ark1320 Posted October 18, 2017 Report Share Posted October 18, 2017 Hi Pete, When debugging some code I found that when reading offset 060C with ipc.readUB(0x060C) for an a/c with a retractable landing gear the value returned was 2 instead of 1 as specified in the offset documentation. Is this just a simple documentation typo, or perhaps is there some additional significance (some characteristic of the landing gear) associated with the "2" versus the "1" ? With a fixed gear a/c the value returned is 0 as expected. Thanks, Al FSX with SP2, FSUIPCv4.971, Win10 Link to comment Share on other sites More sharing options...
Pete Dowson Posted October 18, 2017 Report Share Posted October 18, 2017 I've moved your question from the reference sub-forum where you wrongly posted it, to here, the Support Forum. Please ALWAYS post support questions here, not into the reference subforums where you are lucky I saw it. 6 hours ago, ark1320 said: I found that when reading offset 060C with ipc.readUB(0x060C) for an a/c with a retractable landing gear the value returned was 2 instead of 1 as specified in the offset documentation. Is this just a simple documentation typo, or perhaps is there some additional significance (some characteristic of the landing gear) associated with the "2" versus the "1" ? With a fixed gear a/c the value returned is 0 as expected. The value is the SimConnect variable ""IS GEAR RETRACTABLE", and should be BOOLEAN, which in almost all languages is encoded by 0 for FALSE and not 0 for TRUE. Whilst it is convention to set TRUE as 1, it doesn't need to be. FSUIPC doesn't touch the value it gets, it simply places it into offset 060C. I don't know where SimConnect gets the detail for this aspect from, but I assume it is defined in the Aircraft.CFG file somehere. do you get 2 for all aircraft? If it is just the one, look at that file. (of course it might well be in the AIR file for all I know, but that is a binary file so not easily checked). Below, see what the SimConnect reference says about this one. That's the only information supplied about it. Pete Simulation Variable Description Units Settable Multiplayer IS GEAR RETRACTABLE True if gear can be retracted Bool N - Link to comment Share on other sites More sharing options...
ark1320 Posted October 18, 2017 Author Report Share Posted October 18, 2017 Yes, I get the value 2 for a number of different default and add-on a/c. I guess as you say it is a case of non 0 means true. I'll be careful to code accordingly in the future. I don't know how I managed to post in the wrong forum this time -- sorry. Thanks for the help, Al Link to comment Share on other sites More sharing options...
Pete Dowson Posted October 18, 2017 Report Share Posted October 18, 2017 34 minutes ago, ark1320 said: Yes, I get the value 2 for a number of different default and add-on a/c Can you tell me which default ones this occurs with, please? I can't check with FSX+SP2, but with FSX-SE which should be the same. Pete Link to comment Share on other sites More sharing options...
ark1320 Posted October 18, 2017 Author Report Share Posted October 18, 2017 Pete, The default a/c I tried were the Baron 58 and the B737. Al Link to comment Share on other sites More sharing options...
Pete Dowson Posted October 18, 2017 Report Share Posted October 18, 2017 1 hour ago, ark1320 said: The default a/c I tried were the Baron 58 and the B737. Well, I certainly get 1 in 060C for both of those in FSX-SE. So either Dovetail Games fixed some sort of very odd bug in SimConnect (which is very unikely, to be honest), or there's something odd going on in your system. Can you go to the Logging tab in FSUIPC options, and set 060C as type U8 in the "monitor" section on the right, then check "Normal Log". Try those aircraft and show me the results in the FSUIPC4.LOG, please. If they also show 2 then it must be SimConnect, somehow, but if they show 1 then you'd better show me your Lua plug-in so I can take a look. Pete Link to comment Share on other sites More sharing options...
ark1320 Posted October 18, 2017 Author Report Share Posted October 18, 2017 Hi Pete, Below is information from the FSUIPC4.LOG files for the Baron 58 and B737. Al Baron B58 1141 SimConnect_Open succeeded: waiting to check version okay 1141 Trying to use SimConnect Acc/SP2 Oct07 1141 Opened separate AI Traffic client okay 3563 Running in "Microsoft Flight Simulator X", Version: 10.0.61472.0 (SimConnect: 10.0.61259.0) 3563 Initialising SimConnect data requests now 3563 FSUIPC Menu entry added 3594 C:\Users\Al\Documents\Flight Simulator X Files\Default Safe Flight Baron 58 35L KCOS.FLT 3594 C:\FSX\SimObjects\Airplanes\Beech_Baron_58\Beech_Baron_58.AIR 4219 Monitor IPC:060C (U8) = 0 50313 Aircraft loaded: running normally now ... 50313 User Aircraft ID 1 supplied, now being used 50641 System time = 18/10/2017 16:30:02, Simulator time = 11:49:47 (17:49Z) 50641 Monitor IPC:060C (U8) = 2 50641 SimRead: 060C="IS GEAR RETRACTABLE" INT32: 2 (0x00000002) 51406 Aircraft="Beech Baron 58 EPAV" 51641 Starting everything now ... 51719 ASN active function link set 51719 Ready for ActiveSky WX radar with additional data B737 1109 SimConnect_Open succeeded: waiting to check version okay 1109 Trying to use SimConnect Acc/SP2 Oct07 1109 Opened separate AI Traffic client okay 3609 Running in "Microsoft Flight Simulator X", Version: 10.0.61472.0 (SimConnect: 10.0.61259.0) 3609 Initialising SimConnect data requests now 3609 FSUIPC Menu entry added 3625 C:\Users\Al\Documents\Flight Simulator X Files\Default Safe Flight Baron 58 35L KCOS.FLT 3625 C:\FSX\SimObjects\Airplanes\Beech_Baron_58\Beech_Baron_58.AIR 4297 Monitor IPC:060C (U8) = 0 59859 C:\FSX\SimObjects\Airplanes\B737_800_Default_Modified\Boeing737-800.AIR 139719 User Aircraft ID 1 supplied, now being used 140015 System time = 18/10/2017 16:40:14, Simulator time = 11:49:47 (17:49Z) 140015 Monitor IPC:060C (U8) = 2 140015 SimRead: 060C="IS GEAR RETRACTABLE" INT32: 2 (0x00000002) 140797 Aircraft="Boeing 737-800 EPAV" 141000 Starting everything now ... 141094 ASN active function link set 141094 Ready for ActiveSky WX radar with additional data 141156 Plug-in thread table check: Link to comment Share on other sites More sharing options...
Pete Dowson Posted October 18, 2017 Report Share Posted October 18, 2017 2 minutes ago, ark1320 said: 50641 Monitor IPC:060C (U8) = 2 50641 SimRead: 060C="IS GEAR RETRACTABLE" INT32: 2 (0x00000002) Well, that's sure proof it IS a SimConnect bug. Just not serious. A BOOLEAN should be supplied as 0 for FALSE and 1 for TRUE. It must have been changed at some time after SP2. Maybe Acceleration, of FSX-SE. Anyway, if you always treat non-zero as "true" you won't go wrong. Pete Link to comment Share on other sites More sharing options...
ark1320 Posted October 18, 2017 Author Report Share Posted October 18, 2017 22 minutes ago, Pete Dowson said: Anyway, if you always treat non-zero as "true" you won't go wrong. Pete Yes, a good lesson! Thanks very much for the help. Al Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now