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75 lines
1.3 KiB
75 lines
1.3 KiB
2 years ago
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import Node from '../core/Node.js';
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import TimerNode from './TimerNode.js';
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import { abs, fract, round, sin, add, sub, mul } from '../shadernode/ShaderNodeBaseElements.js';
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class OscNode extends Node {
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static SINE = 'sine';
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static SQUARE = 'square';
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static TRIANGLE = 'triangle';
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static SAWTOOTH = 'sawtooth';
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constructor( method = OscNode.SINE, timeNode = new TimerNode() ) {
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super();
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this.method = method;
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this.timeNode = timeNode;
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}
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getNodeType( builder ) {
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return this.timeNode.getNodeType( builder );
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}
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construct() {
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const method = this.method;
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const timeNode = this.timeNode;
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let outputNode = null;
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if ( method === OscNode.SINE ) {
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outputNode = add( mul( sin( mul( add( timeNode, .75 ), Math.PI * 2 ) ), .5 ), .5 );
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} else if ( method === OscNode.SQUARE ) {
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outputNode = round( fract( timeNode ) );
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} else if ( method === OscNode.TRIANGLE ) {
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outputNode = abs( sub( 1, mul( fract( add( timeNode, .5 ) ), 2 ) ) );
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} else if ( method === OscNode.SAWTOOTH ) {
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outputNode = fract( timeNode );
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}
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return outputNode;
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}
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serialize( data ) {
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super.serialize( data );
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data.method = this.method;
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}
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deserialize( data ) {
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super.deserialize( data );
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this.method = data.method;
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}
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}
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export default OscNode;
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