Since David complained about the damping mechanism in viewer.cxx,
I wanted to check whether the same feature could also be done in
Nasal. (Damping is at the moment only used in the "Chase View".
It's just lowpass filters on the heading/pitch/roll angles, which
make the viewer follow the aircraft with a slight delay.)
I had to fix a jitter problem in the main loop, and there's
one more to fix for replay (already done on my HD), but most of
the work is done. There's now a manager in $FG_ROOT/Nasal/view.nas
where one can register Nasal view handlers. This is by default
only done for the Fly-By-View.
Here are two more examples. Each of them is an XML file with some
settings and embedded Nasal code, and implements a new "view".
You can try them out at once:
$ fgfs --aircraft=j3cub ~/chase-view-II.xml ~/model-view.xml
Use full paths for the files. (~ expands to a full path :-)
chase-view-II.xml is a proof of concept. It's a slightly
extended chase view, where also latitude/longitude/altitude
are lowpass filtered. This is nice to see how far an aircraft
drops in a barrel roll. Might also be nice for movies.
model-view.xml allows to cycle through all carriers, tankers,
aircraft, multiplayer (untested) with the q/Q keys.
m.
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