<![CDATA[Why glTransformFeedbackVaryings not Exists in QT?]]>Hi!

I´m using QT to develop OpenGL aplications but i cannot use the glTransformFeedbackVaryings function to get my transformations feedback.

Looking at the function specification, this function start to be a part of core profile from 4.1 version of OpenGL, but in all QOpenGLFunctions Objetcs , many of this functions simply not exists including the 4.1,4.2 and 4.3 objects.

How can i solve it?

Kind Reagards.

]]>https://forum.qt.io/topic/41814/why-gltransformfeedbackvaryings-not-exists-in-qtRSS for NodeSun, 17 May 2026 14:13:45 GMTSun, 25 May 2014 10:39:24 GMT60<![CDATA[Reply to Why glTransformFeedbackVaryings not Exists in QT? on Mon, 26 May 2014 12:12:45 GMT]]>Ok, i will try.
Thanks so much for your help.

Regards.

]]>https://forum.qt.io/post/229878https://forum.qt.io/post/229878Mon, 26 May 2014 12:12:45 GMT<![CDATA[Reply to Why glTransformFeedbackVaryings not Exists in QT? on Mon, 26 May 2014 00:12:39 GMT]]>Yes ... try using the wrangler library inside your project. Pure OpenGL calls are limited to OpenGL 1.1 (in Windows environment), so to extract pointers to the hardware-implemented functions of your GPU you should make the "GLEW":http://glew.sourceforge.net/ part of your project.

]]>https://forum.qt.io/post/229810https://forum.qt.io/post/229810Mon, 26 May 2014 00:12:39 GMT<![CDATA[Reply to Why glTransformFeedbackVaryings not Exists in QT? on Sun, 25 May 2014 23:58:50 GMT]]>In fact all my Objects that use OpenGL Commands are being inherited from QOpenGLFunctions Object , including my Widget all the code are working fine, but , now i´m trying collect the transformed vertices from the OpenGL pipeline, But when i try use this function it doesnt find anything...return to me not find the function...

Kind Regards.

]]>https://forum.qt.io/post/229807https://forum.qt.io/post/229807Sun, 25 May 2014 23:58:50 GMT<![CDATA[Reply to Why glTransformFeedbackVaryings not Exists in QT? on Sun, 25 May 2014 13:34:24 GMT]]>Are you using the wrangler library for extracting OpenGL function pointers?

]]>https://forum.qt.io/post/229776https://forum.qt.io/post/229776Sun, 25 May 2014 13:34:24 GMT