mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
synced 2024-12-23 11:33:49 +01:00
225 lines
4.8 KiB
HTML
Executable File
225 lines
4.8 KiB
HTML
Executable File
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<title>three.js webgl - buffer geometry custom attributes - particles</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: #ffffff;
|
|
background-color: #000000;
|
|
margin: 0px;
|
|
overflow: hidden;
|
|
}
|
|
#info {
|
|
position: absolute;
|
|
top: 0px;
|
|
width: 100%;
|
|
padding: 5px;
|
|
font-family: Monospace;
|
|
font-size: 13px;
|
|
text-align: center;
|
|
font-weight: bold;
|
|
}
|
|
a {
|
|
color: #fff;
|
|
}
|
|
</style>
|
|
</head>
|
|
|
|
<body>
|
|
<div id="container"></div>
|
|
<div id="info"><a href="http://threejs.org" target="_blank">three.js</a> webgl - buffergeometry custom attributes - particles</div>
|
|
|
|
<script src="../build/three.min.js"></script>
|
|
|
|
<script src="js/Detector.js"></script>
|
|
<script src="js/libs/stats.min.js"></script>
|
|
|
|
<script type="x-shader/x-vertex" id="vertexshader">
|
|
|
|
attribute float size;
|
|
attribute vec3 customColor;
|
|
|
|
varying vec3 vColor;
|
|
|
|
void main() {
|
|
|
|
vColor = customColor;
|
|
|
|
vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );
|
|
|
|
gl_PointSize = size * ( 300.0 / length( mvPosition.xyz ) );
|
|
|
|
gl_Position = projectionMatrix * mvPosition;
|
|
|
|
}
|
|
|
|
</script>
|
|
|
|
<script type="x-shader/x-fragment" id="fragmentshader">
|
|
|
|
uniform vec3 color;
|
|
uniform sampler2D texture;
|
|
|
|
varying vec3 vColor;
|
|
|
|
void main() {
|
|
|
|
gl_FragColor = vec4( color * vColor, 1.0 );
|
|
|
|
gl_FragColor = gl_FragColor * texture2D( texture, gl_PointCoord );
|
|
|
|
}
|
|
|
|
</script>
|
|
|
|
|
|
<script>
|
|
|
|
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
|
|
|
|
var renderer, scene, camera, stats;
|
|
|
|
var particleSystem, uniforms, geometry;
|
|
|
|
var particles = 100000;
|
|
|
|
var WIDTH = window.innerWidth;
|
|
var HEIGHT = window.innerHeight;
|
|
|
|
init();
|
|
animate();
|
|
|
|
function init() {
|
|
|
|
camera = new THREE.PerspectiveCamera( 40, WIDTH / HEIGHT, 1, 10000 );
|
|
camera.position.z = 300;
|
|
|
|
scene = new THREE.Scene();
|
|
|
|
var attributes = {
|
|
|
|
size: { type: 'f', value: null },
|
|
customColor: { type: 'c', value: null }
|
|
|
|
};
|
|
|
|
uniforms = {
|
|
|
|
color: { type: "c", value: new THREE.Color( 0xffffff ) },
|
|
texture: { type: "t", value: THREE.ImageUtils.loadTexture( "textures/sprites/spark1.png" ) }
|
|
|
|
};
|
|
|
|
var shaderMaterial = new THREE.ShaderMaterial( {
|
|
|
|
uniforms: uniforms,
|
|
attributes: attributes,
|
|
vertexShader: document.getElementById( 'vertexshader' ).textContent,
|
|
fragmentShader: document.getElementById( 'fragmentshader' ).textContent,
|
|
|
|
blending: THREE.AdditiveBlending,
|
|
depthTest: false,
|
|
transparent: true
|
|
|
|
});
|
|
|
|
|
|
var radius = 200;
|
|
|
|
geometry = new THREE.BufferGeometry();
|
|
|
|
var positions = new Float32Array( particles * 3 );
|
|
var values_color = new Float32Array( particles * 3 );
|
|
var values_size = new Float32Array( particles );
|
|
|
|
var color = new THREE.Color();
|
|
|
|
for( var v = 0; v < particles; v++ ) {
|
|
|
|
values_size[ v ] = 20;
|
|
|
|
positions[ v * 3 + 0 ] = ( Math.random() * 2 - 1 ) * radius;
|
|
positions[ v * 3 + 1 ] = ( Math.random() * 2 - 1 ) * radius;
|
|
positions[ v * 3 + 2 ] = ( Math.random() * 2 - 1 ) * radius;
|
|
|
|
color.setHSL( v / particles, 1.0, 0.5 );
|
|
|
|
values_color[ v * 3 + 0 ] = color.r;
|
|
values_color[ v * 3 + 1 ] = color.g;
|
|
values_color[ v * 3 + 2 ] = color.b;
|
|
|
|
}
|
|
|
|
geometry.addAttribute( 'position', new THREE.BufferAttribute( positions, 3 ) );
|
|
geometry.addAttribute( 'customColor', new THREE.BufferAttribute( values_color, 3 ) );
|
|
geometry.addAttribute( 'size', new THREE.BufferAttribute( values_size, 1 ) );
|
|
|
|
particleSystem = new THREE.PointCloud( geometry, shaderMaterial );
|
|
|
|
scene.add( particleSystem );
|
|
|
|
renderer = new THREE.WebGLRenderer();
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
|
renderer.setSize( WIDTH, HEIGHT );
|
|
|
|
var container = document.getElementById( 'container' );
|
|
container.appendChild( renderer.domElement );
|
|
|
|
stats = new Stats();
|
|
stats.domElement.style.position = 'absolute';
|
|
stats.domElement.style.top = '0px';
|
|
container.appendChild( stats.domElement );
|
|
|
|
//
|
|
|
|
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() * 0.005;
|
|
|
|
particleSystem.rotation.z = 0.01 * time;
|
|
|
|
var size = geometry.attributes.size.array;
|
|
|
|
for( var i = 0; i < particles; i++ ) {
|
|
|
|
size[ i ] = 10 * ( 1 + Math.sin( 0.1 * i + time ) );
|
|
|
|
}
|
|
|
|
geometry.attributes.size.needsUpdate = true;
|
|
|
|
renderer.render( scene, camera );
|
|
|
|
}
|
|
|
|
|
|
</script>
|
|
|
|
</body>
|
|
|
|
</html>
|