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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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