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This is fgpanel - basically the stripped down 2D-Panel code from
FlightGear. It is designed as a standalone lightweight panel
rendering engine to draw 2d panels on a lowcost computer/graphic card
without 3d acceleration at reasonablel framerates.
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This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
=====================================================================
Usage
start fgpanel with
fgpanel --fg-root=/path/to/fg/data --panel=Aircraft/MyAircraft/Panels/MyPanel.xml
with the command args set to
--fg-root shall point to the directory where your FGDATA lives
NOTE: you don't need a full copy of FGDATA, just the panel definition files for
your aircraft, e.g.
- Aircraft/MyAircraft/Panels/*
- Aircraft/Instruments/* (if referenced)
-panel shall point to a panel-configuration file, relative to FGDATA
start flightgear with
fgfs --generic=socket,out,10,239.24.10.64,5432,udp,../Aircraft/MyAircraft/Panels/SampleProtocol
=====================================================================
Sample:
Create the sample files within your aicraft directory, preferrable under Panels
MyPanel.xml
sample-2d-panel.xml
SampleProtocol.xml
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Sample panel configuration file (MyPanel.xml)
<PropertyList>
<!-- true: run full-screen, false; run in window -->
<game-mode type="bool">false</game-mode>
<!-- include the panel definitions (2d-panel syntax)-->
<panel include="sample-2d-panel.xml"/>
<!-- compose your property-tree here -->
<sim>
<panel>
<flip-x type="bool">false</flip-x>
</panel>
<instrument-options>
<omit-knobs type="bool">true</omit-knobs>
</instrument-options>
</sim>
<!-- network communication settings -->
<communication>
<listen>
<!-- interface to bind to,
leave empty for all interfaces -->
<host>239.24.10.64</host> <!-- multicast address! -->
<port>5432</port> <!-- tcp port to listen to -->
<style>udp</style> <!-- udp or tcp (forget about tcp!) -->
</listen>
<!-- the generic protocol definition
same as used for fgfs --generic=foobar option
-->
<protocol include="SampleProtocol.xml"/>
</communication>
</PropertyList>
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Sampe 2d-panel configuration file sample-2d-panel.xml
To be included from the panel configuration file
<?xml version="1.0"?>
<PropertyList>
<name>Sample Instrument Panel</name>
<w>375</w> <!-- screen width: 375mm -->
<h>305</h> <!-- screen height: 305mm -->
<instruments>
<!-- use FlightGear's c172 attitude indicator -->
<instrument include="../../Instruments/ati-c172s.xml">
<name>Attitude Gyro</name>
<x alias="../../../params/col-2"/>
<y alias="../../../params/row-1"/>
<w>80</w>
<h>80</h>
</instrument>
</instruments>
</PropertyList>
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Sample protocol configuration file to drive the AI (SampleProtocol.xml)
<?xml version="1.0"?>
<PropertyList>
<generic>
<output>
<line_separator>newline</line_separator>
<var_separator>,</var_separator>
<chunk>
<type>float</type>
<format>%.2f</format>
<node>/position/altitude-agl-ft</node>
</chunk>
<chunk>
<type>float</type>
<format>%.2f</format>
<node>/instrumentation/attitude-indicator/indicated-roll-deg</node>
</chunk>
<chunk>
<type>float</type>
<format>%.2f</format>
<node>/instrumentation/attitude-indicator/indicated-pitch-deg</node>
</chunk>
<chunk>
<type>float</type>
<format>%.2f</format>
<node>/instrumentation/attitude-indicator/horizon-offset-deg</node>
</chunk>
<chunk>
<type>float</type>
<format>%.4e</format>
<node>/instrumentation/attitude-indicator/spin</node>
</chunk>
</output>
</generic>
</PropertyList>
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