glutGetWindowData (3) - Linux Manuals

glutGetWindowData: Get the user data for the current window

NAME

glutGetWindowData - Get the user data for the current window

LIBRARY

OpenGLUT - window

SYNOPSIS

In openglut.h Ft void* Fn glutGetWindowData void

DESCRIPTION

This function will return whatever Bf Sy
 void* Ef
 value is associated with the Bf Li
 current window Ef
  via glutSetWindowData(). This is Bf Sy
 NULL Ef
 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 Bf Em
 could Ef
  keep track of the  Bf Li
 window id Ef
 s in a global list and search for the Bf Li
 current window Ef
  in that list. But this is quicker than searching a data structure, and allows you to avoid the use of globals for this.