GLubyte definition

simasimon · 10-11-2007, 12:06 PM

hi
i need yo use a data structure defined as GLubyte. apparently GLubyte is defined in <GL/glu.h> or <GL/glut.h> in windows. someone knows which would be the equivalent to this library in linux? thanx
on C

dmail · 10-11-2007, 12:33 PM

GLubyte is not a data structure it is a (integral)type which is an unsigned 8 bit integer, which on most modern platforms is unsigned char. This type is not defined by glut but by GL itself.

quote taken from the red book chapter 1
http://www.glprogramming.com/red/chapter01.html

Quote:

Include Files

For all OpenGL applications, you want to include the gl.h header file in every file. Almost all OpenGL applications use GLU, the aforementioned OpenGL Utility Library, which requires inclusion of the glu.h header file. So almost every OpenGL source file begins with

#include <GL/gl.h>
#include <GL/glu.h>

If you are directly accessing a window interface library to support OpenGL, such as GLX, AGL, PGL, or WGL, you must include additional header files. For example, if you are calling GLX, you may need to add these lines to your code

#include <X11/Xlib.h>
#include <GL/glx.h>

osor · 10-11-2007, 12:33 PM

Quote:

Originally Posted by simasimon

hi
i need yo use a data structure defined as GLubyte. apparently GLubyte is defined in <GL/glu.h> or <GL/glut.h> in windows. someone knows which would be the equivalent to this library in linux? thanx
on C

On my system, it is typedefed in /usr/include/GL/gl.h. This file is #included by /usr/include/GL/glu.h and by /usr/include/GL/glut.h. So basically, you use the same headers.

If you #include <GL/glu.h> or #include <GL/glut.h> you should link to libglut (which may be provided by freeglut or glut). If you #include <GL/gl.h> directly (and don’t #include the others), you should link to libGL (provided by various packages, including mesa and probably your graphics card driver).

simasimon · 10-11-2007, 12:48 PM

thanx for your answers