three.js/examples/js/nodes/procedural/NoiseNode.js

/**
 * @author sunag / http://www.sunag.com.br/
 */

import { TempNode } from '../core/TempNode.js';
import { FunctionNode } from '../core/FunctionNode.js';
import { UVNode } from '../accessors/UVNode.js';

function NoiseNode( coord ) {

	TempNode.call( this, 'fv1' );

	this.coord = coord || new UVNode();

};

NoiseNode.prototype = Object.create( TempNode.prototype );
NoiseNode.prototype.constructor = NoiseNode;
NoiseNode.prototype.nodeType = "Noise";

NoiseNode.Nodes = (function() {
	
	var snoise = new FunctionNode( [
		"float snoise(vec2 co) {",
		
		"	return fract( sin( dot( co.xy, vec2( 12.9898, 78.233 ) ) ) * 43758.5453 );",
		
		"}"
	].join( "\n" ) );

	return {
		snoise: snoise
	};
	
})();

NoiseNode.prototype.generate = function ( builder, output ) {

	var snoise = builder.include( NoiseNode.Nodes.snoise );

	return builder.format( snoise + '( ' + this.coord.build( builder, 'v2' ) + ' )', this.getType( builder ), output );

};

NoiseNode.prototype.copy = function ( source ) {
			
	TempNode.prototype.copy.call( this, source );
	
	this.coord = source.coord;
	
};

NoiseNode.prototype.toJSON = function ( meta ) {

	var data = this.getJSONNode( meta );

	if ( ! data ) {

		data = this.createJSONNode( meta );

		data.coord = this.coord.toJSON( meta ).uuid;

	}

	return data;

};

export { NoiseNode };