[Flightgear-devel] aircraft search
I've pushed some changes to the aircraft search code, including the --show-aircraft option. We're no longer using PLIB ulDir to traverse directory structures (a couple more steps on the road to kill off PLIB), and aircraft searching is a unified code path - previously the actual --aircraft option and --show-aircraft used unrelated code paths. You will need an up-to-date SimGear (which includes the new simgear::Dir helper), and please let me know if you see any problems with aircraft -set loading; they're going to be apparent very quickly, since locating the -set.xml file happens really early in the startup process. James -- This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] aircraft search
I've pushed some changes to the aircraft search code, including the --show-aircraft option. We're no longer using PLIB ulDir to traverse directory structures (a couple more steps on the road to kill off PLIB), and aircraft searching is a unified code path - previously the actual --aircraft option and --show-aircraft used unrelated code paths. You will need an up-to-date SimGear (which includes the new simgear::Dir helper), and please let me know if you see any problems with aircraft -set loading; they're going to be apparent very quickly, since locating the -set.xml file happens really early in the startup process. Works flawlessly here. Torsten -- This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] weather conditions and winds aloft not working correctly..
Hi Torsten, While we are on the subject, I have two dumb, but related questions ... 1. I do some UAV work and at times collect some real world flight test data. It would be really nice to be able to capture the current metar data off the internet at the time of the flight, save it into some simple form along with the flight data, and then later when I replay the flight data, use the saved metar data for the weather conditions. Is there a way to do this now? Does it work? In the past when I've tried to enter metar strings into the Environment-Weather Scenario dialog box, I haven't been able to get anything to work ... and I'd like to automate this at least through command line options if it's possible? Here's an example video replaying a real flight in FlightGear. http://www.youtube.com/watch?v=toR9UO_Dafc You might notice that partway through the video I turn the smoke emitter on. This is one reason I'd like to have relatively closely matching weather to the original flight conditions ... so that the smoke drift is in the correct direction relative to the crab angle and everything is mostly self consistent. (obviously it won't be perfect if the closest weather reporting station is several miles away and the weather report was from an hour ago, but it's better than nothing ...) 2. This brings me to my second question which might be a bug report? It's my understanding that an aircraft is flying relative to it's local air mass. So if I emit smoke and the smoke drifts in the same air mass, then from the perspective of the aircraft looking backwards, the smoke should come straight out of the tail in line with the aircraft (even if it's crabbing relative to the ground.) What I see instead is that the smoke also drifts relative to the path of the aircraft in the air mass, and this can't possibly be right. The amount of error seems to scale in proportion to how strong the winds are. I think there must be some sort of units conversion or scaling problem (?) when the local wind vector is applied to submodels and particles? Is this issue within your domain as the weather master? Thanks! Curt. On Sat, Jul 17, 2010 at 12:08 PM, Torsten Dreyer wrote: Not the best quality but readable, hopefully those will demonstrate the problems pretty clearly. http://www.flickr.com/photos/jmburbach/sets/72157624393619399/ I'm also unsure why you bring up altitude above ground, as winds aloft are stated above sea level and in true headings are they not? Congratulations! You found a - probably long standing - bug! The environment interpolation did not work above the second layer due to a bug probably introduced by myself some long time ago. Thanks for reporting and the excellent test case with the screenshots. BTW: you don't have to type in your environment setup at every program start, just use the attached file and start fgfs --config=path/to/aloft.xml Please check and report if the issue is gone with the latest git pull. Torsten -- This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel -- Curtis Olson: http://baron.flightgear.org/~curt/ -- This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] weather conditions and winds aloft not working correctly..
Hi all, Here's an example video replaying a real flight in FlightGear. http://www.youtube.com/watch?v=toR9UO_Dafc a little OT but how do I capture those videos? I have a Quad-Core, 2.5 GHz each CPU and a 9500 GT with 512 MB. Roland signature.asc Description: This is a digitally signed message part -- This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] weather conditions and winds aloft not working correctly..
On Sat, Jul 17, 2010 at 1:30 PM, Roland Haeder r.hae...@gmx.de wrote: Hi all, Here's an example video replaying a real flight in FlightGear. http://www.youtube.com/watch?v=toR9UO_Dafc a little OT but how do I capture those videos? I have a Quad-Core, 2.5 GHz each CPU and a 9500 GT with 512 MB. Super low tech method ... I mount my digital camera (canon) to a cheap tripod, line it up, try and get it to focus and then press record ... If I'm going for a natural camera shake effect I might skip the tripod. If I'm going for a, hey I just happened to see this cool thing and pulled out my cell phone effect I might pull out my cell phone ... but it takes really really crappy over compressed movies (and I think a big part of it's compression scheme is to drop tons of frames.) I've played around with ffmpeg and other desktop capture tools, but I must not have a very powerful machine and all these software techniques kill my frame rates. Curt. -- Curtis Olson: http://baron.flightgear.org/~curt/ -- This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] weather conditions and winds aloft not working correctly..
Hi Curtis! Thanks for the quick reply. I also such low tech device, a tripod. Okay, that was to easy. :) Roland signature.asc Description: This is a digitally signed message part -- This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] weather conditions and winds aloft not working correctly..
Hi Curt, without having tested this, it might work like this: Either tie a nasal listener to /environment/metar/data, which contains the raw metar text, and write it's content using nasal to a file. The io module should be able to handle this. Or create a generic protocol writing out /environment/metar/data to a file (this writes the data even if it does not change, however no nasal is required). Playback should work by feeding metar data into the same property either with nasal or the generic protocol. There should be a command line switch -- metar=something to feed an initial metar, but that does not change over time. So, the short answer to your question is: yes it should work with some tweaking. What you observe with drift of smoke, probably the particles emitted from an aircraft use the wind on the ground and not at altitude? I havn't looked at the particle code for ages to tell for sure. I hope this answers your question at least a bit Torsten Hi Torsten, While we are on the subject, I have two dumb, but related questions ... 1. I do some UAV work and at times collect some real world flight test data. It would be really nice to be able to capture the current metar data off the internet at the time of the flight, save it into some simple form along with the flight data, and then later when I replay the flight data, use the saved metar data for the weather conditions. Is there a way to do this now? Does it work? In the past when I've tried to enter metar strings into the Environment-Weather Scenario dialog box, I haven't been able to get anything to work ... and I'd like to automate this at least through command line options if it's possible? Here's an example video replaying a real flight in FlightGear. http://www.youtube.com/watch?v=toR9UO_Dafc You might notice that partway through the video I turn the smoke emitter on. This is one reason I'd like to have relatively closely matching weather to the original flight conditions ... so that the smoke drift is in the correct direction relative to the crab angle and everything is mostly self consistent. (obviously it won't be perfect if the closest weather reporting station is several miles away and the weather report was from an hour ago, but it's better than nothing ...) 2. This brings me to my second question which might be a bug report? It's my understanding that an aircraft is flying relative to it's local air mass. So if I emit smoke and the smoke drifts in the same air mass, then from the perspective of the aircraft looking backwards, the smoke should come straight out of the tail in line with the aircraft (even if it's crabbing relative to the ground.) What I see instead is that the smoke also drifts relative to the path of the aircraft in the air mass, and this can't possibly be right. The amount of error seems to scale in proportion to how strong the winds are. I think there must be some sort of units conversion or scaling problem (?) when the local wind vector is applied to submodels and particles? Is this issue within your domain as the weather master? Thanks! Curt. On Sat, Jul 17, 2010 at 12:08 PM, Torsten Dreyer wrote: Not the best quality but readable, hopefully those will demonstrate the problems pretty clearly. http://www.flickr.com/photos/jmburbach/sets/72157624393619399/ I'm also unsure why you bring up altitude above ground, as winds aloft are stated above sea level and in true headings are they not? Congratulations! You found a - probably long standing - bug! The environment interpolation did not work above the second layer due to a bug probably introduced by myself some long time ago. Thanks for reporting and the excellent test case with the screenshots. BTW: you don't have to type in your environment setup at every program start, just use the attached file and start fgfs --config=path/to/aloft.xml Please check and report if the issue is gone with the latest git pull. Torsten - - This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel -- This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] weather conditions and winds aloft not working correctly..
On Sat, Jul 17, 2010 at 8:16 PM, Curtis Olson curtol...@gmail.com wrote: Hi Torsten, While we are on the subject, I have two dumb, but related questions ... 1. I do some UAV work and at times collect some real world flight test data. It would be really nice to be able to capture the current metar data off the internet at the time of the flight, save it into some simple form along with the flight data, and then later when I replay the flight data, use the saved metar data for the weather conditions. Is there a way to do this now? Does it work? In the past when I've tried to enter metar strings into the Environment-Weather Scenario dialog box, I haven't been able to get anything to work ... and I'd like to automate this at least through command line options if it's possible? Are you maybe looking for the nice metarproxy script (in the utils dir) written by Melchior? ;) -- Csaba/Jester -- This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] weather conditions and winds aloft not working correctly..
Ok, quick test with a new pull and it seems like heading and speeds are working for the layers now. The temperatures don't seem to be taking though, same setup as previous and I was below zero celcius before reaching 9000 feet and already nearly 9 below celcius at 12000 feet. Not sure about other settings, dewpoint, turbulence, etc, didn't play with those yet. I did notice altimeter wasn't coinciding with the input valuesthough to be honest I'm not sure I fully understand how the altimeter values are supposed work over altitude, temperature, etc changes...in flightgear or real life. cheers -- This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
