Data/LODs stop loading in (after using viewer for a few minutes) [nexus setup]

[cnr-isti-vclab]

Data/LODs stop loading in (after using viewer for a few minutes) [nexus setup]

[potenziani]

Hi @afr-git
most probably your application is hitting the internal 3DHOP limit for the Nexus cache (2M triangles are not so much for Nexus, but 4*8K images are a lot of data to stream).

To be sure of that try to include nexus.monitor.js to your project. Once done you should get a debug panel superimposed to the 3DHOP viewer (top-right corner):

If I'm right your issue should happen when the cache will use all the 512MB allocated. We have been a little bit conservative with this setup (also thinking to mobile devices), but this doesn't mean that you cannot customize it. You can find the functions useful to customize the Nexus setup marked as "new" in the just updated 3DHOP documentation.

For solving your issue you can exploit the setup function setNexusMaxCacheSize() and set the Nexus cache size as you prefer (for instance, use presenter.setNexusMaxCacheSize(2048*(1<<20)); to set the cache size limit to 2GB).

This should work for you. If not, please let us know!

[afr-git]

Hi @potenziani thank you for the quick reply on this issue. I did as you said, and the monitor showed the 512MB cache size was the limiting factor. I increased it to 2GB and problem is solved! Thank you for your help!

I'm not really familiar with how the viewer works behind the scenes but I wonder if it is possible to dynamically unload the cache so the viewer doesn't hit the expanded cache limit on huge models e.g. 100m+ tris with 10+ 8K maps?

[potenziani]

Hi @afr-git, this is exactly what Nexus already does. But the good result of this procedure strongly depends on the 3D model (and "simple" geometries with a lot of textures do not help our caching system). Moreover, it is not easy to find a balance between rendering quality and number of HTML requests that is perfect and adaptative depending on the devices' resources and network capabilities...
Anyway, we will continue to work on it! Thanks for reporting your issue and enjoy 3DHOP.