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DirectionalLightNode.js

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import AnalyticLightNode from './AnalyticLightNode.js';
import { lightTargetDirection } from '../accessors/Lights.js';

/**
 * Module for representing directional lights as nodes.
 *
 * @augments AnalyticLightNode
 */
class DirectionalLightNode extends AnalyticLightNode {

	static get type() {

		return 'DirectionalLightNode';

	}

	/**
	 * Constructs a new directional light node.
	 *
	 * @param {DirectionalLight?} [light=null] - The directional light source.
	 */
	constructor( light = null ) {

		super( light );

	}

	setup( builder ) {

		super.setup( builder );

		const lightingModel = builder.context.lightingModel;

		const lightColor = this.colorNode;
		const lightDirection = lightTargetDirection( this.light );
		const reflectedLight = builder.context.reflectedLight;

		lightingModel.direct( {
			lightDirection,
			lightColor,
			reflectedLight
		}, builder.stack, builder );

	}

}

export default DirectionalLightNode;