85 lines
2.1 KiB
JavaScript
85 lines
2.1 KiB
JavaScript
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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 UniformNode from '../core/UniformNode.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 { getDistanceAttenuation } 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._colorNode = new UniformNode( new Color() );
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this._lightCutoffDistanceNode = new UniformNode( 0 );
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this._lightDecayExponentNode = new UniformNode( 0 );
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}
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getHash( /*builder*/ ) {
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return this.light.uuid;
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}
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update( /* frame */ ) {
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this._colorNode.value.copy( this.light.color ).multiplyScalar( this.light.intensity );
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this._lightCutoffDistanceNode.value = this.light.distance;
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this._lightDecayExponentNode.value = this.light.decay;
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}
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generate( builder ) {
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const lightPositionView = new Object3DNode( Object3DNode.VIEW_POSITION );
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const positionView = new PositionNode( PositionNode.VIEW );
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const lVector = new OperatorNode( '-', lightPositionView, positionView );
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const lightDirection = new MathNode( MathNode.NORMALIZE, lVector );
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const lightDistance = new MathNode( MathNode.LENGTH, lVector );
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const lightAttenuation = getDistanceAttenuation( {
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lightDistance,
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cutoffDistance: this._lightCutoffDistanceNode,
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decayExponent: this._lightDecayExponentNode
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} );
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const lightColor = new OperatorNode( '*', this._colorNode, lightAttenuation );
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lightPositionView.object3d = this.light;
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const lightingModelFunction = builder.context.lightingModel;
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if ( lightingModelFunction !== undefined ) {
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const directDiffuse = builder.context.directDiffuse;
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const directSpecular = builder.context.directSpecular;
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lightingModelFunction( {
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lightDirection,
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lightColor,
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directDiffuse,
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directSpecular
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}, builder );
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}
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}
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}
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export default LightNode;
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