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Andrew (ZA)
(@atb69)
Eminent Member
Joined: 2 years ago
Posts: 23
21/06/2020 9:37 am  

Hi all

There's a few topics about this

I had some issues recently with Motion Compensation. It just wouldn't work and was bouncing.

I ended up moving my Tracker to the back of my seat so it was only picked up by the Rear Lighthouse (VivePro & STeamVR)

Anyway in finding this out I found a new OpenVr motion compensation on Github and XSimulator

Its much easier to setup and has some adjustments that can be made for filtering etc

Check it out below: (Uninstall the old one first)

https://www.xsimulator.net/community/threads/openvr-motioncompensation.14576/

https://github.com/openvrmc/OpenVR-MotionCompensation/wiki/FAQ


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mariachi
(@michael-mariachera1-net)
Eminent Member
Joined: 2 years ago
Posts: 39
29/06/2020 9:37 am  

Hi Andrew,

great post, I will try this tool, even I do not have any issues with motion compensation anymore.

I've had in the past, as long both lighthouse sensors were alligned fasing each other.

But after thinking about lateral (angle) and logitudinal (distance) detection quality from movement of the rig ( tracker), I tried a more "offset" version of placement.

 

Now one is located in the front right corner (as before), pointing towards tracker, if rig is in parked position.

The other one was moved from rear left corner to almost middle of the left wall, also facing toward tracker in parked position.

The center lines of both lighthouse sensores are now more ore less mating at the tracker in an angle of 75° (+/-)

So any movement of the tracker will always be a combination of lateral (angle) and longitudinal (distance) detection.

 

Michael


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Steffen
(@slaze_xe)
CEO Admin
Joined: 3 years ago
Posts: 168
29/06/2020 7:33 pm  

Is is any different from the version we recommend? https://manual.fasetech.com/books/motion-compensation-%28valve-index-htc-vive-%29/page/motion-compensation-guide

Or any easier? I just need to install, choose the tracker and press motion compensation.

I will have to try it as soon as possible, always nice having alternatives. 

Remember placement of the light houses are the most important and having the tracker fastened as close to the HMD as possible. 

Steffen Hansen | CEO | FaseTech


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mariachi
(@michael-mariachera1-net)
Eminent Member
Joined: 2 years ago
Posts: 39
29/06/2020 7:49 pm  

That's my mount. Right behind the head, with USB power.

DSC02969

 

Michael


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Andrew (ZA)
(@atb69)
Eminent Member
Joined: 2 years ago
Posts: 23
30/06/2020 7:47 am  
Posted by: @slaze_xe

Is is any different from the version we recommend? https://manual.fasetech.com/books/motion-compensation-%28valve-index-htc-vive-%29/page/motion-compensation-guide

Or any easier? I just need to install, choose the tracker and press motion compensation.

I will have to try it as soon as possible, always nice having alternatives. 

Remember placement of the light houses are the most important and having the tracker fastened as close to the HMD as possible. 

Hi Steffen. It seems to allow some settings to allow for different scenarios, especially if the tracker is vibrating, it can be filtered.

I had quite a few issues recently with the original Emulator in that whenever i hit "Apply" it wouldn't engage. So it wasn't cancelling the motion and then the VR would bounce all over the place. Then you have to exit, restart, reload etc.

Since my Tracker and Lighthouses haven't moved I wasn't sure if it was something else.

The new OVRMC is a work in progress, and not perfect either. I've had a few times when it loses the tracker and resets mid race, which causes chaos. However I cant seem to replicate when it happens.

Give it a try when you can, and let us know what you think.


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Steffen
(@slaze_xe)
CEO Admin
Joined: 3 years ago
Posts: 168
01/07/2020 4:14 pm  

Sounds very cool, looking forward to being able to try it. 

I have had some strange issues as well, but most of the time a restart would do it. Are you using set zero? i recommend having it on default instead.

Steffen Hansen | CEO | FaseTech


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Andrew (ZA)
(@atb69)
Eminent Member
Joined: 2 years ago
Posts: 23
07/07/2020 11:46 am  

UPDATE: 

So I did some further testing and even went back to OPenVR to test it again. Had similar problems.

Seems my specific issue is because of my mounting of the Tracker. Its not as solid as Michaels and I also had Velcro Straps over it.

This seemed to be causing some of the "Flickering" in VR, probably from vibrations and movement of the Tracker.

Ive remounted using a Wrist Strap. This gives it full view of both Lighthouses. (Pic below)

HOWEVER, it still vibrates/moves a bit. This is where Ive found the new OVRMC to work really well.

Ive set LPF to 0,3 and EMA Samples to 30. This seems to allow for some movement, and there is Zero flickering on VR

If anything its another option for us to use.

IMG 3426


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