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webgl_geometry_hierarchy.html
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webgl_geometry_hierarchy.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - geometry hierarchy</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:#fff;
padding:0;
margin:0;
font-weight: bold;
overflow:hidden;
}
</style>
</head>
<body>
<script src="../build/three.js"></script>
<script src="js/libs/stats.min.js"></script>
<script>
var camera, scene, renderer, stats, group;
var mouseX = 0, mouseY = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
init();
animate();
function init() {
camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 1, 10000 );
camera.position.z = 500;
scene = new THREE.Scene();
scene.background = new THREE.Color( 0xffffff );
scene.fog = new THREE.Fog( 0xffffff, 1, 10000 );
var geometry = new THREE.BoxBufferGeometry( 100, 100, 100 );
var material = new THREE.MeshNormalMaterial();
group = new THREE.Group();
for ( var i = 0; i < 1000; i ++ ) {
var mesh = new THREE.Mesh( geometry, material );
mesh.position.x = Math.random() * 2000 - 1000;
mesh.position.y = Math.random() * 2000 - 1000;
mesh.position.z = Math.random() * 2000 - 1000;
mesh.rotation.x = Math.random() * 2 * Math.PI;
mesh.rotation.y = Math.random() * 2 * Math.PI;
mesh.matrixAutoUpdate = false;
mesh.updateMatrix();
group.add( mesh );
}
scene.add( group );
//
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
//
stats = new Stats();
document.body.appendChild( stats.dom );
//
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
//
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 );
}
function onDocumentMouseMove( event ) {
mouseX = ( event.clientX - windowHalfX ) * 10;
mouseY = ( event.clientY - windowHalfY ) * 10;
}
//
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
var time = Date.now() * 0.001;
var rx = Math.sin( time * 0.7 ) * 0.5,
ry = Math.sin( time * 0.3 ) * 0.5,
rz = Math.sin( time * 0.2 ) * 0.5;
camera.position.x += ( mouseX - camera.position.x ) * 0.05;
camera.position.y += ( - mouseY - camera.position.y ) * 0.05;
camera.lookAt( scene.position );
group.rotation.x = rx;
group.rotation.y = ry;
group.rotation.z = rz;
renderer.render( scene, camera );
}
</script>
</body>
</html>