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.
216 lines
5.3 KiB
216 lines
5.3 KiB
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<title>three.js webgl - particles - sprites</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="info">
|
|
<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - webgl particle sprites example<br/>
|
|
snowflakes by <a href="http://en.wikipedia.org/wiki/File:Sketch_of_snow_crystal_by_Ren%C3%A9_Descartes.jpg">René Descartes</a>
|
|
</div>
|
|
|
|
<!-- 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 { GUI } from 'three/addons/libs/lil-gui.module.min.js';
|
|
|
|
let camera, scene, renderer, stats, parameters;
|
|
let mouseX = 0, mouseY = 0;
|
|
|
|
let windowHalfX = window.innerWidth / 2;
|
|
let windowHalfY = window.innerHeight / 2;
|
|
|
|
const materials = [];
|
|
|
|
init();
|
|
animate();
|
|
|
|
function init() {
|
|
|
|
camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 1, 2000 );
|
|
camera.position.z = 1000;
|
|
|
|
scene = new THREE.Scene();
|
|
scene.fog = new THREE.FogExp2( 0x000000, 0.0008 );
|
|
|
|
const geometry = new THREE.BufferGeometry();
|
|
const vertices = [];
|
|
|
|
const textureLoader = new THREE.TextureLoader();
|
|
|
|
const sprite1 = textureLoader.load( 'textures/sprites/snowflake1.png' );
|
|
const sprite2 = textureLoader.load( 'textures/sprites/snowflake2.png' );
|
|
const sprite3 = textureLoader.load( 'textures/sprites/snowflake3.png' );
|
|
const sprite4 = textureLoader.load( 'textures/sprites/snowflake4.png' );
|
|
const sprite5 = textureLoader.load( 'textures/sprites/snowflake5.png' );
|
|
|
|
for ( let i = 0; i < 10000; i ++ ) {
|
|
|
|
const x = Math.random() * 2000 - 1000;
|
|
const y = Math.random() * 2000 - 1000;
|
|
const z = Math.random() * 2000 - 1000;
|
|
|
|
vertices.push( x, y, z );
|
|
|
|
}
|
|
|
|
geometry.setAttribute( 'position', new THREE.Float32BufferAttribute( vertices, 3 ) );
|
|
|
|
parameters = [
|
|
[[ 1.0, 0.2, 0.5 ], sprite2, 20 ],
|
|
[[ 0.95, 0.1, 0.5 ], sprite3, 15 ],
|
|
[[ 0.90, 0.05, 0.5 ], sprite1, 10 ],
|
|
[[ 0.85, 0, 0.5 ], sprite5, 8 ],
|
|
[[ 0.80, 0, 0.5 ], sprite4, 5 ]
|
|
];
|
|
|
|
for ( let i = 0; i < parameters.length; i ++ ) {
|
|
|
|
const color = parameters[ i ][ 0 ];
|
|
const sprite = parameters[ i ][ 1 ];
|
|
const size = parameters[ i ][ 2 ];
|
|
|
|
materials[ i ] = new THREE.PointsMaterial( { size: size, map: sprite, blending: THREE.AdditiveBlending, depthTest: false, transparent: true } );
|
|
materials[ i ].color.setHSL( color[ 0 ], color[ 1 ], color[ 2 ] );
|
|
|
|
const particles = new THREE.Points( geometry, materials[ i ] );
|
|
|
|
particles.rotation.x = Math.random() * 6;
|
|
particles.rotation.y = Math.random() * 6;
|
|
particles.rotation.z = Math.random() * 6;
|
|
|
|
scene.add( particles );
|
|
|
|
}
|
|
|
|
//
|
|
|
|
renderer = new THREE.WebGLRenderer();
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
document.body.appendChild( renderer.domElement );
|
|
|
|
//
|
|
|
|
stats = new Stats();
|
|
document.body.appendChild( stats.dom );
|
|
|
|
//
|
|
|
|
const gui = new GUI();
|
|
|
|
const params = {
|
|
texture: true
|
|
};
|
|
|
|
gui.add( params, 'texture' ).onChange( function ( value ) {
|
|
|
|
for ( let i = 0; i < materials.length; i ++ ) {
|
|
|
|
materials[ i ].map = ( value === true ) ? parameters[ i ][ 1 ] : null;
|
|
materials[ i ].needsUpdate = true;
|
|
|
|
}
|
|
|
|
} );
|
|
|
|
gui.open();
|
|
|
|
document.body.style.touchAction = 'none';
|
|
document.body.addEventListener( 'pointermove', onPointerMove );
|
|
|
|
//
|
|
|
|
window.addEventListener( 'resize', onWindowResize );
|
|
|
|
}
|
|
|
|
function onWindowResize() {
|
|
|
|
windowHalfX = window.innerWidth / 2;
|
|
windowHalfY = window.innerHeight / 2;
|
|
|
|
camera.aspect = window.innerWidth / window.innerHeight;
|
|
camera.updateProjectionMatrix();
|
|
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
|
|
}
|
|
|
|
function onPointerMove( event ) {
|
|
|
|
if ( event.isPrimary === false ) return;
|
|
|
|
mouseX = event.clientX - windowHalfX;
|
|
mouseY = event.clientY - windowHalfY;
|
|
|
|
}
|
|
|
|
//
|
|
|
|
function animate() {
|
|
|
|
requestAnimationFrame( animate );
|
|
|
|
render();
|
|
stats.update();
|
|
|
|
}
|
|
|
|
function render() {
|
|
|
|
const time = Date.now() * 0.00005;
|
|
|
|
camera.position.x += ( mouseX - camera.position.x ) * 0.05;
|
|
camera.position.y += ( - mouseY - camera.position.y ) * 0.05;
|
|
|
|
camera.lookAt( scene.position );
|
|
|
|
for ( let i = 0; i < scene.children.length; i ++ ) {
|
|
|
|
const object = scene.children[ i ];
|
|
|
|
if ( object instanceof THREE.Points ) {
|
|
|
|
object.rotation.y = time * ( i < 4 ? i + 1 : - ( i + 1 ) );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
for ( let i = 0; i < materials.length; i ++ ) {
|
|
|
|
const color = parameters[ i ][ 0 ];
|
|
|
|
const h = ( 360 * ( color[ 0 ] + time ) % 360 ) / 360;
|
|
materials[ i ].color.setHSL( h, color[ 1 ], color[ 2 ] );
|
|
|
|
}
|
|
|
|
renderer.render( scene, camera );
|
|
|
|
}
|
|
|
|
</script>
|
|
</body>
|
|
</html>
|
|
|