UNTITLED LOCAL UNTITLED
glutForceJoystickFunc -- Forces a joystick poll and callback.
OpenGLUT - input
Forces the OpenGLUT joystick code to poll your joystick(s) and to call your joystick callbacks with the result. The operation completes,
including callbacks, before glutForceJoystickFunc() returns.
The original WINCE import used a #if to turn this function off. That is wrong. The proper way to handle the joystick code is to generate
"null" events. The WINCE code needs to be fixed in og_joystick.c, not here.
SEE ALSO glutJoystickFunc(3)
Check Out this Related Man Page
glutJoystickFunc(3GLUT) GLUT glutJoystickFunc(3GLUT)NAME
glutJoystickFunc - sets the joystick callback for the current window.
void glutJoystickFunc(void (*func)(unsigned int buttonMask,
int x, int y, int z), int pollInterval);
func The new joystick callback function.
Joystick polling interval in milliseconds.
glutJoystickFunc sets the joystick callback for the current window.
The joystick callback is called either due to polling of the joystick at the uniform timer interval specified by pollInterval (in millisec-
onds) or in response to calling glutForceJoystickFunc. If the pollInterval is non-positive, no joystick polling is performed and the GLUT
application must frequently (usually from an idle callback) call glutForceJoystickFunc.
The joystick buttons are reported by the callback's buttonMask parameter. The constants GLUT_JOYSTICK_BUTTON_A(0x1), GLUT_JOYSTICK_BUT-
TON_B(0x2), GLUT_JOYSTICK_BUTTON_C(0x4), and GLUT_JOYSTICK_BUTTON_D(0x8) are provided for programming convience.
The x, y, and z callback parameters report the X, Y, and Z axes of the joystick. The joystick is centered at (0,0,0). X, Y, and Z are
scaled to range between -1000 and 1000. Moving the joystick left reports negative X; right reports positive X. Pulling the stick towards
you reports negative Y; push the stick away from you reports positive Y. If the joystick has a third axis (rudder or up/down), down
reports negative Z; up reports positive Z.
Passing a NULL func to glutJoystickFunc disables the generation of joystick callbacks. Without a joystick callback registered, glutForce-
JoystickFunc does nothing.
When a new window is created, no joystick callback is initially registered.
The GLUT joystick callback only reports the first 3 axes and 32 buttons. GLUT supports only a single joystick.
GLUT IMPLEMENTATION NOTES FOR X11
The GLUT 3.7 implementation of GLUT for X11 supports the joystick API, but not joystick input. A future implementation of GLUT for X11 may
add joystick support.
GLUT IMPLEMENTATION NOTES FOR WIN32
The GLUT 3.7 implementation of GLUT for Win32 supports the joystick API and joystick input, but does so through the dated joySetCapture and
joyGetPosEx Win32 Multimedia API. The GLUT 3.7 joystick support for Win32 has all the limitations of the Win32 Multimedia API joystick
support. A future implementation of GLUT for Win32 may use DirectInput.
glutForceJoystickFunc, glutMotionFunc, glutMouseFunc, glutSpaceballButtonFunc, glutSpaceballMotionFunc, glutButtonBoxFunc, glutTabletBut-
Mark J. Kilgard (firstname.lastname@example.org)
GLUT 3.7 glutJoystickFunc(3GLUT)
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