/**
     * angle since last read, but in radians
     */
// FIXME I think this should be (2 * angle())/258
public float angleInRadians() {
        return (float) angle() / millimetersPerRadian;
    }
public float angleInRadians() {
return (float) angle() / millimetersPerRadian;
}
public float angleInRadians() {
return (float) angle() / millimetersPerRadian;
}
public float angleInRadians() {
return (float) angle() / millimetersPerRadian;
}