glutDialsFunc.man
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上传日期:2007-05-28
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- ."
- ." Copyright (c) Mark J. Kilgard, 1996.
- ."
- .TH glutDialsFunc 3GLUT "3.7" "GLUT" "GLUT"
- .SH NAME
- glutDialsFunc - sets the dial & button box dials callback for the current window.
- .SH SYNTAX
- .nf
- .LP
- void glutDialsFunc(void (*func)(int dial, int value));
- .fi
- .SH ARGUMENTS
- .IP fIfuncfP 1i
- The new dials callback function.
- .SH DESCRIPTION
- 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.
- .SH SEE ALSO
- glutButtonBoxFunc, glutDeviceGet
- .SH AUTHOR
- Mark J. Kilgard (mjk@nvidia.com)