How can I Create custom collision Object Type and make it avaliable in C++?

Development World Creation
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1

So I created an Object type in the project settings, it’s name is Item.
I try to define it inside of c++ code:
pickupTrigger->SetCollisionObjectType(xxx);

but apparently I don’t have and option of Item, I guess the editor defined new object type is not being aware by the c++ code…

So how can I make it avaliable here?

Thanks,

JT

2

You either need to add them here by modifying engine:

https://github.com/EpicGames/UnrealEngine/blob/55c9f3ba0010e2e483d49a4cd378f36a46601fad/Engine/Source/Runtime/Engine/Classes/Engine/EngineTypes.h#L581

Or use less invasive option and use one of 18 custom collision channels from ECC_GameTraceChannel1 - ECC_GameTraceChannel18. Editor settings give you option to name them for blueprint and property lists views:

You can check them up in defult configs to make sure they have right number assign, here example from template:

https://github.com/EpicGames/UnrealEngine/blob/55c9f3ba0010e2e483d49a4cd378f36a46601fad/Templates/TP_FirstPerson/Config/DefaultEngine.ini#L2

For C++ you can use this small macro hack in one of your main header file to make more natural name:

#define EEC_NameOfChannel EEC_GameTraceChannel1
3

thanks, but the first link you give me has 404 page not found issue :frowning:

4

Yes you can, you have to set up a collision profile in the config that uses this type and then just call SetCollisionProfileName(FName Name)

That should do it.

5

Thats because you need to tie your github account with ue4 account to get access to engine source code there. follow first 2 sections there: