<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js WebGL 2 - Multisampled Renderbuffers</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<link type="text/css" rel="stylesheet" href="main.css">
<style>
body {
background-color: #fff;
color: #222;
}
a {
color: #08f;
}
#container {
position: absolute;
top: 70px;
width: 100%;
bottom: 0px;
}
</style>
</head>
<body>
<div id="info">
<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - Multisampled Renderbuffers<br />
Left: WebGLRenderTarget, Right: WebGLMultisampleRenderTarget.
</div>
<div id="container">
</div>
<!-- Import maps polyfill -->
<!-- Remove this when import maps will be widely supported -->
<script async src="https://unpkg.com/es-module-shims@1.8.0/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 { EffectComposer } from 'three/addons/postprocessing/EffectComposer.js';
import { RenderPass } from 'three/addons/postprocessing/RenderPass.js';
import { OutputPass } from 'three/addons/postprocessing/OutputPass.js';
import WebGL from 'three/addons/capabilities/WebGL.js';
import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
let camera, renderer, group, container;
let composer1, composer2;
const params = {
animate: true,
};
init();
function init() {
if ( WebGL.isWebGL2Available() === false ) {
document.body.appendChild( WebGL.getWebGL2ErrorMessage() );
return;
}
container = document.getElementById( 'container' );
camera = new THREE.PerspectiveCamera( 45, container.offsetWidth / container.offsetHeight, 10, 2000 );
camera.position.z = 500;
const scene = new THREE.Scene();
scene.background = new THREE.Color( 0xffffff );
scene.fog = new THREE.Fog( 0xcccccc, 100, 1500 );
//
const hemiLight = new THREE.HemisphereLight( 0xffffff, 0x222222, 5 );
hemiLight.position.set( 1, 1, 1 );
scene.add( hemiLight );
//
group = new THREE.Group();
const geometry = new THREE.SphereGeometry( 10, 64, 40 );
const material = new THREE.MeshLambertMaterial( {
color: 0xee0808,
polygonOffset: true,
polygonOffsetFactor: 1, // positive value pushes polygon further away
polygonOffsetUnits: 1
} );
const material2 = new THREE.MeshBasicMaterial( { color: 0xffffff, wireframe: true } );
for ( let i = 0; i < 50; i ++ ) {
const mesh = new THREE.Mesh( geometry, material );
mesh.position.x = Math.random() * 600 - 300;
mesh.position.y = Math.random() * 600 - 300;
mesh.position.z = Math.random() * 600 - 300;
mesh.rotation.x = Math.random();
mesh.rotation.z = Math.random();
mesh.scale.setScalar( Math.random() * 5 + 5 );
group.add( mesh );
const mesh2 = new THREE.Mesh( geometry, material2 );
mesh2.position.copy( mesh.position );
mesh2.rotation.copy( mesh.rotation );
mesh2.scale.copy( mesh.scale );
group.add( mesh2 );
}
scene.add( group );
//
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( container.offsetWidth, container.offsetHeight );
renderer.autoClear = false;
container.appendChild( renderer.domElement );
//
const size = renderer.getDrawingBufferSize( new THREE.Vector2() );
const renderTarget = new THREE.WebGLRenderTarget( size.width, size.height, { samples: 4 } );
const renderPass = new RenderPass( scene, camera );
const outputPass = new OutputPass();
//
composer1 = new EffectComposer( renderer );
composer1.addPass( renderPass );
composer1.addPass( outputPass );
//
composer2 = new EffectComposer( renderer, renderTarget );
composer2.addPass( renderPass );
composer2.addPass( outputPass );
//
const gui = new GUI();
gui.add( params, 'animate' );
//
window.addEventListener( 'resize', onWindowResize );
animate();
}
function onWindowResize() {
camera.aspect = container.offsetWidth / container.offsetHeight;
camera.updateProjectionMatrix();
renderer.setSize( container.offsetWidth, container.offsetHeight );
composer1.setSize( container.offsetWidth, container.offsetHeight );
composer2.setSize( container.offsetWidth, container.offsetHeight );
}
function animate() {
requestAnimationFrame( animate );
const halfWidth = container.offsetWidth / 2;
if ( params.animate ) {
group.rotation.y += 0.002;
}
renderer.setScissorTest( true );
renderer.setScissor( 0, 0, halfWidth - 1, container.offsetHeight );
composer1.render();
renderer.setScissor( halfWidth, 0, halfWidth, container.offsetHeight );
composer2.render();
renderer.setScissorTest( false );
}
</script>
</body>
</html>