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------- Flight Gear FAQ v0.03 14/04/1999 ---------------------
Welcome to the Flight Gear FAQ. Here you find Questions/URL's/Tips about
Flight Gear mainly asked in the mailing lists.
This Document is divided into 5 sections:
1. Distribution Questions
2. Compiling Questions
3. User Questions
4. Windoze related Questions
5. ???
-------- Index -----------
Section One Distribution :
1) Where can I get the latest version of this FAQ ?
2) What else is a must read ?
3) Where is the latest distribution of Flight Gear... ?
4) Where can I find the newest snapshots ?
5) Where can I fly ?
Section Two Compiling :
1) Flight Gear doesn't smooth compile though configured succesfully
2) "gpc.c" and "gpc.h" files
3) Compiler could not find gfc/...
4) Red Had 5.1 / 5.2 related probs
Section Three User :
1) Upside down after crash?
2) Ailleron vs Rudder
3) FG is sooo slow (1 fps).
Section Four Windoze :
Section Five ??? :
========================================================================
SECTION ONE : Distribution Questions
1.1) Where can I get the latest version of this FAQ ?
Ans: The latest version is stored at
http://www.online-club.de/home/olk/progs/flightgear
and it's updates are announced at flightgear mailing lists.
------------------------------------------------------------------------
1.2) What else is a must read ?
Ans: Please also check out the "Getting started"-document which
provides much, much detailed information.
------------------------------------------------------------------------
1.3) Where is the latest distribution of Flight Gear... ?
Ans: ftp://ftp.flightgear.org/pub/fgfs/Source
------------------------------------------------------------------------
1.4) Where can I find the newest snapshots ?
Ans: ftp://ftp.flightgear.org/pub/fgfs/Source/Snapshots
------------------------------------------------------------------------
1.5) Where can I fly ?
Ans: In front of your monitor, hehehe...
[FG until v0.58]:
Curt has a nice collection of some flight-scenarios in the U.S.
have a look at the descriptions and needed files
http://www.flightgear.org/Places/
There are also scenarios located at:
ftp://ftp.flightgear.org/pub/fgfs/Scenery/
There you find currently AZ-central, Equador, Spain, Munich (DE)
Frankfurt (DE) can be found at
http://people.frankfurt.netsurf.de/teddy/frankfurt.tar.gz
Switzerland scenario at
http://www.2sic.ch/Hoshy/flightgear.html
[FG after v0.59 incl.]:
Due to changes to the scenery format, which is currently v0.2,
the old Scenery Files (see above) are not compatible to FlightGear
v0.59 and later.
The folowing Scenery Files are recommended instead:
Alaska (Prince William Sounds) Scenario located at
ftp://ftp.flightgear.org/pub/fgfs/Scenery/new-format-demo.tar.gz
You also need the fgfs-base-0.59.tar.gz package with new graphics
ftp://ftp.flightgear.org/pub/fgfs/Shared
------------------------------------------------------------------------
========================================================================
SECTION TWO : Compiling questions
For the time beeing more Unix/Linux related.
2.1) Flight Gear doesn't smooth compile though configured succesful
Ans: The fgfs-sources contain some Scenery Tool Kits beeing yet beta,
they use libraries written by others so there is often some
code/makefile tweaking needed. But this doesn't matter since
the Flight Gear executable is then already compiled.
Just make install from toplevel Makefile directory
and up you go...
-----------------------------------------------------------------------
2.2) "gpc.o" and "gpc.h"
Can anyone advise me on what to do with the gpc.c and gpc.h files.
I retrieved them OK after "configure"reported that they were needed.
But, I don't know what I'm supposed to do with them.
Ans: Flight Gear's Makefile expects libgpc to be on your System.
Try this: gcc -c gpc.c
ar cru libgpc.a gpc.o
Then copy libgpc.a to some place that your compiler knows about such
as /usr/local/lib, and then try compiling again. A better idea would be
to set LIBRARY_PATH to point to the location where you installed
the libgpc.a file instead of dropping it into a system-wide library
directory.
Caveat Emptor:
One word of warning to Linux / Unix users. I recently discovered
that the gnu pascal compiler is also called "gpc" and comes with a
libgpc.a I know this has caused confusion on the part of at least one
or two people.
-------------------------------------------------------------------------
2.3) compiler could not find gfc/...
e.g. main.cxx:32: gfc/gshapefile.h: No such file or directory
main.cxx:30: gfc/gadt_polygon.h: No such file or directory
main.cxx:31: gfc/gdbf.h: No such file or directory
main.cxx:32: gfc/gshapefile.h: No such file or directory
there is no gadt_polygon.h on my system. What library does it belong to ?
Ans: This is part of the GFC library it is not needed to run FlightGear
as it is part of the beta Scenery Tool Kit
GFC -- Geographic Foundation Classes library
http://www.geog.psu.edu/~qian/gfc/index.html
--------------------------------------------------------------------------
2.4) Red Had 5.1/5.2 related problems
I quickly ran into problems with the basic_string library. (see undefined ref.)
c++ -g -O2 -L/usr/local/lib -L/usr/X11R6/lib -o testbucket
testbucket.o../../Lib/Bucket/libBucket.a -lmtestbucket.o: In function
FGBucket::gen_base_path(void)':/usr/include/g++/std/bastring.h:75: undefined
reference to Basic_string<char,string_char_traits<char>,
__default_alloc_template<true, 0>>::Rep::clone(void)'collect2: ld returned 1
exit statusmake[2]: *** [testbucket] Error 1
Ans: I ran into the same problem on my RedHat 5.2 system (brand new).
After some searching I found out that it's got to do with a 'bug' in
the stdlibc++libraries. I picked up libstdc++-2.9.0-2.i386.rpm,
installed it and FGFS compiled just fine (after some other problems
with gfc, I had to pick up the one from the fgfs site). However, some
other packages must have the libstdc++-2.8 libraries....
Ans: I also solved it with the 2.8 libraries by including
/usr/include/g++/std/bastring.cc into the example programs.
I believe this can be done since it's a template.
==========================================================================
SECTION THREE : User Questions
3.1) Upside down after crash ?
After beeing crashed on the ground the navion continues to fly
upside-down and it stucks at almost groundlevel,
(like cruse missile ;-) flying with a reverse heading as before
and "balancing" left and right. The only solution seems to be
to give full throttle and then at +80-90 kts it can move up by
pressing one of the "elevator arrows" like a rocket doing a loop.
But hey, that's nerving bc the loop is allways to short and the
responding time of navion (correcting the "roll") is also to short,
which results in crash so you have to re-throttle again.
Ans: In his infinite wisdom the FlightGear GrandMaster decided
that planes were to valuable to allow them to be destroyed
by novice pilots who seemed to crash alot.
The result of this as you have noticed is that
with a little practice an ingenuity you can trim the ship
to fly inverted along the ground.
The trick to learn is to roll back to normal (non inverted)
do this by nursing the elevator to get to about 500 feet or so
and use the aierlons to snap roll 180*.
This is all good avionics except for the plane not destroying itself.
Remember the controls work in reverse when you are inverted
and keep that airspeed up !!!
---------------------------------------------------------------------------
3.2) Ailleron vs Rudder
What's the difference. Both help the plane to turn, that i did understand
Ans: There is a bit of info on aileron vs. rudder here:
http://www.arundel.net/xplane/html/crosswind.html
http://www.monmouth.com/~jsd/how/
---------------------------------------------------------------------------
3) FG is sooo slow (1 fps), though i got hardware acceleration like
Voodoo/Voodoo2 etc... What's the reason ?
Ans: Flight Gear supports hardware acceleration, but it seems not
to be activated. Even a P-400 goes berzerk using software rendering.
First check out if you have MESA with glide support.
Linux Users enter "make linux-glide" to compile Mesa
Check out your environment variables, whether you use soft or hard-ware
rendering. Here an example that should work :
You have to tell Mesa to use fullscreen
MESA_GLX_FX=fullscreen
You also must set the appropriate Voodoo vars, here is for Voodoo2
the Voodoo1 vars may slightly differ.
SSTV2_BGAMMA=1.00
SSTV2_FASTMEM_RAS_READS=1
SSTV2_FASTPCIRD=1
SSTV2_GAMMA=1.00
SSTV2_GGAMMA=1.00
SSTV2_GRXCLK=95
SSTV2_RGAMMA=1.00
SSTV2_SCREENREFRESH=60
SSTV2_SWAP_EN_WAIT_ON_VSYNC=0
SSTV2_VGA_PASS=0
The Voodoo vars can be obtained at:
http://www.bahnhof.se/~engstrom/e_3dfxvars.htm
Another good tool is glide-control to set the env. vars, go get it at:
http://www.ling.ed.ac.uk/~oliphant/gc
Check also the help-startup-screen of Flight Gear:
fgfs --help
===========================================================================
Oliver Delise Maintainer of FAQ
Please send any comments/suggestions/flames or beer to delise@rp-plus.de

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<html lang="en"><!-- $Id$ --><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>FlightGear FAQ</title><style type="text/css">
.indent { margin-left: 2em; margin-right: 1em; }
</style></head><body>
<h1 align="center">FlightGear FAQ</h1>
<p align="center"><small>Cameron Moore<br><a href="mailto:cameron@unbeatenpath.net?subject=FlightGear%20FAQ">cameron@unbeatenpath.net</a></small></p><hr noshade="yes">
<h2>Introduction</h2>
<p>Welcome to the FlightGear FAQ. Here you will find the answers to
some questions that are frequently asked on our mailing lists. If
you have a question that is not answered here, feel free to ask
us on our mailing lists. Enjoy</p>
<hr noshade="yes"><h2><a name="toc">Table of Contents</a></h2><h4>1 -
<a href="#1">The FAQ</a></h4><div class="indent">1.1 -
<a href="#1.1">Where can I get the latest version of this FAQ?</a></div><div class="indent">1.2 -
<a href="#1.2">Who do I contact if I have comments about this FAQ?</a></div><div class="indent">1.3 -
<a href="#1.3">What other important documentation should I read?</a></div><div class="indent">1.4 -
<a href="#1.4">How old is this document?</a></div><br><h4>2 -
<a href="#2">Distribution</a></h4><div class="indent">2.1 -
<a href="#2.1">Where is the latest distribution of FlightGear?</a></div><div class="indent">2.2 -
<a href="#2.2">Where can I find the newest snapshots?</a></div><div class="indent">2.3 -
<a href="#2.3">Where can I fly and where do I get the scenery?</a></div><div class="indent">2.4 -
<a href="#2.4">Where can I get some different 3D models for my plane?</a></div><br><h4>3 -
<a href="#3">Compiling</a></h4><div class="indent">3.1 -
<a href="#3.1">Why won't FlightGear compile?</a></div><div class="indent">3.2 -
<a href="#3.2">I'm using RedHat 7, and ...?</a></div><br><h4>4 -
<a href="#4">Configuring</a></h4><div class="indent">4.1 -
<a href="#4.1">How do I install new scenery?</a></div><div class="indent">4.2 -
<a href="#4.2">How do I setup my joystick(s)?</a></div><br><h4>5 -
<a href="#5">Running</a></h4><div class="indent">5.1 -
<a href="#5.1">Why is FlightGear so slow?</a></div><div class="indent">5.2 -
<a href="#5.2">Why is my SGI machine so slow?</a></div><div class="indent">5.3 -
<a href="#5.3">Stuck upside down after "crash"?</a></div><div class="indent">5.4 -
<a href="#5.4">What happened to the panel, keyboard, etc?</a></div><div class="indent">5.5 -
<a href="#5.5">Why doesn't audio work properly under Irix?</a></div><div class="indent">5.6 -
<a href="#5.6">Why do I get an error loading libmk4.so.0?</a></div><br><h4>6 -
<a href="#6">Hacking</a></h4><div class="indent">6.1 -
<a href="#6.1">How do I design a flight dynamics model for a new plane?</a></div><div class="indent">6.2 -
<a href="#6.2">How do I import planes from Microsoft Flight Simulator?</a></div><div class="indent">6.3 -
<a href="#6.3">How do I import BGL scenery from Microsoft Flight Simulator?</a></div><div class="indent">6.4 -
<a href="#6.4">How do I design or modify a panel?</a></div><div class="indent">6.5 -
<a href="#6.5">How do I place objects, like buildings, into FlightGear?</a></div><br><h4>7 -
<a href="#7">Flying</a></h4><div class="indent">7.1 -
<a href="#7.1">Where can I learn about instrument flying and navigation?</a></div><div class="indent">7.2 -
<a href="#7.2">What is the difference between Aileron and Rudder?</a></div><br><h4>8 -
<a href="#8">FlightGear v0.7.6</a></h4><div class="indent">8.1 -
<a href="#8.1">Why do I get an error in viewer.cxx about `exit' being undeclared?</a></div><br>
<hr><h2><a name="1">1 -
The FAQ</a></h2>
<b><a name="1.1">1.1 -
<u>Where can I get the latest version of this FAQ?</u></a></b>
<div class="indent">
<p>
<a href="http://flightgear.org/Docs/FlightGear-FAQ.html">http://flightgear.org/Docs/FlightGear-FAQ.html</a>
</p>
</div>
<b><a name="1.2">1.2 -
<u>Who do I contact if I have comments about this FAQ?</u></a></b>
<div class="indent">
<p>First contact the author. If you get no response, send your
comments to the flightgear-users mailing list.</p>
</div>
<b><a name="1.3">1.3 -
<u>What other important documentation should I read?</u></a></b>
<div class="indent">
<p>Definitely read the <i>FlightGear Installation and Getting
Started</i> document available at
<a href="http://flightgear.org/Docs/">http://flightgear.org/Docs/</a>.</p>
<p>Also see the FlightGear/docs-mini/ directory in the source
distribution for various other helpful documents.</p>
</div>
<b><a name="1.4">1.4 -
<u>How old is this document?</u></a></b>
<div class="indent">
<p>See the <i>About This Document</i> section at the end of the FAQ.</p>
</div>
<hr><h2><a name="2">2 -
Distribution</a></h2>
<b><a name="2.1">2.1 -
<u>Where is the latest distribution of FlightGear?</u></a></b>
<div class="indent">
<p>See
<a href="http://flightgear.org/Downloads/">http://flightgear.org/Downloads/</a>.
</p>
</div>
<b><a name="2.2">2.2 -
<u>Where can I find the newest snapshots?</u></a></b>
<div class="indent">
<p>The best place to get the latest development code is from our CVS
repository. See
<a href="http://flightgear.org/cvsResources/">http://flightgear.org/cvsResources/</a> for details.
</p>
<p>Otherwise, you can get relatively up-to-date snapshots of the
development tree at
<a href="ftp://flightgear.sourceforge.net/pub/flightgear/Devel/Snapshots/">ftp://flightgear.sourceforge.net/pub/flightgear/Devel/Snapshots/</a>.
</p>
</div>
<b><a name="2.3">2.3 -
<u>Where can I fly and where do I get the scenery?</u></a></b>
<div class="indent">
<p>While the base package only comes with scenery for the San Francisco
Bay area, you can currently fly just about anywhere in the world.
See the <i>"Additional Scenery"</i> section of
<a href="http://flightgear.org/Downloads/">http://flightgear.org/Downloads/</a>
for more information or go directly to our graphical downloader at
<a href="http://flightgear.org/Downloads/world-scenery.html">http://flightgear.org/Downloads/world-scenery.html</a>.
</p>
<p>Also visit our <i>"Places to Fly"</i> section of the website
(<a href="http://flightgear.org/Places/">http://flightgear.org/Places/</a>)
for some help navigating to some awesome locations.</p>
</div>
<b><a name="2.4">2.4 -
<u>Where can I get some different 3D models for my plane?</u></a></b>
<div class="indent">
<p>We currently don't have any of our own models yet, but we have
been given permission by several people to convert their models (which
where originally intended for use with <i>Microsoft Flight
Simulator</i>) to use with FlightGear. See Wolfram's Hangar
(<a href="http://home.t-online.de/home/Wolfram.Kuss/">http://home.t-online.de/home/Wolfram.Kuss/</a>)
for a list of what we currently have available as well as
information on how to convert models yourself.</p>
</div>
<hr><h2><a name="3">3 -
Compiling</a></h2>
<b><a name="3.1">3.1 -
<u>Why won't FlightGear compile?</u></a></b>
<div class="indent">
<p>Well, that depends. First make sure you are using the appropriate
versions of FlightGear, SimGear, and plib. If any of the packages are
out of sync with the others, compilation may fail.</p>
<p>The FlightGear <i>Downloads</i> page
(<a href="http://flightgear.org/Downloads/">http://flightgear.org/Downloads/</a>)
should tell you what versions you need if you are trying to compile
the latest stable release. If you are using a development snapshot,
make sure all three packages are up-to-date.</p>
<p>Also ensure that you have some implementation of OpenGL with glut
support with the appropriate header files. Linux users with nVidia
cards should make sure you have the latest drivers from nVidia. Other
Linux users make sure you have Mesa3D
(<a href="http://mesa3d.org">http://mesa3d.org</a>)
and your X server installed correctly. Windows users see
<a href="http://www.x-plane.com/SYSREQ/v5ibm.htm">http://www.x-plane.com/SYSREQ/v5ibm.html</a>,
and Mac users see
<a href="http://www.x-plane.com/SYSREQ/v5mac.html">http://www.x-plane.com/SYSREQ/v5mac.html</a>.
</p>
<p>If your problems persist, subscribe to our FlightGear-Users mailing
list and let us know what problem you're having. See
<a href="http://flightgear.org/mail.html">http://flightgear.org/mail.html</a> for help with this.
</p>
</div>
<b><a name="3.2">3.2 -
<u>I'm using RedHat 7, and ...?</u></a></b>
<div class="indent">
<p>Update your gcc packages. See
<a href="http://redhat.com/errata/">http://redhat.com/errata/</a>
to fix it and
<a href="http://www.gnu.org/software/gcc/gcc-2.96.html">http://www.gnu.org/software/gcc/gcc-2.96.html</a>
for an explanation why.</p>
</div>
<hr><h2><a name="4">4 -
Configuring</a></h2>
<b><a name="4.1">4.1 -
<u>How do I install new scenery?</u></a></b>
<div class="indent">
<p>The scenery archive files (ie. w100n30.tar.gz) should be untarred
into the <code>Scenery/</code> directory in your
<code>$FG_ROOT</code>.</p>
</div>
<b><a name="4.2">4.2 -
<u>How do I setup my joystick(s)?</u></a></b>
<div class="indent">
<!--
<p>FlightGear should come with a helpful program called <i>`fgjs`</i>
that can help configure your joystick.</p>
-->
<p>See the README.Joystick file located in the
<code>FlightGear/docs-mini/</code> directory of the source
distribution. This document is mirrored at
<a href="http://rockfish.net/shell/aboutjoy.txt">http://rockfish.net/shell/aboutjoy.txt</a>.
</p>
<p>If you have a joystick with digital axes, see
<a href="http://www.unet.univie.ac.at/~a8603365/flightgear.html">http://www.unet.univie.ac.at/~a8603365/flightgear.html</a>
for a patch to the development version of FlightGear.</p>
</div>
<hr><h2><a name="5">5 -
Running</a></h2>
<b><a name="5.1">5.1 -
<u>Why is FlightGear so slow?</u></a></b>
<div class="indent">
<p>FlightGear supports hardware acceleration, but it seems not to be
activated. Make sure you have OpenGL libraries installed and
configured properly and make sure you have the latest drivers for your
video card.</p>
<p><b>Linux users</b>: If you are an nVidia user, follow their
directions on getting your card working. For most other users, make
sure Mesa is installed property and ensure that you have the
appropriate kernel device drivers for your card. Most people (and
distributions) use modules for their video card device drivers; run
<i>`lsmod`</i> as root to see what modules are loaded. You should also
make sure that you are loading the appropriate modules in your
XF86Config and that your video device section is correct. Now try
running an OpenGL application (other than FlightGear) to see how it
performs. You can try the <i>gears</i> demo from Mesa or something
like <i>Quake3</i>.</p>
</div>
<b><a name="5.2">5.2 -
<u>Why is my SGI machine so slow?</u></a></b>
<div class="indent">
<p>First of all, one of the most common mistakes on SGI hardware is to
forget to specify --fog-fastest. On most SGI machines the EXP2 shading
model isn't hardware supported resulting in frame rates below 1 frame
per second (fps).</p>
<p>FlightGear makes extensive use of the OpenGL z-buffer feature,which
on most older SGI hardware is only supported in software. This means
that the CPU has to do all the z-buffer calculations in addition to the
other tasks FlightGear involves (flight dynamics, scenery tracking,
pushing commands into the graphics queue, etc). The following features
are software rendered on low-end SGI machines (like Indy and
Indigo):</p>
<ul>
<li>stencil and accumulation buffer</li>
<li>depth queuing and depth buffering</li>
<li>fogging, lighting, clipping and transforms</li>
<li>texturing</li>
</ul>
<p>This means that running FlightGear with the following options may not
even get the desired result:</p>
<p><code>./runfgfs --fog-disable --shading-flat --disable-skyblend \</code><br>
<code>--disable-textures --disable-clouds --disable-sound \</code><br>
<code>--disable-panel --enable-hud --disable-anti-alias-hud</code></p>
<p>I could even imagine that adding --enable-wireframe doesn't work on
these machines (I would be happy to be proven wrong though).</p>
<p>On a machine like O2 the following options give an acceptable
result:</p>
<code>./runfgfs --fog-fastest --disable-sound</code>
<p>Since I don't have access to other SGI hardware I can't tell which
options would be appropriate for your situation.</p>
</div>
<b><a name="5.3">5.3 -
<u>Stuck upside down after "crash"?</u></a></b>
<div class="indent">
<p>In his infinite wisdom the FlightGear Grand Master decided that
planes were to valuable to allow them to be destroyed by novice pilots
who seemed to crash a lot. The fact that nobody has bothered to model
crashes may have something to do with it too. :-)</p>
<p>The result of this as you have noticed is that with a little
practice an ingenuity you can trim the ship to fly inverted along the
ground.</p>
<p>The quick answer is to hit Ctrl+U (with the default key bindings)
to warp the plane up 1000ft.</p>
<p>For the stubborn people out there: The trick to learn is to roll
back to normal (non inverted) do this by nursing the elevator to get
to about 500 feet or so and use the ailerons to snap roll 180*.
This is all good avionics except for the plane not destroying
itself. Remember the controls work in reverse when you are inverted
and keep that airspeed up!!!</p>
</div>
<b><a name="5.4">5.4 -
<u>What happened to the panel, keyboard, etc?</u></a></b>
<div class="indent">
<p>If you are using a development version of FlightGear, make
sure you also have the latest base package. See
<a href="http://rockfish.net/fg/">http://rockfish.net/fg/</a>
for details on getting the latest CVS version.</p>
</div>
<b><a name="5.5">5.5 -
<u>Why doesn't audio work properly under Irix?</u></a></b>
<div class="indent">
<p>FlightGear (as of June 2001) uses the Portable Libraries (PLIB)
for playing audio. The audio queue implementation of PLIB is far from
optimal (in fact it's just wrong). This seems to work on other
platforms quite well, but Irix expects things to be programmed
properly.</p>
<p>There has been discussion about using OpenAL
(<a href="http://www.openal.org">http://www.openal.org</a>)
for the next release of both PLIB and FlightGear. Tests show that
the OpenAL audio implementation does the job right, meaning that
these audio problems should be gone by then. In the mean time it is
best to disable audio on Irix completely (by adding --disable-sound
either on the command line or to your <code>$HOME/.fgfsrc</code>
file).</p>
</div>
<b><a name="5.6">5.6 -
<u>Why do I get an error loading libmk4.so.0?</u></a></b>
<div class="indent">
<p>With the default installation, libmk4.so.0 is installed into
<code>/usr/local/lib</code>. You need to ensure that that path is
listed in <code>/etc/ld.so.conf</code>, then run <i>`ldconfig`</i>as
root.</p>
</div>
<hr><h2><a name="6">6 -
Hacking</a></h2>
<b><a name="6.1">6.1 -
<u>How do I design a flight dynamics model for a new plane?</u></a></b>
<div class="indent">
<p>See
<a href="http://jsbsim.sf.net">http://jsbsim.sf.net</a>.</p>
</div>
<b><a name="6.2">6.2 -
<u>How do I import planes from Microsoft Flight Simulator?</u></a></b>
<div class="indent">
<p>See
<a href="http://home.t-online.de/home/Wolfram.Kuss/">http://home.t-online.de/home/Wolfram.Kuss/</a>.
</p>
</div>
<b><a name="6.3">6.3 -
<u>How do I import BGL scenery from Microsoft Flight Simulator?</u></a></b>
<div class="indent">
<p>See
<a href="http://matrixsoft.50megs.com/BGL/">http://matrixsoft.50megs.com/BGL/</a>.
</p>
</div>
<b><a name="6.4">6.4 -
<u>How do I design or modify a panel?</u></a></b>
<div class="indent">
<p>See the README.xmlpanel file located in the
<code>FlightGear/docs-mini/</code> directory of the source
distribution. This document is mirrored at
<a href="http://rockfish.net/fg/README.xmlpanel">http://rockfish.net/fg/README.xmlpanel</a>.
</p>
</div>
<b><a name="6.5">6.5 -
<u>How do I place objects, like buildings, into FlightGear?</u></a></b>
<div class="indent">
<p>First, ensure that you have v0.7.7 or later, the scenery files
where you plan to place the object, the actual model, and the
longitude and latitude where you plan to place the object.</p>
<p>Now get the altitude for your point. If you don't want to
calculate this yourself, start FlightGear at your location and take
note of the altitude. Here's an example command:</p>
<p><code>fgfs --lat=45.50 --lon=-75.73 2>&amp;1 | tee fgfs.log</code></p>
<p>The altitude is probably in feet, so divide the starting altitude
by 3.28.</p>
<p>Search the output log file for the first occurrence of the string
"Loading tile" and take note of the filename. In the above example,
the output line looks like:</p>
<p><code>Loading tile /usr/local/Scenery/w080n40/w076n45/1712601</code></p>
<p>Copy a 3D model in a format that Plib understands to the same
directory as the tile file. Edit the text file in that directory
consisting of the tile name with the extension ".ind". The file will
already exist if there is an airport on the tile; otherwise, you can
create it from scratch. In our example, the filename is:</p>
<p><code>/usr/local/Scenery/w080n40/w076n45/1712601.ind</code></p>
<p>At the end of the file, add a new entry for your object,
consisting of the word "OBJECT_STATIC" followed by the model name,
the longitude in degrees, the latitude in degrees, the altitude in
meters, and the heading in degrees. In our example the line looks
like:</p>
<p><code>OBJECT_STATIC Towerax.ac -75.73 45.40 60 0</code></p>
<p>Save the changes to the .ind file, restart FlightGear, and
enjoy.</p>
<p>NOTE: The above information was taken from the following mailing
list post:
<a href="http://www.geocrawler.com/archives/3/11854/2001/6/0/5991409/">http://www.geocrawler.com/archives/3/11854/2001/6/0/5991409/</a>.
See that page if this one doesn't make sense.</p>
</div>
<hr><h2><a name="7">7 -
Flying</a></h2>
<b><a name="7.1">7.1 -
<u>Where can I learn about instrument flying and navigation?</u></a></b>
<div class="indent">
<p>
<a href="http://www.navfltsm.addr.com/">http://www.navfltsm.addr.com/</a>
is a very good site for learning techniques for navigation. Check
it out!</p>
</div>
<b><a name="7.2">7.2 -
<u>What is the difference between Aileron and Rudder?</u></a></b>
<div class="indent">
<p>There is a bit of info on aileron vs. rudder here:
<a href="http://www.arundel.net/xplane/html/crosswind.html">http://www.arundel.net/xplane/html/crosswind.html</a>
and
<a href="http://www.monmouth.com/~jsd/how/">http://www.monmouth.com/~jsd/how/</a>.
</p>
</div>
<hr><h2><a name="8">8 -
FlightGear v0.7.6</a></h2>
<b><a name="8.1">8.1 -
<u>Why do I get an error in viewer.cxx about `exit' being undeclared?</u></a></b>
<div class="indent">
<p>This error cropped up after the release of v0.7.6. To fix the
problem, add "<code>#include &lt;stdlib.h></code>" to the top of viewer.cxx.</p>
</div>
<hr noshade="yes"><a name="about"><h2>About This Document</h2></a><b>FlightGear FAQ</b><br>$Revision$<br>$Date$<br><p><small>
This document generated from XML using
<a href="http://www.gingerall.com/charlie-bin/get/webGA/act/sablotron.act">Sablotron</a>.
</small></p><address>Cameron Moore<br>cameron@unbeatenpath.net<br></address></body></html>