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webgl_buffergeometry_lines.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - buffergeometry - lines</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 {
color: #cccccc;
font-family:Monospace;
font-size:13px;
text-align:center;
background-color: #000000;
margin: 0px;
overflow: hidden;
}
#info {
position: absolute;
top: 0px; width: 100%;
padding: 5px;
}
a {
color: #0080ff;
}
</style>
</head>
<body>
<div id="container"></div>
<div id="info"><a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - buffergeometry - lines</div>
<script src="../build/three.js"></script>
<script src="js/WebGL.js"></script>
<script src="js/libs/stats.min.js"></script>
<script>
if ( WEBGL.isWebGLAvailable() === false ) {
document.body.appendChild( WEBGL.getWebGLErrorMessage() );
}
var container, stats;
var camera, scene, renderer;
var mesh;
init();
animate();
function init() {
container = document.getElementById( 'container' );
//
camera = new THREE.PerspectiveCamera( 27, window.innerWidth / window.innerHeight, 1, 4000 );
camera.position.z = 2750;
scene = new THREE.Scene();
var segments = 10000;
var geometry = new THREE.BufferGeometry();
var material = new THREE.LineBasicMaterial( { vertexColors: THREE.VertexColors } );
var positions = [];
var colors = [];
var r = 800;
for ( var i = 0; i < segments; i ++ ) {
var x = Math.random() * r - r / 2;
var y = Math.random() * r - r / 2;
var z = Math.random() * r - r / 2;
// positions
positions.push( x, y, z );
// colors
colors.push( ( x / r ) + 0.5 );
colors.push( ( y / r ) + 0.5 );
colors.push( ( z / r ) + 0.5 );
}
geometry.addAttribute( 'position', new THREE.Float32BufferAttribute( positions, 3 ) );
geometry.addAttribute( 'color', new THREE.Float32BufferAttribute( colors, 3 ) );
geometry.computeBoundingSphere();
mesh = new THREE.Line( geometry, material );
scene.add( mesh );
//
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.gammaInput = true;
renderer.gammaOutput = true;
container.appendChild( renderer.domElement );
//
stats = new Stats();
container.appendChild( stats.dom );
//
window.addEventListener( 'resize', onWindowResize, false );
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
//
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
var time = Date.now() * 0.001;
mesh.rotation.x = time * 0.25;
mesh.rotation.y = time * 0.5;
renderer.render( scene, camera );
}
</script>
</body>
</html>