[OpenWalnut-Dev] OpenSceneGraph 3.2

[Mathias Goldau]

Thanks for your work on that. I suggest a new OW-Weekend for porting OW 
to OSG 3.2. If you need any additional help please let us know.

math


On 08/08/13 19:12, Sebastian Eichelbaum wrote:
> After some investigations I found these problematic issues with OSG 3.2:
>
> * setXYZBinding methods of Geometry have changed. They MUST be called AFTER setXYZArray, because they are shortcuts for getXYZArray().setBinding()
>
> * Geodes added to transparency bin are somehow strange now. It seems OSG disables depth comparison and depth write for these transparency bins
> --> causes all modules using blending and transparency to look strange
>
> * GL_BLEND in a geometries/geodes stateset seems not to work (why?)
>
> * There is no BIND_TO_PRIMITIVE anymore. This means we MUST change all codes using per primitive normals and colors. This sounds trivial at first, but it will cost some effort
> --> assume a cube. eight vertices, six faces. we often bound one normal for each face (bin-per-primitive). To use bind-per-vertex we need to duplicate all vertices, as a corner vertex is associated with 3 faces -> 3 normals.
>
> * deprecated_osg::Geometry is NOT the original osg::Geometry code. It is dereived from the new osg::Geometry and tries to "emulate" the old features. Problematic with this is, that the old bin-per-primitive arrays are dropped by this implementation AND you need to call fixDeprecatedData for every Geoemtry instance manually if you have set the geometry to a geode before setting the arrays.
> --> Problem: this seg-faults currently
>
>
> Ok thats it. I really hope the OSG Team fixes some issues. Never the less, there will be some work for us to get osg 3.2 compatible.
>
> Bye
> Sebastian
>
>
> On Thu, 08 Aug 2013, Sebastian Eichelbaum wrote:
>
>> Hi List
>>
>> Somehow all of a sudden, the OSG team has changed the functionality in their osg::Geometry class. Unfortunately, OpenWalnut will not compile currently with the changes made. The solution to this, as promised by the OSG team, is to use deprectaed_osg::Geometry. But this class segfaults when used. Several other promised features in the new Geometry class also do not work as expected.
>>
>> I assume that there are still several bugs in 3.2 and I recommend you to not update your OSG, until they are fixed and we migrated our code to the new Geometry class.
>>
>> Bye
>> Sebastian
>>
>> --
>> Dipl.-Inf. Sebastian Eichelbaum
>> Universität Leipzig
>> Institut für Informatik
>> Abteilung Bild- und Signalverarbeitung
>> PF 100920
>> D-04009 Leipzig
>> _______________________________________________
>> OpenWalnut-Dev mailing list
>> OpenWalnut-Dev at lists.informatik.uni-leipzig.de
>> http://lists.informatik.uni-leipzig.de/mailman/listinfo/openwalnut-dev
>>
>> Archive: http://lists.informatik.uni-leipzig.de/pipermail/openwalnut-dev/
>>
>

-- 
Universität Leipzig
Fakultät für Mathematik und Informatik
Institut für Informatik
Augustusplatz 10, 04109 Leipzig
Phone: +493419732283