Manpage of glutDialsFunc
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glutDialsFunc - sets the dial & button box dials callback for the current window.
void glutDialsFunc(void (*func)(int dial, int value));
The new dials callback function.
glutDialsFunc sets the dial & button box dials callback for the
current window. The dial & button box dials callback for a window is
called when the window has dial & button box input focus (normally,
when the mouse is in the window) and the user generates dial & button
box dial changes. The dial parameter will be the dial number (starting
at one). The number of available dial & button box dials can be
determined with glutDeviceGet(GLUT_NUM_DIALS). The value
measures the absolute rotation in degrees. Dial values do not ``roll over''
with each complete rotation but continue to accumulate degrees (until the
int dial value overflows).
Registering a dial & button box dials callback when a dial & button box
device is not available is ineffectual and not an error. In this case, no dial
& button box dials callbacks will be generated.
Passing NULL to glutDialsFunc disables the generation of dial &
button box dials callbacks. When a new window is created, no dial &
button box dials callback is initially registered.
Mark J. Kilgard (email@example.com)
- SEE ALSO
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Time: 13:00:47 GMT, March 25, 2001