three 基础库
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 

104 lines
2.3 KiB

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