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[Manta] Re: Re: Re: Re: two frame lag?


Chronological Thread 
  • From: David E DeMarle < >
  • To:
  • Subject: [Manta] Re: Re: Re: Re: two frame lag?
  • Date: Tue, 27 Apr 2010 18:45:11 -0400
So I'm getting back to this now.

I could not think of a way to get the image I ask for out of manta's
two stage pipeline without calling render twice. The caption here and
in the paper imply that Manta's two stage pipeline is configurable,

   http://mantawiki.sci.utah.edu/manta/index.php/Manta_architecture

but I couldn't figure out how to reconfigure it other than by changing 
RTRT.cc.

Attached is my proposed change. It doesn't speed up vtkManta by two as
I hoped (likely because the render threads are idle while Display is
happening) but it does speed it up significantly. I don't think it
will appreciably slow anything else down either.

MantaBenchmark -threads 8 -triangles 1000000 -fuzziness 0.0 -noChanges
prechange rendering rate = 52.6fps
postchange rendering rate = 70.1fps

Let me know if you've got a better alternative, or I will check mine
in later this week.

thanks,

David E DeMarle
Kitware, Inc.
R&D Engineer
28 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-371-3971 x109

Attachment: patch
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