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December 10, 2022 11:58
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Particle Waves with three.js
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/* | |
ThreeJs custom waves | |
Original script by ThreeJS : https://threejs.org/examples/canvas_particles_waves.html | |
Modified version for Cloudoru by Kevin Rajaram : http://kevinrajaram.com | |
Date: 08/14/2014 | |
*/ | |
var SEPARATION = 50, AMOUNTX = 60, AMOUNTY = 30; | |
var container; | |
var camera, scene, renderer; | |
/* | |
if (window.WebGLRenderingContext){ | |
renderer = new THREE.WebGLRenderer({ alpha: true, antialias: true }); | |
} | |
else { | |
renderer = new THREE.CanvasRenderer(); | |
} | |
*/ | |
var particles, particle, count = 0; | |
var windowHalfX = window.innerWidth / 2; | |
var windowHalfY = window.innerHeight / 2; | |
init(); | |
animate(); | |
function init() { | |
container = document.createElement( 'div' ); | |
document.body.appendChild( container ); | |
if(container) { | |
container.className += container.className ? ' waves' : 'waves'; | |
} | |
camera = new THREE.PerspectiveCamera( 120, window.innerWidth / window.innerHeight, 1, 10000 ); | |
camera.position.y = 180; //changes how far back you can see i.e the particles towards horizon | |
camera.position.z = 20; //This is how close or far the particles are seen | |
camera.rotation.x = 0.35; | |
scene = new THREE.Scene(); | |
particles = new Array(); | |
var PI2 = Math.PI * 2; | |
var material = new THREE.SpriteCanvasMaterial( { | |
color: 0xffffff, //changes color of particles | |
program: function ( context ) { | |
context.beginPath(); | |
context.arc( 0, 0, 0.5, 0, PI2, true ); | |
context.fill(); | |
} | |
} ); | |
var i = 0; | |
for ( var ix = 0; ix < AMOUNTX; ix ++ ) { | |
for ( var iy = 0; iy < AMOUNTY; iy ++ ) { | |
particle = particles[ i ++ ] = new THREE.Sprite( material ); | |
particle.position.x = ix * SEPARATION - ( ( AMOUNTX * SEPARATION ) / 2 ); | |
particle.position.z = iy * SEPARATION - ( ( AMOUNTY * SEPARATION ) - 10 ); | |
scene.add( particle ); | |
} | |
} | |
renderer = new THREE.CanvasRenderer(); | |
renderer.setSize( window.innerWidth, window.innerHeight ); | |
renderer.setClearColor( 0xEAEBE5, 1); | |
container.appendChild( renderer.domElement ); | |
window.addEventListener( 'resize', onWindowResize, false ); | |
} | |
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 animate() { | |
requestAnimationFrame( animate ); | |
render(); | |
} | |
function render() { | |
var i = 0; | |
for ( var ix = 0; ix < AMOUNTX; ix ++ ) { | |
for ( var iy = 0; iy < AMOUNTY; iy ++ ) { | |
particle = particles[ i++ ]; | |
particle.position.y = ( Math.sin( ( ix + count ) * 0.5 ) * 15 ) + ( Math.sin( ( iy + count ) * 0.5 ) * 15 ); | |
particle.scale.x = particle.scale.y = ( Math.sin( ( ix + count ) * 0.5 ) + 2 ) * 4 + ( Math.sin( ( iy + count ) * 0.5 ) + 1 ) * 4; | |
} | |
} | |
renderer.render( scene, camera ); | |
// This increases or decreases speed | |
count += 0.05; | |
} |
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<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r68/three.min.js"></script> |
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canvas{ | |
position: absolute; | |
top:0; | |
left:0; | |
z-index:-1; | |
} |
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