[Jsbsim-devel] Problem with nested tests in switches

[Gijs de R. <gij...@ho...>]

Hi all,

I've got a question about nested tests in switches. The following code does not work as advertised in current FlightGear. Whenever fcs/flaps/cmd-detent-deg == 25 or 30, fcs/flaps/int-cmd-deg is set to 20, even tough the velocity is smaller than 203 (in fact it is 0). Apparently the first nested test ignores the velocity test.

        <switch name="fcs/flaps/int-cmd-deg">
            <default value="fcs/flaps/cmd-detent-deg"/>
            <test logic="AND" value="20">
                velocities/vc-kts GT 203
                <test logic="OR">
                    fcs/flaps/cmd-detent-deg == 25
                    fcs/flaps/cmd-detent-deg == 30
                </test>
            </test>
            <test logic="AND" value="25">
                velocities/vc-kts GT 170
                velocities/vc-kts LT 203
                fcs/flaps/cmd-detent-deg == 30
            </test>
        </switch>

The following does work, but it leads to more duplicated code:

        <switch name="fcs/flaps/int-cmd-deg">
            <default value="fcs/flaps/cmd-detent-deg"/>
            <test logic="AND" value="20">
                velocities/vc-kts GT 203
                fcs/flaps/cmd-detent-deg == 25
            </test>
            <test logic="AND" value="20">
                velocities/vc-kts GT 203
                fcs/flaps/cmd-detent-deg == 30
            </test>
            <test logic="AND" value="25">
                velocities/vc-kts GT 170
                velocities/vc-kts LT 203
                fcs/flaps/cmd-detent-deg == 30
            </test>
        </switch>

According to an old message by Jon [1], the first one was known to fail back in 2012, but I think it should work nowadays, right? Is it broken (again) or did I miss anything?

Thanks!

Gijs

[1] https://sourceforge.net/p/jsbsim/mailman/message/30022194/