONNode( meta );
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if ( ! data ) {
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data = this.createJSONNode( meta );
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data.position = this.position.toJSON( meta ).uuid;
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data.amplitude = this.amplitude.toJSON( meta ).uuid;
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data.octaves = this.octaves.toJSON( meta ).uuid;
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data.lacunarity = this.lacunarity.toJSON( meta ).uuid;
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data.diminish = this.diminish.toJSON( meta ).uuid;
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}
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return data;
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}
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}
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Fractal3DNode.prototype.nodeType = 'Fractal3D';
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Fractal3DNode.Nodes = ( function () {
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const fractal3d = new FunctionNode( FRACTAL3D_SRC );
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fractal3d.includes = [ Noise3DNode.Nodes.noise3d ];
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return { fractal3d };
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} )();
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export { Fractal3DNode };
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