Inverted stereo in `360-photos.html´ (device dependent?)

[Mikael-Lovqvist]

When media/textures/chess-pano-4k.png is loaded it is using mode stereoTopBottom but it seems it should use stereoBottomTop. I tested this by adding this to skybox.js Mikael-Lovqvist@b4e88cb and then testing it like so Mikael-Lovqvist@99e2bbe

This was tested on an Oculus Quest 2, I saw there were earlier mentions of inversion and the jpeg was replaced with a corrected png, could this be device dependent?

[alfski]

The chess-pano-4k.png (Right on top, Left on bottom) is stereo inverted on a Quest 1 as well.
The older chess-pano-4k.jpg (Left on top, Right on bottom) displays correctly.

The normal convention is "stereoTopBottom" (Left on top, Right on bottom).
I'd just go back to the older reference mage?
(additionally the original jpeg is only 2.5Mb vs 20Mb for the swapped .png!)

[Mikael-Lovqvist]

I think there is a certain completeness if the API used in the sample supports all four ways (top/bottom, bottom/top, left/right and right/left) but ultimately someone from this project will have to make a decision. To just fix it by changing the image feels slightly wrong to me in case you for whatever reason want to break "normal convention" (if there even is such a thing). Just my two cents!

[mrxz]

I noticed the same issue while trying to use stereo-top-bottom with an Equirect layer. With the Meta Quest Browser on the Quest 3 the top-half gets shown in the right eye and the bottom-half in the left eye.

The chess-pano-4k.png file seems to have right on top and left on the bottom as well. It is used in two examples: 360 Photos and Equirect Layer, but it only renders correctly in the latter. With a Pico Neo3 Link both examples show inverted stereo.

So it seems that the Meta Quest browser renders stereo-top-bottom inverse and the chess-pano-4k image got incorrectly inverted in this commit: 071895b

[vincentfretin]

Tested with the changes in #215 to fix the image for top to be the left eye,
Meta browser version 38.2.0.13.53.728503412 and OS version 76.1024, stereo-top-bottom still wrongly shows the top to the right eye.

[vincentfretin]

I also tested the Equirect Video example with

         <option value="https://oculus-mp4.s3.amazonaws.com/immersive+video+8K+for+Oculus+Browser/everestvr_6.2k_30s_180_TB_h264_crf27_CREDIT_JON_GRIFFITH-injected.mp4"
          data-video-width=3100 data-video-height=6200 data-video-layout="stereo-top-bottom" data-video-angle=180 data-video-fps=30>
          stereo-top-bottom 180 3100x6200 30fps
         </option>

It also wrongly shows the top to the right eye.

The Media layer example with the same video is correct, showing the top to the left eye.
So XRMediaBinding.createEquirectLayer with stereo-top-bottom is working properly but XRWebGLBinding.createEquirectLayer with stereo-top-bottom has the issue of wrongly showing the top to the right eye.