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webgl_ribbons.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - ribbons</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<style>
body {
background-color: #000000;
margin: 0px;
overflow: hidden;
font-family:Monospace;
font-size:13px;
text-align:center;
font-weight: bold;
text-align:center;
}
a {
color:#0078ff;
}
#info {
color:#fff;
position: absolute;
top: 0px; width: 100%;
padding: 5px;
z-index:100;
}
</style>
</head>
<body>
<script src="../build/three.min.js"></script>
<script src="js/shaders/ConvolutionShader.js"></script>
<script src="js/shaders/CopyShader.js"></script>
<script src="js/postprocessing/EffectComposer.js"></script>
<script src="js/postprocessing/MaskPass.js"></script>
<script src="js/postprocessing/RenderPass.js"></script>
<script src="js/postprocessing/ShaderPass.js"></script>
<script src="js/postprocessing/BloomPass.js"></script>
<script src="js/Detector.js"></script>
<script src="js/libs/stats.min.js"></script>
<div id="info">
<a href="http://threejs.org" target="_blank">three.js</a> - webgl ribbons example
</div>
<script>
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
var container, stats;
var camera, scene, renderer, ribbon, geometry, geometry2, materials = [], ribbons = [],
parameters, i, i2, h, color, x, y, z, z2, s, n, n2, nribbons, grid;
var mouseX = 0, mouseY = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
var postprocessing = { enabled : true };
var composer;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 3000 );
camera.position.z = 1200;
scene = new THREE.Scene();
scene.fog = new THREE.FogExp2( 0x000000, 0.0016 );
geometry = new THREE.Geometry();
geometry2 = new THREE.Geometry();
n = 1000;
n2 = 2 * n;
for ( i = -n; i < n; i++ ) {
i2 = i + n;
x = i * 1.175;
y = ( i2 % 2 ) * 5;
if ( i2 % 2 ) {
z = 10 * Math.sin( i2 * 0.3 ) * Math.cos( i2 * 0.1 );
}
geometry.vertices.push( new THREE.Vector3( x, y, z ) );
geometry2.vertices.push( new THREE.Vector3( x, y, z ) );
h = i2 % 2 ? 1 : 0.15;
if( i2 % 4 <= 2 ) h -= 0.15;
color = new THREE.Color( 0xffffff );
color.setHSV( 0.1 , 0, h );
geometry.colors.push( color );
geometry2.colors.push( color );
}
var tmpRot = new THREE.Matrix4();
tmpRot.makeRotationAxis( new THREE.Vector3( 1, 0, 0 ), Math.PI/2 );
xgrid = 34;
ygrid = 15;
nribbons = xgrid * ygrid;
c = 0;
for ( i = 0; i < xgrid; i ++ )
for ( j = 0; j < ygrid; j ++ ) {
materials[ c ] = new THREE.MeshBasicMaterial( { color: 0xffffff, vertexColors: true, side: THREE.DoubleSide } );
ribbon = new THREE.Ribbon( i % 2 ? geometry : geometry2, materials[ c ] );
ribbon.rotation.x = 0;
ribbon.rotation.y = Math.PI / 2;
ribbon.rotation.z = Math.PI;
x = 40 * ( i - xgrid/2 );
y = 40 * ( j - ygrid/2 );
z = 0;
ribbon.position.set( x, y, z );
materials[c].color.setHSV( i / xgrid, 0.3 + 0.7 * j / ygrid, 1 );
ribbon.matrixAutoUpdate = false;
// manually create local matrix
ribbon.matrix.setPosition( ribbon.position );
ribbon.matrixRotationWorld.setRotationFromEuler( ribbon.rotation );
ribbon.matrix.elements[ 0 ] = ribbon.matrixRotationWorld.elements[ 0 ];
ribbon.matrix.elements[ 4 ] = ribbon.matrixRotationWorld.elements[ 4 ];
ribbon.matrix.elements[ 8 ] = ribbon.matrixRotationWorld.elements[ 8 ];
ribbon.matrix.elements[ 1 ] = ribbon.matrixRotationWorld.elements[ 1 ];
ribbon.matrix.elements[ 5 ] = ribbon.matrixRotationWorld.elements[ 5 ];
ribbon.matrix.elements[ 9 ] = ribbon.matrixRotationWorld.elements[ 9 ];
ribbon.matrix.elements[ 2 ] = ribbon.matrixRotationWorld.elements[ 2 ];
ribbon.matrix.elements[ 6 ] = ribbon.matrixRotationWorld.elements[ 6 ];
ribbon.matrix.elements[ 10 ] = ribbon.matrixRotationWorld.elements[ 10 ];
ribbon.matrix.multiplySelf( tmpRot );
ribbon.matrix.scale( ribbon.scale );
ribbon.boundRadiusScale = Math.max( ribbon.scale.x, Math.max( ribbon.scale.y, ribbon.scale.z ) );
ribbons.push( ribbon );
scene.add( ribbon );
c ++;
}
scene.matrixAutoUpdate = false;
//
renderer = new THREE.WebGLRenderer( { antialias: false } );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.autoClear = false;
renderer.setClearColor( scene.fog.color, 1 );
container.appendChild( renderer.domElement );
//
stats = new Stats();
stats.domElement.style.position = 'absolute';
stats.domElement.style.top = '0px';
container.appendChild( stats.domElement );
//
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
document.addEventListener( 'touchstart', onDocumentTouchStart, false );
document.addEventListener( 'touchmove', onDocumentTouchMove, false );
//
var renderModel = new THREE.RenderPass( scene, camera );
var effectBloom = new THREE.BloomPass( 1.0 );
var effectCopy = new THREE.ShaderPass( THREE.CopyShader );
effectCopy.renderToScreen = true;
composer = new THREE.EffectComposer( renderer );
composer.addPass( renderModel );
composer.addPass( effectBloom );
composer.addPass( effectCopy );
//
window.addEventListener( 'resize', onWindowResize, false );
}
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.reset();
}
function onDocumentMouseMove( event ) {
mouseX = event.clientX - windowHalfX;
mouseY = event.clientY - windowHalfY;
}
function onDocumentTouchStart( event ) {
if ( event.touches.length === 1 ) {
event.preventDefault();
mouseX = event.touches[ 0 ].pageX - windowHalfX;
mouseY = event.touches[ 0 ].pageY - windowHalfY;
}
}
function onDocumentTouchMove( event ) {
if ( event.touches.length === 1 ) {
event.preventDefault();
mouseX = event.touches[ 0 ].pageX - windowHalfX;
mouseY = event.touches[ 0 ].pageY - windowHalfY;
}
}
//
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
var time = Date.now() * 0.00005;
camera.position.x += ( mouseX - camera.position.x ) * 0.036;
camera.position.y += ( - mouseY - camera.position.y ) * 0.036;
camera.lookAt( scene.position );
for ( i = -n; i < n; i ++ ) {
i2 = i + n;
z = 10 * Math.sin( i2 * 0.1 + time*30 );
z2 = 20 * Math.cos( Math.sin( i2 * 0.1 + time * 20 ) );
geometry.vertices[ i2 ].z = z;
geometry2.vertices[ i2 ].z = z2;
}
geometry.verticesNeedUpdate = true;
geometry2.verticesNeedUpdate = true;
for( i = 0; i < nribbons; i++ ) {
h = ( 360 * ( i / nribbons + time ) % 360 ) / 360;
materials[ i ].color.setHSV( h, 0.5 + 0.5 * ( i % 20 / 20 ), 1 );
}
renderer.clear();
composer.render( 0.1 );
}
</script>
</body>
</html>