glActiveTextureARB crash

hm, you're wondering why your programs crashes when you call a NULL-function? ;)
dunno about glee, but you usually have to get the proc address before you can call the function.

like that (when you're using windows):

PFNGLACTIVETEXTUREARBPROC glActiveTextureARB = (PFNGLACTIVETEXTUREARBPROC)wglGetProcAddress((LPCSTR)"glActiveTextureARB");

yeah I was wondering the same thing but I change it because I saw a sample here at the forums.

Btw the way you said dosent work, still crashes :(

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

perhaps?

The GLee homepage says that all you have to do is include Glee.h and link with GLee.lib, and everything should work. No initialization required.

that was the first thing I tried, include the header, lib is linked, but still dosent work, I get glActiveTextureARB' : undeclared identifier if I dont initialize.

try it without the ARB postfix

Have u defined the type PFNGLACTIVETEXTUREARBPROC before using it?

like this :

typedef void (APIENTRY * PFNGLACTIVETEXTUREARBPROC) (GLenum target);

after that u need to define variable glActiveTextureARB like what u did :

PFNGLACTIVETEXTUREARBPROC glActiveTextureARB= NULL;

after that did u init the varible like what cmf said :

PFNGLACTIVETEXTUREARBPROC glActiveTextureARB = (PFNGLACTIVETEXTUREARBPROC)wglGetProcAddress((LPCSTR)"glActiveTextureARB");

btw if u used this way u don't need to include any extension lib,
so u need to do this process for each function u need to use it.

Even If Im using Glee? that was the point of using it... not having to initialize everything everytime I use it.

no u can put all defintion in one header file and make ur one macros and then init
it once per program so it isn't big problem .

Quote:

Original post by juanmanuelsanchez that was the first thing I tried, include the header, lib is linked, but still dosent work, I get glActiveTextureARB' : undeclared identifier if I dont initialize.

Don't declare any extension functions yourself. Just #include GLee.h and make sure you've got an OpenGL context before you call any GL functions or use any extension querying variables.

To be extra safe, you can GLeeInit() after you've got your GL context and check whether it returned GL_TRUE (success) or GL_FALSE (failure). If it returns GL_FALSE then you should check the error with GLeeGetErrorString()

Before using an extension function, you should check that your drivers support it by using the GLee querying variable for that extension (e.g. GLEE_ARB_MULTITEXTURE).