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Change Antialiasing method from C++

Is there a way to change the antialiasing method between FXAA and Temporal AA from C++? I'm trying to put this ability in a game settings menu, and so far I haven't seen a way to actually switch the method, say through GEngine->GameUserSettings.

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asked Oct 23 '14 at 05:28 PM in C++ Programming

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2 answers: sort voted first

It's possible. You can change console variable r.DefaultFeature.AntiAliasing by C++ code

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answered Oct 23 '14 at 05:46 PM

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avatar image reynoldsa14 Oct 23 '14 at 07:32 PM

And, sorry, how do I change a console variable from C++?

avatar image TimGS Oct 23 '14 at 08:25 PM

If you want to do some action and be sure that AA is set before then use

IConsoleManager::Get()->FindConsoleVariable(TEXT("r.DefaultFeature.AntiAliasing")) to get your AA variable, set callback for it https://docs.unrealengine.com/latest/INT/API/Runtime/Core/HAL/IConsoleVariable/SetOnChangedCallback/index.html and then set it https://docs.unrealengine.com/latest/INT/API/Runtime/Core/HAL/IConsoleVariable/Set/2/index.html

But read cautions before

avatar image reynoldsa14 Oct 23 '14 at 08:31 PM

No, thanks, the first one did it. Is there a built in way to make that persist, e.g. writing to DefaultEngine.ini, or do I have to roll my own?

avatar image TimGS Oct 23 '14 at 08:42 PM

Of course you can write to ini. Use global GConfig variable and its function SetInt() https://docs.unrealengine.com/latest/INT/API/Runtime/Core/Misc/FConfigCacheIni/SetInt/index.html and use another variable GEngineIni as Filename argument. It won't write to default ini, though, but it will write to user-specific ini which overrides default settings.

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Check out the UGameUserSettings class. From there you can access anti-aliasing settings.

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answered Oct 23 '14 at 07:57 PM

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avatar image DCVolo Nov 13 '17 at 03:52 PM

Thanks ! That's the right way to do it :)

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