What is the diference between "GLvoid" and "void"?

Graphics and GPU Programming Programming

Started by xernobyl July 27, 2003 02:18 PM

13 comments, last by xernobyl 20 years, 8 months ago

122

Author

July 27, 2003 02:18 PM

I am starting do to something, and I found nothing saying the diference between GL vars and the standard vars... Like GLfloat, and float, GLvoid and void, etc... Can you help me?

deathtrap

364

July 27, 2003 04:08 PM

the following is taken straight from the gl.h header file.

typedef unsigned int GLenum;typedef unsigned char GLboolean;typedef unsigned int GLbitfield;typedef signed char GLbyte;typedef short GLshort;typedef int GLint;typedef int GLsizei;typedef unsigned char GLubyte;typedef unsigned short GLushort;typedef unsigned int GLuint;typedef float GLfloat;typedef float GLclampf;typedef double GLdouble;typedef double GLclampd;typedef void GLvoid;

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xernobyl

122

Author

July 27, 2003 04:11 PM

There''s no diference...
lol
ok
rigth...
duh...
moving on, nothing to see here...

Seraphim

156

July 27, 2003 05:25 PM

They do this to make sure the code can be ported easily.
For example a float on a 32-bit computer has a different memory size than a float on a 64-bit computer.

So when you port your code from a 32-bit machine to a 64-bit machine the only needed change is in the OpenGL header definitions to achieve the exact same results as on the 32-bit computer.

Or at least I assume that''s the reason..