Trace channels

[FreakishGrape]

Hey guys, im a beginner at c++ and just started learning ue5 so im sure im just doing something wrong here, but im creating an interaction system and everythings going well so far but i cant seem to link my custom trace channel to my c++ code. Ive got a custom trace channel that i want my interaction line trace to use that i set up in project settings, but when i call LineTraceSingleByChannel() in my c++ code the custom trace channel wont show up in the ECollisionChannel parameter field. How cam I get my line trace to only happen on my custom trace channel?

[Fortron]

How to create Custom ECollisionChannel in C++

ECollisionChannel is an enum, so you cannot create extra collision channels at runtime with C++. However you can define and use up to 18 extra GameTraceChannels as described here: Once you have defined your customer GameTraceChannel you can use SetCollisionObjectType to assign it to an actor: GetStaticMesh(MyActorMesh)->SetCollisionObjectType(ECollisionChannel::ECC_GameTraceChannel1);

First answer of this post will lead you here, where you’ll “define” your custom channels.

Then you’ll be able to use them under collision presets in blueprints;

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For the C++ part, If you look at the DefaultEngine.ini, you’ll se something like this:

ECC_GameTraceChannel::ECC_GameTraceChannel1/2/3/… are surpluses the engine leaves to you to define as you want.

You can even sugarcoat them to your liking;

And use them like this;