Opengl in linux

[AndrewGene]

I am trying to run the simplest of opengl programs...

#include <gl/libglut.h>
void mydisplay(){
glClear(GL_COLOR_BUFFER_BIT);
glBegin(GL_POLYGON);
glVertex2f(-0.5, -0.5);
glVertex2f(-0.5, 0.5);
glVertex2f(0.5, 0.5);
glVertex2f(0.5, -0.5);
glEnd();
glFlush();
}
int main(int argc, char** argv){
glutInit($argc, argv);
glutCreateWindow("simple");
glutDisplayFunc(mydisplay);
glutMainLoop();
}
...
I am typing this into the terminal
cd to the directory of the .cpp file and then type...

sudo gcc SimpleSquare3.cpp -lglut

...it however is giving me these errors...
SimpleSquare3.cpp:1:25: error: gl/libglut.h: No such file or directory
SimpleSquare3.cpp: In function ‘void mydisplay()’:
SimpleSquare3.cpp:3: error: ‘GL_COLOR_BUFFER_BIT’ was not declared in this scope
SimpleSquare3.cpp:3: error: ‘glClear’ was not declared in this scope
SimpleSquare3.cpp:4: error: ‘GL_POLYGON’ was not declared in this scope
SimpleSquare3.cpp:4: error: ‘glBegin’ was not declared in this scope
SimpleSquare3.cpp:5: error: ‘glVertex2f’ was not declared in this scope
SimpleSquare3.cpp:9: error: ‘glEnd’ was not declared in this scope
SimpleSquare3.cpp:10: error: ‘glFlush’ was not declared in this scope
SimpleSquare3.cpp: In function ‘int main(int, char**)’:
SimpleSquare3.cpp:13: error: ‘$argc’ was not declared in this scope
SimpleSquare3.cpp:13: error: ‘glutInit’ was not declared in this scope
SimpleSquare3.cpp:14: error: ‘glutCreateWindow’ was not declared in this scope
SimpleSquare3.cpp:15: error: ‘glutDisplayFunc’ was not declared in this scope
SimpleSquare3.cpp:16: error: ‘glutMainLoop’ was not declared in this scope

any help would be appreciated thanks. I have looked up how to link to a library and read several articles but my system doesn't have the libglut.h anywhere or libglut.a/libglut.so which is what i believe i am looking for.

[olejorgen]

I think that should be #include <gl/glut.h>

[AndrewGene]

I got the same error message. Anything else? Maybe we should verify my files again??? What should i have in order to compile this thing?

[nrs]

#include <GL/glut.h> *
&argc *

[AndrewGene]

That worked thank you so much!!! I've been trying for hours to fix this all day. I can't believe that it was that simple.

Now, not that it matters, but can I have this image of a square show up while i'm running compiz-fusion?? It blips in when running CF but it isn't constant. I have to turn it off to see it full time (it is really not a big deal but I am just curious).

[fct]

Compiz fusion is still unstable and prone to have errors left. Plus depending on the graphics card and the driver you're using, you could hit some quirks.

For example, with the current driver for intel GPUs it's not quite pleasant to play videos using xv while running compiz at the same time.

So if you want to check your GL program, it's a good idea to turn off compiz-fusion.

[Wybiral]

Yeah, my computer doesn't show any OpenGL surface when I'm running Beryl or Compiz... It's just a solid white window.

[AndrewGene]

Alrighty, thanks guys. That's what i figured.

[genux05]

I had a similar problem whilst testing out the glut hello world test program, and encase this helps anyone else.

aptitude install freeglut3-dev

and then

gcc -o helloworld helloworld.cpp -lGL -lglut

the -l means the library to include is the GL (graphics library) and also the lowercase glut graphics library.

[Drone022]

#include <GL/glut.h> *
&argc *

I've never seen this before, can someone explain how this solved the problem?

Just curious.