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webgl_multiple_views.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - multiple views</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">
</head>
<body>
<div id="container"></div>
<div id="info"><a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - multiple views - webgl</div>
<!-- Import maps polyfill -->
<!-- Remove this when import maps will be widely supported -->
<script async src="https://unpkg.com/[email protected]/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';
let stats;
let scene, renderer;
let mouseX = 0, mouseY = 0;
let windowWidth, windowHeight;
const views = [
{
left: 0,
bottom: 0,
width: 0.5,
height: 1.0,
background: new THREE.Color( 0.5, 0.5, 0.7 ),
eye: [ 0, 300, 1800 ],
up: [ 0, 1, 0 ],
fov: 30,
updateCamera: function ( camera, scene, mouseX ) {
camera.position.x += mouseX * 0.05;
camera.position.x = Math.max( Math.min( camera.position.x, 2000 ), - 2000 );
camera.lookAt( scene.position );
}
},
{
left: 0.5,
bottom: 0,
width: 0.5,
height: 0.5,
background: new THREE.Color( 0.7, 0.5, 0.5 ),
eye: [ 0, 1800, 0 ],
up: [ 0, 0, 1 ],
fov: 45,
updateCamera: function ( camera, scene, mouseX ) {
camera.position.x -= mouseX * 0.05;
camera.position.x = Math.max( Math.min( camera.position.x, 2000 ), - 2000 );
camera.lookAt( camera.position.clone().setY( 0 ) );
}
},
{
left: 0.5,
bottom: 0.5,
width: 0.5,
height: 0.5,
background: new THREE.Color( 0.5, 0.7, 0.7 ),
eye: [ 1400, 800, 1400 ],
up: [ 0, 1, 0 ],
fov: 60,
updateCamera: function ( camera, scene, mouseX ) {
camera.position.y -= mouseX * 0.05;
camera.position.y = Math.max( Math.min( camera.position.y, 1600 ), - 1600 );
camera.lookAt( scene.position );
}
}
];
init();
animate();
function init() {
const container = document.getElementById( 'container' );
for ( let ii = 0; ii < views.length; ++ ii ) {
const view = views[ ii ];
const camera = new THREE.PerspectiveCamera( view.fov, window.innerWidth / window.innerHeight, 1, 10000 );
camera.position.fromArray( view.eye );
camera.up.fromArray( view.up );
view.camera = camera;
}
scene = new THREE.Scene();
const light = new THREE.DirectionalLight( 0xffffff );
light.position.set( 0, 0, 1 );
scene.add( light );
// shadow
const canvas = document.createElement( 'canvas' );
canvas.width = 128;
canvas.height = 128;
const context = canvas.getContext( '2d' );
const gradient = context.createRadialGradient( canvas.width / 2, canvas.height / 2, 0, canvas.width / 2, canvas.height / 2, canvas.width / 2 );
gradient.addColorStop( 0.1, 'rgba(0,0,0,0.15)' );
gradient.addColorStop( 1, 'rgba(0,0,0,0)' );
context.fillStyle = gradient;
context.fillRect( 0, 0, canvas.width, canvas.height );
const shadowTexture = new THREE.CanvasTexture( canvas );
const shadowMaterial = new THREE.MeshBasicMaterial( { map: shadowTexture, transparent: true } );
const shadowGeo = new THREE.PlaneGeometry( 300, 300, 1, 1 );
let shadowMesh;
shadowMesh = new THREE.Mesh( shadowGeo, shadowMaterial );
shadowMesh.position.y = - 250;
shadowMesh.rotation.x = - Math.PI / 2;
scene.add( shadowMesh );
shadowMesh = new THREE.Mesh( shadowGeo, shadowMaterial );
shadowMesh.position.x = - 400;
shadowMesh.position.y = - 250;
shadowMesh.rotation.x = - Math.PI / 2;
scene.add( shadowMesh );
shadowMesh = new THREE.Mesh( shadowGeo, shadowMaterial );
shadowMesh.position.x = 400;
shadowMesh.position.y = - 250;
shadowMesh.rotation.x = - Math.PI / 2;
scene.add( shadowMesh );
const radius = 200;
const geometry1 = new THREE.IcosahedronGeometry( radius, 1 );
const count = geometry1.attributes.position.count;
geometry1.setAttribute( 'color', new THREE.BufferAttribute( new Float32Array( count * 3 ), 3 ) );
const geometry2 = geometry1.clone();
const geometry3 = geometry1.clone();
const color = new THREE.Color();
const positions1 = geometry1.attributes.position;
const positions2 = geometry2.attributes.position;
const positions3 = geometry3.attributes.position;
const colors1 = geometry1.attributes.color;
const colors2 = geometry2.attributes.color;
const colors3 = geometry3.attributes.color;
for ( let i = 0; i < count; i ++ ) {
color.setHSL( ( positions1.getY( i ) / radius + 1 ) / 2, 1.0, 0.5 );
colors1.setXYZ( i, color.r, color.g, color.b );
color.setHSL( 0, ( positions2.getY( i ) / radius + 1 ) / 2, 0.5 );
colors2.setXYZ( i, color.r, color.g, color.b );
color.setRGB( 1, 0.8 - ( positions3.getY( i ) / radius + 1 ) / 2, 0 );
colors3.setXYZ( i, color.r, color.g, color.b );
}
const material = new THREE.MeshPhongMaterial( {
color: 0xffffff,
flatShading: true,
vertexColors: true,
shininess: 0
} );
const wireframeMaterial = new THREE.MeshBasicMaterial( { color: 0x000000, wireframe: true, transparent: true } );
let mesh = new THREE.Mesh( geometry1, material );
let wireframe = new THREE.Mesh( geometry1, wireframeMaterial );
mesh.add( wireframe );
mesh.position.x = - 400;
mesh.rotation.x = - 1.87;
scene.add( mesh );
mesh = new THREE.Mesh( geometry2, material );
wireframe = new THREE.Mesh( geometry2, wireframeMaterial );
mesh.add( wireframe );
mesh.position.x = 400;
scene.add( mesh );
mesh = new THREE.Mesh( geometry3, material );
wireframe = new THREE.Mesh( geometry3, wireframeMaterial );
mesh.add( wireframe );
scene.add( mesh );
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );
stats = new Stats();
container.appendChild( stats.dom );
document.addEventListener( 'mousemove', onDocumentMouseMove );
}
function onDocumentMouseMove( event ) {
mouseX = ( event.clientX - windowWidth / 2 );
mouseY = ( event.clientY - windowHeight / 2 );
}
function updateSize() {
if ( windowWidth != window.innerWidth || windowHeight != window.innerHeight ) {
windowWidth = window.innerWidth;
windowHeight = window.innerHeight;
renderer.setSize( windowWidth, windowHeight );
}
}
function animate() {
render();
stats.update();
requestAnimationFrame( animate );
}
function render() {
updateSize();
for ( let ii = 0; ii < views.length; ++ ii ) {
const view = views[ ii ];
const camera = view.camera;
view.updateCamera( camera, scene, mouseX, mouseY );
const left = Math.floor( windowWidth * view.left );
const bottom = Math.floor( windowHeight * view.bottom );
const width = Math.floor( windowWidth * view.width );
const height = Math.floor( windowHeight * view.height );
renderer.setViewport( left, bottom, width, height );
renderer.setScissor( left, bottom, width, height );
renderer.setScissorTest( true );
renderer.setClearColor( view.background );
camera.aspect = width / height;
camera.updateProjectionMatrix();
renderer.render( scene, camera );
}
}
</script>
</body>
</html>