Data Range on Joystick.getRawAxis

[NWChen]

Originally Posted by Joe Ross

I'm curious where you found that information in the javadocs. I couldn't find it.

The method summary of getRawAxis() in Joystick links to this source code:

public double getRawAxis(final int axis) {
    return m_ds.getStickAxis(m_port, axis);
}

getStickAxis() is a method of DriverStation:

private DriverStation m_ds;

and in the DriverStation class the getStickAxis() method used with m_ds earlier is as follows:

public double getStickAxis(int stick, int axis) {
       if (axis < 1 || axis > kJoystickAxes) {
           return 0.0;
       }
   
           int value;
           switch (stick) {
                    ...
           default:
               return 0.0;
       }
   
       double result;
       if (value < 0) {
           result = ((double) value) / 128.0;
       } else {
           result = ((double) value) / 127.0;
       }
   
       // wpi_assert(result <= 1.0 && result >= -1.0);
       if (result > 1.0) {
           result = 1.0;
       } else if (result < -1.0) {
           result = -1.0;
       }
    return result;
}