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webgl_lines_splines.html
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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">
<style type="text/css">
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://github.com/mrdoob/three.js" 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 type="text/javascript" src="../build/Three.js"></script>
<script type="text/javascript" src="js/Detector.js"></script>
<script type="text/javascript" src="js/RequestAnimationFrame.js"></script>
<script type="text/javascript" src="js/Stats.js"></script>
<script type="text/javascript">
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
var postprocessing = false;
var mouseX = 0, mouseY = 0,
windowHalfX = window.innerWidth / 2,
windowHalfY = window.innerHeight / 2,
camera, scene, renderer, material;
var cameraOrtho, sceneScreen, rtTexture1, rtTexture2, rtTexture3, materialScreen, materialConvolution, blurx, blury, quadScreen;
init();
animate();
function init() {
var i, n_sub, container;
container = document.createElement('div');
document.body.appendChild(container);
camera = new THREE.Camera( 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 );
renderer.autoClear = false;
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.Vertex( 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 } );
var line, p, scale = 0.3, d = 225,
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 ] ];
material.vertexColors = true;
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.addObject( line );
}
// postprocessing
cameraOrtho = new THREE.Camera();
cameraOrtho.projectionMatrix = THREE.Matrix4.makeOrtho( window.innerWidth / - 2, window.innerWidth / 2, window.innerHeight / 2, window.innerHeight / - 2, -10000, 10000 );
cameraOrtho.position.z = 100;
sceneScreen = new THREE.Scene();
var pars = { minFilter: THREE.LinearFilter, magFilter: THREE.LinearFilter };
rtTexture1 = new THREE.WebGLRenderTarget( window.innerWidth, window.innerHeight, pars );
rtTexture2 = new THREE.WebGLRenderTarget( 512, 512, pars );
rtTexture3 = new THREE.WebGLRenderTarget( 512, 512, pars );
var screen_shader = THREE.ShaderUtils.lib["screen"];
var screen_uniforms = THREE.UniformsUtils.clone( screen_shader.uniforms );
screen_uniforms["tDiffuse"].texture = rtTexture1;
screen_uniforms["opacity"].value = 1.0;
materialScreen = new THREE.MeshShaderMaterial( {
uniforms: screen_uniforms,
vertexShader: screen_shader.vertexShader,
fragmentShader: screen_shader.fragmentShader,
blending: THREE.AdditiveBlending
} );
var convolution_shader = THREE.ShaderUtils.lib["convolution"];
var convolution_uniforms = THREE.UniformsUtils.clone( convolution_shader.uniforms );
blurx = new THREE.Vector2( 0.001953125, 0.0 ),
blury = new THREE.Vector2( 0.0, 0.001953125 );
convolution_uniforms["tDiffuse"].texture = rtTexture1;
convolution_uniforms["uImageIncrement"].value = blurx;
convolution_uniforms["cKernel"].value = THREE.ShaderUtils.buildKernel( 4.0 );
materialConvolution = new THREE.MeshShaderMaterial( {
uniforms: convolution_uniforms,
vertexShader: "#define KERNEL_SIZE 25.0\n" + convolution_shader.vertexShader,
fragmentShader: "#define KERNEL_SIZE 25\n" + convolution_shader.fragmentShader
} );
var plane = new THREE.Plane( window.innerWidth, window.innerHeight );
quadScreen = new THREE.Mesh( plane, materialConvolution );
quadScreen.position.z = -100;
sceneScreen.addObject( quadScreen );
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 );
}
// 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 = [];
tmp = tmp.concat( hilbert3D ( vec[ 0 ], half, iterations, v0, v3, v4, v7, v6, v5, v2, v1 ) );
tmp = tmp.concat( hilbert3D ( vec[ 1 ], half, iterations, v0, v7, v6, v1, v2, v5, v4, v3 ) );
tmp = tmp.concat( hilbert3D ( vec[ 2 ], half, iterations, v0, v7, v6, v1, v2, v5, v4, v3 ) );
tmp = tmp.concat( hilbert3D ( vec[ 3 ], half, iterations, v2, v3, v0, v1, v6, v7, v4, v5 ) );
tmp = tmp.concat( hilbert3D ( vec[ 4 ], half, iterations, v2, v3, v0, v1, v6, v7, v4, v5 ) );
tmp = tmp.concat( hilbert3D ( vec[ 5 ], half, iterations, v4, v3, v2, v5, v6, v1, v0, v7 ) );
tmp = tmp.concat( hilbert3D ( vec[ 6 ], half, iterations, v4, v3, v2, v5, v6, v1, v0, v7 ) );
tmp = tmp.concat( 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.updateMatrix();
var time = new Date().getTime() * 0.0005;
for( var i = 0; i<scene.objects.length; i++ ) {
scene.objects[i].rotation.y = time * ( i % 2 ? 1 : -1);
}
renderer.clear();
if ( postprocessing ) {
// Render scene into texture
renderer.render( scene, camera, rtTexture1 );
// Render quad with blured scene into texture (convolution pass 1)
quadScreen.materials = [ materialConvolution ];
materialConvolution.uniforms.tDiffuse.texture = rtTexture1;
materialConvolution.uniforms.uImageIncrement.value = blurx;
renderer.render( sceneScreen, cameraOrtho, rtTexture2 );
// Render quad with blured scene into texture (convolution pass 2)
materialConvolution.uniforms.tDiffuse.texture = rtTexture2;
materialConvolution.uniforms.uImageIncrement.value = blury;
renderer.render( sceneScreen, cameraOrtho, rtTexture3 );
// Render original scene with superimposed blur to texture
quadScreen.materials = [ materialScreen ];
materialScreen.uniforms.tDiffuse.texture = rtTexture3;
materialScreen.uniforms.opacity.value = 1.3;
renderer.render( sceneScreen, cameraOrtho, rtTexture1, false );
// Render to screen
materialScreen.uniforms.tDiffuse.texture = rtTexture1;
renderer.render( sceneScreen, cameraOrtho );
} else {
renderer.render( scene, camera );
}
}
</script>
</body>
</html>