On 22 January 2018 at 13:58, Sebastian Messerschmidt <[email protected]> wrote: > the gl_ built-ins are not part of the core-profile and thus are not > available in every version of GLSL.
I'll add that osg_ModelViewMatrix etc. are designed as fallbacks when the gl_ versions aren't provided by GL-core profile and GLES2 - GLES3, If your are just using the default GL2 profile you can happily just use gl_ versions. If you want to write shader code portable between GL and GLES or beween GL and GL core profile then using the osg_ variants and telling the OSG to use these instead is done via osg::State::set*() methods as shown in the osgsimplegl3 example. Robert. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
