Created
January 31, 2018 07:39
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var SEPARATION = 80, AMOUNTX = 50, AMOUNTY = 50; | |
var container, stats; | |
var camera, scene, renderer; | |
var startX, startY; | |
var particles, particle, count = 0; | |
var windowHalfX = window.innerWidth / 2; | |
var windowHalfY = window.innerHeight / 3; | |
var mouseX = 0, mouseY = 50; | |
init(); | |
animate(); | |
function init() { | |
container = document.createElement( 'div' ); | |
document.body.appendChild( container ); | |
//camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 1, 10000 ); | |
//camera.position.z = 1000; | |
camera = new THREE.PerspectiveCamera( 125, window.innerWidth / window.innerHeight, 1, 10000 ); | |
camera.position.z = 1100; | |
scene = new THREE.Scene(); | |
particles = new Array(); | |
var PI2 = Math.PI * 2; | |
var material = new THREE.SpriteCanvasMaterial( { | |
color: 0xffffff, | |
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 ) / 2 ); | |
scene.add( particle ); | |
} | |
} | |
renderer = new THREE.CanvasRenderer(); | |
renderer.setPixelRatio( window.devicePixelRatio ); | |
renderer.setSize( window.innerWidth, window.innerHeight ); | |
container.appendChild( renderer.domElement ); | |
document.addEventListener( 'mousemove', onDocumentMouseMove, false ); | |
document.addEventListener( 'touchstart', onDocumentTouchStart, false ); | |
document.addEventListener( 'touchmove', onDocumentTouchMove, false ); | |
// | |
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 onDocumentMouseMove( event ) { | |
console.log(event.clientX, windowHalfX, event.clientX - windowHalfX); | |
console.log(event.clientY, windowHalfY, event.clientY - windowHalfY); | |
mouseX = event.clientX - windowHalfX; | |
mouseY = event.clientY - windowHalfY; | |
} | |
function onDocumentTouchStart( event ) { | |
if ( event.touches.length === 1 ) { | |
event.preventDefault(); | |
mouseX = event.touches[ 0 ].pageX - windowHalfX; | |
mouseY = event.touches[ 0 ].pageY - windowHalfY; | |
} | |
} | |
function onDocumentTouchMove( event ) { | |
if ( event.touches.length === 1 ) { | |
event.preventDefault(); | |
mouseX = event.touches[ 0 ].pageX - windowHalfX; | |
mouseY = event.touches[ 0 ].pageY - windowHalfY; | |
} | |
} | |
// | |
function animate() { | |
requestAnimationFrame( animate ); | |
render(); | |
//stats.update(); | |
} | |
function render() { | |
camera.position.x += ( mouseX/3 - camera.position.x ) * .05; | |
camera.position.y += 36 + ( - mouseY/3 - camera.position.y ) * .12; | |
camera.lookAt( scene.position ); | |
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 ) * 0.3 ) * 50 ) + | |
( Math.sin( ( iy + count ) * 0.5 ) * 50 ); | |
particle.scale.x = particle.scale.y = ( Math.sin( ( ix + count ) * 0.3 ) + 1 ) * 4 + | |
( Math.sin( ( iy + count ) * 0.5 ) + 1 ) * 4; | |
} | |
} | |
renderer.render( scene, camera ); | |
count += 0.1; | |
} |
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