[osg-users] Slow optimization and OpenFlight

[Andreas Ekstrand]

Hi Robert,

Yes, I tried it now and OSG 3.4 loads the model in the same time as 
3.2.1 did. I found a few versions lying around here and concluded that 
something must have happened with the optimization between 3.5.1 where 
it works as before and 3.5.6 where it stalls.

I'll keep digging but please let me know if you find something out.

Regards,
Andreas


On 2017-11-17 17:35, Robert Osfield wrote:
> Hi Andreas,
>
> Did you try OSG-3.4.x?  I'm wondering about when the regression in
> performance might have happened.
>
> I have downloaded the file and will have a look.
>
> Robert.
>
> On 17 November 2017 at 16:14, Andreas Ekstrand
> <andreas.ekstrand at remograph.com> wrote:
>> Hi,
>>
>> I'm still struggling with migrating from old OSG 3.2.1 to the latest
>> developer release, now 3.5.8.
>>
>> I stumbled upon a rather serious performance issue here. When loading an
>> OpenFlight model with a large number of polygons, the optimization carried
>> out in the OpenFlight plugin is unacceptably slow in 3.5.8. It seems the
>> culprit is MergeGeometryVisitor.
>>
>> Here is an example with 150 000 polygons, it takes about 12s to load in
>> osgviewer 3.2.1 here and what feels like forever to load in 3.5.8:
>> https://www.dropbox.com/s/lmapv0iatn20d1q/house_150k.flt
>>
>> Has anyone seen this before? Any ideas how I can get it to behave like
>> before?
>>
>> Regards,
>> Andreas
>>
>>
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