flash on 2012-9-21

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

package {
    import flash.events.MouseEvent;
    import flash.events.Event;
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        
        public function FlashTest() {
          
          stage.addEventListener(Event.ENTER_FRAME, onEnter);  
          stage.addEventListener(MouseEvent.MOUSE_DOWN, mdown);
        }//ctor
        
        public function mdown(e:MouseEvent):void
        {
            vx -= mouseX - ax;
            vy -= mouseY - ay;
            }//mdown
        
        public var ax:Number = 0;
        public var ay:Number = 0;
        public var vx:Number = 0;
        public var vy:Number = 0;
        
        public function onEnter(e:Event):void
        {
            var dx:Number;
            var dy:Number;
            var nx:Number;
            var ny:Number;
            var mag:Number;
            var ks:Number
            
            dx = 200 - ax;
            dy = 200 - ay;
            mag = Math.sqrt(dx*dx + dy*dy);
            if (mag == 0) { mag = 0.00000001;}
            nx = dx/mag;
            ny = dy/mag;
            
            ks = vx * nx + vy * ny;
            
            vx += nx * (mag) * 0.4;
            vy += ny * (mag) * 0.4;
            
            if (vx > 8) { vx = 8;}
            if (vx < -8) { vx = -8;}
            if (vy > 8) { vy = 8;}
            if (vy <-8) { vy = -8;}
            
            //vx += 0.25 * dx * 0.1 ;
            //vy += 0.25 * dy * 0.1 ;
            
            
            
            vx *= 0.85;
            vy *= 0.85;
            
            ax += vx;
            ay += vy;
            
            graphics.clear();
            graphics.lineStyle(2,0);
            graphics.drawCircle(ax,ay,16);
            graphics.moveTo(ax,ay);
            graphics.lineTo(200,200);
            
        }//onenter
        
    }//classend
}