* gerard robin -- 8/26/2008 2:32 PM:
> The specific air refueling and or fuel.nas makes problems if the Aircraft has
> some specific tank management, for instance Crusader has a specific "transfer
> tank" which feed the others, Blackbird has an other process.... in order to
> manage the balance and so on.
With the generic interface an aircraft could just refuse to take any fuel,
based on electrical system, or whatever. The idea again is something like
this in fuel.nas (with merged in aar.nas):
fuel_interface.setDoubleValue(offered_amount);
var accepted_amount = fuel_interface.getValue();
if (!accepted_amount)
return;
if (accepted_amount > 0)
fill_tanks(accepted_amount);
subtract_from_tanker(abs(accepted_amount));
Normally, no listener is attached to node "fuel_interface", so the value will
be the same after reading in again, and all that was offered in this cycle
will be filled into all active tanks, just as it's the case now. But an
aircraft could attach a listener to that node:
setlistener(fuel_interface, func(n) {
if (don_t_feel_like_tanking) {
n.setDoubleValue(0); # no thanks; offer rejected
} else {
var amount = n.getValue();
do_fancy_stuff_with(amount);
n.setDoubleValue(-amount); # we took *and* distributed it
}
});
... or something.
> As, i told before, depending on the FDM we can, more or less, include part
> of these specific features into the FDM itself, JSBSim is able to take it.
Yeah, I bet one could code Tetris within a JSBSim config file. Whether it
makes sense is a different matter. ;-)
> Regarding the new "type" probe/boom which is defined into into the
> model.xml with nasal, won't it be possible to define it, into the
> demo.xml file instead of it ?
The refueling type must be known over MP/AI. It must also work for
aircraft piloted by a human. The demo XML file is the wrong place for
that. And then the refueling capacities are properties of the tanker,
not of a particular scenario. I agree, however, that using one model
for either refueling type (and "select"-animating the boom/probe model
based on that) would be a good idea.
m.
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