[osg-users] culling / bounding calculation for shader scaled geometries

[Trajce Nikolov NICK]

Hi Christoph,

there is something like setCullingActive(bool) in the interface of the Node
classes

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On Thu, Mar 28, 2019 at 2:16 PM Christoph Dohmen <christoph.dohmen at cae.de>
wrote:

> Hi all,
>
> I need to display textured items in a pixel-constant size even on zooming.
> For my implementation I use the position as vertices and store the size in
> the normals. The vertex shader handles it all corrrectly and the image is
> shown in a constant size.
>
> Unfortunately these items are culled if the position is outside the
> viewport. That's bad :-(
>
> I tried to use setInitialBound() with a maximum area to define the
> bounding box to prevent these items from being culled away. But instead of
> keeping the items on screen this results in scaled items!
>
> What other way could I go to prevent the items from beeing culled? Maybe I
> have to read back the vertices somehow?
>
> Thank you!
>
> Cheers,
> Christoph
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=75742#75742
>
>
>
>
>
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-- 
trajce nikolov nick
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