[Qt-interest] Fwd: GLEW library

[ami guru]

Helllo Oliver,

I have included the glew.h first.


Now it compiles fine. But now i get the following error saying that my
graphics card do not support OpenGL 2.0 and that is not true.


I have put the glewInit() inside the GLWidget constructor() and i think it
is wrong.


Where should i put the glewInit() ?


Inside initializeGL() / paintGL() / resizeGL()


Regards
Sajjad



Regards
Sajjad

---------- Forwarded message ----------
From: <Oliver.Knoll at comit.ch>
Date: Mon, Feb 23, 2009 at 10:15 AM
Subject: Re: [Qt-interest] GLEW library
To: qt-interest at trolltech.com


ami guru wrote on Sunday, February 22, 2009 6:54 PM:

> ..
> I have subclassed the glwidget and included the glew header file
> before the inclusion of QGLWidget

I also once compared the GLEW vs GLEE (http://elf-stone.com/glee.php) which
basically provide the same functionality and ended up using GLEE.

The following compiles without problems within my Qt OpenGL app:

// MyViewer.h
#include <GL/GLee.h>
...
#include <QtOpenGL/QGLWidget>

class MyViewer : public QGLWidget {
 ...
};

// MyViewer.cpp
#include <GL/GLee.h>
...
#include <QtOpenGL/QGLWidget>

MyViewer::MyViewer(QWidget *parent)
: QGLWidget(parent) {
 ...
}

Note that I always #included the GLee.h library first - maybe you can derive
some useful hints from that for your case (GLEW) as well. Or switch to GLEE
;) (which also provides "lazy-init", that is, you don't need to call any
"init" method explicitly - the only dependency on GLEE in your code is the
#include <GL/GLee.h> statement :)

Cheers, Oliver

--
Oliver Knoll
Dipl. Informatik-Ing. ETH
COMIT AG - ++41 79 520 95 22
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