// forked from ton's Colorful Rings // basic logic from yossy a.k.a. BeInteractive // http://www.be-interactive.org/?itemid=278 package { import flash.display.Bitmap; import flash.display.BitmapData; import flash.display.Sprite; import flash.events.Event; import flash.geom.Matrix; [SWF(width="465", height="465", backgroundColor="0xffffff", frameRate="40")] public class KaleidoscopeLogic extends Sprite { private var container:Sprite; private var bmd:BitmapData; private var base:BitmapData; private var mtx_ul:Matrix; // Matrix positions at upper left private var mtx_ur:Matrix; // Matrix positions at upper right private var mtx_ll:Matrix; // Matrix positions at lower left private var mtx_lr:Matrix; // Matrix positions at lower right public function KaleidoscopeLogic() { container = new Sprite(); base = new BitmapData( 465, 465, false ); mtx_ul = new Matrix(); mtx_ur = new Matrix(); mtx_ur.scale( -1, 1 ); mtx_ur.translate( 465, 0 ); mtx_ll = new Matrix(); mtx_ll.scale( 1, -1 ); mtx_ll.translate( 0, 465 ); mtx_lr = new Matrix(); mtx_lr.scale( -1, -1 ); mtx_lr.translate( 465, 465 ); addChild( new Bitmap( base ) ); addEventListener( Event.ENTER_FRAME, onEnterFrameHandler ); }; private function onEnterFrameHandler( e:Event ):void { base.lock(); bmd = new BitmapData( 233, 233, true ); createRings( bmd ); drawBaseBitmapData( base, bmd ); bmd.dispose(); base.unlock(); }; private function createRings( src:BitmapData ):void { var ring:Ring = new Ring( Math.random() * 90 + 10, Math.random() * 0xFFFFFF ); ring.x = Math.random() * 320; ring.y = Math.random() * 240; container.addChild( ring ); src.draw( container ); }; private function drawBaseBitmapData( dest:BitmapData, source:BitmapData ):void { dest.fillRect( dest.rect, 0xFFFFFFFF ); dest.draw( source, mtx_ul ); dest.draw( source, mtx_ur ); dest.draw( source, mtx_ll ); dest.draw( source, mtx_lr ); }; }; }; import flash.display.Sprite; import flash.events.Event; class Ring extends Sprite { private const DECAY:Number = 0.95; public function Ring( size:int = 30, color:uint = 0x000000 ) { this.graphics.clear(); this.graphics.lineStyle( Math.random() * 10, color ); this.graphics.drawCircle( 200, 200, size ); addEventListener( Event.ENTER_FRAME, onEnterFrameHandler ); }; private function onEnterFrameHandler( e:Event ):void { this.scaleX *= DECAY; this.scaleY *= DECAY; if( this.scaleX <= 0.01 ) { this.parent.removeChild( this ); removeEventListener( Event.ENTER_FRAME, onEnterFrameHandler ); } }; };