glutKeyboardFunc - sets the keyboard callback for the cur-
       rent window.

SYNTAX

       void glutKeyboardFunc(void (*func)(unsigned char key,
                             int x, int y));

ARGUMENTS

       func      The new keyboard callback function.

DESCRIPTION

       glutKeyboardFunc sets the keyboard callback for  the  cur-
       rent  window.  When a user types into the window, each key
       press generating an ASCII character will generate  a  key-
       board  callback.  The key callback parameter is the gener-
       ated ASCII character. The state of modifier keys  such  as
       Shift  cannot  be  determined  directly; their only effect
       will be on the returned ASCII data. The x and  y  callback
       parameters  indicate the mouse location in window relative
       coordinates when the key was pressed. When a new window is
       created, no keyboard callback is initially registered, and
       ASCII key strokes in the window are ignored. Passing  NULL
       to  glutKeyboardFunc  disables  the generation of keyboard
       callbacks.

       During a keyboard callback, glutGetModifiers may be called
       to determine the state of modifier keys when the keystroke
       generating the callback occurred.

       Use glutSpecialFunc for a means to  detect  non-ASCII  key
       strokes.

SEE ALSO

       glutKeyboardUpFunc, glutSpecialFunc, glutCreateWindow,
       glutMouseFunc, glutSpaceballButtonFunc, glutButtonBoxFunc,
       glutTabletButtonFunc, glutGetModifiers

AUTHOR

       Mark J. Kilgard (mjk@nvidia.com)