SetCorrectCameraHeight.cs

using UnityEngine;
using UnityEngine.XR;

public class SetCorrectCameraHeight : MonoBehaviour
{
    enum TrackingSpace
    {
        Stationary,
        RoomScale
    }

    [Header("Camera Settings")]

    [SerializeField]
    [Tooltip("Decide if experience is Room Scale or Stationary. Note this option does nothing for mobile VR experiences, these experience will default to Stationary")]
    TrackingSpace m_TrackingSpace = TrackingSpace.Stationary;

    [SerializeField]
    [Tooltip("Camera Height - overwritten by device settings when using Room Scale ")]
    float m_StationaryCameraYOffset = 1.36144f;

    [SerializeField]
    [Tooltip("GameObject to move to desired height off the floor (defaults to this object if none provided)")]
    GameObject m_CameraFloorOffsetObject;

    void Awake()
    {
        if (!m_CameraFloorOffsetObject)
        {
            Debug.LogWarning("No camera container specified for VR Rig, using attached GameObject");
            m_CameraFloorOffsetObject = this.gameObject;
        }

    }

    void Start()
    {
        SetCameraHeight();
    }

    void SetCameraHeight()
    {
        float cameraYOffset = m_StationaryCameraYOffset;
        if (m_TrackingSpace == TrackingSpace.Stationary)
        {
            XRDevice.SetTrackingSpaceType(TrackingSpaceType.Stationary);
            InputTracking.Recenter();
        }
        else if (m_TrackingSpace == TrackingSpace.RoomScale)
        {
            if (XRDevice.SetTrackingSpaceType(TrackingSpaceType.RoomScale))
                cameraYOffset = 0;
        }

        //Move camera to correct height
        if (m_CameraFloorOffsetObject)
            m_CameraFloorOffsetObject.transform.localPosition = new Vector3(m_CameraFloorOffsetObject.transform.localPosition.x, cameraYOffset, m_CameraFloorOffsetObject.transform.localPosition.z);
    }
}