scripts/three/lights.js

import {EventDispatcher, HemisphereLight, DirectionalLight, Vector3} from 'three';
import {EVENT_UPDATED} from '../core/events.js';

export class Lights extends EventDispatcher
{
	constructor(scene, floorplan)
	{
		super();		
		this.scene = scene;
		this.floorplan = floorplan;		
		this.tol = 1;
		this.height = 300; // TODO: share with Blueprint.Wall
		this.dirLight = null;
		this.updatedroomsevent = () => {this.updateShadowCamera();};
		this.init();
	}

	getDirLight() 
	{
		return this.dirLight;
	}

	init() 
	{
		var light = new HemisphereLight(0xffffff, 0x888888, 1.1);
		light.position.set(0, this.height, 0);
		this.scene.add(light);

		this.dirLight = new DirectionalLight(0xffffff, 0.5);
		this.dirLight.color.setHSL(1, 1, 0.1);

		this.dirLight.castShadow = true;

		this.dirLight.shadow.mapSize.width = 1024;
		this.dirLight.shadow.mapSize.height = 1024;

		this.dirLight.shadow.camera.far = this.height + this.tol;
		this.dirLight.shadow.bias = -0.0001;
		this.dirLight.shadowDarkness = 0.2;
		this.dirLight.visible = true;
		this.dirLight.shadowCameraVisible = false;

		this.scene.add(this.dirLight);
		this.scene.add(this.dirLight.target);

//		this.floorplan.fireOnUpdatedRooms(updateShadowCamera);
		this.floorplan.addEventListener(EVENT_UPDATED, this.updatedroomsevent);

	}

	updateShadowCamera() 
	{
		var size = this.floorplan.getSize();
		var d = (Math.max(size.z, size.x) + this.tol) / 2.0;
		var center = this.floorplan.getCenter();
		var pos = new Vector3(center.x, this.height, center.z);
		this.dirLight.position.copy(pos);
		this.dirLight.target.position.copy(center);
		//dirLight.updateMatrix();
		//dirLight.updateWorldMatrix()
		this.dirLight.shadow.camera.left = -d;
		this.dirLight.shadow.camera.right = d;
		this.dirLight.shadow.camera.top = d;
		this.dirLight.shadow.camera.bottom = -d;
		// this is necessary for updates
		if (this.dirLight.shadowCamera) 
		{
			this.dirLight.shadow.camera.left = this.dirLight.shadowCameraLeft;
			this.dirLight.shadow.camera.right = this.dirLight.shadowCameraRight;
			this.dirLight.shadow.camera.top = this.dirLight.shadowCameraTop;
			this.dirLight.shadow.camera.bottom = this.dirLight.shadowCameraBottom;
			this.dirLight.shadowCamera.updateProjectionMatrix();
		}
	}
}