glutGetWindow - Man Page
Return the current window identifier, 0 if undefined
Library
OpenGLUT - window
Synopsis
#include <openglut.h>
int
glutGetWindow(void);
Description
glutGetWindow() returns the
window id
of the
current window
. This is useful, e.g., if you have a generic function that is used with several windows and it needs to temporarily change to another window. (There is no window stack for you to use with pushes and pops. Do not be confused by glutPushWindow() and glutPopWindow(); those pushes and pops are
not
stack-related!)
One cause for the function to return 0 is if you have called glutDestroyWindow() on the
current window
and have done nothing to set a new window as current.