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Re: [Manta] Re: manta


Chronological Thread 
  • From: Ingo Wald <ingowald@gmail.com>
  • To: Brian Budge <brian.budge@gmail.com>, "manta@sci.utah.edu" <manta@sci.utah.edu>
  • Subject: Re: [Manta] Re: manta
  • Date: Sun, 23 Dec 2007 01:12:44 -0800


    > for the viewer?  My own kd-tree ray tracer without sse is about the
    > same
    > speed as tte DynBVH that you guys have, but I would guess that your
    > kd-tree
    > is a good deal faster.

Hi Brian,

I actually doubt it is ;-).
I've written the SSE'd kd-tree traverser and kd-SAH builder (assuming the one in manta is the one I wrote for Thiago's project...), but it certainly isn't faster than DynBVH (how could it !?).
I'm also a bit surprised that your _single-ray_ kd-tree is as fast as DynBVH, which would be _very_ strange indeed (in theory, "perf(SSE packet/frustum kd-tree) > perf(single-ray kd-tree)" and "perf(dynbvh) > perf(SSE kd-tree)", so your message confuses me a bit.

Can you elaborate a bit on
a) what traverser you actually use, and
b) what performance you're getting with dynbvh ? anything close to the numbers we reported in the paper ?

Ingo




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