* Stuart Buchanan -- Tuesday 20 March 2007:
> 1) A "distance-to" function, that would evaluate to true when the user was
> within a given distance to a point (expressed in lat/long). This would be
> more useful than the current work-around that forces the tutorial writer
> to define a box with given long/lat sides.
Implemented. One can define one or more targets:
<targets>
<target>
<longitude-deg>-122.37931</longitude-deg>
<latitude-deg>37.626</latitude-deg>
</target>
<target>
<longitude-deg>-123.456</longitude-deg>
<latitude-deg>34.567</latitude-deg>
</target>
</targets>
... and the tutorial logic will offer distance and direction of the
aircraft to each of them as
/sim/tutorial/targets/target[0]/direction-deg
/sim/tutorial/targets/target[0]/distance-m
/sim/tutorial/targets/target[1]/direction-deg
/sim/tutorial/targets/target[1]/distance-m
A direction of 0 means that the target is straight ahead, 90 means
it's on the right, -90 on the left, -180 or -179.9999 in the back.
This can then be used in <condition>s.
Another improvement is, that one can now define more than one
<message> or <audio>, in which case one is chosen at random. See
the cvs log message for an example. :-)
m.
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