/
webgl_materials_video.html
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webgl_materials_video.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - materials - video</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="overlay">
<button id="startButton">Play</button>
</div>
<div id="container"></div>
<div id="info">
<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - webgl video demo<br/>
playing <a href="http://durian.blender.org/" target="_blank" rel="noopener">sintel</a> trailer
</div>
<video id="video" loop crossOrigin="anonymous" playsinline style="display:none">
<source src="textures/sintel.ogv" type='video/ogg; codecs="theora, vorbis"'>
<source src="textures/sintel.mp4" type='video/mp4; codecs="avc1.42E01E, mp4a.40.2"'>
</video>
<script type="module">
import * as THREE from '../build/three.module.js';
import { EffectComposer } from './jsm/postprocessing/EffectComposer.js';
import { RenderPass } from './jsm/postprocessing/RenderPass.js';
import { ShaderPass } from './jsm/postprocessing/ShaderPass.js';
import { BloomPass } from './jsm/postprocessing/BloomPass.js';
import { CopyShader } from './jsm/shaders/CopyShader.js';
let container;
let camera, scene, renderer;
let video, texture, material, mesh;
let composer;
let mouseX = 0;
let mouseY = 0;
let windowHalfX = window.innerWidth / 2;
let windowHalfY = window.innerHeight / 2;
let cube_count;
const meshes = [],
materials = [],
xgrid = 20,
ygrid = 10;
const startButton = document.getElementById( 'startButton' );
startButton.addEventListener( 'click', function () {
init();
animate();
} );
function init() {
const overlay = document.getElementById( 'overlay' );
overlay.remove();
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 10000 );
camera.position.z = 500;
scene = new THREE.Scene();
const light = new THREE.DirectionalLight( 0xffffff );
light.position.set( 0.5, 1, 1 ).normalize();
scene.add( light );
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );
video = document.getElementById( 'video' );
video.play();
video.addEventListener( 'play', function () {
this.currentTime = 3;
} );
texture = new THREE.VideoTexture( video );
//
let i, j, ox, oy, geometry;
const ux = 1 / xgrid;
const uy = 1 / ygrid;
const xsize = 480 / xgrid;
const ysize = 204 / ygrid;
const parameters = { color: 0xffffff, map: texture };
cube_count = 0;
for ( i = 0; i < xgrid; i ++ ) {
for ( j = 0; j < ygrid; j ++ ) {
ox = i;
oy = j;
geometry = new THREE.BoxGeometry( xsize, ysize, xsize );
change_uvs( geometry, ux, uy, ox, oy );
materials[ cube_count ] = new THREE.MeshLambertMaterial( parameters );
material = materials[ cube_count ];
material.hue = i / xgrid;
material.saturation = 1 - j / ygrid;
material.color.setHSL( material.hue, material.saturation, 0.5 );
mesh = new THREE.Mesh( geometry, material );
mesh.position.x = ( i - xgrid / 2 ) * xsize;
mesh.position.y = ( j - ygrid / 2 ) * ysize;
mesh.position.z = 0;
mesh.scale.x = mesh.scale.y = mesh.scale.z = 1;
scene.add( mesh );
mesh.dx = 0.001 * ( 0.5 - Math.random() );
mesh.dy = 0.001 * ( 0.5 - Math.random() );
meshes[ cube_count ] = mesh;
cube_count += 1;
}
}
renderer.autoClear = false;
document.addEventListener( 'mousemove', onDocumentMouseMove );
// postprocessing
const renderModel = new RenderPass( scene, camera );
const effectBloom = new BloomPass( 1.3 );
const effectCopy = new ShaderPass( CopyShader );
composer = new EffectComposer( renderer );
composer.addPass( renderModel );
composer.addPass( effectBloom );
composer.addPass( effectCopy );
//
window.addEventListener( 'resize', onWindowResize );
}
function onWindowResize() {
windowHalfX = window.innerWidth / 2;
windowHalfY = window.innerHeight / 2;
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
composer.setSize( window.innerWidth, window.innerHeight );
}
function change_uvs( geometry, unitx, unity, offsetx, offsety ) {
const uvs = geometry.attributes.uv.array;
for ( let i = 0; i < uvs.length; i += 2 ) {
uvs[ i ] = ( uvs[ i ] + offsetx ) * unitx;
uvs[ i + 1 ] = ( uvs[ i + 1 ] + offsety ) * unity;
}
}
function onDocumentMouseMove( event ) {
mouseX = ( event.clientX - windowHalfX );
mouseY = ( event.clientY - windowHalfY ) * 0.3;
}
//
function animate() {
requestAnimationFrame( animate );
render();
}
let h, counter = 1;
function render() {
const time = Date.now() * 0.00005;
camera.position.x += ( mouseX - camera.position.x ) * 0.05;
camera.position.y += ( - mouseY - camera.position.y ) * 0.05;
camera.lookAt( scene.position );
for ( let i = 0; i < cube_count; i ++ ) {
material = materials[ i ];
h = ( 360 * ( material.hue + time ) % 360 ) / 360;
material.color.setHSL( h, material.saturation, 0.5 );
}
if ( counter % 1000 > 200 ) {
for ( let i = 0; i < cube_count; i ++ ) {
mesh = meshes[ i ];
mesh.rotation.x += 10 * mesh.dx;
mesh.rotation.y += 10 * mesh.dy;
mesh.position.x -= 150 * mesh.dx;
mesh.position.y += 150 * mesh.dy;
mesh.position.z += 300 * mesh.dx;
}
}
if ( counter % 1000 === 0 ) {
for ( let i = 0; i < cube_count; i ++ ) {
mesh = meshes[ i ];
mesh.dx *= - 1;
mesh.dy *= - 1;
}
}
counter ++;
renderer.clear();
composer.render();
}
</script>
</body>
</html>