flash on 2015-8-12

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

package {
    import flash.events.Event;
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        public function FlashTest() {

            fa = new xFeet();
            fb = new xFeet();
            
            fa.cx = 230; fa.cy = 200;
            fb.cx = 260; fb.cy = 200;
            
            fe = fa; fw = fb;

           stage.addEventListener(Event.ENTER_FRAME, onEnter);         
        }//ctor
        
        public var fa:xFeet;   
        public var fb:xFeet;
        public var fe:xFeet;
        public var fw:xFeet;
        
        public var vx:Number = 0;
        public var vy:Number = 0;

        public function swapFeet():void
        { var a:xFeet; a = fb; fb=fa; fa= a; }

        public function onEnter(e:Event):void
        {
            var mx:Number; var my:Number;
            mx = stage.mouseX; my = stage.mouseY;
            
            graphics.clear();
            graphics.lineStyle(2, 0);
            
             graphics.drawCircle(fa.cx, fa.cy, 8);

            graphics.beginFill(0, 1);             
             graphics.drawCircle(fb.cx, fb.cy, 8);
            graphics.endFill(); 
             
             var ax:Number; var ay:Number;
             ax = (fa.cx+fb.cx)*0.5;
             ay = (fa.cy+fb.cy)*0.5;
             
             graphics.drawCircle(ax, ay, 16);
             graphics.moveTo(ax-8, ay);
             graphics.lineTo(fe.cx,fe.cy);
             graphics.moveTo(ax+8, ay);
             graphics.lineTo(fw.cx,fw.cy);
             
             
             var ta:Number;
             var ms:Number;
             ms = 2;
             ta = Math.atan2(my-ay, mx-ax);
             vx = Math.cos(ta)*ms;
             vy = Math.sin(ta)*ms;
             
             fa.cx += vx;    fa.cy += vy;
           
             if (vx > 0 && fa.cx > fb.cx && fa.cx > fb.cx+32) { swapFeet(); }       
             if (vx > 0 && fa.cx < fb.cx && fa.cx > fb.cx-2) { swapFeet(); }       
            
             if (vx < 0 && fa.cx < fb.cx && fa.cx < fb.cx-32) { swapFeet(); }       
             if (vx < 0 && fa.cx > fb.cx && fa.cx < fb.cx+2) { swapFeet(); }       
             
//             if (vx < 0 && fa.cx < fb.cx-32) { swapFeet(); }
                    
             if (vy > 0 && fa.cy > fb.cy+32) { swapFeet(); }       
             if (vy < 0 && fa.cy < fb.cy-32) { swapFeet(); }       


             var mag:Number;
             var dx:Number; var dy:Number;
             dx =fa.cx-fb.cx; dy= fa.cy-fb.cy;
             mag= Math.sqrt(dx*dx+dy*dy);
             if (mag == 0) {mag = 0.1;}
             if (mag < 8)
             {
                dx /= mag;
                dy /= mag;
                fa.cx += dx*mag*0.5;
                fa.cy += dy*mag*0.5;
             } //endif
                  
            
        }//onenter
        
        
    }//classend
}

internal class xFeet
{
    public var cx:Number = 0;
    public var cy:Number = 0;
    
}//xfeet