public TurtleMoveBack(ZLogoActionBase turtleAction, float distance)
: base(turtleAction)
{
//_startTurleInfo = turtleAction.GetEndTurleInfo().Clone();
var angle = _startTurleInfo.Angle + 180;
var speed = _startTurleInfo.MoveSpeed;
Vector2 ToPosition = Vector2Util.GetPointByPolar(_startTurleInfo.X, _startTurleInfo.Y, distance, angle);
//_endTurleInfo = _startTurleInfo.Clone();
_endTurleInfo.X = ToPosition.X;
_endTurleInfo.Y = ToPosition.Y;
speedX = (float)(speed * MathUtil.Cos(angle));
speedY = (float)(speed * MathUtil.Sin(angle));
}