[osg-users] How to select OSGB tiles for current zoom?

[Chris Hanson]

Those max screen diameter values are using by projecting the diameter of
the bounding sphere (usually encoded in any Group-derived nodes) through
the modelview/projection matrix to assess its on-screen extent in pixels.
If it is above or below the threshold defined by the max screen diameter
field, that triggers a change in the selection of children.

On Wed, Sep 18, 2019 at 12:55 PM <shlem at netvision.net.il> wrote:

> Hi
> I wrote my own renderer based on DirectX.
> Everything goes nice except one issue.
> How I decide to show the some tile/node or its children regarding to
> current zoom level?
> Does each tile/none have some hints? (like 3mx files for example, that
> have  MaxScreenDiameter field)
> Thanks in advance
> Leonid Shikhmatov
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> osg-users at lists.openscenegraph.org
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>


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