* Melchior FRANZ -- Wednesday 19 November 2008:
> See the attached example [...]
Which can now also be written shorter, now that I've added
an "add-model" fgcommand. There's no need to search for
a free slot and to set/remove the "load" property any more.
One could always define a model by setting the <models><model>
branch in the *-set.xml file. But as with all fgcommands,
one can now also use "add-model" in a binding. (Not that
I have a meaningful use case for that :-).
<binding>
<command>add-model</command>
<path>Models/Fauna/cow.ac</path>
<latitude-deg>37.62887558</latitude-deg>
<longitude-deg>-122.39002720</longitude-deg>
<elevation-m>0.9106</elevation-m>
</binding>
Here's a revised version of the follow_the_cow script:
var data = "/sim/model/cow/";
fgcommand("add-model", props.Node.new({
"path": "Models/Fauna/cow.ac",
"latitude-deg-prop": data ~ "latitude-deg",
"longitude-deg-prop": data ~ "longitude-deg",
"elevation-ft-prop": data ~ "altitude-ft",
"heading-deg-prop": data ~ "heading-deg",
"pitch-deg-prop": data ~ "pitch-deg",
"roll-deg-prop": data ~ "roll-deg",
}));
var update_model = func {
var heading = getprop("/orientation/heading-deg");
var pitch = getprop("/orientation/pitch-deg");
var roll = getprop("/orientation/roll-deg");
var ac = geo.aircraft_position();
ac.apply_course_distance(heading, 10);
setprop(data ~ "latitude-deg", ac.lat());
setprop(data ~ "longitude-deg", ac.lon());
setprop(data ~ "altitude-ft", ac.alt() * geo.M2FT);
setprop(data ~ "heading-deg", heading + 180);
setprop(data ~ "pitch-deg", -pitch);
setprop(data ~ "roll-deg", -roll);
settimer(update_model, 0);
}
update_model();
m.
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