@openhps/core/dist/esm/three/nodes/lighting/BasicLightMapNode.js

Open Hybrid Positioning System - Core component

import LightingNode from './LightingNode.js';
import { float } from '../tsl/TSLBase.js';

/**
 * A specific version of {@link IrradianceNode} that is only relevant
 * for {@link MeshBasicNodeMaterial}. Since the material is unlit, it
 * requires a special scaling factor for the light map.
 *
 * @augments LightingNode
 */
class BasicLightMapNode extends LightingNode {
  static get type() {
    return 'BasicLightMapNode';
  }

  /**
   * Constructs a new basic light map node.
   *
   * @param {?Node<vec3>} [lightMapNode=null] - The light map node.
   */
  constructor(lightMapNode = null) {
    super();

    /**
     * The light map node.
     *
     * @type {?Node<vec3>}
     */
    this.lightMapNode = lightMapNode;
  }
  setup(builder) {
    // irradianceLightMap property is used in the indirectDiffuse() method of BasicLightingModel

    const RECIPROCAL_PI = float(1 / Math.PI);
    builder.context.irradianceLightMap = this.lightMapNode.mul(RECIPROCAL_PI);
  }
}
export default BasicLightMapNode;