[osg-users] Text Bounding Box Calculation

Daniel Emminizer, Code 5773 dan.emminizer at nrl.navy.mil
Mon May 14 08:30:04 PDT 2018

Hi Robert,

No problem.  I thought that might be the answer, but I figured it was worth passing along the example just in case.

Thanks for the fast response.

 - Dan

> -----Original Message-----
> From: osg-users [mailto:osg-users-bounces at lists.openscenegraph.org] On
> Behalf Of Robert Osfield
> Sent: Monday, May 14, 2018 11:18 AM
> To: OpenSceneGraph Users
> Subject: Re: [osg-users] Text Bounding Box Calculation
> Hi Dan,
> I haven't looked at the example code, currently don't have the time
> available for this right away, but will give a quick reply on the
> general topic.  With 3.6 osgText computes the view dependent matrices
> in a way that supports usage with multiple views, whereas 3.4 doesn't
> handle it well at all and can end up with wrong results going to the
> wrong views.  For view dependent text where the actual bounding box
> varies you are bit stuck on what value to use, so you have to cache
> the last valid matrix available.  This change can lead to differences
> between versions, but the actual bounding box isn't really determinate
> so I don't think there is one "correct" answer what can/should be be
> done here.
> Robert.

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