glutTimerFunc - registers a timer callback to be triggered
in a specified number of milliseconds.

glutTimerFunc
	glutTimerFunc(millis, func, state) -> None

void glutTimerFunc(unsigned int msecs,
             void (*func)(int value), value);

msecs     Number of milliseconds to  pass  before  calling
          the callback.

func      The timer callback function.

value     Integer value to pass to the timer callback.

glutTimerFunc  registers  the  timer  callback  func to be
triggered in at least msecs milliseconds. The value param-
eter  to the timer callback will be the value of the value
parameter to glutTimerFunc. Multiple  timer  callbacks  at
same  or differing times may be registered simultaneously.

The number of milliseconds is a lower bound  on  the  time
before the callback is generated. GLUT attempts to deliver
the timer callback as soon as possible after  the  expira-
tion of the callback's time interval.

There  is  no support for canceling a registered callback.
Instead, ignore a callback based on  its  value  parameter
when it is triggered.

glutIdleFunc

Mark J. Kilgard (mjk@nvidia.com)