EVT_joySetUpperLeft

Calibrates the joystick upper left position

Declaration

void EVTAPI EVT_joySetUpperLeft(void)

Prototype In

event.h

Description

This function can be used to zero in on better joystick calibration factors, which may work better than the default simplistic calibration (which assumes the joystick is centered when the event library is initialised). To use this function, ask the user to hold the stick in the upper left position and then have them press a key or button. and then call this function. This function will then read the joystick and update the calibration factors.

Usually, assuming that the stick was centered when the event library was initialized, you really only need to call EVT_joySetLowerRight since the upper left position is usually always 0,0 on most joysticks. However, the safest procedure is to call all three calibration functions.

See Also

EVT_joySetUpperLeft, EVT_joySetLowerRight, EVT_joyIsPresent

Copyright © 2002 SciTech Software, Inc. Visit our web site at http://www.scitechsoft.com