unity 只有一个方向旋转的陀螺仪

最近在做一个2d项目，但是要配合外设来做，只需要使物体按照手机左右（y轴）的旋转来进行平面上的旋转，所以呢，之前的陀螺仪用起来就不是很方便了。

无奈之下只能舍弃之前的脚本了（附上之前的完整的代码）

using System.Collections;using System.Collections.Generic;using UnityEngine;/// <summary>/// 重力感应/// </summary>public class GyroController : MonoBehaviour {    #region [Private fields]    private bool gyroEnabled = true;    private const float lowPassFilterFactor = 0.2f;    private readonly Quaternion baseIdentity = Quaternion.Euler(90, 0, 0);    private readonly Quaternion landscapeRight = Quaternion.Euler(0, 0, 90);    private readonly Quaternion landscapeLeft = Quaternion.Euler(0, 0, -90);    private readonly Quaternion upsideDown = Quaternion.Euler(0, 0, 180);    private Quaternion cameraBase = Quaternion.identity;    private Quaternion calibration = Quaternion.identity;    private Quaternion baseOrientation = Quaternion.Euler(90, 0, 0);    private Quaternion baseOrientationRotationFix = Quaternion.identity;    private Quaternion referanceRotation = Quaternion.identity;    private bool debug = true;    #endregion    #region [Unity events]    protected void Start()    {        AttachGyro();    }    protected void Update()    {        if (!gyroEnabled)            return;        transform.rotation = Quaternion.Slerp(transform.rotation,         cameraBase * (ConvertRotation(referanceRotation * Input.gyro.attitude) * GetRotFix()), lowPassFilterFactor);    }    protected void OnGUI()    {        if (!debug)            return;        GUILayout.Label("方向: " + Screen.orientation);        GUILayout.Label("校准: " + calibration);        GUILayout.Label("摄像头底座: " + cameraBase);        GUILayout.Label("陀螺仪状态: " + Input.gyro.attitude);        GUILayout.Label("变换的旋转: " + transform.rotation);        if (GUILayout.Button("ON / OFF陀螺仪: " + Input.gyro.enabled, GUILayout.Height(100)))        {            Input.gyro.enabled = !Input.gyro.enabled;        }        if (GUILayout.Button("ON / OFF陀螺仪控制器: " + gyroEnabled, GUILayout.Height(100)))        {            if (gyroEnabled)            {                DetachGyro();            }            else            {                AttachGyro();            }        }        if (GUILayout.Button("更新陀螺仪校准（水平）", GUILayout.Height(80)))        {            UpdateCalibration(true);        }        if (GUILayout.Button("更新相机基地旋转（水平）", GUILayout.Height(80)))        {            UpdateCameraBaseRotation(true);        }        if (GUILayout.Button("复位的基本取向", GUILayout.Height(80)))        {            ResetBaseOrientation();        }        if (GUILayout.Button("复位旋转摄像头", GUILayout.Height(80)))        {            transform.rotation = Quaternion.identity;        }    }    #endregion    #region [Public methods]    /// <summary>    /// 将陀螺控制器连接到变换.    /// </summary>    private void AttachGyro()    {        gyroEnabled = true;        ResetBaseOrientation();        UpdateCalibration(true);        UpdateCameraBaseRotation(true);        RecalculateReferenceRotation();    }    /// <summary>    /// 将陀螺控制器从变换    /// </summary>    private void DetachGyro()    {        gyroEnabled = false;    }    #endregion    #region [Private methods]    /// <summary>    /// 更新陀螺校准。    /// </summary>    private void UpdateCalibration(bool onlyHorizontal)    {        if (onlyHorizontal)        {            var fw = (Input.gyro.attitude) * (-Vector3.forward);            fw.z = 0;            if (fw == Vector3.zero)            {                calibration = Quaternion.identity;            }            else            {                calibration = (Quaternion.FromToRotation(baseOrientationRotationFix * Vector3.up, fw));            }        }        else        {            calibration = Input.gyro.attitude;        }    }    /// <summary>    /// 更新相机底座旋转。    /// </summary>    /// <param name='onlyHorizontal'>    /// 只有Y旋转。    /// </param>    private void UpdateCameraBaseRotation(bool onlyHorizontal)    {        if (onlyHorizontal)        {            var fw = transform.forward;            fw.y = 0;            if (fw == Vector3.zero)            {                cameraBase = Quaternion.identity;            }            else            {                cameraBase = Quaternion.FromToRotation(Vector3.forward, fw);            }        }        else        {            cameraBase = transform.rotation;        }    }    /// <summary>    /// 将旋转从右交给左手。    /// </summary>    /// <returns>    ///返回角度    /// </returns>    /// <param name='q'>    /// 旋转转换。    /// </param>    private static Quaternion ConvertRotation(Quaternion q)    {        return new Quaternion(q.x, q.y, -q.z, -q.w);    }    /// <summary>    /// 获得不同方向的修复。    /// </summary>    /// <returns>    /// The rot fix.    /// </returns>    private Quaternion GetRotFix()    {#if UNITY_3_5        if (Screen.orientation == ScreenOrientation.Portrait)            return Quaternion.identity;        if (Screen.orientation == ScreenOrientation.LandscapeLeft || Screen.orientation == ScreenOrientation.Landscape)            return landscapeLeft;        if (Screen.orientation == ScreenOrientation.LandscapeRight)            return landscapeRight;                       if (Screen.orientation == ScreenOrientation.PortraitUpsideDown)            return upsideDown;         return Quaternion.identity;  #else        return Quaternion.identity;#endif    }    /// <summary>    /// 重新计算的参考系统。    /// </summary>    private void ResetBaseOrientation()    {        baseOrientationRotationFix = GetRotFix();        baseOrientation = baseOrientationRotationFix * baseIdentity;    }    /// <summary>    /// 重新计算基准旋转。    /// </summary>    private void RecalculateReferenceRotation()    {        referanceRotation = Quaternion.Inverse(baseOrientation) * Quaternion.Inverse(calibration);    }    #endregion}

但是这个脚本已经不适合目前的使用 所以果断抛弃他。下面附上符合要求的脚本（自己写的很短很短的）（感谢小于同志的博客和热心帮助）

using UnityEngine;using System.Collections;/// <summary>/// 陀螺仪/// </summary>public class TuoLuoYi : MonoBehaviour{    bool gyinfo;    Gyroscope go;    void Start()    {        gyinfo = SystemInfo.supportsGyroscope;        go = Input.gyro;        go.enabled = true;    }    void Update()    {        if (gyinfo)        {            Vector3 a = go.attitude.eulerAngles;           a = new Vector3(-a.x, -a.y, a.z);            //直接使用读取的欧拉角发现不对，于是自己调整一下符号               this.transform.eulerAngles =new Vector3(0,a.x,0);        }    }}

是不是很短啊，这样只是实现了简单的我想要的功能，并没有上面那些矫正角度一些代码了，不过这样能实现我的功能就够了。