UI on Controller: delay in movement.

Hi everyone.

I'm currently working on a VR project for the HTC Vive where I use a palette type menu like this one parented on my left controller. My menu works fine but the UI follow it's controller parent with a slight delay in a smooth follow fashion. Note that I also display 3D meshes in some buttons but they aren't affected by this delay.

I looked it up and find this thread mentioning UI should have a follow function with LateUpdate, which I tried instead of parenting but without success.

Last test is parenting all my UI on a game object, and having it lateupdate-follow my controller: with that solution I still have the delay but on the whole thing meaning my UI and models don't intersect with movement. If I make that gameobject the new controller mesh, I have a plan B but the delay issue remains.

Has anyone encountered this problem? I tried searching but the keywords are very common. My theory is that the controllers are already managed in lateupdate and prevent the UI position to be set after them but I didn't find any menus where I could set this properly.

Thanks to anyone that can help.

 

I dug a little more and found these too pages but it isn't looking good.

https://steamcommunity.com/app/358720/discussions/0/520518688939942166/
https://forum.unity3d.com/threads/d...vas-to-a-tracked-object-using-steamvr.358131/

 

I don't have a vive to test this but my suggestion would be to attach a script to the controller to figure out the difference from last to current position (May have to test Update vs LateUpdate) and apply the offset to the transform of the canvas you wish to parent. (May want anchor the canvas to an empty holder gameobject so you can switch out menus)
LMK your results please

 

Thanks for your reply.

The issue is, there is no actual delay in the worldspace. It comes after, during the rendering and that's not something I have access to. :-/

 

I think there's some wizardry to apply the movement of the controllers as late as possible that doesn't work with a Canvas. My solution is to not parent the canvas to the controller. Instead, I use an anchor point that is a child of the controller. A simple script sets the position of the GameObject, that is the parent of the Canvas, manually to be the same as the anchor point.

 

Go into the SteamVR Pose Updater and change the method from PreCull to PostUpdate. Worked for me.

 

That works for me.

Change OnPreCull to LateUpdate() in SteamVR_UpdatePoses.cs file.

btw, my untiy version is 5.4.4f1.

Thank you very much.

 

SteamVR_UpdatePoses.cs is not being used anymore. Problem still exists unfortunately.

 

Any news on this in the last years? we have this problem too

 

Hi, there how did you make the palette type menu as shown in the comment above? I have also the same requirement like this so can you please share your work if possible?