forked from: forked from: 3D Perlin Particle's
/**
* Copyright fancypinknet ( http://wonderfl.net/user/fancypinknet )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/2TYk
*/
// forked from meganekake's forked from: 3D Perlin Particle's
// forked from bradsedito's 3D Perlin Particle's
package
{
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.BitmapDataChannel;
import flash.display.Sprite;
import flash.display.StageQuality;
import flash.display.StageScaleMode;
import flash.events.Event;
import flash.filters.BlurFilter;
import flash.geom.ColorTransform;
import flash.geom.Matrix;
import flash.geom.Point;
// import perlin.Particle;
[SWF(width='400',height='400',frameRate='255',backgroundColor='0x000000')]
public class Main extends Sprite
{
private const MAX_PARTICLES: int = 40000;
private const colorTransform: ColorTransform = new ColorTransform( 0.92, 0.96, 0.94 );
private const filter: BlurFilter = new BlurFilter( 4, 4, 1 );
private const origin: Point = new Point();
private var screen: BitmapData;
private var forceCalc: BitmapData;
private var forceField: BitmapData;
private var forceMatrix: Matrix;
private var octaves: Array;
private var p0: Point;
private var p1: Point;
private var particles: Particle;
private var phase0: Number;
private var phase1: Number;
private var freq0: Number;
private var freq1: Number;
public function Main()
{
init();
}
private function init(): void
{
stage.quality = StageQuality.LOW;
stage.scaleMode = StageScaleMode.NO_SCALE;
var scale: Number = 4;
screen = new BitmapData( stage.stageWidth, stage.stageHeight, false, 0 );
forceField = screen.clone();
forceCalc = new BitmapData( screen.width / scale, screen.height / scale, false, 0 );
forceMatrix = new Matrix();
forceMatrix.scale( scale, scale );
addChild( new Bitmap( screen ) );
octaves = [
p0 = new Point(),
p1 = new Point()
];
freq0 = 220 / 44100;
freq1 = 110 / 44100;
phase0 = 0.0;
phase1 = 0.0;
createParticles();
stage.addEventListener( Event.ENTER_FRAME, enterFrame );
}
private function createParticles(): void
{
var p: Particle;
var i: int = 0;
var n: int = MAX_PARTICLES;
p = particles = new Particle();
for(;i<n;++i)
{
p = p.next = new Particle();
initParticle(p);
}
}
private function initParticle(p: Particle): void
{
p.x = stage.stageWidth * 0.5;
p.y = stage.stageHeight * 0.5;
p.vx = (Math.random() - Math.random()) * 4;
p.vy = (Math.random() - Math.random()) * 4;
}
private function enterFrame( event: Event ): void
{
const width: int = screen.width;
const height: int = screen.height;
const speed: Number = 1;
var ran: Function = Math.random;
phase0 += freq0;
if( phase0 > 1 ) --phase0;
phase1 += freq1;
if( phase1 > 1 ) --phase1;
var a0: Number = phase0 * 2 * Math.PI;
var a1: Number = phase1 * 2 * Math.PI;
var sin0: Number = Math.sin( a0 );
var cos0: Number = Math.cos( a0 );
var sin1: Number = Math.sin( a1 );
var cos1: Number = Math.cos( a1 );
p0.x += speed;
p0.y -= speed;
p1.x -= speed;
p1.y += speed;
forceCalc.perlinNoise( 0x40, 0x40, 2, 0xaabbcc, false, true, BitmapDataChannel.GREEN | BitmapDataChannel.BLUE, false, octaves );
forceField.draw( forceCalc, forceMatrix );
colorTransform.redMultiplier = 0.42 + sin0 * sin0 * 0.5;
colorTransform.greenMultiplier = 0.46 + cos0 * cos0 * 0.5;
colorTransform.blueMultiplier = 0.94;
screen.applyFilter( screen, screen.rect, origin, filter );
screen.draw( screen, null, colorTransform );
var c: int;
var p: Particle = particles.next;
var r: int;
var g: int;
var b: int;
do
{
c = forceField.getPixel( p.x, p.y );
p.vx += (((c & 0xff) - 0x80)/0x80);
p.vy += ((((c >> 0x08) & 0xff) - 0x80)/0x80);
p.vx *= 0.94;
p.vy *= 0.94;
p.x += p.vx;
p.y += p.vy;
if( p.x > width )
{
p.vx *= -(1.0 + ran() + ran() + ran() + ran());
p.vx -= ran() + ran();
p.x = width - 1;
}
else
if( p.x < 0 )
{
p.vx *= -(1.0 + ran() + ran() + ran() + ran());
p.vx += ran() + ran();
p.x = 0;
}
if( p.y > height )
{
p.vy *= -(1.0 + ran() + ran() + ran() + ran());
p.vy -= ran() + ran();
p.y = height - 1;
}
else
if( p.y < 0 )
{
p.vy *= -(1.0 + ran() + ran() + ran() + ran());
p.vy += ran() + ran();
p.y = 0;
}
c = screen.getPixel( p.x, p.y );
if( 0xffffff != c )
{
r = ( c >> 0x10 ) & 0xff;
g = ( c >> 0x08 ) & 0xff;
b = c & 0xff;
r += 0x80 + cos1 * 0x60;
g += 0x80;
b += 0x10 + sin1 * 0x10;
if( r > 0xff ) r = 0xff;
if( g > 0xff ) g = 0xff;
if( b > 0xff ) b = 0xff;
screen.setPixel( p.x, p.y, (r<<0x10)|(g<<0x08)|b );
}
p = p.next;
} while(p);
}
}
}
class Particle
{
public var next: Particle;
public var x: Number;
public var y: Number;
public var vx: Number;
public var vy: Number;
}