Closed razza-tu closed 6 years ago
nsubiron
commented
6 years ago Hi @razza-tu,
This seems to be an issue of Unreal Editor, I experienced similar issues in Linux. If you recompile and launch the editor again it should be able to find any classes in your cpp files (in fact you don't need to create the class from within the editor, you can just drop it in the source directory).
You can force a recompile by deleting intermediate folders, launching the "Rebuild.sh" script should work too.
razza-tu
commented
6 years ago Hi @nsubiron,
Thanks for your help so far. I have now:
Created [myclass].cpp and [myclass].h in ~/carla/Unreal/CarlaUE4/Plugins/Carla/Source/Carla
Run Rebuild.sh
This has not resulted in [myclass] appearing in the editor. Am I missing something obvious?
Thanks again in advance!
nsubiron
commented
6 years ago Hi @razza-tu,
Is it possible that you don't have the "Show plugin content" active in the content browser? See https://github.com/carla-simulator/carla/issues/180#issuecomment-361199548.
razza-tu
commented
6 years ago Hi @nsubiron,
Indeed, I did not have the Show plugin content option active in the content browser. Since reading your reply, I have
Enabled that option
Closed CARLA
Run Rebuild.sh
The classes still do not appear. Is there anything else you can think of?
nsubiron
commented
6 years ago Hi @razza-tu,
We are not able to reproduce this.
Which version of Unreal are you using? We found an issue in 4.18, GenerateProjectFiles.sh crashed not generating the Makefiles, thus you might be using an older version of the Makefiles without the new class. Perhaps it also affected 4.17 and we didn't noticed. It should be fixed in master branch now.
To be sure you can remove all intermediate folders inside the Carla plugin, then opening the project directly in Unreal with
$ cd Unreal/CarlaUE4/Plugins/Carla
$ rm -Rf Binaries Build Intermediate DerivedDataCache
$ cd ../..
$ ~/UnrealEngine_4.18/Engine/Binaries/Linux/UE4Editor "$PWD/CarlaUE4.uproject"Hi @nsubiron ,
Firstly, I'd like to confirm that I am using Unreal 4.17, as recommended.
Secondly, I have now followed your instructions:
The contents of ~/carla/Unreal/CarlaUE4/Plugins/Carla now reads as follows:
CarlaServer/
Content/
Resources/
Source/
Carla.uplugin
The last command brings up an Unreal Engine dialogue box, telling me that that Carla is incompatible with my Unreal version. I was asked if I wanted to disable the Carla plugin, and upon declining, I was asked if I wanted to rebuild libUE4Editor-Carla.so
I modified the command to read: ~/UnrealEngine_4.17/Engine/Binaries/Linux/UE4Editor "$PWD/CarlaUE4.uproject"
I ran this command from ~/carla/Unreal/CarlaUE4
Attempting the Unreal prompted rebuild resulted in failure
nsubiron
commented
6 years ago Just to clarify, master branch has been updated to UE4.18 while stable branch is still at UE4.17.
Can you share what it prints in the output?
simmates
commented
6 years ago Has anyone used Qtcreator or Eclipse to write code? In Qtcreator I always get strange warnings and errors from the analyzer.
nsubiron
commented
6 years ago I haven't tried those, but Unreal generates a lot of code for reflection that is very difficult for any analyzer to parse it properly.
Since 4.18 you have Visual Studio Code on every platform though https://twitter.com/unrealengine/status/930812641068572672
Question
What is the intended mechanism for creating my own classes in CARLA?
Context
Currently, I am opening the CARLA project with the UE4 Editor, navigating to the desired folder, and using UE4's "Create C++ Class" option. When doing so, a (suspiciously) long process starts, and I am eventually told:
The .cpp and .h files appear where I expect them to in the OS file system, but they do not appear in the Unreal Editor. Recompiling the project does not change this. The editor is aware of the files, though; if I retry this process without closing the editor and deleting the .cpp and .h files, the class generation wizard will not allow a new class with the same name to be developed.
The output log reads as follows:
Additional Information OS: Ubuntu 16.04 LTS CPU: Intel® Core™ i7-4770 CPU @ 3.40GHz × 8 GPU: GeForce GTX 760 (192-bit)/PCIe/SSE2 RAM: 16GB Unreal Engine: 4.17 CARLA: 0.7.1 (I think)