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<title>three.js webgl - layers</title>
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body {
background-color: #f0f0f0;
color: #444;
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a {
color: #08f;
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<body>
<div id="info">
<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - webgl layers
</div>
<!-- Import maps polyfill -->
<!-- Remove this when import maps will be widely supported -->
<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
<script type="importmap">
{
"imports": {
"three": "../build/three.module.js",
"three/addons/": "./jsm/"
}
}
</script>
<script type="module">
import * as THREE from 'three';
import Stats from 'three/addons/libs/stats.module.js';
import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
let container, stats;
let camera, scene, renderer;
let theta = 0;
const radius = 100;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 10000 );
camera.layers.enable( 0 ); // enabled by default
camera.layers.enable( 1 );
camera.layers.enable( 2 );
scene = new THREE.Scene();
scene.background = new THREE.Color( 0xf0f0f0 );
const light = new THREE.PointLight( 0xffffff, 1 );
light.layers.enable( 0 );
light.layers.enable( 1 );
light.layers.enable( 2 );
scene.add( camera );
camera.add( light );
const colors = [ 0xff0000, 0x00ff00, 0x0000ff ];
const geometry = new THREE.BoxGeometry( 20, 20, 20 );
for ( let i = 0; i < 300; i ++ ) {
const layer = ( i % 3 );
const object = new THREE.Mesh( geometry, new THREE.MeshLambertMaterial( { color: colors[ layer ] } ) );
object.position.x = Math.random() * 800 - 400;
object.position.y = Math.random() * 800 - 400;
object.position.z = Math.random() * 800 - 400;
object.rotation.x = Math.random() * 2 * Math.PI;
object.rotation.y = Math.random() * 2 * Math.PI;
object.rotation.z = Math.random() * 2 * Math.PI;
object.scale.x = Math.random() + 0.5;
object.scale.y = Math.random() + 0.5;
object.scale.z = Math.random() + 0.5;
object.layers.set( layer );
scene.add( object );
}
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );
stats = new Stats();
container.appendChild( stats.dom );
const layers = {
'toggle red': function () {
camera.layers.toggle( 0 );
},
'toggle green': function () {
camera.layers.toggle( 1 );
},
'toggle blue': function () {
camera.layers.toggle( 2 );
},
'enable all': function () {
camera.layers.enableAll();
},
'disable all': function () {
camera.layers.disableAll();
}
};
//
// Init gui
const gui = new GUI();
gui.add( layers, 'toggle red' );
gui.add( layers, 'toggle green' );
gui.add( layers, 'toggle blue' );
gui.add( layers, 'enable all' );
gui.add( layers, 'disable all' );
window.addEventListener( 'resize', onWindowResize );
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
//
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
theta += 0.1;
camera.position.x = radius * Math.sin( THREE.MathUtils.degToRad( theta ) );
camera.position.y = radius * Math.sin( THREE.MathUtils.degToRad( theta ) );
camera.position.z = radius * Math.cos( THREE.MathUtils.degToRad( theta ) );
camera.lookAt( scene.position );
renderer.render( scene, camera );
}
</script>
</body>
</html>