OpenGL Issue

[Wnt2bsleepin]

I am having a problem using OpenGL. I included opengl in the pro file and put the include <QtOpenGL> but it is telling me that it cannot find OpenGL/gl.h

#include "openglpanel.h"
#include <QtOpenGL>
 
//Define the methods up top.
void OpenGLPanel::initializeGL(){}
void OpenGLPanel::resizeGL(int x, int h){}
void OpenGLPanel::paintGL(){}
void OpenGLPanel::changeSides(int s){}
void OpenGLPanel::changeRadius(double r){}
 
OpenGLPanel::OpenGLPanel(QWidget *parent) :
    QGLWidget(QGLFormat(QGL::SampleBuffers), parent)
{
    sides = 3;
    radius = 1.0;
 
}
 
void OpenGLPanel::initializeGL()
{
    qglClearColor(qtPurple.dark());
 
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_CULL_FACE);
    glShadeModel(GL_SMOOTH);
    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHTO);
    glEnable(GL_MULTISAMPLE);
    static GLgloat lightPosition[4] = {0.5, 5.0, 7.0, 1.0};
    glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);
}

#include "openglpanel.h"
#include <QtOpenGL>
 
//Define the methods up top.
void OpenGLPanel::initializeGL(){}
void OpenGLPanel::resizeGL(int x, int h){}
void OpenGLPanel::paintGL(){}
void OpenGLPanel::changeSides(int s){}
void OpenGLPanel::changeRadius(double r){}
 
OpenGLPanel::OpenGLPanel(QWidget *parent) :
    QGLWidget(QGLFormat(QGL::SampleBuffers), parent)
{
    sides = 3;
    radius = 1.0;
 
}
 
void OpenGLPanel::initializeGL()
{
    qglClearColor(qtPurple.dark());
 
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_CULL_FACE);
    glShadeModel(GL_SMOOTH);
    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHTO);
    glEnable(GL_MULTISAMPLE);
    static GLgloat lightPosition[4] = {0.5, 5.0, 7.0, 1.0};
    glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);
}

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I am running OSX and as far as I know, OpenGL is installed by default. Any help is appreciated.

[alrawab]

add this line to your pro file

QT += opengl

[Wnt2bsleepin]

Already in there.

[wysota]

You are missing OpenGL development files for your system. This has nothing to do with Qt.

[Wnt2bsleepin]

How do I install the dev files?

OpenGL should be installed by default, but I suppose the dev files are not.

[wysota]

How do I install the dev files?

I have no idea. I'm sure that if you ask this question to your favourite web search engine, it will come up with a number of solutions.

[alrawab]

How do I install the dev files?

OpenGL should be installed by default, but I suppose the dev files are not.

http://cacs.usc.edu/education/cs596/ogl_setup.pdf
http://www.opengl.org/

[Wnt2bsleepin]

http://cacs.usc.edu/education/cs596/ogl_setup.pdf
http://www.opengl.org/

Those work with XCode. I compiled and ran the one example and it worked fine. Both OpenGL and Glut are installed.

How do I get it to work with QtCreator? Is there a way to define where the headers/frameworks are?

[wysota]

Is there a way to define where the headers/frameworks are?

Yes. You can use the INCLUDEPATH variable in your project file.

[Wnt2bsleepin]

Apparently a .framework file also contains its own folders, so linking to those directly doesn't work

INCLUDEPATH += /System/Library/Frameworks/

INCLUDEPATH += /System/Library/Frameworks/

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According to this page, the header files for OpengGL should be in the Headers directory, but it doesn't exists.

Pu5QsTe.png

Here is also a screenshot of the error.

9jtntWk.png

[ChrisW67]

According to that same page:

OpenGl is included <OpenGL/gl.h> rather than the more expected <gl/gl.h> on other platforms.

and I think you will see an OpenGL folder in that framework... what's in it?

[Wnt2bsleepin]

It's not a directory. It appears to be a binary file of some sort.

[wysota]

It's not a directory. It appears to be a binary file of some sort.

Your own screenshot claims it's an alias to something (probably some other bundle that contains those development files).

[Wnt2bsleepin]

Your own screenshot claims it's an alias to something (probably some other bundle that contains those development files).

Not familiar with that. Is there a way to find out where it goes?

[wysota]

My knowledge of MacOSX is very limited, I'm afraid I can't help you.