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Abe is correct - the persistent object stuff might be a good way to do this. I am hoping to have it done in ~ 1 week or so. However, the first round of it may not solve the performance problem because the first file store will be XML-based and XML is not known for speed.

Steve


On Sep 21, 2007, at 10:23 AM, Abe Stephens wrote:

Steve: What is the status of the Manta persistence/serialization branch?

I had written some code back before the triangle mesh class was introduced to write a DynBVH out to disk. It might port forward with all the new changes, but if the serialization branch is right around the corner it might be a better idea to use that instead.

I doubt that the faster builder will eliminate the need to store prebuilt trees. The fastest BVH builder at RT07 takes about 10 minutes to preprocess the 777. Ten minutes is a long time to wait, especially if a prebuilt tree can be memory mapped from /dev/shm and used immediately.

Abe

On Sep 20, 2007, at 5:35 PM, <thiago@cs.utah.edu> <thiago@cs.utah.edu> wrote:

There currently is no support for that, but it should be rather easy to add. I personally have no plans on adding that since I'd rather spend my time porting over a fast bvh builder (Ingo Wald's RT07 paper) which negates that need.
Thiago.

-----Original Message-----

From:  Dirk Reiners <dirk@infiscape.com>
Subj:  [Manta] Saving BVH information?
Date:  Thu Sep 20, 2007 4:07 pm
Size:  324 bytes
To:  manta@sci.utah.edu


        Hi Everybody,

we're using some medium-sized models (Stanford Repository) using triangleviewer
for testing our system right now, and building the BVH takes quite a bot of time
every time it's run.

Is there a way to export the model with BVH information from Manta to speed up
loading for repeated runs?

Thanks

        Dirk

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• [Manta] Saving BVH information?, Dirk Reiners, 09/20/2007
  • <Possible follow-up(s)>
  • Re: [Manta] Saving BVH information?, thiago, 09/20/2007
    • Re: [Manta] Saving BVH information?, Abe Stephens, 09/21/2007
      • Re: [Manta] Saving BVH information?, Steven G. Parker, 09/21/2007

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