var vel0F:Object = rotate(vel0.x,
              vel0.y,
              sin,
              cos,
              false);
      var vel1F:Object = rotate(vel1.x,
              vel1.y,
              sin,
              cos,
              false);
      ball0.vx = vel0F.x;
      ball0.vy = vel0F.y;
      ball1.vx = vel1F.x;
      ball1.vy = vel1F.y;
     }
    }