Steam VR Plugin : Reset Position and orientation

Hello,

I'm currently working with Steam VR Plugin for Unity and i'm converting my whole project for the fantastic HTC Vive Pre and forward.

UNFORTUNATELY i didn't figured out the equivalent to :
" UnityEngine.VR.InputTracking.Recenter(); "

I tried SteamVR.instance.hmd.ResetSeatedZeroPose(); without any success...
Seems on the web i'm not alone but didn't found any answer.

Does anyone can help ?

 

This problem may be Unity5.3.3 Bug

 

Code (CSharp):

1.     public KeyCode reOrient;
2.  
3.     void Update()
4.     {
5.         if (Input.GetKeyDown(reOrient) == true)
6.         {
7.             Valve.VR.OpenVR.System.ResetSeatedZeroPose();
8.  
9.             //transform.parent.localEulerAngles -= transform.localEulerAngles + transform.parent.localEulerAngles;
10.         }
11.         //transform.parent.localPosition = -transform.localPosition;
12.     }

Valves reset seems like the way to go, but it does nothing I can detect. Use the commented lines and remove/comment the ResetSeatedZeroPose line, make sure the camera (origin) is a child of something that looks at your centre. And dont forget to set a reOrient key in the inspector (This code can create strange offsets when reorienting)

 

alert @Timothee35 and others...

Actual miracle solution is here:

http://forum.unity3d.com/threads/openvr-how-to-reset-camera-properly.417509/#post-2792972

thanks to TODD-WASSON

 

I spent a lot of time looking for a answer on this. Tried all of the options on this thread and the miracle one without success. Looked like several of the SteamVR/Valve and native solutions stopped working after a recent update. Eventually wrote this script which took care of it to my liking.

This script will allow a reset of the SteamVR camera rig to align with a transform representing the desired head position in the scene. Attach to any GameObject in the scene. Useful for seated experiences like cockpits.

Code (CSharp):

1. using UnityEngine;
2.  
3. public class ResetSeatedPosition : MonoBehaviour {
4.     [Tooltip("Desired head position of player when seated")]
5.     public Transform desiredHeadPosition;
6.     private Transform steamCamera;
7.     private Transform steamController;
8.  
9.     // Update is called once per frame
10.     void Update () {
11.  
12.         if (Input.GetKeyDown(KeyCode.Space))
13.         {
14.             if (desiredHeadPosition != null)
15.             {
16.                 ResetSeatedPos(desiredHeadPosition);
17.             }
18.             else
19.             {
20.                 Debug.Log("Target Transform required. Assign in inspector.");
21.             }
22.        
23.         }
24.     }
25.  
26.     private void ResetSeatedPos(Transform desiredHeadPos){
27.  
28.         //find VR Camera and CameraRig transforms in scene
29.         steamCamera = FindObjectOfType<SteamVR_Camera>().gameObject.transform;  
30.         steamController = FindObjectOfType<SteamVR_ControllerManager>().transform;
31.  
32.         if ((steamCamera != null) && (steamController != null))
33.             {
34.             //{first rotation}
35.                 //get current head heading in scene
36.                 //(y-only, to avoid tilting the floor)
37.                 float offsetAngle = steamCamera.rotation.eulerAngles.y;
38.                 //now rotate CameraRig in opposite direction to compensate
39.                 steamController.Rotate(0f, -offsetAngle, 0f);
40.  
41.             //{now position}
42.                 //calculate postional offset between CameraRig and Camera
43.                 Vector3 offsetPos = steamCamera.position - steamController.position;
44.                 //reposition CameraRig to desired position minus offset
45.                 steamController.position = (desiredHeadPos.position - offsetPos);
46.  
47.                 Debug.Log("Seat recentered!");
48.             }
49.         else
50.             {
51.                 Debug.Log("Error: SteamVR objects not found!");
52.             }
53.     }
54. }
55.  

Turned out to be simpler than I expected. Hope it can save someone else the time!

Cheers,

Gerry

PS: Running Unity 2017.2

 

The solution @gstarch suggested is the way to go. It works both for Room Scale & Seated Experiences.

Some things to remember though:

• An important change is that the

  SteamVR_ControllerManager

  -script isn't attached to the

  [CameraRig]

  -prefab coming with the SteamVR-plugin anymore (in SteamVR version 1.2.3 and up).
  • This also means that the variable

    steamController

    is supposed to be set to the

    [CameraRig]

    -prefab coming with the SteamVR-plugin.
    
• How Unity.XR works:
  • The function

    UnityEngine.XR.InputTracking.Recenter();

    ONLY works for Seated/Standing Experiences, ie. it won't do anything if you have set up a Room Scale-experience.

Here's our modified version of @gstarch's solution. Works with

Unity 2018.3.0b11

&

SteamVR Version 1.2.3

Hope this helps someone!

Code (CSharp):

1. using UnityEngine;
2.  
3. public class PlayAreaController : MonoBehaviour
4. {
5.     [Tooltip("Desired head position of player when seated")]
6.     public Transform desiredHeadPosition;
7.  
8.     //Assign these variables in the inspector, or find them some other way (eg. in Start() )
9.     public Transform steamCamera;
10.     public Transform cameraRig;
11.  
12.     private void Update()
13.     {
14.         if (Input.GetKeyDown(KeyCode.Space))
15.         {
16.             if (desiredHeadPosition != null)
17.             {
18.                 ResetSeatedPos(desiredHeadPosition);
19.             }
20.             else
21.             {
22.                 Debug.LogError("Target Transform required. Assign in inspector.", gameObject);
23.             }
24.         }
25.     }
26.  
27.     private void ResetSeatedPos(Transform desiredHeadPos)
28.     {
29.         if ((steamCamera != null) && (cameraRig != null))
30.         {
31.             //ROTATION
32.             // Get current head heading in scene (y-only, to avoid tilting the floor)
33.             float offsetAngle = steamCamera.rotation.eulerAngles.y;
34.             // Now rotate CameraRig in opposite direction to compensate
35.             cameraRig.Rotate(0f, -offsetAngle, 0f);
36.  
37.             //POSITION
38.             // Calculate postional offset between CameraRig and Camera
39.             Vector3 offsetPos = steamCamera.position - cameraRig.position;
40.             // Reposition CameraRig to desired position minus offset
41.             cameraRig.position = (desiredHeadPos.position - offsetPos);
42.  
43.             Debug.Log("Seat recentered!");
44.         }
45.         else
46.         {
47.             Debug.Log("Error: SteamVR objects not found!");
48.         }
49.     }
50. }

 

This is just what I needed. Thanks.

 

It worked lika a charm!

 

I'm not sure what you are setting as the "Camera Rig"
I can make an object to be the "desiredHeadPosition" and I see the Players "VRCamera" to set as the "steamCamera"
but whats the rig? Is this something that has been removed in SteamVR 2.x (SDK 1.7.15) ?

 

To reset orientation I use the following:

Code (CSharp):

1.  
2.         public void ResetTracker()
3.         {
4.             StartCoroutine( Boresight() );
5.         }
6.  
7.         private IEnumerator Boresight()
8.         {
9.             activeCameraRig.transform.rotation = Quaternion.identity;
10.             yield return null;
11.  
12.             InputTracking.Recenter();
13.             yield return null;
14.  
15.             List<XRNodeState> states = new List<XRNodeState>();
16.             InputTracking.GetNodeStates( states );
17.             var head = states.Find( s => s.nodeType == XRNode.Head );
18.             if( head.TryGetRotation( out Quaternion orientation ) )
19.                 activeCameraRig.transform.rotation = Quaternion.Inverse( orientation );
20.         }
21.  

activeCameraRig is the top level transform on your VR rig.

Code (CSharp):

1.         private void Start()
2.         {
3.             switch( XRSettings.loadedDeviceName )
4.             {
5.                 case "Oculus":
6.                     activeCameraRig = Instantiate( OculusCameraRig );
7.                     break;
8.  
9.                 case "OpenVR":
10.                     activeCameraRig = Instantiate( ViveCameraRig );
11.                     break;
12.  
13.                 default:
14.                     break;
15.             }
16.             onCameraRigActive.Invoke( activeCameraRig );
17.         }
18.  

 

Thank you. That image helped clarify things as did the code. Unfortunately when I load from one scene to another the player is still facing the wrong direction in the new scene.

Edit: Silly me. I Just needed to turn the player prefab around.

P.P.S Edit … Turning the player prefab only works for going to the scene if I return to the previous scene The player will now be facing the wrong way in that scene.

 

Just in case someone is looking for this in 2020:
Valve.VR.OpenVR.Chaperone.ResetZeroPose(ETrackingUniverseOrigin.TrackingUniverseSeated);

Introduced by this update:
https://steamcommunity.com/app/250820/discussions/7/2794999486595715160/

 

Hi fgheorghe.
Thank you for posting that 2020 version.
I have given it a go but it resets the Y value as well and puts the floor up to eye level. I have to close and restart SteamVR every time to put the floor back at my feet again.
Would you have any experience on what to do to keep the Y setting?
Cheers,
Lins

 

Hi Lins, I am wondering if the Y setting changes due to player height settings in SteamVR, outside unity, or depending on your setup, if the camera needs to be a made a child of an empty object set at a desired height - this way if Y is reset to 0, and the camera’s parent is set to 1, then when the position gets reset it will be above the floor at Y 1. Hope this helps!

 

I think it was a mismatch of the SteamVR_Settings saying tracking space origin seated. When I set that to standing and then in the code set
ETrackingUniverseOrigin.TrackingUniverseSeated
to
ETrackingUniverseOrigin.TrackingUniverseStanding
then it keeps the floor at my feet. Even if I have set my room guardian to stationary or free draw etc. It always sets up as standing for SteamVR.