How to use the JSBSim plugin with Unreal Engine?

[JoinKomorebi]

I recently downloaded the source code of JSBSim on Git, and I want to use this plugin in Unreal Engine. I run the file JSBSimForUnreal.sln first, and then I want to open the project under UnrealEngine, and I encountered the following problem



s
I also tried to use Visual Studio 2019 to compile, but it was still unsuccessful. Do you guys know the reason?Hope you guys can tell me why.thank you very much

[bcoconni]

Did you follow the steps described in the plugin README ?

[JoinKomorebi]

I have tried it all. After I can't open the Unreal project, I generate the solution, and it will report an error when I run it.

[bcoconni]

May be @AlbanBERGERET-Epic or @gallonmate could help you ?

[JoinKomorebi]

Thanks for your help, I have solved the problem

[gallonmate]

When you ran JSBSimForUnreal.sln, was the build successful? The error is saying jsbsim.dll is not found. Check your folder to see what's there. If they are not there, then I'd delete everything and start fresh. This is example of the files you should see in \UnrealEngine\Plugins\JSBSimFlightDynamicsModel\Source\ThirdParty\JSBSim\Lib

[JoinKomorebi]

I found that after I run JSBSimForUnreal.sln the generated file directory is like this。So the log prompt in vs is that the jsbsim.dll file cannot be found.I don't know what's causing it.


s

[AlbanBERGERET-Epic]

The produced files are in libdebug folder, meaning that you built jsbsimforunreal in debug mode.
You need to build it in Release mode.

The libdebug version is in case you want to use jsbsim debug libs in unreal, and for that you need to build the uereferenceApp in DebugGame. In most use case, this is not needed.

=› build jsbsimforunreal in release, and uereferenceApp in development modes.

[AlbanBERGERET-Epic]

The error message is pretty explicit. You need to build jsbsim.dll first. When opened in Visual Studio, you should select and build x64/Release.
Do that first, and in case it fails, share your build log here...

[JoinKomorebi]

Thank you for your answer, I have solved the problem, I have not set to Release version

[ahmadmasoud]

[AlbanBERGERET-Epic]

@ahmadmasoud
My guess is that the copy script fails because there is a space in your path (C:\users\Ahmad Massoud\Documents...)

It could probably be solved by adding a couple of "" around variables in the post-build event script, but generally, having spaces in paths is not recommended. Moreover, long paths (>255 chars) can sometimes be an issue for some scripts or libs (not strictly ue-related).

My recommendation would be to locate your repository somewhere else, without spaces, and with shorter paths.
Like "D:\jsbsim-master" for example.

[gallonmate]

battlegear2099, I can't see your message on github right now. So I assume you solved and deleted your comment? If not solved, then you can just find a github commit from when the UE5 plugin was last updated or try a commit from a week ago. They are currently worked on some string conversion updates for JSBSim, which appear are giving you that error and failed build.

…

On Sun, Jan 1, 2023 at 2:53 PM battlegear2099 ***@***.***> wrote: just looking at this post for the first time, I am attempting build it , jan 23 for jbsim-master unreal and plugin, following the readme info in jbsim and on the forks - build the JSBSimForUnreal.sln under release x64 fails to build on release x64 with error at bottom so no unreal dll built. and also unreal plugin fails as result I am guessing since there is no dll. is this still the way to do this still via vs 2019 buildtools.xml in vs22 - with vs 2019 build tools 14.29.30136 toolchain is this the same as selecting under vs22 -- 2019 14.29.16.11? in the visual installer under build tools. , or has this been updated to newer buildtools in vs22 and documents have not been updated. I am finding it says It can't find the 14.29.30136 toolchain error in build log and as result fails and switching to old just with regular vs22 in build xml it also fails. this is error what am I missing, 1>FGInputSocket.obj : error LNK2001: unresolved external symbol "double __cdecl atof_locale_c(class std::basic_string<char,struct std::char_traits,class std::allocator > const &)" (?atof_locale_c@ @***@***.******@***@***.***@@v <https://github.com/v> ***@***@***.***@@std <https://github.com/std>@@@z <https://github.com/z>) 1>D:\Documents\Unreal Projects\jsbsim-master\UnrealEngine\Plugins\JSBSimFlightDynamicsModel\Source\ThirdParty\JSBSim\Lib\JSBSim.dll : fatal error LNK1120: 1 unresolved externals — Reply to this email directly, view it on GitHub <#664 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AG27QIOZKK4UXQRJ252QZ43WQHODLANCNFSM5ZPLVDQA> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[seanmcleod]

battlgear2099, @gallonmate I forgot that there is a separate Visual Studio project file for the Unreal stuff, so I only updated standard JSBSim Visual Studio project file. In the meantime @bcoconni has pushed a commit to update the Unreal Visual Studio project file - a8c91ec

[seanmcleod]

And there is a error about something missing that jbsim needs.

@techjunkie2099 that's the whole point about the update to the Visual Studio project file that I mentioned above, i.e. a reference has been added for the new source file so that you won't get an error from the linker. So just pull the repo to get the updated Visual Studio project file.