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.
241 lines
5.4 KiB
241 lines
5.4 KiB
2 years ago
|
<!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">
|
||
|
|
<link type="text/css" rel="stylesheet" href="main.css">
|
||
|
|
</head>
|
||
|
|
|
||
|
|
<body>
|
||
|
|
<div id="container"></div>
|
||
|
|
<div id="info"><a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - interactive - particles</div>
|
||
|
|
|
||
|
|
<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 pointTexture;
|
||
|
|
uniform float alphaTest;
|
||
|
|
|
||
|
|
varying vec3 vColor;
|
||
|
|
|
||
|
|
void main() {
|
||
|
|
|
||
|
|
gl_FragColor = vec4( color * vColor, 1.0 );
|
||
|
|
|
||
|
|
gl_FragColor = gl_FragColor * texture2D( pointTexture, gl_PointCoord );
|
||
|
|
|
||
|
|
if ( gl_FragColor.a < alphaTest ) discard;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<!-- Import maps polyfill -->
|
||
|
|
<!-- Remove this when import maps will be widely supported -->
|
||
|
|
<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
|
||
|
|
|
||
|
|
<script type="importmap">
|
||
|
|
{
|
||
|
|
"imports": {
|
||
|
|
"three": "../build/three.module.js",
|
||
|
|
"three/addons/": "./jsm/"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<script type="module">
|
||
|
|
|
||
|
|
import * as THREE from 'three';
|
||
|
|
|
||
|
|
import Stats from 'three/addons/libs/stats.module.js';
|
||
|
|
|
||
|
|
import * as BufferGeometryUtils from 'three/addons/utils/BufferGeometryUtils.js';
|
||
|
|
|
||
|
|
let renderer, scene, camera, stats;
|
||
|
|
|
||
|
|
let particles;
|
||
|
|
|
||
|
|
const PARTICLE_SIZE = 20;
|
||
|
|
|
||
|
|
let raycaster, intersects;
|
||
|
|
let pointer, INTERSECTED;
|
||
|
|
|
||
|
|
init();
|
||
|
|
animate();
|
||
|
|
|
||
|
|
function init() {
|
||
|
|
|
||
|
|
const container = document.getElementById( 'container' );
|
||
|
|
|
||
|
|
scene = new THREE.Scene();
|
||
|
|
|
||
|
|
camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 10000 );
|
||
|
|
camera.position.z = 250;
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
let boxGeometry = new THREE.BoxGeometry( 200, 200, 200, 16, 16, 16 );
|
||
|
|
|
||
|
|
// if normal and uv attributes are not removed, mergeVertices() can't consolidate indentical vertices with different normal/uv data
|
||
|
|
|
||
|
|
boxGeometry.deleteAttribute( 'normal' );
|
||
|
|
boxGeometry.deleteAttribute( 'uv' );
|
||
|
|
|
||
|
|
boxGeometry = BufferGeometryUtils.mergeVertices( boxGeometry );
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
const positionAttribute = boxGeometry.getAttribute( 'position' );
|
||
|
|
|
||
|
|
const colors = [];
|
||
|
|
const sizes = [];
|
||
|
|
|
||
|
|
const color = new THREE.Color();
|
||
|
|
|
||
|
|
for ( let i = 0, l = positionAttribute.count; i < l; i ++ ) {
|
||
|
|
|
||
|
|
color.setHSL( 0.01 + 0.1 * ( i / l ), 1.0, 0.5 );
|
||
|
|
color.toArray( colors, i * 3 );
|
||
|
|
|
||
|
|
sizes[ i ] = PARTICLE_SIZE * 0.5;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
const geometry = new THREE.BufferGeometry();
|
||
|
|
geometry.setAttribute( 'position', positionAttribute );
|
||
|
|
geometry.setAttribute( 'customColor', new THREE.Float32BufferAttribute( colors, 3 ) );
|
||
|
|
geometry.setAttribute( 'size', new THREE.Float32BufferAttribute( sizes, 1 ) );
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
const material = new THREE.ShaderMaterial( {
|
||
|
|
|
||
|
|
uniforms: {
|
||
|
|
color: { value: new THREE.Color( 0xffffff ) },
|
||
|
|
pointTexture: { value: new THREE.TextureLoader().load( 'textures/sprites/disc.png' ) },
|
||
|
|
alphaTest: { value: 0.9 }
|
||
|
|
},
|
||
|
|
vertexShader: document.getElementById( 'vertexshader' ).textContent,
|
||
|
|
fragmentShader: document.getElementById( 'fragmentshader' ).textContent
|
||
|
|
|
||
|
|
} );
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
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();
|
||
|
|
pointer = new THREE.Vector2();
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
stats = new Stats();
|
||
|
|
container.appendChild( stats.dom );
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
window.addEventListener( 'resize', onWindowResize );
|
||
|
|
document.addEventListener( 'pointermove', onPointerMove );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function onPointerMove( event ) {
|
||
|
|
|
||
|
|
pointer.x = ( event.clientX / window.innerWidth ) * 2 - 1;
|
||
|
|
pointer.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;
|
||
|
|
|
||
|
|
const geometry = particles.geometry;
|
||
|
|
const attributes = geometry.attributes;
|
||
|
|
|
||
|
|
raycaster.setFromCamera( pointer, 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>
|