How to calibrate the mobile gyroscope ?

Question

Hi,

I want to use my mobile phone to view 360 pictures. Here is my problem :

When I make complex movements the camera is disturbed...
When the scene starts, the camera does not initialize in the right direction...

I make tests with this script that I attach to the camera :

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class gyro01 : MonoBehaviour
 {
     void Start()
     {
         Input.gyro.enabled = true;
     }
 
     void Update()
     {
         this.transform.Rotate (-Input.gyro.rotationRateUnbiased.x, -Input.gyro.rotationRateUnbiased.y, 0);
     }
 }

The script "work pretty well" when I use my mobile facing a vertical plane in irl and on the x and y axis

Initialization vertical plane | only x and y axis alt text

Problem number one : If I rotate on the x-axis when my mobile is not perfectly aligned with the y-axis (and conversely), then the camera position is disturbed...

Initialization vertical plane | x, y and z axis alt text

Problem number two : In this case, when the scene starts the mobile is lying on a horizontal plane, and yet the camera is looking straight ahead. It should be looking down...

Initialization horizontal plane | x axis alt text

Thank you for your help ! :)

Answer 1

Yh, I had many problems when beginning to implement gyroscope in my project. Heres my entire gyro script, which should solve your problems! (Script was attached to the main camera, that's it, no setup required)

 public class Gyroscope : MonoBehaviour
 {
     private bool gyroEnabled; 
     private UnityEngine.Gyroscope gyro;
     private GameObject GyroControl;
     private Quaternion rot;
 
     private void Start()
     {
         Screen.sleepTimeout = SleepTimeout.NeverSleep;
 
         GyroControl = new GameObject("Gyro Control");
         GyroControl.transform.position = transform.position; 
         transform.SetParent(GyroControl.transform); //parents the object to an empty control object
         gyroEnabled = EnableGyro();
     }
     private bool EnableGyro()
     {
         if (SystemInfo.supportsGyroscope)
         {
             gyro = Input.gyro;
             gyro.enabled = true;
 
             GyroControl.transform.rotation = Quaternion.Euler(90f, -90f, 0f); //These offset values are essential for the gyroscope to orientate itself correctly
             rot = new Quaternion(0, 0, 1, 0);
 
             return true;
         }
         return false;
     }
     private void Update()
     {
         Quaternion rotMin = Quaternion.Euler(new Vector3(0, 0, 0));
 
         Quaternion rotation = transform.rotation; //Values for locking the rotation of the gyro
 
         if (gyroEnabled)
         {
             transform.localRotation = gyro.attitude * rot;
         }
 
         if (rotation.y < rotMin.y)
         {
             transform.eulerAngles = Vector3.zero; //Doesnt allow rotation values to be in the negative
         }
     }
 }

How to calibrate the mobile gyroscope ?

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