Stereo Eye Index for video

[glenwrhodes]

I have an over/under stereo video that I'm playing in a scene, but for some reason the image is coming in as monoscopic 360.  I suspect it's because Unity isn't properly setting the unity_StereoEyeIndex in the shader, which is needed to deteremine which part of the video to render to which eye.

 

Is there a workaround for this? Has anyone had any luck getting this kind of thing to work?

 

Thanks!

[dario]

Hi Glen,

 

I've managed to get stereo 360 video playback on the Vive Focus working with Unity's VideoPlayer by using their https://github.com/Unity-Technologies/SkyboxPanoramicShader which allows you to specify over/under.

 

Let me know if that works for you,

Dario

[dario]

 

 

[glenwrhodes]

Unfortunately this isn't actually working as stereo.  This is similar to what I had working, but the problem is the top image of the over/under is being sent to both eyes.

 

In the shader, there's this code to determine which portion of the source video to render into each fragment.

 

            if (_Layout == 0) // No 3D layout                o.layout3DScaleAndOffset = float4(0,0,1,1);            else if (_Layout == 1) // Side-by-Side 3D layout                o.layout3DScaleAndOffset = float4(unity_StereoEyeIndex,0,0.5,1);            else // Over-Under 3D layout                o.layout3DScaleAndOffset = float4(0, 1-unity_StereoEyeIndex,1,0.5);

It's dependent on unity_StereoEyeIndex being either 1 or 0.  In the SDK it appears to always be 0, no matter which eye the pixels are rendering to.  It appears that both eyes are being sent the same half of the video.

 

 

[dario]

Currently, unity_StereoEyeIndex  is not integrated with the Wave SDK.

 

We will have a separate solution in the next update, and will announce here as soon as it's available.

 

best,

Dario

[ArjenVeenhuizen]

HI @Dario

At the risk of bumping an old thread. We just ran into the same issue on WaveVR v3.0.2. 

unity_StereoEyeIndex appears to be 0 always, regardless of whether multi-pass or single pass rendering is used. I scanned through all release notes but failed to find any reference to a "solution in the next update". Is this part of the new v3.1.1 beta? Your help is greatly appreciated. 

Arjen

@Tony PH Lin @Cotta

 

[dario]

This has been already added to WaveVR

 

@ArjenVeenhuizen

[ArjenVeenhuizen]

HI @DarioFirst of all; thanks for reporting back on this issue. We have updated to Wave VR v3.1.6 beta but from our tests it looks like the unity_StereoEyeIndex field is still always zero regardless of multi-pass/single-pass rendering. We are using Unity 2018.3.0f2. Would this fix by any chance only work on another/newer version of Unity? Or is there some other setting we might be missing? Or, is there an alternative and efficient approach we can use to detect whether we are rendering to the left or right eye?

Thanks!

@Cotta @Tony PH Lin

[ArjenVeenhuizen]

Thanks @Cotta for the detailed response. Much appreciated. We will check it out and report back.

[shanks]

Hi @ArjenVeenhuizen

I have the same problem : unit_StereoEyeIndex is always 0，Do you have any new discoveries or other solutions。