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strange cardboard behaviour

28 September 2016 18:04 #12236
Hi guys!
We're creating a VR version of the Terraemotus (Reggia di Caserta) project.
We're experiencing a strange behaviour in the 2015 cardboards: we have an excessive distortion of the objects in the scene (i.e. pictures on the wall have wrong aspect ratio) and the depth of the whole scene appears very flattened.
We're using the hmd_conf window in the app to set the correct parameters of carboard and phone screen, but we have not been able to fix this issue (at the moment chrome browser mobile is our testbed).
Have you got any hint for us to force the app behaviour for cardboard 2015?
TY very much!
http://www.cineca.it/en
28 September 2016 19:01 #12238
Thank you for feedback.
These is a bug and it will be fixed to the upcomming release (16.09).
Blend4Web Team
kirill@blend4web.com
28 September 2016 20:40 #12242
wow, ok! ty! so.. is the bug already fixed in the 16.09 early developer preview?
http://www.cineca.it/en
29 September 2016 11:10 #12247
It is fixed in the release candidate (16.09).
Blend4Web Team
kirill@blend4web.com
29 September 2016 20:20 #12262
ok, we tried it and the aspect ratio is now fixed!
but a problem is still there because our app can't use correctly the hmd parameters.
When we set in the hmd_conf window the cardboard 2015 profile [0.34, 0.55] and then we put the correct screen size, then save and reload, the view is still too much distorted.
If we set the distortion to [0,0] (using hmd_conf window) the view is really better and there is only a small distortion in the corners

You can try with this temporary link
https://hpc-forge.cineca.it/files/visit_3Dmodels_VR/public/terraemotus_1609/terremotus/terremotus_hmd.html

Any thoughts?
Luigi
http://www.cineca.it/en
29 September 2016 21:59 #12266
We also noticed that the distortion shader definitely kills the fps…
Hoping that WEBVR will be better optimized in the future!
http://www.cineca.it/en
30 September 2016 15:52 #12294
Hi Luigi, we are currently looking at this.
Development Lead | Twitter
30 September 2016 15:58 #12295
still too much distorted.

What do you mean? Does correction distort a picture too much?

If we set the distortion to [0,0] (using hmd_conf window) the view is really better and there is only a small distortion in the corners

I can't reproduce. Could you send a screenshot?

We also noticed that the distortion shader definitely kills the fps…
Hoping that WEBVR will be better optimized in the future!

Did you tryed to install Chromium build or Firefox Nightly Build (v51)? There should be a performance boost.
Blend4Web Team
kirill@blend4web.com
 
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