koobas.hobune.stream
[VR][VIVE] allow rotation only ?
Hi, I'm making a VR game with VIVE, and I want the view to be locked at a certain position, but still allowed to look around. In other words, I want to simulate Occulus behaviour with a VIVE setup :p
At first sight I thought it would be piece of cake, but I'm fairly stuck in my project, I tried a lot to modify the SteamVR scripts, to apply "(local)position = Vector3.zero every Updates", nothing works...
I did not found this issue on unity's forum so If you have any ideas, let me know, thanks a lot :)
I finally figured out a solution: Moving the camera rig to offset the head position, but it only works if you use localPosition, there is my script: (put it directly on [CameraRig])
public class CameraRigStabilizer : MonoBehaviour {
private Vector3 InitialPos;
private Vector3 hmdPos;
public GameObject HMD;
public Transform CameraPos;
void Start ()
{
InitialPos = transform.position;
}
// Update is called once per frame
void LateUpdate ()
{
//hmdPos = HMD.transform.position; Can't work in world position
//transform.position = InitialPos - hmdPos; for some reason
hmdPos = HMD.transform.localPosition;
transform.position = CameraPos.position - hmdPos;
}
}
HMD = camera (head) , CameraPos = Where you want your head to be
hope that will help someone :)
UnityEngine.XR.InputTracking.disablePositionalTracking = true;
Dear @Kerbiriou ,
I have a similar task, (but I have to discard Z_rotation) and your script looks like a great place to start. Anyway, I can't reproduce your solution even without any changes. Can you share a demo scene (work37 gmail com) or explain more verbosely how to use your scipt?
I've attached it to [CameraRig], HMD = camera (head) , CameraPos = I've made an empty GameObject in the Root of the hierarchy. Maybe something here is wrong
Thanks!
Hi, Indeed, your task seems pretty similar, but I have no H$$anonymous$$D right now to make tests, so I will only tell you what may be a solution. I observed weird behaviours between the Vive and Unity space. However, I think you only have to reset your hmd (head) z-rotation every frame. In other words, you may save your current z-rotation in a variable, let's say zRot. Then you write into a LateUpdate (to make sure everything happened) :
hmd.rotation.z=zRot;
I even think you can modify my script by replacing "position" by "rotation.z"
Also, you may have issues using the world rotation, if yes, try using the local rotations, a bit like I did :)
That's it, I may have forgotten some "transform" or something, I did not do any unity programs for a while, and I forgot a lot about rotations in Unity, sorry about that.
Hope it was usefull though :)
Dear @Kerbiriou ,
I tried to use your script for allowing rotation only. (I put this script on [CameraRig], and I attached Camera(head) object as HMD, empty gameObjcect as CamerPos)
But, camera still move around.
Do you have any idea to solve this problem?
Thanks!
I'm working on Unity 5.5.
