<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - materials - grass</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:#030;
color:#fff;
padding:0;
margin:0;
overflow:hidden;
font-family:georgia;
text-align:center;
}
</style>
</head>
<body>
<script src="../build/three.min.js"></script>
<script src="js/Detector.js"></script>
<script>
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
var camera, scene, renderer;
init();
animate();
function init() {
camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 1, 1000 );
camera.position.set( 0, 75, 100 );
scene = new THREE.Scene();
var geometry = new THREE.PlaneBufferGeometry( 100, 100 );
var texture = new THREE.Texture( generateTexture() );
texture.needsUpdate = true;
for ( var i = 0; i < 15; i ++ ) {
var material = new THREE.MeshBasicMaterial( {
color: new THREE.Color().setHSL( 0.3, 0.75, ( i / 15 ) * 0.4 + 0.1 ),
map: texture,
depthTest: false,
depthWrite: false,
transparent: true
} );
var mesh = new THREE.Mesh( geometry, material );
mesh.position.y = i * 0.25;
mesh.rotation.x = - Math.PI / 2;
scene.add( mesh );
}
scene.children.reverse();
renderer = new THREE.WebGLRenderer();
renderer.setClearColor( 0x003300 );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
//
window.addEventListener( 'resize', onWindowResize, false );
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
function generateTexture() {
var canvas = document.createElement( 'canvas' );
canvas.width = 512;
canvas.height = 512;
var context = canvas.getContext( '2d' );
for ( var i = 0; i < 20000; i ++ ) {
context.fillStyle = 'hsl(0,0%,' + ( Math.random() * 50 + 50 ) + '%)';
context.beginPath();
context.arc( Math.random() * canvas.width, Math.random() * canvas.height, Math.random() + 0.15, 0, Math.PI * 2, true );
context.fill();
}
context.globalAlpha = 0.075;
context.globalCompositeOperation = 'lighter';
return canvas;
}
//
function animate() {
requestAnimationFrame( animate );
render();
}
function render() {
var time = Date.now() / 6000;
camera.position.x = 80 * Math.cos( time );
camera.position.z = 80 * Math.sin( time );
camera.lookAt( scene.position );
for ( var i = 0, l = scene.children.length; i < l; i ++ ) {
var mesh = scene.children[ i ];
mesh.position.x = Math.sin( time * 4 ) * i * i * 0.005;
mesh.position.z = Math.cos( time * 6 ) * i * i * 0.005;
}
renderer.render( scene, camera );
}
</script>
</body>
</html>