You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
250 lines
5.3 KiB
250 lines
5.3 KiB
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<title>three.js webgl - interactive 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" rel="noopener">three.js</a> webgl - interactive - particles</div>
|
|
|
|
<script src="../build/three.js"></script>
|
|
|
|
<script src="js/WebGL.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 / -mvPosition.z );
|
|
|
|
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 );
|
|
|
|
if ( gl_FragColor.a < ALPHATEST ) discard;
|
|
|
|
}
|
|
|
|
</script>
|
|
|
|
|
|
<script>
|
|
|
|
if ( WEBGL.isWebGLAvailable() === false ) {
|
|
|
|
document.body.appendChild( WEBGL.getWebGLErrorMessage() );
|
|
|
|
}
|
|
|
|
var renderer, scene, camera, stats;
|
|
|
|
var particles;
|
|
|
|
var PARTICLE_SIZE = 20;
|
|
|
|
var raycaster, intersects;
|
|
var mouse, INTERSECTED;
|
|
|
|
init();
|
|
animate();
|
|
|
|
function init() {
|
|
|
|
var container = document.getElementById( 'container' );
|
|
|
|
scene = new THREE.Scene();
|
|
|
|
camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 10000 );
|
|
camera.position.z = 250;
|
|
|
|
//
|
|
|
|
var vertices = new THREE.BoxGeometry( 200, 200, 200, 16, 16, 16 ).vertices;
|
|
|
|
var positions = new Float32Array( vertices.length * 3 );
|
|
var colors = new Float32Array( vertices.length * 3 );
|
|
var sizes = new Float32Array( vertices.length );
|
|
|
|
var vertex;
|
|
var color = new THREE.Color();
|
|
|
|
for ( var i = 0, l = vertices.length; i < l; i ++ ) {
|
|
|
|
vertex = vertices[ i ];
|
|
vertex.toArray( positions, i * 3 );
|
|
|
|
color.setHSL( 0.01 + 0.1 * ( i / l ), 1.0, 0.5 );
|
|
color.toArray( colors, i * 3 );
|
|
|
|
sizes[ i ] = PARTICLE_SIZE * 0.5;
|
|
|
|
}
|
|
|
|
var geometry = new THREE.BufferGeometry();
|
|
geometry.addAttribute( 'position', new THREE.BufferAttribute( positions, 3 ) );
|
|
geometry.addAttribute( 'customColor', new THREE.BufferAttribute( colors, 3 ) );
|
|
geometry.addAttribute( 'size', new THREE.BufferAttribute( sizes, 1 ) );
|
|
|
|
//
|
|
|
|
var material = new THREE.ShaderMaterial( {
|
|
|
|
uniforms: {
|
|
color: { value: new THREE.Color( 0xffffff ) },
|
|
texture: { value: new THREE.TextureLoader().load( "textures/sprites/disc.png" ) }
|
|
},
|
|
vertexShader: document.getElementById( 'vertexshader' ).textContent,
|
|
fragmentShader: document.getElementById( 'fragmentshader' ).textContent,
|
|
|
|
alphaTest: 0.9
|
|
|
|
} );
|
|
|
|
//
|
|
|
|
particles = new THREE.Points( geometry, material );
|
|
scene.add( particles );
|
|
|
|
//
|
|
|
|
renderer = new THREE.WebGLRenderer();
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
container.appendChild( renderer.domElement );
|
|
|
|
//
|
|
|
|
raycaster = new THREE.Raycaster();
|
|
mouse = new THREE.Vector2();
|
|
|
|
//
|
|
|
|
stats = new Stats();
|
|
container.appendChild( stats.dom );
|
|
|
|
//
|
|
|
|
window.addEventListener( 'resize', onWindowResize, false );
|
|
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
|
|
|
|
}
|
|
|
|
function onDocumentMouseMove( event ) {
|
|
|
|
event.preventDefault();
|
|
|
|
mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
|
|
mouse.y = - ( event.clientY / window.innerHeight ) * 2 + 1;
|
|
|
|
}
|
|
|
|
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() {
|
|
|
|
particles.rotation.x += 0.0005;
|
|
particles.rotation.y += 0.001;
|
|
|
|
var geometry = particles.geometry;
|
|
var attributes = geometry.attributes;
|
|
|
|
raycaster.setFromCamera( mouse, camera );
|
|
|
|
intersects = raycaster.intersectObject( particles );
|
|
|
|
if ( intersects.length > 0 ) {
|
|
|
|
if ( INTERSECTED != intersects[ 0 ].index ) {
|
|
|
|
attributes.size.array[ INTERSECTED ] = PARTICLE_SIZE;
|
|
|
|
INTERSECTED = intersects[ 0 ].index;
|
|
|
|
attributes.size.array[ INTERSECTED ] = PARTICLE_SIZE * 1.25;
|
|
attributes.size.needsUpdate = true;
|
|
|
|
}
|
|
|
|
} else if ( INTERSECTED !== null ) {
|
|
|
|
attributes.size.array[ INTERSECTED ] = PARTICLE_SIZE;
|
|
attributes.size.needsUpdate = true;
|
|
INTERSECTED = null;
|
|
|
|
}
|
|
|
|
renderer.render( scene, camera );
|
|
|
|
}
|
|
|
|
</script>
|
|
|
|
</body>
|
|
|
|
</html>
|