I'm trying to make a simple VR cardboard game using Google VR SDK for Unity. I'm really confused about the problem as my title. Will the values got from


change when the orientation of smartphone change from Portrait to Landscape Left/Right?

The following code works in Unity demo (after press play button and use alt+right-click to trigger head movement simulation), but I don't have a cardboard so I'm not sure whether it will still work on smartphone with landscape left or right attached to a cardboard.

private void Update()
    // forward if the value is positive.
    float forwardValue = GvrViewr.Instance.HeadPose.Orientation.x;
    // turn left if the value is negative.
    float turnValue = GvrViewr.Instance.HeadPose.Orientation.y;

private void Move()
    Vector3 movement = transform.forward * forwardValue * m_Speed * Time.deltaTime;

    // Apply this movement to the rigidbody's position.
    m_Rigidbody.MovePosition(m_Rigidbody.position + movement);

private void Turn()

    // Determine the number of degrees to be turned based on the input, speed and time between frames.
    float turn = turnValue * m_TurnSpeed * Time.deltaTime;

    // Make this into a rotation in the y axis.
    Quaternion turnRotation = Quaternion.Euler(0f, turn, 0f);

    // Apply this rotation to the rigidbody's rotation.
    m_Rigidbody.MoveRotation(m_Rigidbody.rotation * turnRotation);
  • 1
    \$\begingroup\$ This looks like a quaternion field. Accessing an individual component of a quaternion is typically not a meaningful measure of direction. Can you clarify what you're trying to accomplish with this code? There may be more robust ways to get that outcome. \$\endgroup\$ – DMGregory Dec 3 '19 at 15:44
  • \$\begingroup\$ @DMGregory: I think you're right, although I don't know what is quaternion... \$\endgroup\$ – Niing Dec 3 '19 at 15:55
  • \$\begingroup\$ Did you consider looking it up? It's not a secret code-word, it's a standard data structure used widely in game development. \$\endgroup\$ – DMGregory Dec 3 '19 at 16:02
  • \$\begingroup\$ @DMGregory: I've updated it again, I think my problem is simple and not related to math... \$\endgroup\$ – Niing Dec 3 '19 at 17:07

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