POVray, beowulf, etc.

Srihari Angaluri srihari at mpi-softtech.com
Fri Oct 17 15:34:42 EDT 2003


Jim,
   Not sure if you came across the parallel ray tracer application 
written using MPI. This does real-time rendering.

http://jedi.ks.uiuc.edu/~johns/raytracer/

Jim Lux wrote:
> I'm aware of some MPI-aware POVray stuff, but is there anything out 
> there that can facilitate something where you want to render a sequence 
> of frames (using, e.g., POVray), one frame to a processor, then gather 
> the images back to a head node for display, in quasi-real time.
> 
> For instance, say you had a image that takes 1 second to render, and you 
> had 30 processors free to do the rendering.  Assuming you set everything 
> up ahead of time, it should be possible to set all the processors 
> spinning, and feeding the rendered images back to a central point where 
> they can be displayed as an animation at 30 fps (with a latency of 1 
> second)
> 
> Obviously, the other approach is to have each processor render a part of 
> the image, and assemble them all, but it seems that this might actually 
> be slower overall, because you've got the image assembling time added.
> 
> I'm looking for a way to do some real-time visualization of modeling 
> results as opposed to a batch oriented "render farm", so it's the 
> pipeline to gather the rendered images from the nodes to the display 
> node that I'm interested in. I suppose one could write a little MPI 
> program that gathers the images up as bitmaps and feeds them to a 
> window, but, if someone has already solved this in a reasonably facile 
> and elegant way, why not use it.
> 
> 
> James Lux, P.E.
> Spacecraft Telecommunications Section
> Jet Propulsion Laboratory, Mail Stop 161-213
> 4800 Oak Grove Drive
> Pasadena CA 91109
> tel: (818)354-2075
> fax: (818)393-6875
> 
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