CODEWITHSUNDEEP
unity-game-enginegoogle-cardboard
Lukesoft
Lukesoft

Reputation: 953

Stop, Disable or Pause head tracking google cardboard

I am making a google cardboard game using unity3d and google cardboard sdk. I would like to find out if the best way to disable/enable head tracking so that I can stop the game when it ends or before it starts.

Upvotes: 1

Views: 2370

Answers (4)

chelder
chelder

Reputation: 3987

On September the 6th 2017, the GvrHead.cs does not exist anymore. I have been able to disable head tracking with the following code:

VRDevice.DisableAutoVRCameraTracking(Camera.main, true);

Reference page: https://docs.unity3d.com/ScriptReference/VR.VRDevice.DisableAutoVRCameraTracking.html

Notice it only works in the smartphone after building it. It does not work in the Unity Game preview, and it has other issues. I have asked about these issues here: https://github.com/googlevr/gvr-unity-sdk/issues/716

So the long best solution is probably:

private void TrackPositionAndRotation (bool track){
    if (track) {
        #if UNITY_EDITOR
        FindObjectOfType<GvrEditorEmulator>().enabled = true;
        #endif  // UNITY_EDITOR

        #if (UNITY_ANDROID || UNITY_IOS) && !UNITY_EDITOR
        VRDevice.DisableAutoVRCameraTracking(Camera.main, false);
        #endif  // (UNITY_ANDROID || UNITY_IOS) && !UNITY_EDITOR

        //cardboardHead.GetComponent<GvrHead>().trackPosition = true;
        //cardboardHead.GetComponent<GvrHead>().trackRotation = true;
    } else {
        #if UNITY_EDITOR
        FindObjectOfType<GvrEditorEmulator>().enabled = false;
        #endif  // UNITY_EDITOR

        #if (UNITY_ANDROID || UNITY_IOS) && !UNITY_EDITOR
        VRDevice.DisableAutoVRCameraTracking(Camera.main, true);
        #endif  // (UNITY_ANDROID || UNITY_IOS) && !UNITY_EDITOR

        //cardboardHead.GetComponent<GvrHead>().trackPosition = false;
        //cardboardHead.GetComponent<GvrHead>().trackRotation = false;
    }
}

UPDATE 2017.11.29 The above code won't work because VR has changed to XR. Check: https://docs.unity3d.com/ScriptReference/XR.InputTracking-disablePositionalTracking.html

Upvotes: 0

Wictor94
Wictor94

Reputation: 21

I just found how to disable the head tracking on the current version of Google VR: GVR Unity SDK v1.10.0.

The way to do it is adding the GvrHead Script to the GvrViewerMain Prefab. After this you can make a simple code to access the head tracking, which is controlled by the GvrHead Script. 

    GameObject.Find ("VRPlayer").GetComponent<GvrHead> ().trackRotation = false;
    GameObject.Find ("VRPlayer").GetComponent<GvrHead> ().trackPosition = false;

Write this code on a trigger or event, or wherever you want, to disable the head tracking.

This code find the attribute public bool trackRotation = true; and public bool trackPosition = true; on the GvrHead and change de bool to false.

To understand why this code lines enterely disable the headtracking, take a look at the GvrHead script.

To change back a enable the Headtracking change again the bool value of the GvrHead Script with the same type of code.

    GameObject.Find ("VRPlayer").GetComponent<GvrHead> ().trackRotation = true;
    GameObject.Find ("VRPlayer").GetComponent<GvrHead> ().trackPosition = true;

The Script and prefab came by deffault in the GVR Unity SDK package.

Example

I used it for a trigger object. When the player look right to the object, the code runs.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class StopHeadTrack : MonoBehaviour, IGvrGazeResponder {
public Animator anim;

public void OnGazeEnter () {
    GameObject.Find ("VRPlayer").GetComponent<GvrHead> ().trackRotation = false;
    GameObject.Find ("VRPlayer").GetComponent<GvrHead> ().trackPosition = false; 
}

Upvotes: 2

Francois Coulombe
Francois Coulombe

Reputation: 61

You can disable tracking for both position and rotation.

GameObject.Find("Head").GetComponent<CardboardHead>().trackRotation = false;

Upvotes: 0

se0kjun
se0kjun

Reputation: 550

Use OnHeadUpdated event

Following this code.

CardboardHead head;

void Start () {
    head = GameObject.Find("Head").GetComponent<CardboardHead>();
    head.OnHeadUpdated += Test_OnHeadUpdated;
}

private void Test_OnHeadUpdated(GameObject head_obj)
{
    head_obj.transform.rotation = Quaternion.identity;
    head_obj.transform.position = //the position when you stop cardboard;
}

Upvotes: 1

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