[Flightgear-devel] How to control multi aircraft in FG simultaneously?
Hi,everybody.I am doing an project of A-SMGCS(Advanced Surface Movement Guidance and Control Systems). An A-SMGCS should support the following primary functions: a) surveillance; b) routing; c) guidance; and d) control. A-SMGCS should manage all kinds of vehicles(including aircrafts and cars) on airport.So I need to simulate more than twenty aircrafts moving on the airport surface to test A-SMGCS.FG multiplayer can support multi aircrafts to fly together,but that means I need twenty persons to control twenty FG instances.My question is that how can I modify FG to adapt multi aircrafts to run in one instance and I can switch from one aircraft to another to control it.When I control one aircraft ,the others could move automatically. The flightplan can support multi aircrafts,but the scenario is writed in the xml files initially.We can not modify the flightpalan when the FG is running.Could anybody give me some design ideas?Should I use AI module to do that,can FG been modified to support this? Greetings Tangyong - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] why jittering,use external fdm
Hi,everybody.I use these command lines to record a flight,then I replay it. Recording: fgfs --generic=file,out,20,flight.out,playback Playback: fgfs --generic=file,in,20,flight.out,playback --fdm=external but when I replay the flight record,I find the aircraft jittering,the flight is not smooth.why?And in the protocol playback.xml,it does record the aircraft's veolocities and positions etc.Since the position is only record at intervals ,does the FG use the velocity value to display aircraft in the meantime, between records. If FG does this,the flight and aircraft shuld not jitter.Can anybody tell me the reson? Best regards, Tangyong- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] why jittering,use external fdm
Hi Curt, Just as you and Stuart said,the main reason of jittering is the inconsistent frame rate.But I find that if several FG clients connect to a local server ''fgms'',each client can see each other correctly and the flight is smooth,no jittering.Is there no fps varying when we use multiplayer function just like this: Player1 --multiplay=out,10,serveraddress,5002 --multiplay=in,10,myaddress,5002 --callsign=player1 Player2: --multiplay=out,10,serveraddress,5002 --multiplay=in,10,myaddress,5002 --callsign=player2 Then I modify the server to let it don't transmit Player2's velocity and acceleration data to Player1.I find that even I use a very low in/out frequency(1hz) in Player2 while the Player1's in/out =10hz,the Player2's flight still looks very smooth in Player1,no jittering.I don't see much changing than I use Player2's in/out=10hz,and transmit the velocity and acceleration data.why?what the difference bewteen them? Best Regards, -Tangyong I've never tried to play back data recorded with the generic protocol so I don't know all the issues, but Stuart makes some good points. Timing is very critical. Even though you specify an output rate, FlightGear isn't doing this in a separate independent thread (not that a thread would directly help the situation anyway.) FlightGear can only output data once at the end of drawing each frame of graphics. So as Stuart points out, if you are running at a somewhat inconsistent frame rate (let's say varying between 35-45 fps) and you can only output at the end of each frame, then the actual data intervals in your data file will jitter around substantially. Include sim time in your output and look at your dt between each record. I'm certain that the generic protocol makes no attempt to interpolate the incoming data in time. It just just plucks out the next record every 20 hz (or as close to that as it can get) and updates the view. So hear again if your playback frame rates are varying and FlightGear waits until at least 50ms has elapsed before fetching the next data packet, then any jitter at the recording stage is only going to be magnified at the playback stage. When dealing with external animation sources or playback, you *really* need to worry about locking FlightGear into a consistent frame rate (either with sync to vblank ... which is always a good idea ... and/or with the built in frame rate throttler code.) Note that all these mechanism can limit frame rates, but nothing can make FlightGear go faster (short of simplifying the graphics load or improving your hardware.) Take care to ensure you are running with exact, consistent frame rates, and your life will become a lot happier! Curt. -- Curtis Olson - University of Minnesota - FlightGear Project http://baron.flightgear.org/~curt/ http://www.humanfirst.umn.edu/ http://www.flightgear.org Unique text: 2f585eeea02e2c79d7b1d8c4963bae2d 想加入吗？1.9亿用户正在使用网易邮箱 www.126.com - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] FlightGear Book
Can anybody translate the book to English?I think there are more people can read English than German language. -- -- From:Curtis Olson [EMAIL PROTECTED] Date:2007-01-25 06:47:29 To:FlightGear developers discussions flightgear-devel@lists.sourceforge.net Cc:(无) Subject:Re: [Flightgear-devel] FlightGear Book On 1/24/07, Melchior FRANZ wrote: * Curtis Olson -- Wednesday 24 January 2007: http://www.bomots.de/flightgear/index.htm Bomots has just published a FlightGear book in the German language. The title is FlightGear kompakt, ISBN: 3-939316-12-1. Umm, but how is it the official FlightGear-user handbook. In which way is it official? Authorized in any way? Or is it just TFM (The FlightGear Manual) translated? Just marketing speak?! Yes probably ... I guess the first one to publish/print a book gets to call their's official? As long as no one else is publishing anything, who's to complain? :-) It is not a simple translation of the FlightGear manual we have online, it is an original work written from scratch (as best as I can tell.) Regards, Curt. -- Curtis Olson - University of Minnesota - FlightGear Project http://baron.flightgear.org/~curt/ http://www.humanfirst.umn.edu/ http://www.flightgear.org Unique text: 2f585eeea02e2c79d7b1d8c4963bae2d - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] Fw:nbsp;Developmentnb sp;Docs
wiki.flightgear.org -- -- From:Thiago Drechsel [EMAIL PROTECTED] Date:2007-01-24 07:30:14 To:FlightGear developers discussions Cc:(无) Subject:[Flightgear-devel] Development Docs Hi all. I'm new in FGS. Does anybody know where can I find a good documentation about FG development. Thanks in advance Thiago Drechsel - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] Fw:Re:Help,questions about multiplayer
But how about the variable of time,lag,and property.what're their use in FG?If I don't send these information to the fgms,what will happen?When a FG client starts up with '--httpd=5400' and connects to a server, I find that I only can view the FG client's property,but can't modify the property value and update it.So I guess that if the data sending to the FG without containing the property data,it does not offect the display of other client aircrafts,but only means that we can not view the client's property via webviewer.Is that right? And how about the time,and log if I don't send them to the fgms and FG client. Best Regards, Tom -- -- From:Joacim Persson [EMAIL PROTECTED] Date:2007-01-16 12:06:03 To:FlightGear developers discussions Cc:) Subject:Re: [Flightgear-devel] Help,questions about multiplayer On Tue, 16 Jan 2007, tangyong wrote: Hi,everybody. My project need to drive many aircraft to fly autonomouslly using ATC radar data.My radar data contains many aircrafts' flight data.I set up a FlightGear server(fgms) in my local network and what I need to do is just inputing my radar data(each client has a unique callsign) to the fgms.Then the fgms and the FlightGear will do all the thing I need.Is that right? That depends on what it is you need of course. ;) But my problem is that my radar data only contains position information(lat,lon and alt). Then that's all you can display that aren't guessed values. What's the use of these variables in FG? orientation is where the nose of the aircraft is pointing linearVel is it's velocity vector (whereto it's flying) angularVel: angular velocity vector (how it is rotating) and then the corresponging acceleration vectors This data is used for displaying the orientation, velocity and accelerations of the aircrafts in the simulation at the receiver of the datagrams. Since the position is only updated at intervals (shortly after the reception of each datagram), the velocity value is used for displaying it in the meantime, between updates. If velocity was zero but position changes, then the aircraft would jump between positions at each new datagram. If the heading (included in orientation) is zero, the nose of the aircraft will always point north (I presume), regardless of where it's flying. And so on. Of course, that may look funny in the simulation. But that's as good as it can be without any data about orientation, velocity and accelerations. You could simply set the unknown data to zeros to begin with, to comply to the protocol. (and live with aircrafts jumping around with their noses always pointing north and never banking in turns) Or you could try to design an algorithm to calculate/predict/guess them. And then you have to find a compromise between correctness and time delay, according to the sampling theorem. And live with strange flying aircraft each time you guess wrong, depending on how much time delay you can accept. (Aftermath is the only truly exact science.) 独家！网易3G免费邮，还赠送280兆网盘 www.126.com - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] Fw:Re:nbsp; nbsp; Help, questionsnbsp; aboutnbsp; multiplayer
But how about the variable of time,lag,and property.what're their use in FG?If I don't send these information to the fgms,what will happen?When a FG client starts up with '--httpd=5400' and connects to a server, I find that I only can view the FG client's property,but can't modify the property value and update it.So I guess that if the data sending to the FG without containing the property data,it does not offect the display of other client aircrafts,but only means that we can not view the client's property via webviewer.Is that right? And how about the time,and log if I don't send them to the fgms and FG client. Best Regards, Tom -- -- From:Joacim Persson [EMAIL PROTECTED] Date:2007-01-16 12:06:03 To:FlightGear developers discussions Cc:) Subject:Re: [Flightgear-devel] Help,questions about multiplayer On Tue, 16 Jan 2007, tangyong wrote: Hi,everybody. My project need to drive many aircraft to fly autonomouslly using ATC radar data.My radar data contains many aircrafts' flight data.I set up a FlightGear server(fgms) in my local network and what I need to do is just inputing my radar data(each client has a unique callsign) to the fgms.Then the fgms and the FlightGear will do all the thing I need.Is that right? That depends on what it is you need of course. ;) But my problem is that my radar data only contains position information(lat,lon and alt). Then that's all you can display that aren't guessed values. What's the use of these variables in FG? orientation is where the nose of the aircraft is pointing linearVel is it's velocity vector (whereto it's flying) angularVel: angular velocity vector (how it is rotating) and then the corresponging acceleration vectors This data is used for displaying the orientation, velocity and accelerations of the aircrafts in the simulation at the receiver of the datagrams. Since the position is only updated at intervals (shortly after the reception of each datagram), the velocity value is used for displaying it in the meantime, between updates. If velocity was zero but position changes, then the aircraft would jump between positions at each new datagram. If the heading (included in orientation) is zero, the nose of the aircraft will always point north (I presume), regardless of where it's flying. And so on. Of course, that may look funny in the simulation. But that's as good as it can be without any data about orientation, velocity and accelerations. You could simply set the unknown data to zeros to begin with, to comply to the protocol. (and live with aircrafts jumping around with their noses always pointing north and never banking in turns) Or you could try to design an algorithm to calculate/predict/guess them. And then you have to find a compromise between correctness and time delay, according to the sampling theorem. And live with strange flying aircraft each time you guess wrong, depending on how much time delay you can accept. (Aftermath is the only truly exact science.) - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] Help!!! compiling error of fg_server-0.9. 10
I compile the source code of fg_server-0.9.10,use the command lines: # export CXX=g++-4.0 #./configure #make But I get the many error informations like this: fg_server.cpp: In member function 'int FG_SERVER::Init()' fg_server.cpp:105: error: no match for 'operator' in '((LOGOBJECT*)((LOGOBJECT*)((FG_SERVER*)this)-FG_SERVER::m_Log. LOGOBJECT::log(L_ERROR))-LOGOBJECT::operator [with AnyType = const char*](((const char*)FG_SERVER::Init() - )))-LOGOBJECT::operator [with AnyType = const char*](((const char*)failed to create listener socket)) std::endl' logobject.hpp:67: note: candidates are: LOGOBJECT LOGOBJECT::operator(LOGOBJECT (*)(LOGOBJECT)) what is the reson,who can tell me? - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] Fw: Re: Does the wiki. flightgear.org still exist? Why can't ope n the webpage?
I access the wiki.flightgear.org from Chengdu,a southwest city of China mainland.I tried it again,but I failed. -- -- From:Simon Hollier [EMAIL PROTECTED] Date:2006-12-20 22:33:10 To:FlightGear developers discussions flightgear-devel@lists.sourceforge.net Cc:() Subject:Re: [Flightgear-devel] Does the wiki.flightgear.org still exist? Why can't open the webpage? It works for me here too. Where are you trying to access it from? Simon On 12/20/06, Curtis Olson [EMAIL PROTECTED] wrote: On 12/19/06, tangyong [EMAIL PROTECTED] wrote: Does the wiki.flightgear.org still exist?Why can't open the webpage?I have tried many times,but I failed. The page is working for me here right now. Regards, Curt. - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] what's the current multiplayer version in flightgear-0.9.10
I find that there are more than one multiplayer server in flightgear-0.9.10.What's the current multiplayer version in flightgear-0.9.10.Is there any document about it.My project need to input radar data to flightgear to drive many aircrafts to fly autonomouslly.Do I need to rewrite the server,because I just need to send data to a socket port. - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] Does the wiki.flightgear.org still exist? Why can't open the webpage?
Does the wiki.flightgear.org still exist?Why can't open the webpage?I have tried many times,but I failed. - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] How many players does FlightGear multipla yers feature can support?
My project needs more than 200 aircrafts to fly automatically ,all the aircrafts are drived by external flight data.I want want to utilize the multiplayer engines.Can it support so many players?By the way,my FlightGear runs in a PC. - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] Can I use AI flight plan to drive many ai rplanes by external file data
Hi,I want want to dirive many airplanes to fly automatically and all the airplanes' flight information are saved in a file.Stuart gave me an suggestion that I can use the AI sub-system to define the flights I want the aircraft to take,but can I save all my flight information(maybe millions of data of lat,lon and alt) in the flightplan XML files' waypoint section.And can I set many airplanes and flightplans in the \data\AI\aircraft_demo.xml,and how can a airplane know which flightplan responses to him correctly. Another question,I JUST want to all the airplanes fly automatically drived by my data.So I don't want to control any aircraft.But I when I start up the fgfs,I get a aircraft to control by myself.And how can I view any airplane flight in the FlightGear.Just like play Counter-Strike(a computer game),the surveillant can see any player he want to see. - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] How do the subsystem communicate and work together
I found that there are many main() functions in the Flight Gear ,maybe each subsystem has one.My experence is that a programe JUST can have only one main() function.So I guess that all the subsystem can work parallelly and independently,and they communicate with each other through setting and getting the property tree nodes valus.Is that true?Is there anybody can tell me how the subsystem work together with the Flight Gear?Thanks. Tom. - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] How to begin program with the Flight Gear
I am a green hand in Flight Gear,and it's my fist time to touch it.I'v read the readme.introduction,I find that the core of FlightGear is the property tree system.But the introduction is too simple,and I don't know how the Flight Gear work with the property tree.Could you grive me some suggestion about how to begin program with the Flight Gear.What's my first step?Or could you give me some documents about the property tree.Is there some programer guide about how to begin with it.Thank you. Best regard, Tom - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] Fw:Filenbsp; I/Onbsp; problem:whynbsp; ca n'tnbsp; replaynbsp; mynbsp; flignbsp; ht nbsp; innbsp; 10hz
I want to replay my flight,read the flight path information from a file. Fist,I record a flight path at 10 hz,5hz,or 2hz ,just like this: --native=file,out,10,flight1.fgfs and then I relay my flight,but I got a secction error! --native=file,in,10,flight1.fgfs --fdm=external but if I set ,just 1hz like this,that's ok! --native=file,out,1,flight1.fgfs --native=file,in,1,flight1.fgfs --fdm=external why,is it because fgfs can't read the file at more than 1hz,it's too fast? otherwise,if I set like this: --garmin=file,out,1000,flight1.fgfs then I replay it,use --garmin=file,in,1000,flight1.fgfs --fdm=external it' ok,but the image is dithering.why? Is it because I should set the hz=a very large number 年 末 数 码 1 0 0 元 专 场 ( 图 ) 百 种 数 码 精 品 1 9 元 起 1 0 0 元 封 顶 , 不 抢 真 的 悔 死 你 ( 图 ) - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] How to drive multiplanes using external d ata
My project need to drive multiplanes using external data saved in a file.Does I have to study the multiplayer protocol?How to abuse that system to introduce additional aircraft into the scene. - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
