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51 lines
1.2 KiB
51 lines
1.2 KiB
2 years ago
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import AnalyticLightNode from './AnalyticLightNode.js';
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import LightsNode from './LightsNode.js';
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import Object3DNode from '../accessors/Object3DNode.js';
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import { uniform, add, mul, dot, mix, normalize, normalView } from '../shadernode/ShaderNodeElements.js';
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import { Color, HemisphereLight } from 'three';
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class HemisphereLightNode extends AnalyticLightNode {
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constructor( light = null ) {
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super( light );
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this.lightPositionNode = new Object3DNode( Object3DNode.POSITION );
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this.lightDirectionNode = normalize( this.lightPositionNode );
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this.groundColorNode = uniform( new Color() );
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}
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update( frame ) {
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const { light } = this;
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super.update( frame );
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this.lightPositionNode.object3d = light;
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this.groundColorNode.value.copy( light.groundColor ).multiplyScalar( light.intensity );
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}
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generate( builder ) {
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const { colorNode, groundColorNode, lightDirectionNode } = this;
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const dotNL = dot( normalView, lightDirectionNode );
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const hemiDiffuseWeight = add( mul( 0.5, dotNL ), 0.5 );
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const irradiance = mix( groundColorNode, colorNode, hemiDiffuseWeight );
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builder.context.irradiance.add( irradiance );
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}
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}
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LightsNode.setReference( HemisphereLight, HemisphereLightNode );
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export default HemisphereLightNode;
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