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Replication of TScriptInterface C++


I have problems with getting my interface to replicate. I have a BaseItemInterface and different Items that implements the interface. I try to replicate the interface something like this:


TScriptInterface< BaseItemInterface > MyInterface;

It doesnt work.

But when I replicate my raw Item class, ex. ToolItem


ToolItem* MyItem;

It works for that object.

Can UE4 handle Interface objects Replication or do I need to add some more code anywhere? I've done the bReplicates = true & DOREPLIFETIME(YOUR_CLASS_NAME, PropName); thingy according to https://wiki.unrealengine.com/Networking/Replication


Product Version: UE 4.8
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asked Aug 20 '15 at 02:03 PM in C++ Programming

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TScriptInterface<..> does not currently get replicated by UE4. I actually think it should give an error when you try to do it, but it just silently fails.

Anyway, TScriptInterface<..> is basically just two things, a pointer to your UObject, and then a cached pointer to the Interface part of your UObject that you're interested in.

The way I would do it right now, given the current limitations, would be to replicate a regular UObject or AActor pointer as a private property, and give access to getting/setting it through public members which only allow TScriptInterface<..> as the argument. The getter would cast from the UObject property to the interface that you want. Enforcing it this way would reduce the chances that a mistake is made elsewhere in the code.

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answered Aug 20 '15 at 02:17 PM

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avatar image State128 Aug 21 '15 at 10:25 AM

Thanks for clarifying that, it make sense.
I'll have to implement some sort of type translation as you mentioned.

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