Re: [Flightgear-devel] auto-coordination

2012-03-09 Thread Adam Dershowitz, Ph.D., P.E.
Few, but at least one:

http://en.wikipedia.org/wiki/ERCO_Ercoupe


--Adam



On Mar 9, 2012, at 12:05 PM, Curtis Olson wrote:

 The counter argument here is that the existing auto coordination system is 
 nothing more than one line of code that forces some rudder deflection in 
 proportion to aileron deflection -- basically implementing some sort of hard 
 linked manual system.  I am sure there are very few (if any?) real life 
 aircraft rigged in such a way.
 
 Curt.
 
 
 On Fri, Mar 9, 2012 at 1:57 PM, Renk Thorsten wrote:
  Ok I haven't entirely given up on the idea of removing the
  auto-coordination from the code.
 
 Why?
 
  Wouldn't it be more appropriate to add
  that rudder control to controls.nas?
 
 Nasal runs per graphical frame, FDMs may need to run faster at low 
 framerates. Nasal AP systems tend to become unstable below 15 fps or so (see 
 the F-14b).
 
  Then it can be replaced if need be on a per aircraft basis , but not
  break anything otherwise.
 
 You can replace it now on a per aircraft basis at the simple expense of 
 setting a single property to false. If the aircraft is equipped with a better 
 system, then that system can do so. Why is that a problem?
 
  And maybe it could be slip/skid-ball driven ... my whole
  point is NOT to disable it but make it configurable.
 
 Yes, them make it configurable on any aircraft you like. But it should not be 
 absent from any aircraft you haven't touched.
 
 Cheers,
 
 * Thorsten
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Re: [Flightgear-devel] A collection of issues

2011-10-06 Thread Adam Dershowitz, Ph.D., P.E.


On Oct 6, 2011, at 2:33 AM, Vivian Meazza wrote:
 
 
 So, how's it done in practice for weather reports? Is there a precise
 attenuation definition, or is it more or less guestimated?
 
 See
 
 http://www.e-publishing.af.mil/shared/media/epubs/AFMAN15-111.pdf
 
 It is estimated by an observer, or measured by an instrument. You can expect
 the METAR visibility to be a pragmatic estimation of what you will
 experience at the airfield.
 
 

I was up in a control tower a number of years ago talking to a controller.  I 
was told something along the lines of, That mountain is 10 miles away.  If we 
can see it, then we put on the ATIS 10 miles visibility.  That building over 
there is 3 miles.  That tower is 1 mile  

--Adam

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[Flightgear-devel] Instrument in outside view?

2011-09-25 Thread Adam Dershowitz, Ph.D., P.E.
Is there any way to display instruments when using any of the outside views?
For example, can I place an altimeter in the corner of the chase view?  I have 
tried changing some of the view and instrument properties, but it seems like 
the panel is always hidden, except for the actual inside view.  
Any suggestions?

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Re: [Flightgear-devel] Display existing path?

2011-09-24 Thread Adam Dershowitz, Ph.D., P.E.


On Sep 11, 2011, at 10:30 AM, Adam Dershowitz, Ph.D., P.E. wrote:

 Is there any easy way to show a prior route in Flightgear?  In other words, 
 if I have a set of recorded GPS points (lat,long, alt) in a text file can I 
 display them in 3-D space, as I am flying in flightgear?  Ideally I would 
 like points (some box or sphere icon?) connected with line segments.
 There are three different approaches that occur to me, so I figured I would 
 check if anyone has done anything like this, and see if anyone can offer any 
 guidance.
 1)  It is probably possible to generate some custom scenery that has my 
 desired path as custom made objects.  But this seems like it is likely the 
 most difficult approach?
 
 2)  It seems likely that it could be done with nasal, but I have really not 
 done any nasal coding.  One approach might be to hard code a bunch of 
 objects, representing points, in the right locations into a nasal file.  This 
 is not very flexible, as each nasal script would be for a given single path.
 
 3)  Finally, what seems most general would be to write some code in nasal 
 that can read in a csv file, and then to display objects in those locations.  
 Is this feasible?  Can nasal import a csv file or other general file format 
 that could contain points?
 
 If any of you have any existing code, or suggestions, I would love to hear 
 it.  
 
 Thanks,
 
 --Adam
 
 
 


I wrote some NASAL to accomplish this, and I thought that I would pass it back 
to the group, as there was some interest (Curt), and I don't have commit 
access.

To use this, put show_points.nas into data/Nasal.
The 4 geometry files go into data/Models/geometry
and finally data is read from a csv file put in fg-aircraft.  I included a 
little sample file to show a few points.
To turn this on do:
--prop:/sim/rendering/LLpoints=1 (or change this in flight to turn it on an off)
You can change the interpolated points, between the actual points, by doing:  
--prop:/sim/rendering/LLpointsInterp=50.  By default there is effectively no 
interpolation, only the actual points are displayed.  A value of 50 will put a 
point every 50 meters, in a straight line between the existing points.
Finally, you can change the data file name (although not the path) with 
--prop:/sim/rendering/LLfile=latlong.csv (although this is the default value).  
The sample lat/long file will put a few points around SFO, just for demo 
purposes.

I hope that this is helpful.  




show_points.nas
Description: Binary data
37.6139,-122.3586,50
37.6140,-122.3670,75
37.6137,-122.3650,100
37.6175,-122.3678,200
37.6204,-122.3739,100


trackpoint.ac
Description: Binary data


trackpoint.xml
Description: XML document


volume.ac
Description: Binary data


volume.xml
Description: XML document
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Re: [Flightgear-devel] Mac 2.4 binary crashes

2011-09-15 Thread Adam Dershowitz, Ph.D., P.E.


On Sep 13, 2011, at 1:34 PM, James Turner wrote:

 
 On 13 Sep 2011, at 19:53, Adam Dershowitz, Ph.D., P.E. wrote:
 
 I just downloaded the new 2.4 release for Mac.  If I try to launch the app, 
 it just immediately quits.  
 I can successfully run this version of FlightGear from the command line, so 
 the problem must be with the launcher.  I am not sure the best way to report 
 this, so I am starting here.  
 Running on Macbook Pro 10.6.8.
 
 I'm guessing you don't get any kind of crash report? Check Console.app for 
 the system message log, hopefully there's something there about RubyCocoa 
 (which the launcher is built upon)
 
 Regards,
 James
 
 
 

I also tried to run this on the Command line:  
/Applications/FlightGear.app/Contents/MacOS/FlightGear
and I get the same errors that showed up in my console log.  If I also add -v 
to the command line I get this:

/Applications/FlightGear.app/Contents/MacOS/FlightGear -v
2011-09-15 13:21:34.388 FlightGear[81847:903] *** __NSAutoreleaseNoPool(): 
Object 0x208a10 of class NSThread autoreleased with no pool in place - just 
leaking
ruby 1.8.7 (2009-06-12 patchlevel 174) [universal-darwin10.0]
(eval):5: warning: discarding old Fail
(eval):7: warning: redefine included
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/shell.rb:43:
 warning: method redefined; discarding old debug=
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/shell.rb:107:
 warning: method redefined; discarding old debug=
/Applications/FlightGear.app/Contents/Resources/SearchableOptions.rb:46: 
warning: instance variable @table not initialized
/Applications/FlightGear.app/Contents/Resources/SearchableOptions.rb:46: 
warning: instance variable @table not initialized
/Library/Frameworks/RubyCocoa.framework/Resources/ruby/osx/objc/oc_wrapper.rb:17:in
 `NSApplicationMain': NSApplicationMain - 
RBException_OSX::OCMessageSendException - NSCFString#+: - methodSignature is 
nil. (OSX::OCException)
from /Applications/FlightGear.app/Contents/Resources/rb_main.rb:38

Does that help at all to make sense of the cause?

Thanks,

--Adam


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[Flightgear-devel] Mac 2.4 binary crashes

2011-09-13 Thread Adam Dershowitz, Ph.D., P.E.
I just downloaded the new 2.4 release for Mac.  If I try to launch the app, it 
just immediately quits.  
I can successfully run this version of FlightGear from the command line, so the 
problem must be with the launcher.  I am not sure the best way to report this, 
so I am starting here.  
Running on Macbook Pro 10.6.8.

Thanks,

--Adam




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Re: [Flightgear-devel] Mac 2.4 binary crashes

2011-09-13 Thread Adam Dershowitz, Ph.D., P.E.
No crash report.  What shows in console is pretty minimal:

9/13/11 3:03:56 PM  FlightGear[28537]   *** __NSAutoreleaseNoPool(): 
Object 0x208a10 of class NSThread autoreleased with no pool in place - just 
leaking
9/13/11 3:03:59 PM  [0x0-0x532532].net.sourceforge.macflightgear[28537] 
/Applications/FlightGear.app/Contents/Resources/OptionParser.rb:262:in 
`NSApplicationMain': NSApplicationMain - 
RBException_OSX::OCMessageSendException - NSCFString#+: - methodSignature is 
nil. (OSX::OCException)
9/13/11 3:03:59 PM  [0x0-0x532532].net.sourceforge.macflightgear[28537] 
from /Applications/FlightGear.app/Contents/Resources/rb_main.rb:38
9/13/11 3:03:59 PM  com.apple.launchd.peruser.501[285]  
([0x0-0x532532].net.sourceforge.macflightgear[28537]) Exited with exit code: 1



--Adam



On Sep 13, 2011, at 1:34 PM, James Turner wrote:

 
 On 13 Sep 2011, at 19:53, Adam Dershowitz, Ph.D., P.E. wrote:
 
 I just downloaded the new 2.4 release for Mac.  If I try to launch the app, 
 it just immediately quits.  
 I can successfully run this version of FlightGear from the command line, so 
 the problem must be with the launcher.  I am not sure the best way to report 
 this, so I am starting here.  
 Running on Macbook Pro 10.6.8.
 
 I'm guessing you don't get any kind of crash report? Check Console.app for 
 the system message log, hopefully there's something there about RubyCocoa 
 (which the launcher is built upon)
 
 Regards,
 James
 
 
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[Flightgear-devel] NASAL permissions

2011-09-13 Thread Adam Dershowitz, Ph.D., P.E.
I seem to have run into a problem with NASAL permissions.
I have a script that is giving me permission errors when it runs.  The scrip is 
in data/Nasal.  It contains this line:
var file=io.open(data/latlong.csv,mode=r);

and gives this error:

Nasal runtime error: io.open(): opening file 'data/latlong.csv' denied 
(unauthorized access)

Here is FG_ROOT:
FG_ROOT=/Applications/FlightGear.app/Contents/Resources/data

and this line is in data/Nasal/IOrules:

READ ALLOW $FG_ROOT/*
(default value, I haven't changed that file).

Shouldn't the rule allow the script to read that file?  

If I run the script right at the start of flightgear, that part works.  But, it 
won't then do what I want.  If, instead I use _setlistener, as I believe is the 
best way to way to wait for things to be initialized before running, I get the 
above error.  

I did figure out a work around, which is to open the file when the script is 
first run.  But then use _setlister to wait until the correct time to read the 
file.  

Any clarification or explanation?  

Thanks,

--Adam




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Re: [Flightgear-devel] NASAL permissions

2011-09-13 Thread Adam Dershowitz, Ph.D., P.E.


On Sep 13, 2011, at 4:17 PM, Csaba Halász wrote:

 On Wed, Sep 14, 2011 at 12:37 AM, Adam Dershowitz, Ph.D., P.E.
 adershow...@exponent.com wrote:
 
 I have a script that is giving me permission errors when it runs.  The scrip 
 is in data/Nasal.  It contains this line:
var file=io.open(data/latlong.csv,mode=r);
 
 Try this:
 var file=io.open(getprop(/sim/fg-root) ~ /latlong.csv,mode=r);
 

That does it.  

Thanks,


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[Flightgear-devel] Display existing path?

2011-09-11 Thread Adam Dershowitz, Ph.D., P.E.
Is there any easy way to show a prior route in Flightgear?  In other words, if 
I have a set of recorded GPS points (lat,long, alt) in a text file can I 
display them in 3-D space, as I am flying in flightgear?  Ideally I would like 
points (some box or sphere icon?) connected with line segments.
There are three different approaches that occur to me, so I figured I would 
check if anyone has done anything like this, and see if anyone can offer any 
guidance.
1)  It is probably possible to generate some custom scenery that has my desired 
path as custom made objects.  But this seems like it is likely the most 
difficult approach?

2)  It seems likely that it could be done with nasal, but I have really not 
done any nasal coding.  One approach might be to hard code a bunch of objects, 
representing points, in the right locations into a nasal file.  This is not 
very flexible, as each nasal script would be for a given single path.

3)  Finally, what seems most general would be to write some code in nasal that 
can read in a csv file, and then to display objects in those locations.  Is 
this feasible?  Can nasal import a csv file or other general file format that 
could contain points?

If any of you have any existing code, or suggestions, I would love to hear it.  

Thanks,

--Adam




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Re: [Flightgear-devel] Ridding Multiplayer of Abusers

2010-10-19 Thread Adam Dershowitz, Ph.D., P.E.
Instead of trying to put together a list, you should watch a video of George 
Carlin's Seven dirty words.  
Censorship is not the solution to this kind of problem.  
It is just too easy to come up with a way to be offensive, or to threaten 
someone.  If you decide to censor, then YOU take the responsibility for 
anything that is not censored, since it is now approved by the filter.  If 
the response is that the filter doesn't do a good job, then what is the point?


http://en.wikipedia.org/wiki/Seven_dirty_words
http://en.wikipedia.org/wiki/George_Carlin
http://www.youtube.com/watch?v=3_Nrp7cj_tM


--Adam



On Oct 19, 2010, at 7:07 AM, Curtis Olson wrote:

 Oh dear ...
 
 http://www.noswearing.com/dictionary
 
 I was going to say that we could probably do a pretty good job at coming up 
 with a list ourselves, then I saw this site and realized I'm a complete 
 novice ...
 
 Could we also filter at the MP server level?  It might be nice to filter at 
 the sending level so you could give the user some positive feedback if they 
 type something that won't get passed along.  But as imperfect (and possibly 
 entertaining) as any list would be, it might not be a bad idea to do some 
 basic screening of the more common words.  That stuff is unnecessary and in 
 real life you'd probably get your license yanked if you were caught using 
 foul language on the radio.
 
 As with the rest of life, it's nice to run a 100% completely open and free 
 system, until a few idiots start abusing the privilege and then we are forced 
 to start clamping down. :-(
 
 Another thought.  I know it would be a huge effort to setup a system with 
 user id's and passwords, self registration, captcha's, email verification, 
 etc.  Even more interesting if we want a distributed authentication system on 
 top of our distributed mp server system.  But if we could expand the MP 
 system to include a user id with the intent of eventually tying this to a 
 user account/authentication system, then we could flag and identify abusers.  
 We might have some developers or participants who are really good at this 
 stuff and would love to setup a system???  If we developed it in parallel, we 
 could still have the current system running by default as we bring an 
 authenticated system on line.  Then we'd be able to determine if the 
 authenticated system works well, makes sense, helps address abuse, etc.  And 
 at some point when it's working well, we could cut over to it.  Or 
 individuals could make their own personal decision about which system to run 
 on (hopefully the tide would shift over to the authenticated system.)
 
 Abuse could involve more than language or threats on the chat system.  It 
 might be worth slapping someone for leaving their AN-225 parked at the end of 
 28R at SFO for 3 days straight or perhaps doing other things intentionally to 
 disrupt the realistic flight experience of others on the system.
 
 I know we have some good php/mysql jockies in this project ... I don't think 
 we need to be cryptographically secure in our system.  Just thinking out loud 
 here: maybe the mp server computes a random key of the day (16bit or 32bit 
 random number).  You have to authenticate with user name/password to get the 
 key, and then there would be a slot in every output MP message from your 
 system for this key.  (This would all be handled internally to FlightGear 
 some how ... maybe you could set your username/password via command line 
 options or properties in the config file, or set them in a dialog box and 
 then they'd be saved in your autosave.xml file.)  Messages that don't have 
 the matching key would be silently discarded.  Sure this could be hacked, but 
 I think some basic simple levels of authentication would take care of 99.99% 
 of the riff raff.
 
 Regards,
 
 Curt.
 
 
 On Tue, Oct 19, 2010 at 7:56 AM, Stuart Buchanan wrote:
 On Mon, Oct 18, 2010 at 5:01 AM, Jack Mermod wrote:
  Hi Everybody,
  I recently was on Multiplayer, flying with a friend, minding my own
  business, when another pilot asked a general newbie question: Where can I
  find the Nimitz?. In only good intent, I replied: Look around the Golden
  Gate Bridge, you'll find it eventually. The pilot then proceeded to
  criticize my short answer(typing long detailed replies isn't easy when
  you're trying to land on a carrier), and soon began insulting me, using
  foul, profane language, and finally proceeded to threaten to come to my
  house and kill me and my family.(I'm 68 and I even learned some things!)
 snip
 
 I thought you were 24 (based on your forum profile)?
 
 One fairly easy option would be to filter MP chat messages in nasal
 based on a set
 of unnacceptable words. We could do this on the receiving client and simply
 not display such messages. I've been thinking this would be a good idea to
 make the FG MP environment more child-friendly anyway.
 
 I'd also be tempted to filter on the sending client as well, and not
 allow a message
 to 

Re: [Flightgear-devel] Proposed new set of splash screens

2010-02-19 Thread Adam Dershowitz, Ph.D., P.E.


On Feb 19, 2010, at 1:01 AM, Martin Spott wrote:

 Very nice - just this one makes me wonder:
 
 http://home.telfort.nl/sp004798/emh/Splash1.png
 
 Glider in controlled airspace overhead a really large international
 airport !?  ;-)
 

Legal with a transponder and appropriate calls to ATC.  

The pictures look good.

--Adam

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Re: [Flightgear-devel] multiple --generic record/playback errors

2010-02-09 Thread Adam Dershowitz, Ph.D., P.E.
A while back I was trying to read in lat/long and found a lot of jitter.  
I finally found that FG generic was actually only able to read in floats.  At 
that time I found that the designation in the format was just being used for 
output of variables.  But for input they were being put into the actual 
property tree as a float (even if they were read as a double).  I believe that 
the problem was in generic.cxx and both FG_DOUBLE and FG_FLOAT were being 
treated the same way and being set with prop-setFloatValue(float)val);  

I believe that back then I posted a fix that was incorporated, but now I 
wonder

--Adam



On Feb 9, 2010, at 11:43 AM, Curtis Olson wrote:

 Hi John,
 
 The first thought that comes to mind is to double check the precision 
 (significant digits) of the data you are writing out.  If you are writing out 
 heading for instance with 0 or 1 decimal digits or position with 4 decimal 
 digits, that could account for this sort of thing.  
 
 Regards,
 
 Curt.
 
 
 On Tue, Feb 9, 2010 at 1:37 PM, John Denker wrote:
 Has anybody used the --generic record/playback feature
 recently?
 
 It seems to have some very noticeable bugs:
 
 
 When using the --generic record/playback feature, I
 observe numerous view-related problems:
 
  * Helicopter view: the size of the aircraft throbs
  at a high rate, getting bigger and smaller many
  times per second. This makes this view unusable.
 
  * Chase view: similar throbbing. This makes this
  view unusable.
 
  * Chase view without yaw: the azimuthal direction
  of view shudders, shifting left and right by a
  large amount many times per second. Both the
  aircraft and the scenery shudder. This makes this
  view unusable.
 
  * Cockpit view: small but distracting weird changes
  in heading, especially at low speed, as when taxiing.
 
 
 --
 
 When using the --generic record/playback feature, the
 engine starter does not engage when the “s” key is pressed.
 
 FWIW I was able to start the engine by using the property
 browser, setting its running property and then giving it
 some rpm.
 
 -
 
 When using the --generic record/playback feature, the hud is
 visible in the helicopter view, the chase views, and the
 tower views, which looks quite silly.
 
 When using the --generic record/playback feature, when
 playback reaches end of file, it prints on the console at
 a high rate an endless stream of errors:
 Error reading data.
 Error reading data.
 Error reading data.
 Error reading data.
 Error reading data.
 
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 Curtis Olson: http://baron.flightgear.org/~curt/
 --
 SOLARIS 10 is the OS for Data Centers - provides features such as DTrace,
 Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW
 http://p.sf.net/sfu/solaris-dev2dev___
 Flightgear-devel mailing list
 Flightgear-devel@lists.sourceforge.net
 https://lists.sourceforge.net/lists/listinfo/flightgear-devel

--
SOLARIS 10 is the OS for Data Centers - provides features such as DTrace,
Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW
http://p.sf.net/sfu/solaris-dev2dev___
Flightgear-devel mailing list
Flightgear-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/flightgear-devel