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webgl_lines_splines.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - lines - splines</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">three.js</a> - splines WebGL demo
[<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.min.js"></script>
<script src="js/Detector.js"></script>
<script src="js/libs/stats.min.js"></script>
<script>
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
var mouseX = 0, mouseY = 0,
windowHalfX = window.innerWidth / 2,
windowHalfY = window.innerHeight / 2,
camera, scene, renderer, material;
init();
animate();
function init() {
var i, n_sub, container;
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.PerspectiveCamera( 33, window.innerWidth / window.innerHeight, 1, 10000 );
camera.position.z = 700;
scene = new THREE.Scene();
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );
var geometry = new THREE.Geometry(),
geometry2 = new THREE.Geometry(),
geometry3 = new THREE.Geometry(),
points = hilbert3D( new THREE.Vector3( 0,0,0 ), 200.0, 1, 0, 1, 2, 3, 4, 5, 6, 7 ),
colors = [], colors2 = [], colors3 = [];
n_sub = 6;
var position, index;
var spline = new THREE.Spline( points );
for ( i = 0; i < points.length * n_sub; i ++ ) {
index = i / ( points.length * n_sub );
position = spline.getPoint( index );
geometry.vertices[ i ] = new THREE.Vector3( position.x, position.y, position.z );
colors[ i ] = new THREE.Color( 0xffffff );
colors[ i ].setHSV( 0.6, ( 200 + position.x ) / 400, 1.0 );
colors2[ i ] = new THREE.Color( 0xffffff );
//colors2[ i ].setHSV( 0.1, 1.0, ( 200 + position.x ) / 400 );
colors2[ i ].setHSV( 0.9, ( 200 + position.y ) / 400, 1.0 );
colors3[ i ] = new THREE.Color( 0xffffff );
colors3[ i ].setHSV( i / ( points.length * n_sub ), 1.0, 1.0 );
}
geometry2.vertices = geometry3.vertices = geometry.vertices;
geometry.colors = colors;
geometry2.colors = colors2;
geometry3.colors = colors3;
// lines
material = new THREE.LineBasicMaterial( { color: 0xffffff, opacity: 1, linewidth: 3, vertexColors: THREE.VertexColors } );
var line, p, scale = 0.3, d = 225;
var parameters = [
[ material, scale*1.5, [-d,0,0], geometry ],
[ material, scale*1.5, [0,0,0], geometry2 ],
[ material, scale*1.5, [d,0,0], geometry3 ]
];
for ( i = 0; i < parameters.length; ++ i ) {
p = parameters[ i ];
line = new THREE.Line( p[ 3 ], p[ 0 ] );
line.scale.x = line.scale.y = line.scale.z = p[ 1 ];
line.position.x = p[ 2 ][ 0 ];
line.position.y = p[ 2 ][ 1 ];
line.position.z = p[ 2 ][ 2 ];
scene.add( line );
}
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 );
//
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 );
}
// port of Processing Java code by Thomas Diewald
// http://www.openprocessing.org/visuals/?visualID=15599
function hilbert3D( center, side, iterations, v0, v1, v2, v3, v4, v5, v6, v7 ) {
var half = side/2,
vec_s = [
new THREE.Vector3( center.x - half, center.y + half, center.z - half ),
new THREE.Vector3( center.x - half, center.y + half, center.z + half ),
new THREE.Vector3( center.x - half, center.y - half, center.z + half ),
new THREE.Vector3( center.x - half, center.y - half, center.z - half ),
new THREE.Vector3( center.x + half, center.y - half, center.z - half ),
new THREE.Vector3( center.x + half, center.y - half, center.z + half ),
new THREE.Vector3( center.x + half, center.y + half, center.z + half ),
new THREE.Vector3( center.x + half, center.y + half, center.z - half )
],
vec = [ vec_s[ v0 ], vec_s[ v1 ], vec_s[ v2 ], vec_s[ v3 ], vec_s[ v4 ], vec_s[ v5 ], vec_s[ v6 ], vec_s[ v7 ] ];
if( --iterations >= 0 ) {
var tmp = [];
Array.prototype.push.apply( tmp, hilbert3D ( vec[ 0 ], half, iterations, v0, v3, v4, v7, v6, v5, v2, v1 ) );
Array.prototype.push.apply( tmp, hilbert3D ( vec[ 1 ], half, iterations, v0, v7, v6, v1, v2, v5, v4, v3 ) );
Array.prototype.push.apply( tmp, hilbert3D ( vec[ 2 ], half, iterations, v0, v7, v6, v1, v2, v5, v4, v3 ) );
Array.prototype.push.apply( tmp, hilbert3D ( vec[ 3 ], half, iterations, v2, v3, v0, v1, v6, v7, v4, v5 ) );
Array.prototype.push.apply( tmp, hilbert3D ( vec[ 4 ], half, iterations, v2, v3, v0, v1, v6, v7, v4, v5 ) );
Array.prototype.push.apply( tmp, hilbert3D ( vec[ 5 ], half, iterations, v4, v3, v2, v5, v6, v1, v0, v7 ) );
Array.prototype.push.apply( tmp, hilbert3D ( vec[ 6 ], half, iterations, v4, v3, v2, v5, v6, v1, v0, v7 ) );
Array.prototype.push.apply( tmp, hilbert3D ( vec[ 7 ], half, iterations, v6, v5, v2, v1, v0, v3, v4, v7 ) );
return tmp;
}
return vec;
}
//
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 ) * .05;
camera.position.y += ( - mouseY + 200 - camera.position.y ) * .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 instanceof THREE.Line ) {
object.rotation.y = time * ( i % 2 ? 1 : -1 );
}
}
renderer.render( scene, camera );
}
</script>
</body>
</html>