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ChristophHaag / SteamVR-OpenHMD

SteamVR plugin for using OpenHMD drivers in SteamVR
Boost Software License 1.0
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Oculus CV1 image distortion #24

Open JulianGro opened 5 years ago

JulianGro commented 5 years ago

As I haven't been able to get any more information on this issue, I will just open this Issue here without much more information.

Using the Oculus Rift CV1 with SteamVR in Direct Mode has the image distorted. SteamVR-OpenHMD reports distortion parameters being set in the log. According to the OpenHMD source code, these are the right parameters for the Rift.

I haven't found an application than I can try direct mode with and I don't know how you are supposed to use any application with extended mode.

The distrotion isn't gamebreaking, but clearly visible, so I am not even sure if the distortion values that come with OpenHMD are right.

JulianGro commented 5 years ago

Just set up a bounty for who ever manages to get this fixed, as this is somewhat important to me. https://www.bountysource.com/issues/72293469-oculus-cv1-image-distortion

ChristophHaag commented 5 years ago

I haven't found an application than I can try direct mode with and I don't know how you are supposed to use any application with extended mode.

Hey. In the meantime I wrote down a little bit of what I know about extended mode in the OpenHMD wiki: https://github.com/OpenHMD/OpenHMD/wiki/Extended-Mode

Specifically for the CV1 someone made an issue and it turns out that the display only works while an OpenHMD app (or SteamVR-OpenHMD) is running. https://github.com/OpenHMD/OpenHMD/issues/224

Unfortunately I still can't say anything about the Oculus Rift distortion, because I don't have one.

Just a suggestion, but if you are interested in testing more stuff, you can try our (Collabora) OpenXR runtime which supports direct mode and among others uses OpenHMD drivers: https://gitlab.freedesktop.org/monado/monado (simple compilation instructions) Though right now there are only few OpenXR examples and no real applications you can run on it right now.

JulianGro commented 5 years ago

The display turns on no problem for me in extended mode. I just have no idea how I am going to get an application to fullscreen on that. I did https://gitlab.com/lubosz/xrgears before, though I couldn't get it to run. If your are up for it and maybe not too far away, I could lend you my Oculus to take a look yourself.

Szalacinski commented 5 years ago

The distortion is very slight, correct? Do objects appear slightly smaller when at the center?

JulianGro commented 5 years ago

I wouldn't call it very slight. Thought it is not very bad either. I haven't really noticed objects being smaller in the center (will look out for that when I have the headset on next). So the distrortion is so bad that I have had dizzyness and headaches when I started using the oculus with this. I have gotten used to it though, to the point where I only have problems with orientation (and immersion). What I specificly notice is that staight lines are not straight in the oculus anymore. They seem straight in the center area, but warp shortly after getting further out. I guess I should try to take a picture of it, so people can actually see what I am talking about.

JulianGro commented 5 years ago

I tried my best to take some pictures: IMG_20190621_163641 IMG_20190621_163726 IMG_20190621_163731

You can clearly see everything being somewhat warped. Here a (weirdly squished) screenshot made with SteamVR for comparison: 20190621163757_1 It might be squished, but you can still see that all the edges are supposed to be straight, rather than warped.

gadLinux commented 4 years ago

I can confirm this issue. I use to play EliteDangerous and I cannot because distortion. It seems that something is doing wrong in the center. It's like a ripple and I can see it when I move the head. Just strange. It happens on SteamVR at all times on direct mode.

gadLinux commented 4 years ago

I managed to make a couple of videos

http://owncloud.level2crm.com/index.php/s/oGkd5ZJLbfqQ6Ag http://owncloud.level2crm.com/index.php/s/kLwqy6tKnwMf7LE

I hope you can see it. In stereo the effect is bigger...

thaytan commented 3 years ago

I just fixed CV1 lens distortion parameters in my positional tracking branch. See https://github.com/thaytan/OpenHMD/issues/22

JulianGro commented 3 years ago

Unfortunately I don't have a Rift to test this on anymore. But I guess this can still be closed once the new parameters make it into upstream.