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canvas_lines_colors.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js canvas - lines - colors</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;
}
a {
color:#0078ff;
}
#info {
position: absolute;
top: 10px; width: 100%;
color: #ffffff;
padding: 5px;
font-family: Monospace;
font-size: 13px;
text-align: center;
z-index:100;
}
a {
color: orange;
text-decoration: none;
}
a:hover {
color: #0080ff;
}
</style>
</head>
<body>
<div id="info">
<a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - color lines
[<a href="http://en.wikipedia.org/wiki/Hilbert_curve">Hilbert curve</a> thanks to <a href="http://www.openprocessing.org/visuals/?visualID=15599">Thomas Diewald</a>]
</div>
<script src="../build/three.js"></script>
<script src="js/renderers/Projector.js"></script>
<script src="js/renderers/CanvasRenderer.js"></script>
<script src="js/Detector.js"></script>
<script src="js/geometries/hilbert3D.js"></script>
<script src="js/geometries/hilbert2D.js"></script>
<script>
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
var mouseX = 0, mouseY = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
var camera, scene, renderer;
init();
animate();
function init() {
camera = new THREE.PerspectiveCamera( 33, window.innerWidth / window.innerHeight, 1, 10000 );
camera.position.z = 1000;
scene = new THREE.Scene();
renderer = new THREE.CanvasRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
// 2d lines
var geometry2 = new THREE.Geometry(),
points = hilbert2D( new THREE.Vector3( 0, 0, 0 ), 400, 4 ),
colors2 = [];
for ( var i = 0; i < points.length; i ++ ) {
geometry2.vertices.push( points[ i ] );
colors2[ i ] = new THREE.Color( 0xffffff );
colors2[ i ].setHSL( i / points.length, 1, 0.5 );
}
geometry2.colors = colors2;
// 3d lines
var geometry3 = new THREE.Geometry(),
points = hilbert3D( new THREE.Vector3( 0, 0, 0 ), 200, 2, 0, 1, 2, 3, 4, 5, 6, 7 ),
colors3 = [];
for ( var i = 0; i < points.length; i ++ ) {
geometry3.vertices.push( points[ i ] );
colors3[ i ] = new THREE.Color( 0xffffff );
colors3[ i ].setHSL( i / points.length, 1, 0.5 );
}
geometry3.colors = colors3;
// lines
var material = new THREE.LineBasicMaterial( { color: 0xffffff, linewidth: 3, vertexColors: THREE.VertexColors } );
var line3d = new THREE.Line( geometry3, material );
line3d.scale.set( 0.4, 0.4, 0.4 );
line3d.position.set( 200, 0, 0 );
scene.add( line3d );
var line2d = new THREE.Line( geometry2, material );
line2d.scale.copy( line3d.scale );
line2d.position.set( - 200, 0, 0 );
scene.add( line2d );
//
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
document.addEventListener( 'touchstart', onDocumentTouchStart, false );
document.addEventListener( 'touchmove', onDocumentTouchMove, 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;
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();
}
function render() {
camera.position.x += ( mouseX - camera.position.x ) * 0.05;
camera.position.y += ( - mouseY + 200 - camera.position.y ) * 0.05;
camera.lookAt( scene.position );
var time = Date.now() * 0.0005;
for ( var i = 0; i < scene.children.length; i ++ ) {
var object = scene.children[ i ];
if ( object.isLine ) {
object.rotation.y = time * ( i % 2 ? 1 : -1 );
}
}
renderer.render( scene, camera );
}
</script>
</body>
</html>