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Hi Doug,
The main time consuming parts of ray tracing are building the acceleration structure, traversing rays through the acceleration structure, and then intersecting the actual primitives. For this to help Manta you'd probably want to minimize the communication back and forth from CPU to GPU, so you'd probably want to either do the build on the GPU or all of the traversal and primitive intersection on the GPU. I think the building might be more self contained and easier to see a speedup. The "Simpler and faster HLBVH with work queues" paper (https://dl.acm.org/citation.cfm?id=2018333) would be really cool to implement. You can probably get some code from https://code.google.com/p/slash-sandbox/wiki/NIH to help you out with parts of the code. There are other papers out there for how to build different acceleration structures. If you want something even easier you could just take the binned SAH BVH build from NIH and port it to Manta. While easier, it will still require some work and will also be very useful and interesting. In fact, I personally would find the regular binned SAH BVH builder to be more useful since then the BVH that gets built is identical to what Manta builds.

Thiago

On 3/26/13 8:59 AM, Doug Gelley wrote:

Hello,

For part of a senior project, my group would like to potentially increase 
manta performance by using CUDA and an NVIDIA GPU. We've already been able to 
use the CUDA makefiles written by Abe Stephens to compile manta with the nvcc 
compiler. What we would like to know is if there are any recommendations of 
code that can be pushed to the gpu. We are all new to parallelization and 
programming GPUs so any other advice would be greatly appreciated.

Thank you.

Best regards,
Doug Gelley

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• [Manta] GPU parallelization of manta, Doug Gelley, 03/26/2013
  • [Manta] Re: GPU parallelization of manta, Thiago Ize, 03/26/2013

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