glutGetWindowData - Man Page

OpenGLUT - window

#include <openglut.h>

void*
glutGetWindowData(void);

This function will return whatever

value is associated with the
current window
via glutSetWindowData(). This is

if you did not associate a pointer with your window. This can be useful in a situation where you have a single callback function performing services for many windows. You

keep track of the
window id
s in a global list and search for the
current window
in that list. But this is quicker than searching a data structure, and allows you to avoid the use of globals for this.

glutSetWindowData(3)

glutSetWindowData(3).