[osg-users] Unwanted culling in 3.6.4 vs 3.5.1

[Anders Backman]

That is so strange..!

> osgversion
OpenSceneGraph Library 3.6.4

Captured a short video of the issue:
 osgviewer --window 0 0 1024 768 osg_3.6.4_culled.osgt

https://gofile.io/?c=A6LCw6

What on earth could be the difference here? Have tested on several
computers (only Windows though).
Windows 10, NVida GeForce card.

Also, how it works in 3.5.1:

">"osgversion
OpenSceneGraph Library 3.5.1

osgviewer --window 0 0 1024 768 osg_3.5.4_not_culled.osgt
https://gofile.io/?c=i2Ssx0

On Thu, Jan 9, 2020 at 2:00 PM Voerman, L. <l.voerman at rug.nl> wrote:

> Hi Anders,
> I did have a quick look, but I can't see any unwanted culling, nor do I
> get the warnings you write about.
> tried versions 3.6.3 3.6.4 and 3.6.5 on windows with
> OSG_NOTIFY_LEVEL=INFO
> osgviewer osg_3.6.4_culled.osgt
>
> Looking in the file I see a lot of empty osg::Text nodes - I guess that
> causes an empty bounding sphere in the specific version of osg you have.
> Laurens.
>
> On Thu, Jan 9, 2020 at 1:19 PM Anders Backman <andersb at cs.umu.se> wrote:
>
>> Another issue I discovered with 3.6.4 is that we now suddenly get
>> unwanted culling.
>> At first it looks like a small feature culling thing (which we disable at
>> global level with:
>>
>>   // Don't do small feature culling
>>   osg::CullStack::CullingMode cullingMode =
>> m_viewer->getCamera()->getCullingMode();
>>   cullingMode &= ~(osg::CullStack::SMALL_FEATURE_CULLING);
>>   m_viewer->getCamera()->setCullingMode(cullingMode);
>>
>>
>> However, this does not look like a small feature thing to me at all.
>> Actually, it culls even when you get close to the objects.
>> Attached are two osgt-files.
>>
>> One is saved from OSG 3.5.1 (works as intended).
>>
>> Second one is saved from OSG 3.6.4 (where we get the unwanted culling).
>>
>>
>> If you use a later version of OSG (3.6.4) the one from 3.6.4 generates
>> lots of warnings:
>>
>> CullVisitor::apply(Geode&) detected NaN,
>>     depth=nan, center=(0 0 7.125),
>>     matrix={
>>         -nan(ind) -nan(ind) -nan(ind) -nan(ind)
>>         -nan(ind) -nan(ind) -nan(ind) -nan(ind)
>>         -nan(ind) -nan(ind) -nan(ind) -nan(ind)
>>         0.187249 -0.470484 -6.20285 1
>>
>> whereas the one from 3.5.1 does not.
>>
>> Anyone give me a hand on this? I am really stuck.
>> I was first totally into small feature culling, trying to dig up old code
>> where people was trying to disable small feature culling on subgraphs etc.
>> But that is not the issue here.
>>
>> Any suggestion would help. I tried to make the scene as small as possible.
>>
>> I tried to attach the files, but it made the message too big.
>> Instead I shared the files using gofile: https://gofile.io/?c=M5xPmU
>> There are two files osg_3.5.1_not_culled.osgt
>> and osg_3.6.4_culled.osgt
>>
>> Thanks,
>> Anders
>>
>>
>> --
>> __________________________________________
>> Anders Backman, HPC2N
>> 90187 Umeå University, Sweden
>> anders at cs.umu.se http://www.hpc2n.umu.se
>> Cell: +46-70-392 64 67
>> _______________________________________________
>> osg-users mailing list
>> osg-users at lists.openscenegraph.org
>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>>
> _______________________________________________
> osg-users mailing list
> osg-users at lists.openscenegraph.org
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>


-- 
__________________________________________
Anders Backman, HPC2N
90187 Umeå University, Sweden
anders at cs.umu.se http://www.hpc2n.umu.se
Cell: +46-70-392 64 67
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/attachments/20200109/58062813/attachment.html>