#engine-source | Unreal Source | Page 21

small cobalt Apr 10, 2018, 1:34 AM

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Yes it does.

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They send you an receipt with an Key in it that you use to Activate VAX inside VS

hollow kernel Apr 10, 2018, 1:35 AM

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Thx DevilsD. Apologies for asking this question here.

small cobalt Apr 10, 2018, 1:38 AM

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No worries

high epoch Apr 10, 2018, 9:27 AM

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@ebon junglento I actually started by asking where to post suggestions on the general channel but did not get any answer. I guess I missed #server-feedback. Thanks for pointing it.

warm kiln Apr 11, 2018, 6:16 AM

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Hi, I want to make some minor changes to the source using the 4.18 branch

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But, I want those changes to be considered a "hotfix" for the 4.18 version

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Is there any place I can specify that?

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I don't want the project binaries to become incompatible if I were to use the engine built from source and vice versa

elder falcon Apr 11, 2018, 1:23 PM

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has anyone managed to get include tool to do something?

grizzled breach Apr 11, 2018, 2:58 PM

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Trying to make a pull request, it needs to be from the branch to Remote Master not from my branch merged to local master merged to remote master?

elder falcon Apr 11, 2018, 3:01 PM

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wat

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ideally you would make a branch off your local master (which is currently identical remote master), make your change there, push it to your clone of the repo, then create a pull request for it

grizzled breach Apr 11, 2018, 3:12 PM

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ok made branch off the local master

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Then Forked it to another branch

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So like MyLocalFixBranch

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Then I merged MyLocalFixBranch to the local master branch

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and now? I'm I good to take that local master branch to remote or does it need to be MyLocalFixBranch to remote? @elder falcon

gloomy hamlet Apr 11, 2018, 3:19 PM

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It doesn't matter what the branch is specifically, so long as it exists on your remote fork.

grizzled breach Apr 11, 2018, 3:22 PM

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hmm could not connect to 'origin' when I try PR

gloomy hamlet Apr 11, 2018, 3:29 PM

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How are you doing it, via Github website?

elder falcon Apr 11, 2018, 3:31 PM

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you should not be making a pull request for your master branch since that way you can only have a single pending pr

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(adding more commits to the same branch you made a pr for extends the pr)

grizzled breach Apr 11, 2018, 3:33 PM

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Gitkraken

gloomy hamlet Apr 11, 2018, 3:34 PM

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^good point

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Haven't used Gitkraken so can't help there

grizzled breach Apr 11, 2018, 3:34 PM

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Should I use gitbubs client?

gloomy hamlet Apr 11, 2018, 3:34 PM

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Git for Windows used to suck, no idea if it even supports PRs.

grizzled breach Apr 11, 2018, 3:35 PM

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And I should be making a pull request from my own branch yes?

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Not local master

gloomy hamlet Apr 11, 2018, 3:35 PM

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But once you have your branch as you want it and have pushed updates, you can do the PR directly from your fork on Github website.

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You can't PR from anything local.

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PR is between a branch on your remote fork, and the upstream (original repo), in this case EpicGames/UnrealEngine.

grizzled breach Apr 11, 2018, 4:13 PM

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ok so that is why I'm having a hard time then

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Git Kraken just won't let me push to my remote branch period

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Yeah github client authentication fails as well

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Going to just try again from scratch

final quarry Apr 11, 2018, 6:27 PM

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When a player gets kicked from a session, Epic destroys their player controller to remove them and close the connection, but for me this causes a server crash pretty reliably every 1 out of 30 or so times

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the crash is due to deleting/freeing the sendbunch, it fails the canary test and causes an assert sometimes, update: was due to using non thread-safe functions

grim halo Apr 11, 2018, 8:55 PM

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i need to give a debug name to a render target

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the engine usually does it with macro TEXT()

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but, as I have an array of render targets, i want each one to have its index in the name

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but I can't find a way to cram an integer in a TCHAR, which seems to be the type of string literals

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I can get it into FText but that's not enough

elder falcon Apr 11, 2018, 10:32 PM

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*FString::Printf(TEXT("RenderTarget #%d"), Index)

gray glade Apr 11, 2018, 10:34 PM

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@grim halo Yeah, don't use FText for that. FText is for potentially localizable strings.

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Zeblote has the right of it. Use Printf. It's not as powerful, but it'll do.

hollow kernel Apr 12, 2018, 1:38 AM

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Do people still use UnrealVS?

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On say 4.17+

elder falcon Apr 12, 2018, 1:46 AM

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I use it for the compile startup project button

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no clue if it has other features lol

hollow kernel Apr 12, 2018, 2:33 AM

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@elder falcon Got it. Thanks! Couple years ago a senior Epic programmer said he uses it for hot reloading. Was just wondering if people still use it for that.

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No matter the method used, hot reload times will be the same?

elder falcon Apr 12, 2018, 2:37 AM

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don't use hot reload ever

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it will randomly either not work, crash, or corrupt your stuff

hollow kernel Apr 12, 2018, 2:38 AM

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Good thing I asked. Thanks. Ill stay away from it then...

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Any way to tell exactly which engine version (including path of the engine) a project uses?

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Dirty way, I guess, is to try to Switch the engine version and it'll default on its current.

gray glade Apr 12, 2018, 4:50 AM

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Also, UnrealVS has nothing to do with hot reload.

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It can give you a friendlier batch building UI, it can regenerate project files, and it can let you select the startup project from a drop down + startup arguments.

hollow kernel Apr 12, 2018, 6:07 AM

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@gray glade
Got it. Sorry, I misinterpreted the info on one of plugin creation walkthrough vids.
I'll just consider using it for those 3 tasks then. Thanks!

grim halo Apr 12, 2018, 1:59 PM

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no i need a way to turn a string into a TCHAR

obtuse axle Apr 12, 2018, 2:08 PM

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...you do.

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It's pretty easy though: *MyString

grim halo Apr 12, 2018, 2:10 PM

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I did GetData(String)

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and I was sloppy with my message, I meant TCHAR*

obtuse axle Apr 12, 2018, 2:10 PM

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Yeah, I assumed

grim halo Apr 12, 2018, 2:11 PM

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btw, FString allocates some memory for a string but afaik when it goes out of scope it gets destroyed and the memory is freed

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and since I gave that memory address to the render target pool, that's a recipe for undefined behaviour

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so I also had to make the FString static

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I think that solves it

final quarry Apr 12, 2018, 3:30 PM

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Does anyone know how we go about building an installed build of the unreal editor that supports a custom games code/module for distribution to modder's as an SDK? I'd imagine its a custom buildgraph script but I've been having trouble getting the engine to recognize external modules

sleek sand Apr 12, 2018, 4:32 PM

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if I have a viewproj matrix from which side am I supposed to multiply a vector with it?

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from right, right?

gray glade Apr 12, 2018, 7:52 PM

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Pretty sure there are methods on Matrix to transform a vector.

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So you don't need to fumble with multiplication order.

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Yeah, there is.

merry herald Apr 12, 2018, 8:21 PM

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Hello! Is there any documentation on how to remove unnecesary modules from the engine?

gray glade Apr 12, 2018, 8:26 PM

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There shouldn't be any unnecessary modules in the engine - they're either depended upon or they're not.

merry herald Apr 12, 2018, 8:28 PM

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You are correct, sorry for my misswording. I can manage that through ProjectName.build.cs file right?

gray glade Apr 12, 2018, 8:29 PM

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Yes, you can cut out unnecessary dependencies of your own from there.

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And out of the box, you should have a module with the same name as the project, yes.

merry herald Apr 12, 2018, 8:29 PM

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Awesome, thanks for the help

gray glade Apr 12, 2018, 8:30 PM

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NP

sleek sand Apr 12, 2018, 8:59 PM

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I try to do it in shader

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no function there

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I'll try to see how the c++ one does it tho

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damn macro magic 😄

sleek sand Apr 12, 2018, 9:37 PM

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I think i have to transpose the matrix and then I can use dot products of the matrix rows with the position I wanna transform

warm fox Apr 13, 2018, 2:33 AM

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Do you have to call out your plugins in the UAT build command?

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hmmmm nvm, my error only seems to happen with advancedsessions plugin

hollow kernel Apr 13, 2018, 6:08 AM

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How do people usually check for syntax errors? I got VAX installed, and setup intellisense as specified in the UE4 docs.

Made changes to about 30 different files, and I'm getting this at the end of compile:

ERROR : UBT error : Failed to produce item: C:\Users\Hans\Downloads\UE4.4.18\UE4.418-Release\Engine\Intermediate\Build\Win64\UE4Editor\Development\UE4Editor-Engine.lib

small cobalt Apr 13, 2018, 6:17 AM

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@hollow kernel Check the Output Log you will have an bunch of errors throughout the log.

hollow kernel Apr 13, 2018, 7:26 AM

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@small cobalt
I actually searched the Output log for "error" and "fail" before posting, but fsr it was stopping only on logdatabase error" -Unattended -WarningsAsErrors .

Got it to find the actual errors by clicking on the output window, AFTER bringing up search via ctrl+f. Weird.

Thank you!

stable hemlock Apr 14, 2018, 8:31 PM

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What program do you guys use if you merge branches?
Wanting to merge VRWorks into a branch with lots of other gameworks branches already included: https://github.com/windystrife/UnrealEngine

elder falcon Apr 14, 2018, 8:32 PM

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smartgit, conflict solver is very good

stable hemlock Apr 14, 2018, 8:33 PM

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Thanks. I'll try it out

stable hemlock Apr 14, 2018, 8:53 PM

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@elder falcon I've got both forks in smartgit. What do I click now?

elder falcon Apr 14, 2018, 8:53 PM

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if you want to merge 2 different forks you'd have to add both as a remote to the same repo, then just right click their branches and merge them

stable hemlock Apr 15, 2018, 12:39 AM

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Ok merging is way harder than I thought

elder falcon Apr 15, 2018, 1:01 AM

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you pretty much can't merge if you don't understand what the code in question is doing

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since you have to find a sensible way to make both work for each conflict

stable hemlock Apr 15, 2018, 3:02 AM

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Yeah. I got almost everything together but vrworks. Way too many changes.
I'll just run vrworks by itself

stable hemlock Apr 15, 2018, 7:05 PM

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Trying to build my project. One plugin's DLLs are made with Win64-DebugGame attached to the name. What do I do in VS to just have it compile with its normal name

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Also tried starting the editor from visual studio, and it says my project is out of date no matter what

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Launching from visual studio also gives me this error

📎 iJcWhwd.png

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I have no idea what's wrong or what to do

devout epoch Apr 15, 2018, 7:32 PM

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Looks like a miscompiled shader?

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@stable hemlock Are you able to view that line?

stable hemlock Apr 15, 2018, 7:54 PM

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@devout epoch

void FShader::SetResource(FShaderResource* InResource)
{
    check(InResource && InResource->Target == Target);
    Resource = InResource;
}

devout epoch Apr 15, 2018, 8:02 PM

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Are you able to reproduce the issue?

stable hemlock Apr 15, 2018, 8:05 PM

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Yes.
But I changed what I'm doing. Didn't have any real C++ in my project, so I made it back into a BP project.
Put the plugins into the engine, and then compiled the engine.
After compile I get Binaries for the 'IKinema' plugin are missing or incompatible with the current engine version no matter what.

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I clicked no to disable.
It's stuck at the 45% shader compile part.
I'll see if it starts

devout epoch Apr 15, 2018, 8:07 PM

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Sounds like IKinema is not included in your project's Build.cs

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That's the file that determines what modules are compiled with the main module

stable hemlock Apr 15, 2018, 8:09 PM

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All the binaries were created.
My project doesn't have a build.cs
All other plugins work.

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I do get an error with this line in the IKinemaEditor.Build.cs
Could not find definition for module 'IKinema'
AddEngineThirdPartyPrivateStaticDependencies(Target, "IKinema");
I changed it to IKinemaCore. It now generates project files, but I'm not sure if that's also what's causing the error

devout epoch Apr 15, 2018, 8:14 PM

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Your project absolutely has a build.cs. It's impossible not to.

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Sounds like it's unable to find the IKinema file.

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Can you show a screenshot ofyour Source folder?

obtuse axle Apr 15, 2018, 8:15 PM

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If it's a BP project, they don't have a Build.cs.

stable hemlock Apr 15, 2018, 8:15 PM

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^

obtuse axle Apr 15, 2018, 8:15 PM

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It's definitely not impossible to not have one.

stable hemlock Apr 15, 2018, 8:15 PM

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No source folder either

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Deleted binaries folder before building.
It looks like it made everything correctly.

📎 bvQ4Kz2.png

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Yet they're missing or incompatible

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Even though they were built with the engine my project is running on

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There seems to be a lot of source code in the folder, but I've heard that the plugin doesn't come with the source code.

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Maybe that's were "Ikinema" is missing? I'm not sure

gloomy hamlet Apr 15, 2018, 8:21 PM

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Which configuration did you build the engine for?

stable hemlock Apr 15, 2018, 8:22 PM

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Development I think

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Just found this on their website Note: RunTime Indie is not officially supported in source builds of Unreal Engine.

gloomy hamlet Apr 15, 2018, 8:23 PM

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Not officially supported doesn't mean it shouldn't work though.

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What you've listed there is binaries for a bunch of different configs, which makes me wonder whether they're not old build products. Did you definitely delete the Binaries directory within Engine/Plugins/IKinema (or wherever it was) before you rebuilt?

stable hemlock Apr 15, 2018, 8:25 PM

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I'm sure I deleted it

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The plugin seems to just be split up like that

📎 QZRd90p.png

gloomy hamlet Apr 15, 2018, 8:26 PM

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To get all those files, you'd have had to build the engine on all of Shipping, Development_Game, DebugGame_Game, and Development_Editor.

stable hemlock Apr 15, 2018, 8:27 PM

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Quote from Ikinema support
As per our FAQ we do not actually support source builds of unreal with RunTime Indie. Sometimes there are work arounds which we are ok with pointing at and suggesting to users such as yourself but it isn't something that should be assumed so be supported as we explicitly say on our FAQ page.

gloomy hamlet Apr 15, 2018, 8:27 PM

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What are the timestamps on the files, do they match up with when you rebuilt?

stable hemlock Apr 15, 2018, 8:27 PM

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Ooof

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📎 kPh2WNi.png

gloomy hamlet Apr 15, 2018, 8:28 PM

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Yeah generally they won't support source builds because people may have changed all sorts of stuff. But in most cases, it should work just the same.

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Is that the modified date? It's 3 weeks ago 😉

stable hemlock Apr 15, 2018, 8:31 PM

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Wtf that is three weeks ago

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I just downloaded it today

gloomy hamlet Apr 15, 2018, 8:32 PM

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Right, but aren't these the files you said you deleted before rebuilding?

stable hemlock Apr 15, 2018, 8:32 PM

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Yeah

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My god what a pain in the ass

gloomy hamlet Apr 15, 2018, 8:32 PM

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Well, looks to me like you didn't. Unless you rebuilt 3 weeks ago 😉

stable hemlock Apr 15, 2018, 8:34 PM

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Time for build 12 of the day

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I think the biggest issue is Could not find definition for module 'IKinema' (referenced via Target -> IKinemaEditor.Build.cs) when generating project files

devout epoch Apr 15, 2018, 8:41 PM

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I think I have an idea

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Is IKinemaCore all DLLs?

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In Source

stable hemlock Apr 15, 2018, 8:46 PM

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Is IKinemaCore all DLLs?

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What does that mean @devout epoch

devout epoch Apr 15, 2018, 8:48 PM

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Show me the contents of IKinemaCore

stable hemlock Apr 15, 2018, 8:50 PM

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📎 rDN6HZ6.png

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Public

📎 a2dHHNq.png

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Classes

📎 ViSJgA5.png

gloomy hamlet Apr 15, 2018, 8:51 PM

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Pretty sure you've done the right thing in changing IKinema to IKinemaCore, since the former isn't a module name.

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But it's weird that that discrepancy was in the code to begin with.

stable hemlock Apr 15, 2018, 8:51 PM

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It's in the new 4.19 version too of the plugin

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I've had nothing but problems with this company. This surely doesn't help. lmao

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This is all after it took them a month to find out why my license key wasn't working 😂

gloomy hamlet Apr 15, 2018, 8:52 PM

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It almost seems like you've pulled a non-release version of the plugin source, that isn't in a buildable state.

stable hemlock Apr 15, 2018, 8:52 PM

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Ok. Changed to IKinemaCore and the project files compile.
I can try building now

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That's weird. It's the only option on their download page

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Ok deleted binaries folder. Building

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When I build, it spends most of the time creating shader libraries. Wtf

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Wait is it compiling the engine again?
Oh my god I'm going to die

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The past 4 weeks for me has just been sitting and waiting for builds

gloomy hamlet Apr 15, 2018, 8:56 PM

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Welcome to UE4 source builds

stable hemlock Apr 15, 2018, 8:56 PM

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It's almost not worth it

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6700k and it still takes 35 minutes

devout epoch Apr 15, 2018, 8:57 PM

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Can you show me IKinemaCoreModule.h, the contents of it?

stable hemlock Apr 15, 2018, 8:59 PM

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https://hastebin.com/ucotiqoxab.cs

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Ok project built. Moment of truth

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Brb necking myself

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😑

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How how how how how how. You're literally just built with the only engine version on my computer.

📎 u9rjwUf.png

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Wait

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They're not there

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It didn't make any binaries

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ok wtf ue4

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Now you're playin with me

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Does it have to be in the engine/plugins folder?

devout epoch Apr 15, 2018, 9:03 PM

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@stable hemlock Now show my IKinemaCoreModule.cpp

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That's where the actual name of the module is defined

stable hemlock Apr 15, 2018, 9:04 PM

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There is no IKinemaCoreModule.cpp

devout epoch Apr 15, 2018, 9:04 PM

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It should be in the Classes folder

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I got a window like that recently, the missing decay modules.

stable hemlock Apr 15, 2018, 9:04 PM

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Sent you a pick of the classes folder.

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Not in there

devout epoch Apr 15, 2018, 9:05 PM

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Ah, so it's just the header files because they don't want to give you the source.

stable hemlock Apr 15, 2018, 9:05 PM

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Only headers everywhere

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No source

devout epoch Apr 15, 2018, 9:05 PM

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In my case, the missing modules was because my project's Target.cs file and Build.cs didn't include the module in question

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so it wasn't being compiled along with the project.

stable hemlock Apr 15, 2018, 9:06 PM

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I'll add it

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Without the source, can I even build it?

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Am I forced to use the binary engine?

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Ok. It should know what ikinema core is now. I just shoved it down its fucking throat

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Couldn't open lib files. I'll put the packed lib files into the binaries folder and rename them to what they want (UE4Editor-IKinemaCore.lib)

devout epoch Apr 15, 2018, 9:14 PM

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Reasonable workaround

gloomy hamlet Apr 15, 2018, 9:27 PM

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Okay I didn't realize that. Yeah if you don't have the cpp files, you can't build the plugin.

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So you have to use prebuilt binaries, which won't work with a source built engine.

stable hemlock Apr 15, 2018, 9:31 PM

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I'm shit out of luck?
Fuck

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Can I trick it into thinking it's the binary engine?
I have no idea. Just desperate 😂

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If worse comes to worse, I'll just not use Ikinema. Already got a refund

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Yeah ok I give up

stable hemlock Apr 15, 2018, 10:05 PM

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Ok wtf. I've rebuilt it twice now (without ikinema) and no matter what it says "The following modules are missing or built with a different engine version:" for every single dll

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Just deleted my visual studio project, made a new one. And it's all good

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Probably on the wrong configuration before

thick storm Apr 16, 2018, 7:58 AM

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IKinema do not work with source builds

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just remove the plugin

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and it should work

hollow kernel Apr 16, 2018, 8:35 AM

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I added a ush file to Engine/UE4/Shaders/Private through Solution Explorer.

After having added it, VAX can't find it. Found out Its location, according to Properties, is Engine/Intermediate/ProjectFiles fsr. Any idea why?

hollow kernel Apr 16, 2018, 8:54 AM

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Ah nm. Seems the most convenient way isnt the right way, heh.

gray glade Apr 16, 2018, 2:14 PM

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@hollow kernel You got it. VS Solution Explorer isn't a great way to add files to UE4 projects.

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Reason being that the VS Solution's hierarchy is a mirrored representation of what's in the file system, done when it was generated by Unreal Build Tool.

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It is not a "live" mirroring of the actual file system.

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Meaning there is no real connection/association between the "folder" (actually called a filter in VS) and the folder (as in, file system directory).

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For whatever reason, this causes VS to try to create new files somewhere under "Engine/Intermediate", initially.

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Hmmm... might be able to edit the UnrealVS plugin to add a menu command for that, that'll take the path to the clicked VS Solution Filter and map it to the actual folder.

hollow kernel Apr 17, 2018, 3:53 AM

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@gray glade Thanks a lot for the thorough explanation. It makes perfect sense now.

thick storm Apr 17, 2018, 8:56 AM

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it would be nice to havek CMake project generator for Visual Studio

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since VS support CMake projects

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it would get rid of this awful XML based solution file

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and represent actuall file system

gray glade Apr 17, 2018, 8:57 AM

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I don't know how that would change anything - it's still a Visual Studio project at the end of the day, using the Solution Explorer UI?

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The VSProj files aren't even building directly through VS - they're calling to batch files distributed with UE4 that in turn run the build pipeline, including the VC++ toolset.

thick storm Apr 17, 2018, 9:18 AM

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you cloud add files directly from Visual Studio

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using solution explorer

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because it would represent just file system

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idk for me it would be big workflow improvment

elder falcon Apr 17, 2018, 9:21 AM

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that could also be done without involving unnecessary cmake files

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just remove this virtual folder nonsense that noone uses

gray glade Apr 17, 2018, 9:21 AM

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Hmmm. I think I'm just misunderstanding what you mean about changing to cmake.

elder falcon Apr 17, 2018, 9:22 AM

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why does vs need to make virtual folders in the solution anyways

gloomy hamlet Apr 17, 2018, 9:22 AM

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Yeah I don't follow what workflow? Are you just talking about the default location for files from the right click add item menu?

gray glade Apr 17, 2018, 9:22 AM

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Does Visual Studio support CMake "projects"? As in, it's a totally different kind of project from a "VC" project?

thick storm Apr 17, 2018, 9:22 AM

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yes it's different

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default VS Solution is using virtual folder (Filters)

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which have no mapping to actuall file system

elder falcon Apr 17, 2018, 9:23 AM

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it does, the solution explorer shows a directory tree then instead of virtual folders

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which is way more useful

thick storm Apr 17, 2018, 9:23 AM

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I can't right click on Filter add file and expect it be in the same folder as filter

gray glade Apr 17, 2018, 9:23 AM

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Right, but the whole filters thing, isn't hat just VS Solutions in general, not specifically VC Projects? Hmmm

thick storm Apr 17, 2018, 9:23 AM

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it's specific to VC

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in C# you "filters" map directly file system

gloomy hamlet Apr 17, 2018, 9:24 AM

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Yeah, C# behaves differently.

gray glade Apr 17, 2018, 9:24 AM

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Ah. Been so long since I touched C# in VS, I didn't even remember that.

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Yeah, lame.

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Actually, wait.

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I think part of it is to keep all the generated cruft out of the Solution Explorer too.

thick storm Apr 17, 2018, 9:24 AM

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it's legacy system because for lot of time VC++ build system cloud not handle files in seprate folders

gray glade Apr 17, 2018, 9:24 AM

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But still - there are surely improvements that can be made one way or another.

gloomy hamlet Apr 17, 2018, 9:25 AM

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I actually came across this when writing my VS extension. Under the hood VS has a distinct notion of the two types of folders in its solutions, virtual filter or file system.

gray glade Apr 17, 2018, 9:25 AM

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Huh

thick storm Apr 17, 2018, 9:25 AM

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still Unreal is better than what I have to deal at work with

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when we use pure VS solution over perforce

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so if you merge vcproj or solution file wrong

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you lost all filters -;-

gloomy hamlet Apr 17, 2018, 9:27 AM

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Although in terms of workflow difference, I think you could get what you want via an extension without a need for a change in the project system.

thick storm Apr 17, 2018, 9:28 AM

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wasn't there option to show file system in VC++ solution explorer ?

gloomy hamlet Apr 17, 2018, 9:29 AM

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I had a feeling there was too for some reason. I think I looked at one point briefly and didn't come across it, but it may well be there somewhere.

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I've used VC++ for 20 years, still don't know what most of the shortcut buttons are for ;)

gray glade Apr 17, 2018, 9:30 AM

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📎 unknown.png

thick storm Apr 17, 2018, 9:30 AM

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doesn't work ;s

gloomy hamlet Apr 17, 2018, 9:30 AM

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Doesn't that one just flatten everything?

gray glade Apr 17, 2018, 9:30 AM

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Doesn't do what it seems like it would do, though.

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Correct, it flattens.

gloomy hamlet Apr 17, 2018, 9:30 AM

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Only know because I clicked it by accident recently!

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https://visualstudio.uservoice.com/forums/121579-visual-studio-ide/suggestions/18483193-allow-to-completely-disable-filters-based-layout-f

UserVoice

Anonymous

Allow to completely disable filters-based layout for C++ projects

At the moment, Visual Studio uses a strange filter-based project layout for C++ projects. Filters don't correspond to real folders in filesystem. In most cases, this leads to need to organize files twice - first, in filesystem, and second, as a s...

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Seems sensible and very achievable. So no doubt it will never happen.

thick storm Apr 17, 2018, 9:37 AM

#

pretty much

#

I've seen such requests at least since 2014

#

in VS 2017 there is folder view

#

which well

#

kind of works

#

but you need to keep you game project beside you engine folder

#

to have access to engine sources

elder falcon Apr 17, 2018, 9:40 AM

#

huh

#

folder view sounds very useful

gloomy hamlet Apr 17, 2018, 9:49 AM

#

Um, yeah. That seems to do exactly what we were discussing actually 😉

#

What about that isn't what you're after @thick storm ?

#

Just the lack of engine source? Doesn't seem a big deal to me to just click to switch back if you need to find an engine file.

#

It even seems to be smart enough to not show intermediate and binary folders. Could be using my git repo for that, not sure.

thick storm Apr 17, 2018, 10:21 AM

#

it actually works as intended

#

and keeping game source beside engine seems like one of the workflows anyway

#

but

#

you still need to switch to solution view to build project ;s

elder falcon Apr 17, 2018, 10:27 AM

#

can use the build startup button from unrealvs or just hit f5

gloomy hamlet Apr 17, 2018, 10:37 AM

#

Hmm, yeah F5 doesn't do anything for me when in folder view. That's a killer.

coral flame Apr 17, 2018, 6:03 PM

#

Hello guys, is this the right channel to ask about Draw Calls/Performance/Optimization??
I'm wondering if you could help me to understund how Unreal Engine works related to Draw Calls, why a simple Cube with a Default Material without shadows costs 2 Draw Calls instead of 1

elder falcon Apr 17, 2018, 6:24 PM

#

got prepass enabled maybe?

coral flame Apr 17, 2018, 6:34 PM

#

How to disable it? Not finding it 😛

coral flame Apr 17, 2018, 7:03 PM

#

Case 1: 1 Mesh with 2 IDs for materials costs 3 Draw Calls. If I make it a blueprint it costs 4 draw calls.
Case 2: A merged actor forming a house with 10 IDs for materials, costs 14 draw calls. If i make it a blueprint nothing changes

#

Some explanation?

open zodiac Apr 17, 2018, 10:21 PM

#

Anyone know the source code location for ue4editor-cmd.exe>

#

?

stable hemlock Apr 18, 2018, 12:34 AM

#

@iniside#8930 "Just remove the plugin" lmao

torn cloak Apr 18, 2018, 3:09 AM

#

hahaha i totally missed this chat im dumb

#

hey guys does anyone know why ACharacter is getting destroyed when it's no longer netrelevant then recreated when it is?

#

i need to recreate that behavior for other actors and disable it for other characters because of optimization reasons

thick storm Apr 18, 2018, 7:31 AM

#

@stable hemlock guys from IKinema are adamant about their plugin not working with source build

#

someone on older version got it working

#

but they were quick "fix" it in next release of plugin

#

my advice don't support bad practices and try different plugin.

hidden hedge Apr 18, 2018, 8:21 PM

#

if you're a middleware company i don't think you should put business secrets in your UE4 plugin for that reason

grim halo Apr 19, 2018, 5:32 PM

#

anybody know what BasePassSelfShadowedTranslucencyDrawList ( and the other draw lists that can be obtained by FScene::GetBasePassDrawList ) do? 4 of these are declared but only the one for uniform lightmaps is ever used in the source as far as I can see

#

edit: it's possible for meshes to be added to this drawlist, but they never get accessed for rendering them ever again with the exception of BasePassUniformLightMapPolicyDrawList

hybrid night Apr 19, 2018, 8:04 PM

#

UBT is picking up 2017 preview now that I have it installed, rather than picking 'stable' 2017 .. anyone know if there's a way to fix that? Seems preview does not quite compile latest 4.19 yet

sick basin Apr 20, 2018, 5:49 AM

#

Greetings guys! Please save my life!
I made a small change to my c++ code, hit compile.
"Performing 36 actions" no problem.
And an error occured because I forgot to check out a certain binary file on source control.

Okay files check out, hit compile

#

📎 unknown.png

#

Now it's compiling the entire engine. I didn't change anything at all.
This has happened a few times. (not only caused by not checked out from source control)
Anything remotely resembles an idea of what's going on will help me a lot!

#

Sorry for double posting from #c++

slow ibex Apr 20, 2018, 9:05 AM

#

Hi everyone, I hope someone can help me, it's days that I'm hitting a wall 😖
I'm trying to compile the Engine my client is using, v4.15, I've run the Setup.bat succesfuly, but when I start compiling the UnrealFrontend project start yelling at me for what it looks like "missing prerequisites" and from that point on other 10 projects failed, here's the screenshot of the error... I really don't know what to do...

📎 error.PNG

#

I tried that too, nothing changed 😦

#

I also try to manually run the installers that Setup.bat calls... nothing 😢

#

Unfortunately I can't that's the client repository and they are using that particular one 😢

#

Is there a way to know exactly what is missing?

#

yes it is

#

I'm gonna try it now 😃

hollow kernel Apr 20, 2018, 9:35 AM

#

I'm getting FAILEDs on "UnrealFileServer.vcxproj", "UnrealPak.vcxproj", "UnrealLightmass.vcxproj" on a custom engine which supposedly works.

Each claims Im denied access to XmlConfigCache.bin because it's already in use. What processes might access that bin?

Afaict, nothing related to this engine is running when Im getting these errors.

slow ibex Apr 20, 2018, 9:38 AM

#

you can use Resource Monitor for that

#

like this http://www.winhelponline.com/blog/resource-monitor-find-process-locked-file-windows-7/

Winhelponline

Ramesh Srinivasan

How to Use Resource Monitor to Find Which Process Has Locked a Fil...

Resource Monitor is used to see details of running processes, associated handles and modules. Investigate which process is currently using (locked) a file.

hollow kernel Apr 20, 2018, 9:41 AM

#

Thanks! I'll give it a try. My mistake, it's the XmlConfigCache.bin that couldn't get accessed.

#

According to Resmon, nothing's using that bin...

slow ibex Apr 20, 2018, 9:48 AM

#

@hollow kernel try to restart your machine and see

lofty ore Apr 20, 2018, 9:54 AM

#

Anyone familiar with levelstreaming and asyncloading stuff in UE4? I've got some questions about them. Thanks.

hollow kernel Apr 20, 2018, 10:11 AM

#

@slow ibex OK, thanks!

slow ibex Apr 20, 2018, 12:06 PM

#

@gusty laurel the vanilla version compile without problems...

slow ibex Apr 20, 2018, 12:31 PM

#

@gusty laurel I know the line in the ExternalExecutin.cs file that print the error during compilation, how can I debug it?

onyx scarab Apr 20, 2018, 5:19 PM

#

Hey guys, I've built my dedicated from Source and when running it, this is my output:

📎 unknown.png

#

It seems it doesn't load anything. Been struggling with this issue for a while and can't find a proper solution.

#

There are absolutely no errors--not even in the log file,--and I can't connect to my server through any IP.

#

Meanwhile, if I run the server using the editor, it works properly and I'm able to connect to it through local IP.

#

Does someone have an idea on what's going on?

swift ivy Apr 20, 2018, 7:42 PM

#

Is the Serialization submodule from Core used in network data compression/decompression? Or does UE4 networking just use simple packing and quantization?

shrewd thorn Apr 20, 2018, 8:58 PM

#

Network serialization is completely different from normal serialization

#

Sometimes they look at the same property flags, sometimes not

#

@onyx scarab by default it won't be listening for connections. If you look at your log after running in the editor it probably adds -listen to the command line. It's also possible that because you're in shipping it's expecting things to be more "locked down"

onyx scarab Apr 20, 2018, 9:02 PM

#

hey @shrewd thorn thank you for your response

#

unfortunately, -listen didn't work.

#

also, i've built the DebugServer and faced the same problem

#

i see what you're saying about being more locked down

shrewd thorn Apr 20, 2018, 9:03 PM

#

I forget the exact syntax for that, you may be better off in #multiplayer

onyx scarab Apr 20, 2018, 9:03 PM

#

but i've investigated every bit of log and had absolutely 0 useful stuff

rustic reef Apr 20, 2018, 10:11 PM

#

make sure you are compiling your current project

#

and not the solution

#

@sick basin

#

there is a hotkey you can assign for this, or right-click your project in the solution explorer and choose build only this

sick basin Apr 21, 2018, 8:36 AM

#

@rustic reef Yes I did make sure to press "Build only [..]"

sick basin Apr 21, 2018, 2:13 PM

#

I installed a plugin (within epic launcher) for UE4.18 binary version. Then I copied UE4.18\Engine\Plugins\Marketplace\[PluginName] to my custom engine build \Plugins\Marketplace\ directory

#

Then I edited "BuidId" UE4Editor.modules file

#

📎 unknown.png

#

shouldn't it just work? (It doesn't) My custom engine is only slightly changed (exposed a few functions etc)

#

I know I should rebuild the plugin from source. I'm just trying to understand why I can't do this.

#

Noob question. Thanks in advance 😃

gloomy hamlet Apr 21, 2018, 6:21 PM

#

@sick basin Not 100% sure, but have a feeling the compiler writes version info into the Dll.

#

Yep, you'd have to somehow trick this: https://github.com/EpicGames/UnrealEngine/blob/8e4560b8c22b309e73ff0ce90377742c3dfe13cc/Engine/Source/Runtime/Core/Private/Windows/WindowsPlatformProcess.cpp#L128-L168

#

Probably not worth the effort.

#

Although since it's a source build, I guess you could just disable the check here: https://github.com/EpicGames/UnrealEngine/blob/8e4560b8c22b309e73ff0ce90377742c3dfe13cc/Engine/Source/Runtime/Core/Private/Modules/ModuleManager.cpp#L1152-L1173

sick basin Apr 21, 2018, 6:30 PM

#

@gloomy hamlet Wow you killed it. Didn't expect such in depth answer! Thanks a lot.

gloomy hamlet Apr 21, 2018, 6:31 PM

#

No worries. I looked into this code just recently so knew where to look 😉

upper dragon Apr 21, 2018, 9:17 PM

#

Do I started digging through the engine Source and saw a Third Party for Python. What uses python?

swift ivy Apr 22, 2018, 1:28 AM

#

@upper dragon Pretty sure Python bindings exist for ease of writing editor extensions and scripts.

upper dragon Apr 22, 2018, 1:30 AM

#

Oh interesting. I should look into where they implement it. I'd love to restart Rust Bindings for UE 4

grim halo Apr 22, 2018, 7:13 AM

#

should I worry about compiling ( the whole engine ) to an SSD? does it write too much data?

elder falcon Apr 22, 2018, 10:54 AM

#

nah, it's fine, modern ssds are rated for what would be thousands of compiles and usually last much longer than they're rated for

#

been using this one for almost a year now, and it's barely reached 1/20 of its supposed lifespan https://i.imgur.com/Bd3jlgQ.png

Imgur

grim halo Apr 22, 2018, 8:41 PM

#

thanks for the tip

gray glade Apr 23, 2018, 12:47 AM

#

@Zeblote#3420 How do you check that? Struggling to find it in Samsung Magician.

#

Derp. Nevermind

#

Wait, how?

📎 unknown.png

#

I've had this for more than a year and I work on Fortnite. What are you doing in 1 year that's got more writes than something as big and rapidly changing as Fortnite? o_o

#

Easily hundreds of art and engineering changelists a day.

obtuse axle Apr 23, 2018, 12:49 AM

#

Do you use yours as an OS drive?

gray glade Apr 23, 2018, 12:49 AM

#

I have a separate one for the OS and applications.

#

This one is dedicated just to Fortnite. I figured we were comparing SSDs for a single project or UE4 projects in general. :X

obtuse axle Apr 23, 2018, 12:50 AM

#

Well, I can't speak for them, I was just assuming based on the usage

#

Mine is at 22.8 as an OS drive over the past two years ¯_(ツ)_/¯

gray glade Apr 23, 2018, 12:51 AM

#

21.7 TB on my OS drive since... not sure when.

#

Does Windows track volume creation date? Hmmm...

#

That definitely isn't right.

📎 unknown.png

#

Oh, bet you it was the update. Those seem to be done almost like OS upgrades.

#

Yep. Windows.old from 12/31/2017.

#

Er, that's modified. Created on 12/19/2017, like I thought.

#

Ahah. A lot of folders in Program Files created in 2015. Sounds right. So about 2 - 3 years.

hollow kernel Apr 23, 2018, 1:41 AM

#

Anyone know if there's already a skinned mesh vertex factory in the engine? There doesnt appear to be one in the Shaders folder.

gray glade Apr 23, 2018, 1:42 AM

#

I don't know what that means, but I get a lot of hits for "skin vertex factory"

#

See if any of them are what you're looking for?

hollow kernel Apr 23, 2018, 1:57 AM

#

Ah, sorry. There's LocalVertexFactoryCommon and LocalVertexFactory. I thought "skinnedvertexfactory" isnt common, and that it should have its own file.

should've checked the local files first. Sorry.

gray glade Apr 23, 2018, 1:58 AM

#

I just do a VAX symbol search, not a file search.

#

Multiple things can exist in a file, so a file-name search isn't best.

hollow kernel Apr 23, 2018, 2:00 AM

#

I just hadnt come across a "skin*"-related symbol to begin with...
Awesome, thanks, Sion. I'll remember those tips.

gray glade Apr 23, 2018, 2:03 AM

#

NP

stable hemlock Apr 23, 2018, 2:43 PM

#

anyone experienced this error before

#

[2018.04.23-14.23.44:036][464]LogD3D11RHI: Error: D:\Build\++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Viewport.cpp:(217): BackBuffer->GetResource() has 3 refs, expected 1 [2018.04.23-14.23.44:040][464]LogD3D11RHI: Error: SwapChain->ResizeBuffers(1,SizeX,SizeY,RenderTargetFormat,DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH) failed at D:\Build\++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Viewport.cpp:234 with error DXGI_ERROR_INVALID_CALL, Size=1197x785 Format=DXGI_FORMAT_R8G8B8A8_UNORM(0x0000001C) [2018.04.23-14.23.44:040][464]LogWindows: Windows GetLastError: The operation completed successfully. (0)

coral flame Apr 23, 2018, 3:17 PM

#

Excuse me guys, anybody knows how to get current selected folder on Content Browser?
I know SAssetViews.cpp has the method I need but i dont know how can i get a ptr to it as it is private in ContentBrowserModule

distant ferry Apr 23, 2018, 4:21 PM

#

Ive tried to compile nvidia flex 4.17 in visual studio and im getting multiple errors can someone please help me out

grizzled smelt Apr 23, 2018, 11:34 PM

#

I'm getting this kind of error from time to time in the editor, anyone got anything like this?
Fatal error: [File:D:\Build\++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Util.cpp] [Line: 327] SwapChain->ResizeBuffers(1,SizeX,SizeY,RenderTargetFormat,DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH) failed at D:\Build\++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Viewport.cpp:234 with error DXGI_ERROR_INVALID_CALL, Size=512x285 Format=DXGI_FORMAT_R8G8B8A8_UNORM(0x0000001C)

#

@stable hemlock lol, it seems we have similar issue

stable hemlock Apr 23, 2018, 11:39 PM

#

@grizzled smelt omg ❤ so its not my fault!!!!!

grizzled smelt Apr 23, 2018, 11:40 PM

#

Well we might screw up the same thing 😄

stable hemlock Apr 23, 2018, 11:40 PM

#

thats a rare chance lol

pearl fulcrum Apr 23, 2018, 11:42 PM

#

its a sign you guys, team up!

stable hemlock Apr 23, 2018, 11:44 PM

#

lol

swift ivy Apr 23, 2018, 11:44 PM

#

@stable hemlock @grizzled smelt StackOverflow suggests that this is caused by your machines not supporting a specific flag when setting up the swap chain. For example, the feature level might be too high for your hardware.

stable hemlock Apr 23, 2018, 11:45 PM

#

@swift ivy mines only happening in 4.19.1 i have a team member who runs it in 4.19.0 and he hasnt had a crash in a long time

grizzled smelt Apr 23, 2018, 11:45 PM

#

Yeah, I'm on 4.19.1 too

swift ivy Apr 23, 2018, 11:47 PM

#

@stable hemlock @grizzled smelt Here's an interesting commit from the 4.19.1 branch. I think this might be the issue: https://github.com/EpicGames/UnrealEngine/commit/a779783c06e1ddec39bbc3c870e56ad5b1fdeff0

stable hemlock Apr 23, 2018, 11:47 PM

#

@swift ivy i dont have the source installed mines the base engine cause of source control

swift ivy Apr 23, 2018, 11:48 PM

#

Well until a patch comes out for this, you'd have to selectively revert that specific commit on a custom engine build to be able to use 4.19.1

stable hemlock Apr 23, 2018, 11:48 PM

#

@swift ivy ahh true

swift ivy Apr 23, 2018, 11:49 PM

#

Could one of you post this as a bug report so it gets fixed quickly?

grizzled smelt Apr 23, 2018, 11:49 PM

#

@swift ivy can I link the engine source to the git repo if I downloaded the engine usually from the Launcher?

#

Yeah, will do

swift ivy Apr 23, 2018, 11:50 PM

#

The engine downloaded from the launcher is pure binaries. You'd have to git clone the repo and work from that

grizzled smelt Apr 23, 2018, 11:50 PM

#

Ah, right

swift ivy Apr 23, 2018, 11:50 PM

#

Make sure to include the commit as the prime suspect please, otherwise the engineers will probably be clueless

#

Are both of you running binaries?

grizzled smelt Apr 23, 2018, 11:51 PM

#

@swift ivy thanks for getting that commit

swift ivy Apr 23, 2018, 11:51 PM

#

I'd like to see if bIsQuadBufferStereoEnabled is true

elder falcon Apr 24, 2018, 12:00 PM

#

@gray glade it's my everything drive, so most of the usage is probably not unreal building but windows doing whatever

gray glade Apr 24, 2018, 12:02 PM

#

Gotcha. Figures.

elder falcon Apr 24, 2018, 12:03 PM

#

it#s starting to get dangerously full... but not having to worry about what goes on which drive is so nice :v

celest plover Apr 24, 2018, 2:01 PM

#

hi all.. pretty new to rebuilding engine from source.

#

so i added a plugin to the engine., is it supposed to be recompiling everything?

#

i assume it's like the project compilation where it only recompiles whatever module that is dirtied unless doing a fullr ebuild

elder falcon Apr 24, 2018, 3:00 PM

#

it shouldn't be doing a full rebuild, no

coral flame Apr 24, 2018, 8:56 PM

#

Sorry, is there a way to cast to UBlueprintGeneratedClass ? I'm trying to make a tool where I find myself trying to replace values on UPropertys on specific blueprints

#

I can get the asset as a UObject, cast it to UBlueprintCore and get its GeneratedClass which lets me use reflection over UProperties, but still no luck to get a proper value using ContainerPtrToValuePtr

#

I think that if i can get the UBlueprintGeneratedClass i can use that pointer and it will work, but dont know how to get it

elder falcon Apr 25, 2018, 3:43 AM

#

https://github.com/EpicGames/UnrealEngine/commit/0c78b2e389e4fe73b19360c0494dd3df9bdebbdf could this be the fix for the strange stats freezes in 4.19?

wispy shuttle Apr 25, 2018, 4:01 AM

#

Can I delete the 'intermediate' folder? Will it be generated again?

swift ivy Apr 25, 2018, 4:07 AM

#

@wispy shuttle Yes, intermediates are object files are other bits of compiled binaries, only used by the compiler. If you delete these and rebuild the engine, you will have to rebuild everything though

celest plover Apr 25, 2018, 4:06 PM

#

@elder falcon it seems that when i click build it's rebuildling everything any idea what i'm doing wrong?

#

firstly it should even say no changes and not build .. like normal project file ys?

elder falcon Apr 25, 2018, 4:08 PM

#

a build with no changes looks like this for me https://i.imgur.com/JQZqnRe.png

Imgur

celest plover Apr 25, 2018, 4:08 PM

#

right i would assume so. in a normal binray project that's what I got

#

now that I hook up my project to the sourc build... even project building is compiling entire engine

elder falcon Apr 25, 2018, 4:09 PM

#

more than once? like it does that even if you click build again after it finishes?

celest plover Apr 25, 2018, 4:09 PM

#

after hooking the project <-- haven't tried

#

when compioling engine yes...

#

i click right after it started doing it again

elder falcon Apr 25, 2018, 4:11 PM

#

make sure your startup project is set to the game and not ue4, and you are in development editor config

#

then it "just works" for me :v

celest plover Apr 25, 2018, 4:12 PM

#

all set

#

still compling now

#

we'll see

#

thanks @elder falcon

#

ahhh crap exact same thing happen. but i think not entire engine is rebuilding ... took much longer than usual but not nearl as long as full engine build

hollow kernel Apr 26, 2018, 3:54 AM

#

Anyone having probs with the dependency server? Looks like I can't connect to it. Saying it can't access ".ue4dependencies.tmp" fsr ...😫

#

Running Setup.bat
Edit: Ugh, that's weird...had to run Setup.bat as admin - even though I've always run it w/o admin rights previously.

mental tide Apr 26, 2018, 6:03 AM

#

Hi everyone! Not sure if it's right place to ask but here we go.
Did anyone checked MayaLiveLinkPlugin from engine extra's? In my understanding, the cpp file have chunk of the code commented out (with "if 0") and that part is responsible for streaming Maya's subject attributes as animCurves via LiveLink.
In the mean time documentation is already updated and describes how to use this feature.
So the question is: Did I miss something and it's possible to stream custom attributes with current version of MayaLiveLinkPlugin, or is that feature not finished in current release?
here is the link to my forum post with more details, would appreciate if someone could take a look, and tell me if it's possible to achieve.
https://forums.unrealengine.com/development-discussion/animation/1452077-passing-parameters-via-mayalivelink
thank you!

Unreal Engine Forums

I'm basically mirroring my question from AnswerHub:
https://answers.unrealengine.com/que...-livelink.html (https://answers.unrealengine.com/questions/773350/getting

hollow kernel Apr 26, 2018, 6:56 AM

#

@mental tide Does it still not work if you comment it in and rebuild the plugin?

Since it's a plugin anyway, maybe people in #plugin-dev would have more info?

halcyon marlin Apr 26, 2018, 11:48 PM

#

i cant access the source i followed the instructions (adding my github username on my epic Games profile) but the link to the repo is a 404

#

my github is https://github.com/nasso

GitHub

nasso (nasso)

nasso has 15 repositories available. Follow their code on GitHub.

#

but it doesn't work i have no idea why

#

does it take some time?

#

oh nvm

#

checked my mails

#

didn't know we received a mail

#

my bad

somber goblet Apr 27, 2018, 1:00 PM

#

hmm

low dust Apr 27, 2018, 3:51 PM

#

stupid question

#

but can you somehow force unitybuild to start with some specific class?

#

I'm trying to upgrade SMAA to 4.19 but this thing will take forever again since it always compiles like 500 cpp files before this one

#

I truly hate UE4 engine compilation :/

#

or wish I had that farm of high end computers doing the processing for me

low dust Apr 29, 2018, 2:13 PM

#

so

#

I have this super weird issue

#

I'm suspecting it's unreals unitybuild messing things up again

#

I have this old set of profiler macros here from nvidias volumetric lighting (originally used in 4.17). I've upgraded this into 4.19 and had to disable the scoping calls to get it to build, so I need to redo these macros

#

but the issue is that these things are not used anywhere in the code anymore but if I remove them (not replace with anything) build fails like this:

#

📎 unknown.png

#

and this builds just fine:

#

📎 unknown.png

#

I feel the first one that doesn't build is actually throwing valid errors, like if I did nonunity-build, I would probably need to fix the errors

#

it still puzzles it works in that latter image when all that is different is that I have bunch of counters

#

those counters have cpp side counterpart which I have also removed on the top case, but it really shouldn't do anything like this

#

those removed things are not being used by the rest of the code atm at all

gloomy hamlet Apr 29, 2018, 5:02 PM

#

@low dust I think you're right, it's related to unity builds and/or precompiled headers.

#

The header you showed doesn't have any includes, which should really be fixed. Without explicit includes, it's relying on stuff being included before it, which is unpredictable and with unity/adaptive PCHs, can change due to seemingly unrelated code adjustments.

#

I wrote an article on this stuff recently that might be of use: http://kantandev.com/articles/ue4-includes-precompiled-headers-and-iwyu-include-what-you-use

kantan

UE4 #includes, Precompiled Headers and IWYU (Include What You Use)

Ever had Unreal's build tool suddenly spring some incomprehensible error on you, pointing to a line of code that you didn't touch? If so, read on.
A couple of engine versions back, Epic introduced the 'Include What You Use' model to UE4 in an...

low dust Apr 29, 2018, 5:05 PM

#

yeah, I have no other logical explanation for this

#

nvidia doesn't care for including anything extra, so they tend to include only what's needed to make unitybuilds work

#

there are few guys at Epic who occasionally fix unity builds from official repo

#

so that's why most of core UE4 code works in nonunity build

#

last time I tried nonunity only some new stuff in UE4 side broke

#

so, to properly fix this, I'd need to make nonunity build to really catch all issues

#

you probably explained this in the post too?

#

@gloomy hamlet

#

I'm pretty aware of the procedure, having upgraded bunch of UE4 branches into 4.15, and bunch into 4.18 and 4.19

#

a lot of things tend to require more attention

#

but

#

I really don't care enough to spend 2 days of properly fixing this with current ue4 compile times

gloomy hamlet Apr 29, 2018, 6:46 PM

#

@low dust Yeah to fix it properly you would need to add includes so that it builds in non-unity, PCHs disabled.

#

But I agree it's a pain, and they should have done that themselves.

#

If it's not consistent, it's not actually guaranteed to build properly in unity either, because the composition and ordering of a unity build isn't strictly defined.

low dust Apr 29, 2018, 6:52 PM

#

yeah, I can tell that now 😄

#

as simply removing bunch of idle macros makes it fail in all kinds of odd ways

gloomy hamlet Apr 29, 2018, 7:01 PM

#

Yep. Unity builds and PCHs are kind of evil. Though you could instead say C++ is evil for needing to explicitly #include all dependencies.

low dust Apr 29, 2018, 7:21 PM

#

@gloomy hamlet bit related to this, you have any clue how to do "EXTERN" for DECLARE_GPU_STAT?

#

I'm probably missing something obvious

#

they changed the GPU stat macros on 4.19 slightly

#

and the hack nvidia did for the same id SCOPED_GPU_STAT to work across multiple classes broke there

#

been trying to solve it but I can't see any example of having SCOPED_GPU_STAT with same name in engine code that would be split into multiple files

#

to be fair, even this thing could be unity build issue

#

altho I'm including the right files

#

UBT still spits out errors for not finding the stats

#

as a even more hacky workaround, I've just put separate macros for each file, but it's messy

#

usually in cases like these, I just seek how epic has solved the same thing elsewhere in the engine code but it's way harder now when there's no such example + pretty sure all these macros are undocumented

gloomy hamlet Apr 29, 2018, 7:41 PM

#

@low dust Not sure, have barely used the stat macros. I would have thought you should just be able to put the DECLARE_ macro in a header, #include that header in multiple cpp files, then use the corresponding macros in those for the shared stat.

low dust Apr 29, 2018, 7:53 PM

#

these are never done in headers elsewhere

#

and when I do, it throws undeclared identifier error for my macro ID string

#

which is literally the first place where you introduce the id 😄

#

if I place DECLARE_GPU_STAT or DECLARE_GPU_STAT_NAMED in cpp

#

it works just fine

#

things show up in stat gpu while playing

#

I'm pretty sure I did a project wide thing myself on my old ue4 project but it wasn't using these GPU stat macros

#

hmmm

#

I looked at my old profiling macro I used and I just declared it again each time for each class it appears

#

profiler was happy about it

#

it wasn't perfect setup but that way I could macro it on my main project header so that I could just throw profile macro in oneliner where ever I wanted around the project and could get profiler results for it

#

(instead of manually declaring the stat beforehand each time and then running the scope macro with all the bits it needs)

low dust Apr 29, 2018, 9:26 PM

#

well, I just put the extra declarations inside functions now, it's ugly but it works

#

also, did give it another go to start adding missing parts but got stuck on some weird global object they have there

#

extern pointer and include was in the cpp but it still failed to include the thing

low dust Apr 30, 2018, 7:55 AM

#

@gloomy hamlet fyi, I put a link to your article on my message here https://forums.unrealengine.com/community/general-discussion/24447-nvidia-gameworks-integration?p=1468783#post1468783

Unreal Engine Forums

General discussion about the game industry and the Unreal Engine community.

thick storm Apr 30, 2018, 7:06 PM

#

re unity builds

#

you must consider that they can randomly break

#

if the files won't be merged the same way every time

gray glade Apr 30, 2018, 10:20 PM

#

Internally, we have automated builds not use unity building so that we can detect errors arising from it.

#

Since, technically, concatenating source files together totally can change the semantics of some code.

low dust May 1, 2018, 12:11 AM

#

yeah, I've heard that

#

but still some new feats miss those on some ue4 releases

#

so I'm guessing even Epic doesn't do those on each QA pass for new engine release

#

unless, that has changed on 4.19

#

pretty sure I had to fix something on 4.18 for non-unity

gray glade May 1, 2018, 12:21 AM

#

Well, even without unity builds, there was the fact that the engine was not following IWYU policies.

#

While that's at least consistent/deterministic, it also made it such that some headers required other headers to be included first in non-obvious ways that would make working with them problematic.

elder falcon May 1, 2018, 5:35 PM

#

https://github.com/EpicGames/UnrealEngine/commits/dev-core what is this?

low dust May 1, 2018, 6:29 PM

#

well, if anything good comes out of this, the VXGI dev forwarded my request to other UE4 intergration guys about checking the IWYU

#

so maybe they'll pay more attention to that in the future

stable hemlock May 1, 2018, 10:48 PM

#

anybody know whats going on here?

📎 unknown.png

elder falcon May 1, 2018, 10:49 PM

#

it failed to compile the default material

stable hemlock May 1, 2018, 10:51 PM

#

@elder falcon on a scale of 1 - 10 how difficult is this normally to fix?

elder falcon May 1, 2018, 10:52 PM

#

that depends on what you did to make it happen

hollow kernel May 2, 2018, 6:29 AM

#

Sorry to interject>
Is Diffuse_Lambert the cheapest shading model?

Looking at the math of all the shader models in BRDF it appears so (just one line), but I was wondering if anyone knows of an even cheaper one not included in there.

elder falcon May 2, 2018, 12:35 PM

#

it's the cheapest one included yes

#

except for unlit

versed crescent May 2, 2018, 1:19 PM

#

HI GUYS! SO MY Destructible mesh loses collision and physics after packaging

HERE IS THE BUG TICKET : https://issues.unrealengine.com/issue/UE-54133
help me plsss 😦

hollow kernel May 2, 2018, 3:22 PM

#

@elder falcon Got it. Thank you!

grand sand May 3, 2018, 2:42 AM

#

guys is it possible to load 3d model in runtime ?

gray glade May 3, 2018, 2:55 AM

#

If you mean import a model just like you would in the editor, not quite. That's almost certainly editor-only code.

#

And editor-only code can't be distributed, legally.

#

There are other options though, but I don't know much about them.

gloomy hamlet May 3, 2018, 8:06 AM

#

You can use assimp, or look at this plugin: https://forums.unrealengine.com/development-discussion/engine-source-github/122169-plugin-runtime-mesh-loader

Unreal Engine Forums

Discuss GitHub, using source code to modify the engine, and the creation of engine plugins.

#

@grand sand But I think either way you'd have to use a procedural mesh for rendering. Suspect the methods for building static meshes from raw data are also editor only.

grand sand May 3, 2018, 8:10 AM

#

@gloomy hamlet I came to that post only

#

about assimp integration in ue4

grand sand May 3, 2018, 9:10 AM

#

@gloomy hamlet the methods for building static meshes are editor only means I can't use them in runtime ?

#

@gloomy hamlet mean I can't package my project with such functionality as it would be broken ?

gloomy hamlet May 3, 2018, 9:28 AM

#

I think so, not certain. But that's specifically UE4's static mesh representation. You can render the data using procedural/runtime mesh components.

sharp axle May 3, 2018, 7:34 PM

#

anyone running into trouble after installing the windows 10 sdks (for DX12 development) compiling the engine? I got it to work on 4.19 before the hot fixes by removing old win 10 sdks from windows kit folders (and using the latest one) as well as updating bUseWindowsSDK10 to true in UEBuildWindows.cs. However, I'm getting some new errors after going to 4.19.2 with this approach.

final quarry May 3, 2018, 9:15 PM

#

Are resource files no longer generated for projects? I see alot of older references to Source/ProjectName/Resources/Windows/ProjectName.rc but cannot get this file to generate, need it to fix an icon related issue with packaged builds

final quarry May 3, 2018, 10:01 PM

#

@stable hemlock Close down any running instances of the engine/editor, and try again

final quarry May 3, 2018, 10:23 PM

#

It sounds like possibly another process on your machine is locking up the files

low dust May 4, 2018, 12:19 AM

#

I'd just delete the file manually

swift ivy May 4, 2018, 12:38 AM

#

Windows won't let you delete a file if there's an open file handle on it

#

You need to restart

pearl fulcrum May 4, 2018, 2:12 AM

#

actually there's a good chance its explorer itself

#

so yeah restart or kill explorer (gl doing that in vanilla win10 I've heard)

umbral topaz May 4, 2018, 9:53 AM

#

There are also utilities to override that

#

Something-something unlocker

civic hound May 4, 2018, 4:16 PM

#

How hard would it be to implement HFTS into UE4?

gray glade May 4, 2018, 7:54 PM

#

@umbral topaz Process Explorer, I believe.

#

Which does a lot, lot more than just let you release handles.

topaz phoenix May 5, 2018, 2:14 AM

#

So i've been thinking that telling new comments in the Material Editor to just use the default Blueprint properties couldn't be that difficult

#

Anyone looked into it?

#

https://github.com/EpicGames/UnrealEngine/search?utf8=✓&q=comment+color&type=

whole mulch May 5, 2018, 8:06 AM

#

@topaz phoenix - could you be more specific?

topaz phoenix May 5, 2018, 5:45 PM

#

Being able to set a default color for comments

full sleet May 5, 2018, 7:04 PM

#

@grand sand regarding mesh loading at run time, you'll have to setup a whole modding pipeline

#

so you'll cook the mesh as a dlc which you load dynamically

#

not as easy as it sounds, but is a workable approach

#

workable as in spend months on it facepalming

sick pivot May 6, 2018, 8:02 PM

#

Getting this error from download/compile of 4.19.2 from Epics gitbuh account.... anyone else experiencing this?

Assertion failed: RawMeshBulkData != NULL [File:D:\Unreal4SourceCode\UnrealEngine-4.19\Engine\Source\Runtime\Engine\Private\StaticMesh.cpp] [Line: 2123]

#

http://puu.sh/AhjFr/c11a587cc2.png

stable hemlock May 6, 2018, 10:07 PM

#

@sick pivot i built 4.19.2-release zip file from source using vs 2017 worked okay. those are the steps i used.

📎 unknown.png

sick pivot May 6, 2018, 11:53 PM

#

yes - this is standard procedure for building from source - i'm just saying .... i am getting staticmesh.cpp breakpoint - editor wont open

elder falcon May 7, 2018, 12:16 AM

#

might have a corrupted mesh in your project for whatever reason?

stable hemlock May 7, 2018, 12:20 AM

#

hmm, i build the src separately from my game project first, then always compile my game project afterwards (dev editor only) works on my end as of 4.19.2. So in my case I use two separate .sln solutions although they are both tied together in the solution explorer for the game project sln file.

hollow kernel May 7, 2018, 1:03 AM

#

Anyone know what method video sequencer uses for playing animation sequences on skeletal meshes?

maiden wave May 7, 2018, 6:29 AM

#

Hi, anyone here encountered a problem with not being able to generate the .sln file from source after running GenerateProjectFiles.bat? There were no errors in the log even when running .bat file inside the command prompt, nor did any come up when I added "echo on" on every command I needed a log to. All my UE requirements in VS are installed (including Windows 8.1 SDK).

I even uninstalled and reinstalled VS2017 with the needed components. Anyone who has encountered this? Help would be appreciated, thanks. 😄

sand flare May 7, 2018, 11:52 AM

#

Hey guys I am getting Corrupt data found please verify your installation when launching unreal engine from source. Is there any fix?

elder falcon May 8, 2018, 8:25 AM

#

anyone tested vs 15.7 yet?

hollow kernel May 8, 2018, 9:14 AM

#

@maiden wave I've seen that before. I think I had to move the UE4 source folder I wanted to build for into the default (C:\Program Files\Epic Games) one to fix it. Not sure, though.
Also, just to be sure, rerun Setup and GenerateProjectFiles.bat as admin?

hollow kernel May 8, 2018, 9:57 AM

#

Anyone know what's up with"EnumClassFlags.h"? It's playing musical includes - wasn't in 4.17, there in 4.18-staging, gone in 4.18 release and now back in 4.19.
I take it they're eventually going to keep it. Was just wondering if it's part of the enum overhaul they're doing (like what they did with VR devices id strings being changed to enums)...

elder falcon May 8, 2018, 10:05 AM

#

? that's been around for the longest time

#

it's a bunch of operators so you can implement bitflags with strongly typed enums

coral flame May 8, 2018, 3:36 PM

#

hello guys, is anybody able to give me direction about deserializing and serializing an uasset??

sharp axle May 8, 2018, 4:32 PM

#

the way I had done it for a very quick effort was to implement the export asset function (to json). You can do this using a UFactory implementation and implementing the ExportBinary function among other ways. A huge amount of factories exist in EditorFactories.cpp for you to look at.

#

anyway, from there I take my asset (input UObject* to ExportBinary) and convert to json. You also usually need to mess with the format extensions and what not, again the EditorFactories.cpp can help a bit.

#

import you effectively do another (the same even?) factory that does import process. I've implemented UFactory::FactoryCreateBinary in my derived class to do this to bring that json back into the asset format

#

in my case I have my outer class being a UDataAsset (with internal UObject types)

bool UFakeItem::SerializeFromJson(const TArray<uint8>& InContents, bool bIsTransient)
{
    FMemoryReader Ar(InContents);
    TSharedRef< TJsonReader<>> Reader = TJsonReaderFactory<>::Create(&Ar);
    TSharedPtr<FJsonObject> JsonObject;

    if (FJsonSerializer::Deserialize(Reader, JsonObject))
    {
        const TArray< TSharedPtr<FJsonValue> >& Items = JsonObject->GetArrayField(TEXT("ArrayOfUObjectInternals"));
        auto WeakItems = UFakeItem::ConvertFromJsonArray(Items, (bIsTransient ? nullptr : this));
        for (auto Weak : WeakItems)
        {
            InternalUObjects.Emplace(Weak.Get());
        }
        return InternalUObjects.Num() > 0;
    }
    return false;
}

#

header:

UCLASS()
class UFakeItem : public UDataAsset
{
    GENERATED_BODY()
public:
    UPROPERTY(EditAnywhere, Instanced)
    TArray<UFakeItemInstances*> InternalUObjects;

    bool SerializeToJson(TArray<uint8>& InOutBlob, FArchive* InArchive = nullptr);
    bool SerializeFromJson(const TArray<uint8>& InContents, bool bIsTransient = true);
};

#

note the UFakeItem::ConvertFromJsonArray checks transient or not. Thats because on import if they're transient they'll not be saved out once you save this asset

#

finally, i've got that function here:

TArray<TWeakObjectPtr<UFakeItem>> UFakeItem::ConvertFromJsonArray(const TArray<TSharedPtr<FJsonValue>>& InArray, UObject* OuterOwner)
{
    TArray<TWeakObjectPtr<UFakeItem>> OutputArray;
    OutputArray.Reserve(InArray.Num());

    for (int32 i = 0; i < InArray.Num(); ++i)
    {

        UFakeItem* NewFakeItem = NewObject<UFakeItem>(OuterOwner ? OuterOwner : (UObject*)GetTransientPackage());
        OutputArray.Emplace(NewFakeItem);
        // build them up at once (maybe they get a bit more contiguous?)
    }
    bool bSuccess = true;
    for (int32 i = 0; i < InArray.Num(); ++i)
    {
        const TSharedPtr<FJsonValue>& Value = InArray[i];
        UFakeItem* Item = OutputArray[i].Get();
        bSuccess = bSuccess && FJsonObjectConverter::JsonObjectToUStruct(Value->AsObject().ToSharedRef(), UFakeItem::StaticClass(), (void*)Item, 0, 0);
    }
    return OutputArray;
}

coral flame May 8, 2018, 5:15 PM

#

great ill take a look at that @sharp axle thanks for the info, im trying to replace references on every UObject reference in a set of uassets in a folder

atomic radish May 8, 2018, 5:26 PM

#

Gents, anyone familiar how a case, when camera is inside deferred decal actor projection box, is handled in UE4? Would be grateful for a pointer to the code.

hollow kernel May 9, 2018, 1:26 AM

#

@elder falcon My bad. I left out some important info. EnumClassFlags.h is now included in Engine/Source/Runtime/Rendercore/Public/RendererInterface.h for 4.19 release.

Edit:There are at least 10 other files affected with that change (each using its EShowMaterialDrawEventTypes class). Was hoping someone could tell me what commit this change got in on. Can't seem to find it.

elder falcon May 9, 2018, 6:16 AM

#

why does it matter?

hollow kernel May 9, 2018, 6:33 AM

#

@elder falcon Hey, thanks for the reply before. I'm trying to consolidate 2 custom shader models made on different engine versions (one based on 4.18_staging, the other based on 4.18). That new EShowMaterialDrawEventTypes class is one of the main differences between them.

jaunty marsh May 9, 2018, 9:02 AM

#

not sure if it's a right place to ask but how to force Visual Studio to build ALL engine components. I've built VXGI branch and decided to compare lightmass with it. But it wasn't available so I had to build it separately.

lapis yacht May 9, 2018, 11:35 AM

#

Oooh - there's an engine-source channel! So I'm having this issue where, even though using ./Setup.sh -exclude=Android -exclude=android (seems to be default too), it still tries to load android components, which ends up resulting in a crash. I can see the following in my logs, leading me to believe this is the case:

0x47c8151a UE4Editor-Android_ASTCTargetPlatform.dylib!IAndroidDeviceDetectionModule& FModuleManager::GetModuleChecked<IAndroidDeviceDetectionModule>(FName)   [UnknownFile])

#

Are there any simple solution to just exclude this code (using a 4.18 branch), or should I try and include the android "parts" and hope that will eventually result in the stuff compiling/etc. and not causing any issues due to them not loading?

#

(As stated before, I'm using a GitHub version of Unreal Engine 4.18, latest on that branch, and I'm using MacOS El Capitan.....WHICH I KNOW IS NOT SUPPORTED, but I'm trying to add support back for as my Mac can't upgrade. Successfully implemented OpenGL support back in 4.16, and managed to get to the project open screen.....but then that exception occurs, which almost looks like it's unrelated....but I could be wrong)

limber jacinth May 9, 2018, 7:31 PM

#

i compiled the engine but when my editor crashes it doesn't show the crash report window

gray glade May 9, 2018, 9:18 PM

#

It typically doesn't unless you're running... shipping? I think?

#

In any case, you should not expect all editor crashes to always show a crash report.

rich imp May 9, 2018, 9:19 PM

#

bjr

hollow kernel May 10, 2018, 1:51 AM

#

I just finished building this https://github.com/EpicGames/UnrealEngine/tree/4.19 after implementing the changelist from this https://github.com/marynate/UnrealEngine/tree/4.19-release-toon fork in it.

Fsr, input is only updated once every second (be it in PIE, Project Browser or Project Launcher). Anyone know what might cause a fixed 1 second lag? Everything works fine other than this 1 second lag, but it's unusable because of it.

hollow kernel May 10, 2018, 2:35 AM

#

Are there instructions somewhere on what the build naming conventions are for github? For example, what's the difference between 4.19 and Release right now?

swift ivy May 10, 2018, 3:28 AM

#

https://gyazo.com/ebacb040214bb444f270ddebbf09b8f0

Gyazo

hollow kernel May 10, 2018, 3:41 AM

#

Thanks Xenonic. I checked that out here too (https://docs.unrealengine.com/en-us/GettingStarted/DownloadingUnrealEngine), but it doesn't describe the difference between 4.19 and Release, or staging.

Long story short, where would the 4.19.2 changes be? I'd assume Release has it but 4.19 has more recent changes.

swift ivy May 10, 2018, 3:49 AM

#

Release holds the most recent release, in this case 4.19.2

hollow kernel May 10, 2018, 3:53 AM

#

Ah, cool. Thank you.

#

So I take it 4.19 holds the first 4.19 release minus any hotfixes, and then gets updated with all hotfixes once 4.20 release hits.

swift ivy May 10, 2018, 3:56 AM

#

A new branch will hold 4.20 when it's pushed out

hollow kernel May 10, 2018, 3:58 AM

#

Release would hold 4.20 too at the same time the new 4.20 branch is created, wouldn't it?

swift ivy May 10, 2018, 4:04 AM

#

Yea, as epic approaches the releasing stage, they lockdown the master branch, finish up QA, then merge into Release. They then create a branch off Release to hold the latest release

hollow kernel May 10, 2018, 4:05 AM

#

Got it. Thanks. Sorry for the barrage of questions.

hollow kernel May 10, 2018, 9:16 AM

#

That 1-2 fps everywhere issue is happening with 4.19-release, too. Maybe it has something to do with that new Material Layering/Upsampling/Dynamic Resolution stuff they added?

Happens in the launcher even, though. UE4.log shows no errors/fails.

How might one debug an issue like this?

low dust May 10, 2018, 3:30 PM

#

@hollow kernel 4.19 contains latest 4.19 branch

#

Like at the moment, it can be some commits ahead of 4.19.2

#

But if you want specific release, check releases section on github (not release branch)

#

Each release gets separate tag on git

#

Like 4.19.2-release

grizzled breach May 10, 2018, 5:54 PM

#

Does it mean anything if you get your pull request merged into the source?
"Waiting to merge" Should mean it is going to get merged right?

elder falcon May 10, 2018, 6:16 PM

#

it means it was accepted for some reason so you are very lucky

#

normally it just gets ignored

grizzled breach May 10, 2018, 6:35 PM

#

@elder falcon lol ok

elder falcon May 10, 2018, 6:36 PM

#

I wish it was a joke but there are actually hundreds of ignored pull requests

swift ivy May 10, 2018, 7:11 PM

#

Yea, I have 6 active from months ago and only 1 merged 😛

gray glade May 10, 2018, 7:15 PM

#

@elder falcon There are millions of licensees, but the number of people who have time to handle pull requests? Maaaybe that's a 2 digit number?

elder falcon May 10, 2018, 7:16 PM

#

:(

gray glade May 10, 2018, 7:17 PM

#

It's also my impression that a fair number of pull requests might be trying to add a solid new feature or fix a bug, but the code quality just isn't up to snuff.

elder falcon May 10, 2018, 7:18 PM

#

in that case why not write that as a comment and reject it?

#

now there are 100s of pulls that noone knows if they work at all or what might be wrong with them

gray glade May 10, 2018, 7:19 PM

#

I can't speak for anyone else.

#

But going through 100s of pull requests knowing that most of them will be frivolous or poorly done sounds like an experience.

#

A really, really unfun and unproductive and tedious and frustrating one.

#

And it's not like you can just assign some extra engineers to do this.

#

These are externally sourced changes to systems that have existing authors with responsibility over them.

elder falcon May 10, 2018, 7:22 PM

#

maybe make a cut and just close all of them? then people who are sure theirs are still relevant can re-open it

gray glade May 10, 2018, 7:22 PM

#

You make an AI change? The AI guy needs to review it. The AI guy has a full time job on his plate already. Stuff like that.

#

Perhaps, yeah. I don't know, that might be better than having lots of open pull requests. I won't disagree with that possibility.

#

If a JIRA hasn't been assigned a priority or department or anything like that for too long, it gets marked for deletion and a warning e-mail is sent out to anyone involved (IE the person who created it). I could imagine something similar.

low dust May 10, 2018, 8:56 PM

#

https://www.unrealengine.com/en-US/blog/development-branches-now-available-on-github

Unreal Engine

Development Branches Now Available on GitHub

Internal development branches are now being mirrored to GitHub! Find out how this benefits your projects.

grizzled breach May 10, 2018, 8:56 PM

#

@elder falcon Yeah didn't think mine would get seen so quickly but my changes were very minor.

elder falcon May 10, 2018, 8:57 PM

#

bunch of the branches are still missing

grizzled breach May 10, 2018, 8:57 PM

#

I've just been noticing incorrect errors and descriptions and figured I'd take the time to submit fixes for them.

low dust May 10, 2018, 9:04 PM

#

yeah, rendering and anim-phys are missing at least

#

but they said more will come in next weeks

hollow kernel May 11, 2018, 1:13 AM

#

@low dust Thank you very much for the clarification. It's all crystal clear now.

#

I never noticed that releases tab...

wraith crystal May 11, 2018, 1:27 PM

#

I'd like to replicate divinity's camera culling / material fade out effect in ue4

#

https://cdn.discordapp.com/attachments/221799195806400512/444483715599695882/divinity_camera_culling.png

#

and I'm guessing I could do it similarly to how precomputed visibility is calculated, only at run-time

#

but I don't really know where to start and any pointers would be helpful

#

I've found a tutorial that uses a per-object translucent material set up, but that's not really feasible given that I'd have to modify every single material used in the game

low dust May 11, 2018, 4:11 PM

#

@wraith crystal that's why you use master materials with ue4

#

I mean, you should do that anyway

#

not for just this case

#

that way you can change the core material and have all material instances inherit the changes automatically

#

you'd just do it once

#

also, why this channel and not #graphics ?

wraith crystal May 11, 2018, 4:39 PM

#

@low dust What I'm trying to avoid is to have to plug functionality into all of my materials, hence the question here. I'm looking for something that could work engine-wide, e.g. a flag that is set to true by default on pretty much any material. I've gotten some great advice on #graphics, but in my understanding that is also per-material. Here, the question is where to look in engine code if I wanted to develop such an effect.

low dust May 11, 2018, 4:42 PM

#

well, that's exactly what master materials are for

edgy hedge May 12, 2018, 1:28 AM

#

Would I have to extend the engine in order to make a RTS game similar to Company of Heroes 2?

#

Destructible landscape, only about max ~50 player controlled characters on the map

#

5v5 multiplayer

elder falcon May 12, 2018, 2:58 AM

#

anyone know if it's possible to create a Program like BlankProgram or UnrealHeaderTool in the project folder?

#

ubt is just completely messing up when I try this

#

placing it in Project/Source/Programs doesn't work - then it doesn't find the target.cs file

#

moving the target.cs file up to project/source/ lets me generate the project files, but fails to build because project/programname.uproject does not exist

#

it's all very strange

obsidian quail May 12, 2018, 3:32 AM

#

anyone have suggestions of where to run FEditorBuildUtils::RegisterCustomBuildType from?

#

I want to add an extra build step when I run the Build command in editor

#

just unsure where I should call this from

#

should I be going ahead and making a custom UGameEngine and UUnrealEdEngine?

swift ivy May 12, 2018, 5:12 AM

#

Does UE4 use Windows RPC with MIDL generation? I opened up an unreal app with process hacker and noticed that it loads the module rpcrt4.dll, which is Windows RPC Runtime.

obsidian quail May 12, 2018, 4:08 PM

#

The answer to my own question was yes, a custom unrealedengine worked

terse lake May 13, 2018, 12:56 PM

#

Heya, I've updated my source-built engine from 4.18 to 4.19. Now after compiling my project under the new source, it says that the game module can't be found. I've compiled both development editor and development client. What could I be missing? Did a bit of googling myself but none of the tips helped.

spice shadow May 13, 2018, 5:48 PM

#

Hey all, so I'm currently trying to build from Source the "Release Branch" of the Unreal Engine from Github for my team and I. But currently, I am having issues with the SwarmInterface.cpp file
Has anyone else had any issues when trying to build the UnrealLightmass?

📎 edb3cdd2e32d85adfb39a2c342eeddcd.png

stable hemlock May 15, 2018, 10:14 AM

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dont know where to put this but i think this is the closest channel to it,
does anyone know how to get rid of these errors i have a whole output log full of them
LogTexture: Error: Failed to build texture /Game/Assets/Textures/misc/signs_normal.signs_normal.
LogTexture: Warning: GetMipData failed for /Game/Assets/Textures/misc/signs_mask.signs_mask (DXT1)

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google is 0 help

hexed cipher May 15, 2018, 3:09 PM

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Is Source Code only usable in VA 2015 or can I keep using 2017?

elder falcon May 15, 2018, 3:10 PM

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you should be using the latest vs 2017

hexed cipher May 15, 2018, 3:17 PM

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Sweet, thanks.

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This is my first time messing with any source code stuff, so I'm feeling a tad overwhelmed 😅

glad knot May 15, 2018, 4:17 PM

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hey guys.. I have a strange problem which came out of the nowhere..
So I have an AI baseclass and some other Ai´s that are parented to this class..
For any reason everytime the engine tries to get a reference of this class... so if I open this class or if I open a parented class or a map with the class on it ... i get following error:
https://i.imgur.com/RFZ9gn2.png
anyone got something like that before? or knows a fast fix for that?
Thanks in advance guys 🤘

Imgur

lost linden May 15, 2018, 5:52 PM

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its something else. That is just the culmination of the debugged error. This is a problem elsewhere that causes this. Something to do with the AIPerceptionComponent it looks like.

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AISenseConfig_Sight is the asset not being fully loaded though so check that too

glad knot May 15, 2018, 7:16 PM

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yes you´re right with that.. everything works again if I take a backup file of the class (with different name) open it and remove the sight sense from the perception system and switch the version without the perception with the old version..

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the problem is just that if I implement the sight system again it crashes again

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but only after I restart the project.. after implementing and not restart everything works fine

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very strange

surreal latch May 15, 2018, 10:05 PM

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ya wanna know what's even worse, in this case the thing it's complaining about is actually harmless

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i.e. it would actually load and work fine except for the fact that it's triggering the assertion

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the fastest/easiest fix is to remove the component from the base class, and add it only to the child classes. Obviously that approach doesn't really scale to multiple levels of inheritance. And it's also not a viable option if you actually need component inheritance for this case

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for most objects, it is perfectly safe to replace a non-fully loaded object

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that assertion was originally meant for cases back in UE3 where additional tear down of the object was required, such as releasing GPU resources. AI doesn't really have that issue, so the assertion isn't really helpful in this case, but gets triggered anyway.

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long story short: it's an engine bug. there's no way to fix it from your side. You just have to workaround it by not adding the component to the base class, I think

proven grove May 16, 2018, 1:33 AM

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why are there still things in here that have been marked as deprecated since 4.3

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why has no one removed them

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i think it's been long enough to say its safe that no one is using them anymore

small cobalt May 16, 2018, 5:11 AM

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Maintaining an code base as large as UE4 is not an easy/simple task @proven grove

proven grove May 16, 2018, 5:11 AM

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i did manage to remove those deprecated things as well

small cobalt May 16, 2018, 5:11 AM

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Submit PRs with the deprecated functions removed, making sure that they arent still used.

proven grove May 16, 2018, 5:11 AM

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it compiled and ran fine

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testing the code didnt break anything

small cobalt May 16, 2018, 5:13 AM

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That you know of.

proven grove May 16, 2018, 5:13 AM

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true

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works on my machine™

glad knot May 16, 2018, 8:25 AM

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@surreal latch thanks for your post!! Yeah I figured out that I will need to do a workaround what is pretty terrible since the base class is already very complex and has a lot going on with the perception system since it´s a multiplayer game with a lot of AI´s and players... Thank you for your help!! I will try to find a workaround 😦

hexed cipher May 16, 2018, 2:21 PM

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Is the source code build of 19 supposed to be 40+ GB? 😧

royal glacier May 16, 2018, 2:22 PM

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eyup

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source will be pretty small, under 1gig

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but once you build it, you're in for a wild storage ride

elder falcon May 16, 2018, 2:31 PM

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my unreal folder is currently 84GB

lost linden May 16, 2018, 2:50 PM

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how much of that is intermediate and saved files?

elder falcon May 16, 2018, 3:10 PM

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30GB

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lots of big intermediate files in the binaries folder too

lost linden May 16, 2018, 3:17 PM

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i've been tempted to have a dedicated drive for those folders using symbolic links they get so large with a development and debug build

elder falcon May 16, 2018, 3:38 PM

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why not just put the whole engine folder on another drive?

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much simpler

hexed cipher May 16, 2018, 5:18 PM

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So I'm buying a new 2TB just for my UE4 stuff.

limber jacinth May 16, 2018, 6:32 PM

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how comes it is quicker to compile using the launcher version of UE 4.19 but slower using my built engine?

low dust May 16, 2018, 7:21 PM

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@hexed cipher you actually get it to fit into 40 GB?

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I thought it took like 50-60 at minimum

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my UE4 folder is 80-90 GB

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@limber jacinth only for first compiles per project

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it needs to compile some stuff it hasn't done already when you package

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if you mean that

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it literally have to recompile the engine core again afaik if you package with shipping for example

limber jacinth May 16, 2018, 7:26 PM

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nope it does it every compile

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just seems to take forever for recompiles i even tested it on just a blank c++ template

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consecutive recompiles are slow

proven grove May 16, 2018, 9:46 PM

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https://docs.unrealengine.com/en-us/Programming/UnrealBuildSystem/IWYUReferenceGuide
it states near the end of the document that

If you want your game to opt-in to IWYU, there are a few tips to keep in mind:

Include CoreMinimal.h at the top of each header file.```
but isnt this a monolithic header file?
shouldnt you want to avoid inculding this if at all possible?

lost linden May 16, 2018, 9:47 PM

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no its Core Minimal. Unless you dont need anything UE4 related for your code

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Engine.h is the monolithic one

proven grove May 16, 2018, 9:47 PM

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would it technically be better to directly import the files with macros in them instead of that tho

lost linden May 16, 2018, 9:48 PM

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Not sure. I just add what I need to reference since they went IWYU

proven grove May 16, 2018, 9:49 PM

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it has a ton of math and template includes in it, as well as the macro files

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so i think it would technically be more efficient to just include the object and macro files instead of coreminimal

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for that 1 second less compile time

lost linden May 16, 2018, 9:50 PM

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probably

proven grove May 16, 2018, 9:50 PM

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well, time to start working on a pull request

lost linden May 16, 2018, 9:50 PM

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but yeah its only compile time so if you are using something like Live++, its not even an issue unless you are rebuilding the engine anyway

proven grove May 16, 2018, 9:50 PM

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i have to rebuild the engine more than i want to admit

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i break stuff in it pretty frequently

lost linden May 16, 2018, 9:50 PM

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heh. I've done a bit of that today

proven grove May 16, 2018, 9:54 PM

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it takes me about 3 hours to fully rebuild ue4

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and about half an hour if i need to partially rebuild it

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cries in dual core i3

gloomy hamlet May 16, 2018, 10:28 PM

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@proven grove It's not going to improve compile times in practice because CoreMinimal is already included in the precompiled header for the Core module, which all your modules will be using.

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In theory yeah your code is slightly cleaner if you directly include only what you need, but with a codebase this big you have to draw the line somewhere.

proven grove May 16, 2018, 10:30 PM

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but what if i remove coreminimal entirely from the code base

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i think i have a few years spare

gloomy hamlet May 16, 2018, 10:32 PM

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Haha. Well at the end of the day, if the files that CoreMinimal includes end up in the shared pch of the Core module, then it still wouldn't make any difference.

proven grove May 16, 2018, 10:33 PM

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it could still make the files a bit nicer to deal with for future users

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theres no reason not to do it

gloomy hamlet May 16, 2018, 10:34 PM

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Well, if you end up needing to add the same 5-10 includes at the top of 90% of your headers, arguably that tradeoff isn't worth it.

proven grove May 16, 2018, 10:35 PM

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dont remove coreminimal, just limit it's usage in source files

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so people can still include it in their actual games

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but the actual engine doesnt rely on it

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it may also reduce the size of the compiled engine

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which would be great for everyone

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i'm to inept to actually add anything to the source, so i might as well try and clean it up a bit

slow ibex May 17, 2018, 7:57 PM

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does anyone know where the bone weights are stored ? I need to extract animation data using c++, I've already extracted the bone position, from the animationsequence but I cannot find where the weights are 😥

stable hemlock May 18, 2018, 6:36 PM

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can somebody point out the github source build for niagara

proven grove May 19, 2018, 2:19 AM

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i just went looking through unreals source code for tarray

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...

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it just wraps std::vector

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i was expecting something diffrent tbh

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or im an idiot and theres 2 diffrent definitions of tarray

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because of course there are

small cobalt May 19, 2018, 2:21 AM

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Most of the types in UE4 are wrappers for an std type

proven grove May 19, 2018, 2:23 AM

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why not just use the std type then?

small cobalt May 19, 2018, 2:24 AM

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I would imagine that part of the reason would be that they arent flexible enough?

elder falcon May 19, 2018, 11:59 AM

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TArray does absolutely not wrap std::vector

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you don't use the std type because TArray is faster, and the api much nicer than std

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none of this begin, end garbage

gray glade May 19, 2018, 6:52 PM

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Yeah, we don't use the STD stuff at all, AFAIK.

proven grove May 20, 2018, 5:17 AM

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there are two seprate definitions of tarray

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one of them does just wrap std::vector

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the other one does not

regal yoke May 20, 2018, 10:22 PM

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Hello! So i'm very new to the engine source code, but i've been doing c++ for several years now. I want to change some of the behavior of the geometry mode. Specifically the widget functionality. Anyone know a thing or two about the widget functionality?

lost linden May 20, 2018, 10:54 PM

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yeah some. You looking to make an Editor Module then?

regal yoke May 20, 2018, 11:00 PM

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or edit the one that exists

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obviously I might be over ambitious but I just want to learn about how the widget works but I don't know where it's functionality resides

elder falcon May 20, 2018, 11:04 PM

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@proven grove there is definitely no such thing

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the only definition of TArray is in Array.h

stiff geyser May 21, 2018, 11:48 AM

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hello, I had a project which made with 4.15.1 version

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I tried it open with 4.18 it gives me error

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and when I tried open it 4.15.3 I cant see any assets

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D:/15.3/KayyenUE/Content/haritalar/Beklerken.umap is a UE4 map [File:v513], from an engine release newer than this [Cur:v510].```

elder falcon May 21, 2018, 2:08 PM

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If you saved anything with 4.18 you won't be able to open it in an older version again

astral sapphire May 22, 2018, 11:19 AM

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Greetings!

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I have a nerd question. Is it possible to compile a windows ue4 version on *nix?

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found this page https://wiki.unrealengine.com/Building_On_Linux but not sure if it's up to date

Building On Linux

elder falcon May 22, 2018, 1:33 PM

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no, cross compile is only supported the other way around

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@astral sapphire

astral sapphire May 22, 2018, 1:34 PM

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@elder falcon so the wiki is outdated?

elder falcon May 22, 2018, 1:34 PM

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the wiki page you linked is about building a linux version on linux

astral sapphire May 22, 2018, 1:39 PM

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@elder falcon dang, i knew something was fishy about this guide

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well, ok ;_;

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ty for help anyway

atomic radish May 22, 2018, 5:26 PM

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I've been trying to find a cause for what appears to be a major memory leak and significant rendering performance regression in between 4.18.1 and 4.19.0, allegedly related to nvidia graphics driver. I failed to pin point the cause in the code so far. Perhaps someone is aware of the underlying cause ?

lost linden May 22, 2018, 6:24 PM

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All I know is that if I have geforce experience overlay enabled with unreal, my fps dies. I also had issues with the last drivers.

proven grove May 22, 2018, 11:14 PM

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my recommendation would be to go through the commit history and try commenting out parts of the code commited until the memory leak stops

elder falcon May 22, 2018, 11:31 PM

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you can't exactly do that when there are like half a million changes between 4.18.1 and 4.19

lost linden May 22, 2018, 11:33 PM

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Anyone know if the editor keeps any Unique references to objects placed within assets? I know there is UObject->GetUniqueID but that isn't static.

elder falcon May 22, 2018, 11:34 PM

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objects placed within assets?

lost linden May 22, 2018, 11:34 PM

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yeah lets say I open a Widget blueprint and place a Button. For the life of that asset, it keeps the UniqueID, but if you close the asset, it gets destroyed and the ID is refreshed next construct

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I need something more permanent.

elder falcon May 22, 2018, 11:35 PM

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don't think there is anything like that?

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you've got the package containing a widget blueprint and then it has "a" button but that's it

lost linden May 22, 2018, 11:37 PM

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my thinking was there may be some unique ID when its serialized with the asset but oh well.

elder falcon May 22, 2018, 11:37 PM

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why would you need this?

lost linden May 22, 2018, 11:38 PM

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I have an Object that keeps track of Detail Panel customisations for each widget. It can only work with a unique ID though

gray glade May 22, 2018, 11:38 PM

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Object names are unique ids

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And they're serialized and persisted where relevant.

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If it's renamed, obviously not, but there is not otherwise a generic GUID system for objects - their name is their GUID and is mutable.

lost linden May 22, 2018, 11:40 PM

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that makes life a bit tougher 😦

elder falcon May 22, 2018, 11:40 PM

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isn't the object name just going to be something like "Button_0"?

gray glade May 22, 2018, 11:40 PM

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The nomenclature (pun-intended) is a mess and I have my qualms with it

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Object names also refer the fully qualified path.

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Like /Transient/LoadedMapWorld.SomeActor.SomeComponent

lost linden May 22, 2018, 11:41 PM

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would there be a way to hook a listener onto the Widget renaming function?

gray glade May 22, 2018, 11:42 PM

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I am not familiar with any such delegate, but that doesn't mean there isn't one

lost linden May 22, 2018, 11:42 PM

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ill browse when my eyes are rested. cheers

gray glade May 22, 2018, 11:42 PM

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👍

surreal latch May 22, 2018, 11:49 PM

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what are your qualms with the naming convention?

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just curious

gray glade May 23, 2018, 12:01 AM

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The whole object/package name/path thing is all hella confusing to me.

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I expect name to be the things individual name, without path information.

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I expect path to be the full path, with the name.

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I've seen parts of the API do otherwise.

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And I've seen parts of the API be inconsistent.

surreal latch May 23, 2018, 12:08 AM

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yeah, it used to be more consistent in UE3 days

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really wish they'

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d just created separate classes for object name vs object path

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when they moved to UE4..

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Not that that would have solved all the problems, of course

elder falcon May 23, 2018, 12:09 AM

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wtf, why does unreal not support ipv6 on platforms other than ios?

surreal latch May 23, 2018, 12:12 AM

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looks like it's supported on linux and mac as well

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i think some of the console platforms support v6 by default as well

elder falcon May 23, 2018, 12:13 AM

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yet it's not supported on the most important platform... this makes no sense

surreal latch May 23, 2018, 12:14 AM

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you mean linux? 😛

elder falcon May 23, 2018, 12:15 AM

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windows, of course

surreal latch May 23, 2018, 12:15 AM

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yeah just messing with ya. you could always try enabling PLATFORM_HAS_BSD_IPV6_SOCKETS in WindowsPlatform.h, and see what happens

elder falcon May 23, 2018, 12:16 AM

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oof that sounds like a full rebuild :D

surreal latch May 23, 2018, 12:16 AM

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indeed

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:\

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the ipv6 code appears to be there. not sure why it's not enabled by default.. course my source is at 4.17, so maybe they've enabled it in newer versions?

elder falcon May 23, 2018, 12:18 AM

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that define only seems to enable the ipv6 socket subsystem, but it's not being used by any important platforms https://i.imgur.com/dyuUW3s.png

Imgur

surreal latch May 23, 2018, 12:20 AM

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don't think it would be too hard to get it working, but yeah, you'd need to switch to source building

elder falcon May 23, 2018, 12:20 AM

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UIpConnection expects to be able to pass the address around as int32

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well this is annoying

elder falcon May 23, 2018, 2:30 AM

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made it work on windows like this https://github.com/EpicGames/UnrealEngine/commit/35e2d51b5ff8705dfdb9ec679b9e0c458ee76455

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not sure about mac/linux yet

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btw. why is my commit from my fork visible on the main repo ...?

surreal latch May 23, 2018, 2:35 AM

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sort of looks like you committed straight to the main repo

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but my git-foo is still pretty weak

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maybe I'm misreading that

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nice work, btw

elder falcon May 23, 2018, 2:40 AM

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well I pushed the commit to a private fork

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but somehow you can access it in the main one if you have the correct hash

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let's see if I can find other more interesting forks :O

steep bear May 23, 2018, 3:15 AM

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Has anyone created a swarm agent for mobile devices to help bake times?

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i mean its not like they are gonna do a lot but i'm sitting 6 hours in with 2 pcs and looking at another 3 before its done, even a mobile app to tell me the bake % would be nice

wicked hill May 23, 2018, 9:54 AM

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Hi ! Does someone know how to make a task (using taskgraph) that could be executed on high priority threads AND on gamethread ? If GetDesiredThread() is set to return ENamedThreads::AnyThread, calling FTaskGraphInterface::Get().ProcessThreadUntilIdle( ENamedThreads::GameThread ); make the gamethread wait and do nothing while the high priority threads are working.

sick pivot May 23, 2018, 2:21 PM

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I"m getting this error from a new project i'm teaming up with... i've had 4.19 on my machine for a while now and compiled fine with VS2015.... is there some custom setting in a .ini file that would make it so i need to have 2017 installed to compile an Engine Source?

UnrealBuildTool : error : Visual Studio 2017 must be installed in order to build this target.

elder falcon May 23, 2018, 2:29 PM

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is there any reason why you don't want to use the newer, better, faster version of vs?

sick pivot May 23, 2018, 2:36 PM

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@elder falcon - no i'm not against it.... i'm sure its time to change anyways. at first 2017 versions were chaos in forums/discord channels with UE4 builds.... i'm seeing tons of other people talking success these days with using it.

elder falcon May 23, 2018, 2:36 PM

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it's working perfectly fine

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just make sure you get the proper packages

sick pivot May 23, 2018, 2:37 PM

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roger that - guess its no time like the now to change 😃

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https://docs.unrealengine.com/en-us/Programming/Development/VisualStudioSetup

elder falcon May 23, 2018, 3:26 PM

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if you are going to build the engine, you also need c++ desktop dev and .net desktop dev

elder falcon May 24, 2018, 2:18 PM

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https://github.com/EpicGames/UnrealEngine/commit/d90da4ab1af73942ea27ce8261e5c3520103550b wtf is this?

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https://i.imgur.com/mhhfKQZ.png https://i.imgur.com/9kKHTN0.png why would anyone want this and what is it doing in the engine by default lol

Imgur

hidden hedge May 24, 2018, 2:30 PM

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local anti-addiction laws probably

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shame it's impossible to tell through github

elder falcon May 24, 2018, 2:35 PM

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giant merge commits are one thing but giant merge commits with no description ?

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this is a new low

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this commit has changes for basically every part of the engine

hidden hedge May 24, 2018, 2:53 PM

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it's a merge, if you have perforce access that's your best bet to see them

elder falcon May 24, 2018, 2:54 PM

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well

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last I know is access to that costs a crazy amount of money

spiral mortar May 24, 2018, 3:23 PM

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@elder falcon Does it?

elder falcon May 24, 2018, 3:24 PM

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doesn't it? 🤔

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that's what I heard in this server

spiral mortar May 24, 2018, 3:25 PM

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To dev for consoles you need a perforce access

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Might not be the same though

elder falcon May 24, 2018, 3:26 PM

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interesting

spiral mortar May 24, 2018, 3:26 PM

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Some license issues

atomic radish May 24, 2018, 4:36 PM

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Gents, why exactly CustomDepthTexture is empty in base pass shader, when custom depth pass is done before base pass ?

grim halo May 24, 2018, 5:18 PM

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I'm trying to add a new buffer visualization material

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I tried to make one like any other post process material , but it doesn't work

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after a few hours of debugging it seems the package metadata seems to have a different structure

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anybody know how those uasset files are made?

rain lake May 24, 2018, 11:14 PM

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@elder falcon that commit is the current work on 4.20

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so, yeah, it's a huge commit

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since it's a single merge

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since they put the dev branches on github, you can probably find the commit that added that

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it comes from the fortnite branch though

fathom tusk May 24, 2018, 11:39 PM

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So when I try to cross compile Linux dedicated server from Windows I get spammed with -Wnonportable-include-path errors which breaks the build. I tried adding #pragma clang diagnostics ignored -Wnonportable-include-path to WindowsPlatformCompilerPreSetup.h but it seems to have no effect ... anyone?

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(this is after updating to 4.19 and updating the clang toolchain)

limber jacinth May 25, 2018, 2:57 PM

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whats the most up to date branch

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upstream/dev-core?

lost linden May 25, 2018, 3:00 PM

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master is it not? Not that its advised to use that 😃

limber jacinth May 25, 2018, 3:01 PM

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just want to see what new stuff it has in for gameplay abilities

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so was just going to dupe my project and load it in 😄

lost linden May 25, 2018, 3:03 PM

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last time I used anything other than release was the Promoted branch. At the time it was 4.20 so I figured it was a stable latest release

rain lake May 25, 2018, 8:43 PM

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the most up to date branch is master

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dev branches are not "up to date"

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certain areas have newer features (for example, dev-networking might have newer networking related features than master), but only for the area that the branch is for

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master is where they collect everything together and that's the most bleeding edge version of the engine

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it's buggy though

proven grove May 25, 2018, 10:50 PM

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turns out #include "CoreMinimal" is useless in most source files and can be removed

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just managed to remove it entirely from inputdevice and inputcore

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still compiled perfectly fine

lost linden May 25, 2018, 11:25 PM

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then it really is minimal 😄

small cobalt May 25, 2018, 11:27 PM

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@proven grove I would assume then in that case it is there for Unity builds.

proven grove May 25, 2018, 11:27 PM

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i'm kinda new to the unreal pch thing, whats a unity build?

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@small cobalt

small cobalt May 25, 2018, 11:30 PM

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UBT will combine .cpp files together in order to reduce compile times. This is called an Unity Build

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However this can cause masking of include dependencies

proven grove May 25, 2018, 11:31 PM

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so why would having coreminimal in every file be needed?

small cobalt May 25, 2018, 11:31 PM

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In an non Unity build it is the opposite, UBT will not combine anything, it will compile everything separately and it will complain about every missing include that way.

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So much higher up your dependency chain CoreMinimal might still be getting included, thus in Unity Build everything is fine.

elder falcon May 25, 2018, 11:32 PM

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the bigger question is why does it matter

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include stuff the way epic recommends, problem solved!

proven grove May 25, 2018, 11:33 PM

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if you can remove extra lines of code without affecting stability, it cant be a bad thing

small cobalt May 25, 2018, 11:33 PM

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Using Unity build its fine.

proven grove May 25, 2018, 11:33 PM

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and it reduces compile times marginally for some modules as well

small cobalt May 25, 2018, 11:33 PM

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Just saying, Epic may have included it because of non Unity builds

proven grove May 25, 2018, 11:33 PM

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thanks for explaining that

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i'm kinda new to unreals build system

small cobalt May 25, 2018, 11:34 PM

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👍

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Something to be aware of

elder falcon May 25, 2018, 11:34 PM

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it'd likely still work fine in a non-unity build due to some file you are including already including coreminimal

small cobalt May 25, 2018, 11:34 PM

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Probably

proven grove May 25, 2018, 11:35 PM

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it would only be a problem if you eliminated coreminimal completley, right?

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so there is nothing refrencing it anywhere

small cobalt May 25, 2018, 11:35 PM

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Usually you would use Non Unity Builds to ensure that any subsystem your building is self contained

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Yes

proven grove May 25, 2018, 11:36 PM

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for the time being, removing those includes has gone well, so i might as well continue

small cobalt May 25, 2018, 11:36 PM

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@gray bay Could probably give you an even better explanation of (Non)Unity Builds

proven grove May 25, 2018, 11:36 PM

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the less code there is, the more stable it is, right?

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theres less to go wrong

small cobalt May 25, 2018, 11:37 PM

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You would hope so 😉

proven grove May 25, 2018, 11:37 PM

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ah right, unreal black magic

small cobalt May 25, 2018, 11:37 PM

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There is alot of magic happening in this Engine lol

elder falcon May 26, 2018, 12:16 AM

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@rain lake you seem to be involved with 4.20 stuff, do you have any clue if being unable to open .dmp files generated by shipping builds on windows 10 is getting a fix?

rain lake May 26, 2018, 12:16 AM

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im not involved at all, i just know how it works

elder falcon May 26, 2018, 12:16 AM

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oh rip

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for some reason there is like ultimate secrecy around this issue

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noone wants to talk about it

rain lake May 26, 2018, 12:17 AM

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i didnt even know it was a bug

elder falcon May 26, 2018, 12:17 AM

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it has been for a long time https://forums.unrealengine.com/development-discussion/c-gameplay-programming/1396585-the-win-10-fall-creators-update-broke-debugging-dmp-files-generated-by-ue4-workaround-here

Unreal Engine Forums

A few weeks ago I noticed that I suddenly could no longer open any of the generated .dmp files in Visual Studio that are generated when the packaged game

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the "workaround" involves shipping the game with dll files uploaded by a user so is extremely sketchy

wooden tusk May 26, 2018, 1:07 AM

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That is really sketchy

elder falcon May 26, 2018, 1:10 AM

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I've actually found a post on answerhub that has the files uploaded by a staff member so less sketchy https://answers.unrealengine.com/questions/744933/unable-to-debug-dmp-files-created-in-windows-10.html

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interesting that the files uploaded by them do not match the ones uploaded by the user

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different size even

proven grove May 26, 2018, 1:37 AM

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something tells me the first ones are probably malicious

dense wharf May 26, 2018, 3:25 AM

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how often do I need to build my project in VS? Is it just the first time I create it and that's all?

small cobalt May 26, 2018, 3:26 AM

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If you add any new Code you need to recompile...

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If you mean the Engine, you only have to build that once, unless you make changes to the Engine.

dense wharf May 26, 2018, 3:27 AM

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Not the engine, just my project. I converted it to a source project. But I haven't made any changes in actual c++ code, I'm still doing all my development in the regular engine

small cobalt May 26, 2018, 3:27 AM

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Yeah ok so you only have to Compile it once then.

dense wharf May 26, 2018, 3:28 AM

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okay cool thanks just wanted to be sure

proven grove May 26, 2018, 3:37 AM

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when compiling the engine it saysUsing 'git status' to determine working set for adaptive non-unity build. Performing full C++ include scan (no include cache file) =in the command propt, what does nthis actually mean?

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i know its something to do with iwyu and pchs, but im not sure what

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and it takes ages as well

elder falcon May 26, 2018, 3:46 AM

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first one uses git status to detect which cpp files have been modified and should be excluded from unity build for faster changes

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second one parses includes in all headers and cpp files and lets ubt know which cpps need to be compiled when which headers change

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once it has the include cache file, it can use this info to quickly build all affected cpps after you change a header

proven grove May 26, 2018, 4:28 AM

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it still has to perform over 800 actions even after changing just 3 files

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but seeing how massive and noodly unreal is, thats probably normal

dense wharf May 26, 2018, 4:33 AM

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testing my ded server is giving me a few "unknown structure" errors. Any idea why? I'm getting no errors in the editor and the structs seem fine..