Installing GLUT

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Level 1

89 points

Installing GLUT

Hi
I'm a second year Computer Science student and am at the beggining of my first Computer Graphics unit. Currently I'm using Microsoft Visual Studio to write my code using Windows XP on a MacBook but am finding it quite slow when running my code. I thought moving to Xcode might be a good idea but don't know how to install GLUT on it. I've read through the instructions that come with the download but don't understand them. If anyone could help me it would be really useful!

Thanks a lot
Ben

1.83GHz Core Duo MacBook Mac OS X (10.4.8)

Posted on Oct 27, 2006 2:48 PM

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Answer 1

Oct 28, 2006 10:27 PM in response to Ben Atkinson

You don't need to install GLUT. The GLUT framework is installed with Mac OS X. It is located at System/Library/Frameworks. All you have to do is add the GLUT framework to your Xcode project.

Mac OS X (10.4)

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Answer 2

Oct 29, 2006 1:32 PM in response to Ben Atkinson

In System/Library/Frameworks, there should be over 70 framework folders, including folders for the Carbon, Cocoa, and GLUT frameworks. If the GLUT framework is not there, do a Spotlight search for GLUT.framework. If nothing shows up in the search, I don't know what to tell you. I don't know why the GLUT framework wouldn't be installed on your Mac.

Mac OS X (10.4)

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Answer 3

Ben Atkinson Author

Level 1

89 points

Oct 30, 2006 7:13 AM in response to Mark Szymczyk

Oh yeah, sorry, was looking in the wrong folder 🙂.
Perhaps I've done this wrong but I thought i'd added GLUT using #include <gl/glut.h>. This works using Visual Studio, does Xcode do things differently?
Thanks very much

Ben

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Answer 4

Oct 30, 2006 9:37 PM in response to Ben Atkinson

if #include <gl/glut.h> doesn't work, try the following:

#include <GLUT/glut.h>

Mac OS X generally uses the following form when including header files in system frameworks:

<FrameworkName/HeaderName.h>

Mac OS X (10.4)

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Answer 5

Ben Atkinson Author

Level 1

89 points

Oct 31, 2006 2:31 AM in response to Mark Szymczyk

Thanks a lot that got that bit working perfectly!
For some reason though I get an error in my main function saying "error: '::main' must return 'int'". This was never a problem when using Visual Studio. I've tried getting around it by declaring another variable 'tempInt' and returning it at the end but it doesn't seem to like that either.
The only other error I'm now getting is with <windows.h>, just need to find the Mac equivalent to that!

Thank you very much for your help, you've been very useful! 🙂

Ben

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Answer 6

confusion

Level 1

120 points

Oct 31, 2006 8:05 AM in response to Ben Atkinson

you need to declare the main function like this:

int main(int argc, char *argv[]){

...
return someint
}

this is the standard declaration which allows you to return an error code if something unexpected happens. The Microsoft compiler might be more forgiving in that respect.
What do you need windows.h for? Maybe you can use functions from stdlib.h instead.

Daniel

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Answer 7

Ben Atkinson Author

Level 1

89 points

Oct 31, 2006 8:24 AM in response to confusion

What i've got at the moment is:

void main(int argc, char **argv)
{
glutInit(&argc,argv);

glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
glutInitWindowSize(width, height); //set window size
glutInitWindowPosition(xpos, ypos); //set window position

glutCreateWindow("Game Screen");

init();
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutIdleFunc(spinDisplay);
glutKeyboardFunc(keys); //add keyboard callback
glutSpecialFunc(special); //add callback for the function keys

glutMainLoop();
}

I tried adding "return tempInt;" at the end to see if it would fix it but it still had the same problem. Is there anything i'm missing here?

I was using <windows.h> for Sleep(), i've now replaced it with <unistd.h> so thats one thing out of the way 🙂.

Thanks very much for your help

1.83GHz MacBook Core Duo Mac OS X (10.4.8)

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Answer 8

Ben Atkinson Author

Level 1

89 points

Oct 31, 2006 8:55 AM in response to confusion

Thanks, I'm very slowly getting somewhere!
That now works fine but I'm getting 2 new errors that aren't shown on the main screen but when I click on the message that says there are 2 errors at the bottom right of the screen it shows undefined symbols errors followed by a long list of gl and glut commands 😟.
Sorry for asking so many questions, this is the first time I've used Xcode and I have no idea what I'm doing!

Thanks, Ben

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Answer 9

Ben Atkinson Author

Level 1

89 points

Oct 29, 2006 7:38 AM in response to Mark Szymczyk

Thanks a lot for your help.
Having looked in the Frameworks folder I can't find anything to do with GLUT, am I just being stupid here?!

Ben

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Answer 10

confusion

Level 1

120 points

Oct 31, 2006 8:31 AM in response to Ben Atkinson

void main(int argc, char **argv)

just change this line to

int main(int argc, char **argv)

and insert

return 0

at the end.

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Answer 11

confusion

Level 1

120 points

Oct 31, 2006 9:58 AM in response to Ben Atkinson

Could you put the source file somewhere on the internet s.th. we can have a look at it? Then it is easier for us to understand the problem 🙂

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Answer 12

Ben Atkinson Author

Level 1

89 points

Nov 2, 2006 3:26 AM in response to confusion

The code i've got at the moment is here - http://docs.google.com/View?docid=ddhhn9v9_1dcxfcd
Thanks very much for your help

Ben

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Answer 13

Ben Atkinson Author

Level 1

89 points

Nov 7, 2006 2:01 PM in response to Ben Atkinson

Hi
Any idea why this shouldn't work? It would be really great to get it working so I no longer have to go down the Parallels and Visual Studio route!
Thanks a lot for your help

Ben

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