On 11-07-14 04:16 AM, Stuart Buchanan wrote: > Martin Muc wrote: >> Just trying Flight Gear for the first time today. What a ridiculously >> top-notch open source project. Just awesome. Congrats and thank you to >> everyone who's made it so. > Glad you like it. It's only as good as the people who contribute. > > Sorry I don't have many useful answers for you: >> Now, first question, on the downloads page it says: >> >> "64-bit overlay: If you run 64-bit windows, you can download the >> self >> extracting 64-bit version of FlightGear. This installs over the top of the >> standard 32 bit version so you will need to install that first." >> >> What are the benefits of this? Does it result in faster performance? >> reduce >> memory usage? what? Clearly it is optional since the main >> fgsetup-2.0.0.exe >> has installed an run fine. > Sorry, I don't know the answer to this. FG (used) to have some memory > occupancy > issues when flying long distances, so there might be a benefit from being able > to access more memory, but that's a guess. >> And my main question, has anyone built a mock GPS display in any of the >> cockpits? and if so has anyone thought of simulating, outputting, or logging >> the NMEA GPS ASCII data stream for time, position, heading, speed, >> waypoints, >> etc? > Have a look at the Docs/ directory of your FG install point. From memory (I'm > not at my FG computer right now), there's a README.IO and a README.Protocol > file > which may help. >> I would be interested in adding this feature, so I will mention it on >> -devel, >> but I thought I'd ask on -users first and see if it is already implemented, >> known, used by users who can help/answer before asking developers. >> >> I have checked the FAQ and there's nothing there mentioning GPS, but I just >> did a google search with "site:flightgear.org gps" and these two wiki pages >> http://wiki.flightgear.org/index.php/GPS and >> http://wiki.flightgear.org/GPS_internals mostly answer my question that the >> GPS modelling has been, apparently, thoroughly done. Great. So the only >> question then is has the NMEA ASCII output been considered? >> >> ...answering my own question again, I see NMEA is mentioned as a command >> line >> option here http://wiki.flightgear.org/Command_line_options and I've now >> found >> it in the FlightGear launch Wizard too. Great. >> >> Okay, last question, I just tried sending that NMEA output to a file and it >> has NMEA sentences for GPGSA, GPRMC, and GPGGA. Can it also send GPGLL, >> GPGSV, >> and GPVTG, and if so, how can I enable this? Or is this a -devel question >> and >> I should ask there? > I think this is a -devel question. > > -Stuart Okay I've looked at the code in this section and there are three similar C++ files for nmea, garmin, and A400 (not sure if I'm remembering that last one correctly, I'm at a different machine at the moment).
There is some minor opportunity for code re-use as all three existing source files have NMEA checksum calculators, although this is only 20 or 30 lines of code. For my own purposes (testing other devices that operate in an aircraft), I'll either be modifying the existing nmea source file, or doing a copied-and-modified "nmeagll", say, to include GPGLL, GPGSV, and GPVTG. Is there interest in my contributing this change back? If I just changed how the existing nmea output worked, to add additional lines to the output, would a Release Notes note about the change be sufficient? or it should be added as a new output protocol (e.g. "nmeagll") to have as little effect as possible on anyone currently using nmea? Thanks. Martin ------------------------------------------------------------------------------ BlackBerry® DevCon Americas, Oct. 18-20, San Francisco, CA The must-attend event for mobile developers. Connect with experts. Get tools for creating Super Apps. See the latest technologies. Sessions, hands-on labs, demos & much more. Register early & save! http://p.sf.net/sfu/rim-blackberry-1 _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
