flash on 2016-7-30

/**
 * Copyright mutantleg ( http://wonderfl.net/user/mutantleg )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/oyoy
 */

package {
    import flash.events.Event;
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        public function FlashTest() {
            
            stage.addEventListener(Event.ENTER_FRAME, onEnter);
        }//ctor
        
        public var cx:Number = 0;
        public var cy:Number = 0;
        public var gx:Number = 0;
        public var gy:Number = 0;
        
        public var dist:Number = 128;
        public var ang:Number = 0;
        public var gt:int = 0;
        
        public function getMag(ax:Number,ay:Number):Number
        { return Math.sqrt(ax*ax+ay*ay); }
        
        public function onEnter(e:Event):void
        {
            graphics.clear();
            graphics.lineStyle(2, 0);
            
            var mx:Number; var my:Number;
            mx = stage.mouseX; my = stage.mouseY;
            
            var ta:Number;
            ta = Math.atan2(cy-my, cx-mx);
            ta += ang;
            
            gt+=1; if (gt%30 ==0){ang = Math.random()*1.5 - 0.75; dist = 50+Math.random()*96; }
            
            graphics.drawCircle(mx, my, 8);
            
            gx = mx + Math.cos(ta) * dist;
            gy = my + Math.sin(ta) * dist;
            
            //cx += (gx-cx)*0.1;
            //cy += (gy-cy)*0.1;
            ta = Math.atan2(gy-cy, gx-cx);
            
            var ms:Number; ms = 2;
            if (getMag(gx-cx,gy-cy)<16){ms=0;}
            cx += Math.cos(ta) * ms;
            cy += Math.sin(ta) * ms;
            
            
            graphics.drawCircle(gx,gy,4);
            graphics.drawCircle(cx,cy,8);
            
            
        }//onenter
                
    }//classend
}