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82 lines
2.4 KiB
82 lines
2.4 KiB
import Node from '../core/Node.js';
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import Object3DNode from '../accessors/Object3DNode.js';
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import PositionNode from '../accessors/PositionNode.js';
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import ColorNode from '../inputs/ColorNode.js';
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import FloatNode from '../inputs/FloatNode.js';
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import OperatorNode from '../math/OperatorNode.js';
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import MathNode from '../math/MathNode.js';
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import { NodeUpdateType } from '../core/constants.js';
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import { punctualLightIntensityToIrradianceFactor } from '../functions/BSDFs.js';
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import { Color } from 'three';
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class LightNode extends Node {
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constructor( light = null ) {
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super( 'vec3' );
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this.updateType = NodeUpdateType.Object;
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this.light = light;
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this.color = new ColorNode( new Color() );
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this.lightCutoffDistance = new FloatNode( 0 );
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this.lightDecayExponent = new FloatNode( 0 );
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this.lightPositionView = new Object3DNode( Object3DNode.VIEW_POSITION );
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this.positionView = new PositionNode( PositionNode.VIEW );
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this.lVector = new OperatorNode( '-', this.lightPositionView, this.positionView );
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this.lightDirection = new MathNode( MathNode.NORMALIZE, this.lVector );
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this.lightDistance = new MathNode( MathNode.LENGTH, this.lVector );
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this.lightIntensity = punctualLightIntensityToIrradianceFactor.call( {
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lightDistance: this.lightDistance,
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cutoffDistance: this.lightCutoffDistance,
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decayExponent: this.lightDecayExponent
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} );
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this.lightColor = new OperatorNode( '*', this.color, this.lightIntensity );
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}
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update( /* frame */ ) {
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this.color.value.copy( this.light.color ).multiplyScalar( this.light.intensity );
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this.lightCutoffDistance.value = this.light.distance;
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this.lightDecayExponent.value = this.light.decay;
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}
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generate( builder, output ) {
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this.lightPositionView.object3d = this.light;
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const directFunctionNode = builder.getContextParameter( 'RE_Direct' );
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const indirectDiffuseFunctionNode = builder.getContextParameter( 'RE_IndirectDiffuse' );
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const directFunctionCallNode = directFunctionNode.call( {
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lightDirection: this.lightDirection,
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lightColor: this.lightColor
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} );
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const indirectDiffuseFunctionCallNode = indirectDiffuseFunctionNode.call( {
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lightDirection: this.lightDirection,
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lightColor: this.lightColor
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} );
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builder.addFlowCode( directFunctionCallNode.build( builder ) );
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builder.addFlowCode( indirectDiffuseFunctionCallNode.build( builder ) );
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return this.color.build( builder, output );
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}
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}
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export default LightNode;
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