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);
}



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/


According to this (http://stackoverflow.com/questions/2197223/where-are-the-opengl-header-files-located-on-macosx) page, the header files for OpengGL should be in the Headers directory, but it doesn't exists.

8714

Here is also a screenshot of the error.

8715

[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.