Hi Robert, sorry, I didn't explain clearly enough what I ment. I have written complex shaders with a lot of functionality. They work perfect. Jet me give an example: In my scene I have objects with and without textures. Is there any way for the shader itself to detect this difference? If not, I have to make two versions of the shaders just beeing different in the one line with the basic texture and load them accordingly?
So my question is: can I querry "uniform sampler2D textureMap" inside the shader if it was set by my program or not? I couldn'tr find anything like thar in the docs. Many thanks in advance - Werner - On Saturday 11 September 2010 12:15:57 Robert Osfield wrote: > Hi Werner, > > On Fri, Sep 10, 2010 at 1:39 PM, Werner Modenbach > > <[email protected]> wrote: > > Does anybody know if it is possible inside a shader program to querry if > > a "uniform sampler2D" was set by uniform attribute or if it contains > > legal data? > > The OSG should report a warning when shaders fail to link and don't > have the required uniforms. > > There isn't any way for the OSG or OpenGL to know what "legal data" is > for you shaders, this is all down to you - if you put garbage in > you'll get garbage out. > > Robert. > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- TEXION Software Solutions TEXION GmbH - Rotter Bruch 26a - D 52068 Aachen - HRB 14999 Aachen Fon: +49 241 475757-0, Fax: +49 241 475757-29, web: http://www.texion.eu Geschäftsführer/Managing Director: Werner Modenbach _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
