[osg-users] problems with checking for OpenGL extensions

[Steffen Kim]

Hi,

I've got another problem with using OpenGL-code in connection with 
OpenSceneGraph.

I have an OpenGL-API that I use in my OSG-application. This API won't work when 
there are some required OpenGl-extensions missing. Instead it will list the 
missing extensions. 
In my application it does just that because it cannot find some of them.

Strange thing is that when running the example-programs that came with the API 
outside of my program everything works just fine. Also according to OpenGL 
Extension Viewer my hardware should support these features.

I read that there is also an OSG-function to test on extensions but since I 
have no influence on the API I have to find out why its internal checks fail 
when used in my application.

Does anyone have an idea why these problems possibly occur and what I have to 
change or do about it to make it work?
I thought the provided extensions just depend on the graphics driver... is this 
wrong? Could there be some conflicts with the libraries I'm using?

If this already has been answered somewhere I'm sorry. I read through some 
posts concerning extensions but nothing seemed to fit to my problem.

Thanks in advance,
Steffen


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Re: [osg-users] problems with checking for OpenGL extensions

[Robert Osfield]

Hi Steffen,

To find out what extensions the OSG is seeing enable verbose debugging via:

   export OSG_NOTIFY_LEVEL=DEBUG
   osgviewer cow.osg

Then it'll list, among lots of other stuff, the extensions supported.

Robert.

On Thu, Jul 24, 2008 at 5:59 PM, Steffen Kim [EMAIL PROTECTED] wrote:
 Hi,

 I've got another problem with using OpenGL-code in connection with 
 OpenSceneGraph.

 I have an OpenGL-API that I use in my OSG-application. This API won't work 
 when there are some required OpenGl-extensions missing. Instead it will list 
 the missing extensions.
 In my application it does just that because it cannot find some of them.

 Strange thing is that when running the example-programs that came with the 
 API outside of my program everything works just fine. Also according to 
 OpenGL Extension Viewer my hardware should support these features.

 I read that there is also an OSG-function to test on extensions but since I 
 have no influence on the API I have to find out why its internal checks fail 
 when used in my application.

 Does anyone have an idea why these problems possibly occur and what I have to 
 change or do about it to make it work?
 I thought the provided extensions just depend on the graphics driver... is 
 this wrong? Could there be some conflicts with the libraries I'm using?

 If this already has been answered somewhere I'm sorry. I read through some 
 posts concerning extensions but nothing seemed to fit to my problem.

 Thanks in advance,
 Steffen


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 Jetzt neu! Schützen Sie Ihren PC mit McAfee und WEB.DE. 30 Tage
 kostenlos testen. http://www.pc-sicherheit.web.de/startseite/?mc=00

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 osg-users@lists.openscenegraph.org
 http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org

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