glutGetModifiers  -  returns  the  modifier key state when
certain callbacks were generated.

glutGetModifiers
	glutGetModifiers() -> None

int glutGetModifiers(void);

glutGetModifiers returns the modifier  key  state  at  the
time  the  input  event  for a keyboard, special, or mouse
callback is generated.  This routine may  only  be  called
while a keyboard, special, or mouse callback is being han-
dled. The window system is permitted to  intercept  window
system  defined  modifier key strokes or mouse buttons, in
which case, no  GLUT  callback  will  be  generated.  This
interception  will  be  independent of use of glutGetModi-
fiers.

The bitmask components of the returned integer value are:

GLUT_ACTIVE_SHIFT
        Set if the Shift modifier or Caps Lock is  active.

GLUT_ACTIVE_CTRL
        Set if the Ctrl modifier is active.

GLUT_ACTIVE_ALT
        Set if the Alt modifier is active.

glutSpecialFunc, glutKeyboardFunc, glutMouseFunc

Mark J. Kilgard (mjk@nvidia.com)