Unity3D script for rotating camera with a phone's gyro. Includes smoothing and initial offset. Edited from https://forum.unity3d.com/threads/sharing-gyroscope-camera-script-ios-tested.241825/

GyroCamera.cs

using UnityEngine;
using System.Collections;

public class GyroCamera : MonoBehaviour
{
    // STATE
    private float _initialYAngle = 0f;
    private float _appliedGyroYAngle = 0f;
    private float _calibrationYAngle = 0f;
    private Transform _rawGyroRotation;
    private float _tempSmoothing;

    // SETTINGS
    [SerializeField] private float _smoothing = 0.1f;

    private IEnumerator Start()
    {
        Input.gyro.enabled = true;
        Application.targetFrameRate = 60;
        _initialYAngle = transform.eulerAngles.y;

        _rawGyroRotation = new GameObject("GyroRaw").transform;
        _rawGyroRotation.position = transform.position;
        _rawGyroRotation.rotation = transform.rotation;

        // Wait until gyro is active, then calibrate to reset starting rotation.
        yield return new WaitForSeconds(1);

        StartCoroutine(CalibrateYAngle());
    }

    private void Update()
    {
        ApplyGyroRotation();
        ApplyCalibration();

        transform.rotation = Quaternion.Slerp(transform.rotation, _rawGyroRotation.rotation, _smoothing);
    }

    private IEnumerator CalibrateYAngle()
    {
        _tempSmoothing = _smoothing;
        _smoothing = 1;
        _calibrationYAngle = _appliedGyroYAngle - _initialYAngle; // Offsets the y angle in case it wasn't 0 at edit time.
        yield return null;
        _smoothing = _tempSmoothing;
    }

    private void ApplyGyroRotation()
    {
        _rawGyroRotation.rotation = Input.gyro.attitude;
        _rawGyroRotation.Rotate(0f, 0f, 180f, Space.Self); // Swap "handedness" of quaternion from gyro.
        _rawGyroRotation.Rotate(90f, 180f, 0f, Space.World); // Rotate to make sense as a camera pointing out the back of your device.
        _appliedGyroYAngle = _rawGyroRotation.eulerAngles.y; // Save the angle around y axis for use in calibration.
    }

    private void ApplyCalibration()
    {
        _rawGyroRotation.Rotate(0f, -_calibrationYAngle, 0f, Space.World); // Rotates y angle back however much it deviated when calibrationYAngle was saved.
    }

    public void SetEnabled(bool value)
    {
        enabled = true;
        StartCoroutine(CalibrateYAngle());
    }
}

Ok, I've solved it - I made the rotation rather directly to the Player object underneath.

Hi , Thanks for sharing the code.
It works absolutely perfect with the phones sensors.

Love you!

Hi, i just want to contribute here, here is the shorter :)

using UnityEngine;
using System.Collections;

public class Main_Script : MonoBehaviour
{
private Quaternion Rotation_Origin;
private Gyroscope Gyroscope_Reference;

private void Awake()
{
    Gyroscope_Reference = Input.gyro;
    Gyroscope_Reference.enabled = true;
    StartCoroutine(Coroutine_Method());
}

private IEnumerator Coroutine_Method()
{
    yield return null;
    Quaternion Rotation_Origin_Addend = Quaternion.Euler(0, 0, 180);
    Rotation_Origin = Gyroscope_Reference.attitude * Rotation_Origin_Addend;

    Quaternion Gyroscope_Attitude_Difference_Addend = Quaternion.Euler(180, 180, 0);

    while (true)
    {
        Quaternion Gyroscope_Attitude_Difference = Quaternion.Inverse(Rotation_Origin) * Gyroscope_Reference.attitude;
        Gyroscope_Attitude_Difference *= Gyroscope_Attitude_Difference_Addend;

        Quaternion Lerped_Quaternion = Quaternion.Lerp(transform.rotation, Gyroscope_Attitude_Difference, 8 * Time.deltaTime);
        transform.rotation = Lerped_Quaternion;

        //transform.Rotate(0f, 0f, 180f, Space.Self);
        //transform.Rotate(-180f, 180f, 0, Space.World);
        yield return null;
    }
}

}

Thank you for sharing.
It will help me a lot.

Having some issues with this code as the rotation keeps trying to stabilize, creating some weird twitching left and right in view. Is there a way to make this happen less?

@metehelde
check if you have real physical gyro installed in your device - sometimes gyro is emulated with the accelerometer/compass combination, but then it often is not so perfect like with the real gyro, and more or less twitching can be observed then.

I can't thank you enough, man. Two weeks on this jittering... What I gained from the code was learning how to create an additional game object to handle the attitude data. I can't tell you how many iterations I have gone through in trying to resolve the jittering. I couldn't put a game out there like that. Literally saved my project to find this and dissect it to get what I needed out of it. One of the best nights I have had in at least two weeks. lol This made it all come together. Thank you a thousand times over.

All goods. I just stole it from the link in the description really.

@that1phillips the new gameobject is kinda just to visualize what it's doing in the editor. You could store the rotations n things just as a variable in the script instead. [SerializeField] is cool for that if you don't know. https://answers.unity.com/questions/21198/viewing-private-variables-in-the-inspector.html
It's a good way to learn just figuring out what others do well, and improve on it. Keep going :D

Thank you for sharing this. I extended it to include X and Z axis when calibrating so you can re-center in any direction and at a variable speed.
https://gist.github.com/blevok/0b5f4c821f019dd1d74fce98c9de3d5f

Goooooooood

@kormyen I like your script, but is there away to avoid that abrupt snap on the start? Which I assume has to do with the calibration. Maybe do it like threejs does? Take a look at this, no snapping. If you find a way to remove the initial snap your script will be perfect!

Thank you!!! Spent like 40$ on plugins before I found this, this should be included in unity gyro sample!

you are the best man!

This code is amazing!
Thank you!

Thanks a lot for the solution

@that1phillips
How exactly did you manage to stop the jittering?

It's in controlling the slurp. What I've learned is that it also depends on the hardware in the phone. Some phones do better than others. I still haven't finished the project, but have had over 250 people testing it on the android store.

…

On Wed, Apr 7, 2021, 12:22 AM BranCo2 ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ @that1phillips <https://github.com/that1phillips> How exactly did you manage to stop the jittering? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <https://gist.github.com/a1e3c144a30fc26393f14f09989f03e1#gistcomment-3696097>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AK6M5MVZ56BEN3WS4NF7WC3THPMXHANCNFSM4HPSRXJQ> .

@that1phillips
Hi. You mentioned controlling the slerp? I'm not very experienced with coding sorry. Can you please give me an example of what you mean?

Is there a way to lock every rotation except Y axis?

Nice project broo

How to I lock the Y axis rotation