Film2

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favorite:35
lines:69
license : MIT License
modified : 2011-07-02 22:31:09

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package{
    import flash.display.*;
    import flash.events.*;
    import flash.geom.*;
    [SWF(width=465, height=465, backgroundColor=0x0, frameRate=60)]
    
    public class Film2 extends Sprite{
        private static const W:uint = 99;
        private static const H:uint = 99;
        private var _canvas:BitmapData;
        private var _perlin:BitmapData;
        private var seed:uint = Math.floor( Math.random()*0xFFFF );
        private var point:Point = new Point(0, 0);
        private var cx:Number = stage.stageWidth/2;
        private var cy:Number = stage.stageHeight/2;
        private var ct:ColorTransform = new ColorTransform( 0, 0.8, 0.9, 0.9, 0, 0, 0, 0);
        private var sibling:Particle = null;
    
        public function Film2(){
            stage.quality = StageQuality.LOW;
            _canvas = new BitmapData( stage.stageWidth, stage.stageHeight, false, 0x0);
            _perlin = new BitmapData( W, H, false, 0x0);
            addChild( new Bitmap(_canvas) );
            for(var i:uint=0; i<W*H; i++){
                var p:Particle = new Particle( i%W-W/2, 0, Math.floor(i/W)-H/2, sibling);
                sibling = p;
            }
            this.addEventListener( Event.ENTER_FRAME, update);//
        }
        
        private function update( e:Event ):void{
            point.x = point.y ++;
            _perlin.perlinNoise( 50, 50, 2, seed, false, true, 0, true, [point]);
            var last:Particle = sibling;
            _canvas.lock();
            _canvas.colorTransform( _canvas.rect, ct);
            while(sibling){
                var p:Particle = sibling;
                var col:uint = _perlin.getPixel( p.bx+W/2, p.bz+H/2);
                var _y:Number = ( (col >> 16) - 0x80 )/1.3;
                var point:Point = p.rotate();//
                _canvas.setPixel( point.x + cx, point.y + _y + cy, col);
                sibling = p.s;
            }
            _canvas.unlock();
            sibling = last;
        }
    }
}

import flash.geom.Point;
class Particle{
    public var bx:Number;
    public var by:Number;
    public var bz:Number;
    public var s:Particle;
    private static const SP:uint = 4;
    private static const FL:uint = 250;
    private static const COS:Number = Math.cos(0.5);
    private static const SIN:Number = Math.sin(0.5);
    
    function Particle( _bx:Number=0, _by:Number=0, _bz:Number=0, _s:Particle=null){
        bx = _bx;
        by = _by;
        bz = _bz;
        s = _s;
    }
    public function rotate():Point{
        var _y:Number = by*COS - bz*SIN;
        var _z:Number = bz*COS + by*SIN;
        var scale:Number = FL/( FL + _z );
        return new Point( bx*scale*SP, _y*scale*SP);
    }
}

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