→ update!

Rigel pointed out to me that the original example code was not portable. For portable code using opengl, SDL_opengl.h should be included instead of GL/GL.h and friends.

However, that would mean a few less bytes for sourcecode. So, to make it easier for all of you. I will allow you to include a header which i provide, which includes a few commonly used header files.

→ basic rules

The rules are mostly the same as last year,

1. Your source code should be less than (or equal to) 4096 bytes.
2. Only ANSI C and C++ are allowed.
3. You have to use SDL
4. No other API calls allowed.
5. No external data files, just code.
6. Sound is allowed.
7. ESC quits.
8. You can use the g.h or s.h files provided on the example page.

→ detailed rules

Some of these rules may seem a bit harsh, but please keep in mind this is an open source compo. Most of these rules deal with getting your code to be portable - the voters would like to be able to run your entry on Win32, GNU/Linux, Mac OSX, etc..

1. The size limit for all the source code in the project is 4096 bytes, this does not include makefiles/projects or whatever you use to build it. Whitespace (space/tab/newlines) is not counted for the size limit, however the `real' size of your source files should not grow beyond 8192 bytes.
    
   The real size of your source files is the size you see with dir or ls -l (this should be <= 8192 bytes).
   You can use something like this to calculate the size without counting whitespace (should be <= 4096 bytes):

          cat source.c | perl -pe 's/\s//g' | wc -c
     

   Using compiler switches to add source code at compile time is strictly prohibited (that means no funky -D tricks in the Makefile guys).
   
2. You are not allowed to use compiler extensions, only ANSI C (or ANSI C99) and C++ is allowed.
3. You have to use LibSDL to get a video buffer to play with :). This cuts down on overhead for the window init and msg loop and it is portable too.
   note: only stock SDL is allowed - do NOT use any of the additional libraries).
4. You cannot use any OS specific libraries or API calls - i.e. No Direct3D or other Windows API calls (and no X11 either). OpenGL (gl and glu, but not glut) is allowed to access 3D hardware.
5. No data files are allowed.
6. Sound is allowed with SDL audio (do not use /dev/dsp or something like that directly).
7. Pressing escape should quit the intro.
8. You can use g.h or s.h from the example page to avoid having to include a bunch of headers yourself.