unity限制目标物旋转角度

根据项目需要，做一个灭火器喷火的效果，鼠标改装成了一个灭火器，在灭火器旋转的时候，场景里的灭火器也跟着旋转但是限制灭火器的旋转角度。

public Transform rotateTarget;      //  限制旋转对象
float moveSpeed = 10;
float minAngleY = 80;
float maxAngleY = 110;
float minAngleX= -20;
float maxAngleX =20;
float rotationY = 0;
float rotationX = 0;
void Update()
{

if (null == rotateTarget)
return;
rotationX +=  Input.GetAxis("Mouse X") * moveSpeed;
rotationX = Mathf.Clamp(rotationX, minAngleX, maxAngleX);
rotationY += Input.GetAxis("Mouse Y") * moveSpeed;
rotationY = Mathf.Clamp(rotationY, minAngleY, maxAngleY);
rotateTarget.localEulerAngles = new Vector3(-rotationY, rotationX, rotateTarget.rotation.z);

}