three#WebGLRenderer TypeScript Examples

static createRender() {
    let renderer = new THREE.WebGLRenderer({antialias: true});
    renderer.setPixelRatio(window.devicePixelRatio);
    renderer.setSize(window.innerWidth, window.innerHeight);
    renderer.outputEncoding = THREE.sRGBEncoding;
    renderer.shadowMap.enabled = true;
    renderer.xr.enabled = true;
    renderer.xr.setReferenceSpaceType( 'local' );
    renderer.xr.addEventListener( 'sessionstart', function ( event ) {
      App.controls.enabled = false;
    } );

    renderer.xr.addEventListener( 'sessionend', function ( event ) {
      App.controls.enabled = true;
    } );

    App.renderer = renderer;

    App.container.appendChild(renderer.domElement);
  }

export function loadEnvMap(renderer: WebGLRenderer, scene: Scene) {
  const pmremGenerator = new PMREMGenerator(renderer);
  pmremGenerator.compileEquirectangularShader();

  new RGBELoader()
    .setDataType(UnsignedByteType)
    .load("quarry_01_1k.hdr", function (texture) {
      const envMap = pmremGenerator.fromEquirectangular(texture).texture;

      scene.background = envMap;
      scene.environment = envMap;

      texture.dispose();
      pmremGenerator.dispose();
    });
}

/**
	 * Ajust node configuration depending on the camera distance.
	 *
	 * Called everytime before render.
	 */
	public onBeforeRender: (renderer: WebGLRenderer, scene: Scene, camera: Camera, geometry: BufferGeometry, material: Material, group: Group)=> void = (renderer, scene, camera, geometry, material, group) => 
	{
		this.lod.updateLOD(this, camera, renderer, scene);
	};

public updateLOD(view: MapView, camera: Camera, renderer: WebGLRenderer, scene: Object3D): void
	{
		projection.multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse);
		frustum.setFromProjectionMatrix(projection);
		camera.getWorldPosition(pov);

		view.children[0].traverse((node: any) => 
		{
			node.getWorldPosition(position);
			let distance = pov.distanceTo(position);
			distance /= Math.pow(2, view.provider.maxZoom - node.level);

			const inFrustum = this.pointOnly ? frustum.containsPoint(position) : frustum.intersectsObject(node);

			if (distance < this.subdivideDistance && inFrustum) 
			{
				node.subdivide();
			}
			else if (distance > this.simplifyDistance && node.parentNode) 
			{
				node.parentNode.simplify();
			}
		});
	}

public updateLOD(view: MapView, camera: Camera, renderer: WebGLRenderer, scene: Object3D): void
	{
		camera.getWorldPosition(pov);

		view.children[0].traverse((node: any) =>
		{
			node.getWorldPosition(position);

			let distance = pov.distanceTo(position);
			distance /= Math.pow(2, view.provider.maxZoom - node.level);

			if (distance < this.subdivideDistance) 
			{
				node.subdivide();
			}
			else if (distance > this.simplifyDistance && node.parentNode) 
			{
				node.parentNode.simplify();
			}
		});
	}

function init(renderer: Renderer, parameters?: StageInitParameters) {
    _renderer = renderer;
    if (parameters) {
        if (parameters.defaultLayer != null)
            UILayer = parameters.defaultLayer;
        if (parameters.screenMode)
            _screenMode = parameters.screenMode;
    }

    _canvas = renderer.domElement;
    _camera = new OrthographicCamera(-1, 1, 1, -1, 0, 1000);
    _camera.layers.set(UILayer);

    _touchscreen = is_touch_enabled();
    if (renderer instanceof WebGLRenderer)
        _devicePixelRatio = renderer.getPixelRatio();

    _touches = [];
    for (let i = 0; i < 5; i++)
        _touches.push(new TouchInfo());
    if (!_touchscreen)
        _touches[0].touchId = 0;

    _touchCount = 0;
    _touchPos = new Vector2();

    if (_touchscreen) {
        document.addEventListener('touchstart', ev => handleTouch(ev, 0), { passive: false });
        document.addEventListener('touchend', ev => handleTouch(ev, 1), { passive: false });
        document.addEventListener('touchmove', ev => handleTouch(ev, 2), { passive: false });
        document.addEventListener('touchcancel', ev => handleTouch(ev, 3), { passive: false });
    }
    else {
        document.addEventListener('mousedown', ev => handleMouse(ev, 0), { passive: false });
        document.addEventListener('mouseup', ev => handleMouse(ev, 1), { passive: false });
        document.addEventListener('mousemove', ev => handleMouse(ev, 2), { passive: false });
    }
    document.addEventListener('wheel', ev => handleWheel(ev), { passive: false });

    window.addEventListener('resize', onWindowResize, false);

    onWindowResize();
}

static renderer: WebGLRenderer;

onBeforeRender: (renderer: WebGLRenderer, scene: Scene, camera: Camera, geometry: BufferGeometry, material: Material, group: Group) => void;

updateLOD(view: MapView, camera: Camera, renderer: WebGLRenderer, scene: Object3D): void;

updateLOD(view: MapView, camera: Camera, renderer: WebGLRenderer, scene: Object3D): void;

updateLOD(view: MapView, camera: Camera, renderer: WebGLRenderer, scene: Object3D): void;

public updateLOD(view: MapView, camera: Camera, renderer: WebGLRenderer, scene: Object3D): void
	{
		const intersects = [];

		for (let t = 0; t < this.subdivisionRays; t++) 
		{
			// Raycast from random point
			this.mouse.set(Math.random() * 2 - 1, Math.random() * 2 - 1);

			// Check intersection
			this.raycaster.setFromCamera(this.mouse, camera);
			this.raycaster.intersectObjects(view.children, true, intersects);
		}

		for (let i = 0; i < intersects.length; i++) 
		{
			const node = intersects[i].object;
			let distance = intersects[i].distance;

			if (this.powerDistance) 
			{
				distance = Math.pow(distance * 2, node.level);
			}

			if (this.scaleDistance) 
			{
				const matrix = node.matrixWorld.elements;
				const vector = new Vector3(matrix[0], matrix[1], matrix[2]);
				distance = vector.length() / distance;
			}

			if (distance > this.thresholdUp) 
			{
				node.subdivide();
				return;
			}
			else if (distance < this.thresholdDown) 
			{
				if (node.parentNode !== null) 
				{
					node.parentNode.simplify();
					return;
				}
			}
		}
	}

/**
 * Three.js helper
 */
export default function useThree(params: ThreeConfigInterface): ThreeInterface {
  // default config
  const config: ThreeConfigInterface = {
    antialias: true,
    alpha: false,
    autoClear: true,
    orbitCtrl: false,
    pointer: false,
    resize: false,
    width: 300,
    height: 150,
  }

  if (params) {
    Object.entries(params).forEach(([key, value]) => {
      config[key] = value
    })
  }

  // size
  const size: SizeInterface = {
    width: 1, height: 1,
    wWidth: 1, wHeight: 1,
    ratio: 1,
  }

  const beforeRenderCallbacks: {(): void}[] = []

  const intersectObjects: Object3D[] = []

  const renderer = createRenderer()

  // returned object
  const obj: ThreeInterface = {
    config,
    renderer,
    size,
    init,
    dispose,
    render,
    renderC,
    setSize,
    addIntersectObject, removeIntersectObject,
  }

  return obj

  /**
   * create WebGLRenderer
   */
  function createRenderer(): WebGLRenderer {
    const renderer = new WebGLRenderer({ canvas: config.canvas, antialias: config.antialias, alpha: config.alpha, ...config.params })
    renderer.autoClear = config.autoClear
    return renderer
  }

  /**
   * init three
   */
  function init() {
    if (!obj.scene) {
      console.error('Missing Scene')
      return false
    }

    if (!obj.camera) {
      console.error('Missing Camera')
      return false
    }

    if (config.resize) {
      onResize()
      window.addEventListener('resize', onResize)
    } else if (config.width && config.height) {
      setSize(config.width, config.height)
    }

    initPointer()

    if (config.orbitCtrl) {
      const cameraCtrl = new OrbitControls(obj.camera, obj.renderer.domElement)
      if (config.orbitCtrl instanceof Object) {
        Object.entries(config.orbitCtrl).forEach(([key, value]) => {
          // @ts-ignore
          cameraCtrl[key] = value
        })
      }
      onBeforeRender(() => { cameraCtrl.update() })
      obj.cameraCtrl = cameraCtrl
    }

    return true
  }

  /**
   * init pointer
   */
  function initPointer() {
    let pointerConf: PointerConfigInterface = {
      camera: obj.camera!,
      domElement: obj.renderer!.domElement,
      intersectObjects,
    }

    if (config.pointer && config.pointer instanceof Object) {
      pointerConf = { ...pointerConf, ...config.pointer }
    }

    const pointer = obj.pointer = usePointer(pointerConf)
    if (config.pointer || intersectObjects.length) {
      pointer.addListeners()
      if (pointerConf.intersectMode === 'frame') {
        onBeforeRender(pointer.intersect)
      }
    }
  }

  /**
   * add before render callback
   */
  function onBeforeRender(cb: {(): void}) {
    beforeRenderCallbacks.push(cb)
  }

  /**
   * default render
   */
  function render() {
    // if (obj.cameraCtrl) obj.cameraCtrl.update()
    beforeRenderCallbacks.forEach(c => c())
    obj.renderer!.render(obj.scene!, obj.camera!)
  }

  /**
   * composer render
   */
  function renderC() {
    // if (obj.cameraCtrl) obj.cameraCtrl.update()
    beforeRenderCallbacks.forEach(c => c())
    obj.composer!.render()
  }

  /**
   * add intersect object
   */
  function addIntersectObject(o: Object3D) {
    if (intersectObjects.indexOf(o) === -1) {
      intersectObjects.push(o)
    }
    // add listeners if needed
    if (obj.pointer && !obj.pointer.listeners) {
      obj.pointer.addListeners()
    }
  }

  /**
   * remove intersect object
   */
  function removeIntersectObject(o: Object3D) {
    const i = intersectObjects.indexOf(o)
    if (i !== -1) {
      intersectObjects.splice(i, 1)
    }
    // remove listeners if needed
    if (obj.pointer && !config.pointer && intersectObjects.length === 0) {
      obj.pointer.removeListeners()
    }
  }

  /**
   * remove listeners and dispose
   */
  function dispose() {
    // beforeRenderCallbacks = []
    window.removeEventListener('resize', onResize)
    if (obj.pointer) obj.pointer.removeListeners()
    if (obj.cameraCtrl) obj.cameraCtrl.dispose()
    if (obj.renderer) obj.renderer.dispose()
  }

  /**
   * resize listener
   */
  function onResize() {
    if (config.resize === 'window') {
      setSize(window.innerWidth, window.innerHeight)
    } else {
      const elt = obj.renderer!.domElement.parentNode as Element
      if (elt) setSize(elt.clientWidth, elt.clientHeight)
    }
    config.onResize?.(size)
  }

  /**
   * update renderer size and camera
   */
  function setSize(width: number, height: number) {
    size.width = width
    size.height = height
    size.ratio = width / height

    obj.renderer!.setSize(width, height, false)

    // already done in EffectComposer
    // if (obj.composer) {
    //   obj.composer.setSize(width, height)
    // }

    const camera = (<Camera>obj.camera!)
    if (camera.type === 'PerspectiveCamera') {
      const pCamera = (<PerspectiveCamera>camera)
      pCamera.aspect = size.ratio
      pCamera.updateProjectionMatrix()
    }

    if (camera.type === 'OrthographicCamera') {
      const oCamera = (<OrthographicCamera>camera)
      size.wWidth = oCamera.right - oCamera.left
      size.wHeight = oCamera.top - oCamera.bottom
    } else {
      const wsize = getCameraSize()
      size.wWidth = wsize[0]
      size.wHeight = wsize[1]
    }
  }

  /**
   * calculate camera visible area size
   */
  function getCameraSize() {
    const camera = (<PerspectiveCamera>obj.camera!)
    const vFOV = (camera.fov * Math.PI) / 180
    const h = 2 * Math.tan(vFOV / 2) * Math.abs(camera.position.z)
    const w = h * camera.aspect
    return [w, h]
  }
}