glutTabletMotionFunc  - sets the special keyboard callback
for the current window.

glutTabletMotionFunc
	glutTabletMotionFunc(func) -> None

void glutTabletMotionFunc(void (*func)(int x, int y));

func      The new entry callback function.

glutTabletMotionFunc sets the tablet motion  callback  for
the  current window. The tablet motion callback for a win-
dow is called when the window has tablet input focus (nor-
mally,  when the mouse is in the window) and the user gen-
erates tablet motion. The  x  and  y  callback  parameters
indicate  the  absolute position of the tablet ``puck'' on
the tablet. The callback parameters are normalized  to  be
within the range of 0 to 2000 inclusive.

Registering  a tablet motion callback when a tablet device
is not available is ineffectual and not an error. In  this
case, no tablet motion callbacks will be generated.

Passing  NULL to glutTabletMotionFunc disables the genera-
tion of tablet motion callbacks. When a new window is cre-
ated, no tablet motion callback is initially registered.

glutTabletButtonFunc,    glutDeviceGet,    glutMotionFunc,
glutSpaceballMotionFunc

Mark J. Kilgard (mjk@nvidia.com)