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Telnet usage: Difference between revisions
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→Use Case: Radio Stack: http://www.mail-archive.com/flightgear-devel@flightgear.org/msg06862.html
(→Use Case: Radio Stack: http://www.mail-archive.com/flightgear-devel@flightgear.org/msg06862.html) |
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If you need to track 100 different variables at 60hz, this isn't the interface for you. | If you need to track 100 different variables at 60hz, this isn't the interface for you. | ||
For that you should consider using a native protocol, implemented in C++ (e.g. FGNetCtrl via UDP). | For that you should consider using a native protocol, implemented in C++ (e.g. FGNetCtrl via UDP). | ||
== Use Case: Instructor Station == | |||
I have just added the raw beginnings of a Java client library and trivially-simple Swing GUI demo under scripts/java/demo/FGClient/. | |||
Here's the Java code to connect to a FlightGear process and increase the current altitude by 1000 feet: | |||
<syntaxhighlight language="java"> | |||
FGConnection fgfs = new FGConnection("localhost", 9000); | |||
double altitude = fgfs.getDouble("/position/altitude-ft"); | |||
fgfs.setDouble("/position/altitude-ft", altitude + 1000); | |||
fgfs.close(); | |||
</Syntaxhighlight> | |||
The demo application displays the current altitude, longitude, and | |||
latitude in a small GUI window, and uses a separate thread to update | |||
the values every second. To use it, try these commands: | |||
<pre> | |||
fgfs --telnet=9000 | |||
java FGFSDemo localhost 9000 | |||
</pre> | |||
I might develop this into a remote instructor's panel, a full configuration GUI, a remote-control module for weather and other | |||
environment parameters, or any combination of these. Contributions are welcome, of course. | |||
== Use Case: Radio Stack == | == Use Case: Radio Stack == | ||