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Once upon a time the precursor to Manta became cluster friendly (dirt, by Dave Demarle), so it certainly can be done. Steve and I have talked about porting similar stuff to Manta, but in general you basically have to either replicate the data on all nodes (so cluster's just end up being like an SMP with a slower interconnect) or you need a kernel module to let you do a page based DSM (I wrote such a kernel module, but I doubt any system administrator likes the idea of installing untrusted modules onto a shared cluster).


On Dec 4, 2007, at 1:31 PM, Ingo Wald wrote:

AFAIK, the only "usealble" ray tracer that supports clusters is OpenRT, but it's obviously not open source.

The "intel stuff" is not a well-defined term, there are several ray tracers circulating within intel (BTW: in case the news hasn't dissipated, yet, I'm not at intel, too), and we could probably make one available for you for research purposes. It doesn't support clusters, though, and is more of a research vehicle for the researchers themselves than anything like a useful engine for end users in the sense of openrt or manta. That might eventually change, but not in the immediate future -- and it's certainly not open source, either ;-).

As such, I'm pretty sure Manta is your best bet if you can live w/o cluster support; OpenRT if you can live w/o open source requirements.

Cheers,

Ingo



Dirk Reiners wrote:

   Hi All,

I'm trying to get a better overview of the RTRT field. Does anybody have some links to other Open Source RTRT systems? Any that are actually alive? Is the Intel stuff available somewhere? Anything that supports clusters?

There are bunch of old RTRT demos around, but nothing very general. The RTRT mailing list on Yahoo also looks pretty dead, the most alive thing I could find is ompf.org (http://ompf.org/forum/viewforum.php?f=8 ), and of course the Manta list. ;)

Here's a list of links I found. I haven't looked at the actual sources yet, but at least they're available:

Source for Arauna: http://rt07.raytracing.nl/ Source for yaCort: http://liris.cnrs.fr/~bsegovia/yacort/
John Stone's Tachyon:    http://jedi.ks.uiuc.edu/%7Ejohns/raytracer/
Old RTRT Demo:        
http://homepages.paradise.net.nz/nickamy/raytracer/raytracer.htm

Does anybody have experience with any of those?

Thanks

   Dirk

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• [Manta] Other Open Source RTR systems?, Dirk Reiners, 12/04/2007
  • Re: [Manta] Other Open Source RTR systems?, Ingo Wald, 12/04/2007
    • Re: [Manta] Other Open Source RTR systems?, Solomon Boulos, 12/04/2007

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