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glutSpecialFunc(3GLUT)                              GLUT                              glutSpecialFunc(3GLUT)



NAME
       glutSpecialFunc - sets the special keyboard callback for the current window.

SYNTAX
       #include <GLUT/glut.h>

       void glutSpecialFunc(void (*func)(int key, int x, int y));

ARGUMENTS
       func      The new special callback function.

DESCRIPTION
       glutSpecialFunc sets the special keyboard callback for the current window. The special keyboard call-back callback
       back is triggered when keyboard function or directional keys are pressed. The key callback  parameter
       is  a  GLUT_KEY_*  constant for the special key pressed. The x and y callback parameters indicate the
       mouse in window relative coordinates when the key was pressed. When a new window is created, no  spe-cial special
       cial  callback  is  initially  registered and special key strokes in the window are ignored.  Passing
       NULL to glutSpecialFunc disables the generation of special callbacks.

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

       An implementation should do its best to provide ways to generate all the GLUT_KEY_* special keys. The
       available GLUT_KEY_* values are:

       GLUT_KEY_F1
               F1 function key.

       GLUT_KEY_F2
               F2 function key.

       GLUT_KEY_F3
               F3 function key.

       GLUT_KEY_F4
               F4 function key.

       GLUT_KEY_F5
               F5 function key.

       GLUT_KEY_F6
               F6 function key.

       GLUT_KEY_F7
               F7 function key.

       GLUT_KEY_F8
               F8 function key.

       GLUT_KEY_F9
               F9 function key.

       GLUT_KEY_F10
               F10 function key.

       GLUT_KEY_F11
               F11 function key.

       GLUT_KEY_F12
               F12 function key.

       GLUT_KEY_LEFT
               Left directional key.

       GLUT_KEY_UP
               Up directional key.

       GLUT_KEY_RIGHT
               Right directional key.

       GLUT_KEY_DOWN
               Down directional key.

       GLUT_KEY_PAGE_UP
               Page up directional key.

       GLUT_KEY_PAGE_DOWN
               Page down directional key.

       GLUT_KEY_HOME
               Home directional key.

       GLUT_KEY_END
               End directional key.

       GLUT_KEY_INSERT
               Inset directional key.

       Note that the escape, backspace, and delete keys are generated as an ASCII character.

SEE ALSO
       glutSpecialUpFunc(3G), glutKeyboardFunc(3G), glutMouseFunc(3G), glutSpaceballButtonFunc(3G), glutButtonBoxFunc(3G), glut-TabletButtonFunc(3G), glutTabletButtonFunc(3G),
       TabletButtonFunc(3G), glutGetModifiers(3G)


AUTHOR
       Mark J. Kilgard (mjk@nvidia.com)



GLUT                                                 3.7                              glutSpecialFunc(3GLUT)