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Interface RPC?


I am trying to create an "Interaction" interface that is using RPCs. Browsing the forums and the Answer Hub, I think it should be possible, but I haven't found an actual working example.

I have created an interface called "I_Interaction" with a "StartInteraction()" and a "StopInteraction()" function:


 #pragma once
 #include "I_Interaction.generated.h"
 class MYGAME_API UI_Interaction : public UInterface
 class MYGAME_API II_Interaction
     //Interface Functions
     UFUNCTION(Server, Reliable, WithValidation)
     virtual void StartInteraction();
     UFUNCTION(Server, Reliable, WithValidation)
     virtual void StopInteraction();


 #include "MYGAME.h"
 #include "I_Interaction.h"
 UI_Interaction::UI_Interaction(const class FObjectInitializer& ObjectInitializer) :Super(ObjectInitializer)

I am implementing the interface in an AActor derived class called "EQ_Overlord"


 #pragma once
 #include "Interface/I_Interaction.h"
 #include "Entity/Entity_Overlord.h"
 #include "EQ_Overlord.generated.h"
 class MYGAME_API AEQ_Overlord : public AEntity_Overlord, public II_Interaction
     //Declaring Constructor
     public: AEQ_Overlord();
     virtual void StartInteraction_Implementation() override;
     virtual void StopInteraction_Implementation() override;


 #include "MYGAME.h"
 #include "EQ_Overlord.h"
 AEQ_Overlord::AEQ_Overlord() :Super()
 //Interface Functions
 bool AEQ_Overlord::StartInteraction_Validate()
     return true;
 void AEQ_Overlord::StartInteraction_Implementation()
 bool AEQ_Overlord::StopInteraction_Validate()
     return true;
 void AEQ_Overlord::StopInteraction_Implementation()

I cannot compile this, I get the following errors:

  error C2509: 'StartInteraction_Validate': member function not declared in 'AEQ_Overlord'
 error C2509: 'StopInteraction_Validate': member function not declared in 'AEQ_Overlord'

Now what confuses me is that as far as I know, both an RPC and an Interface function should use an "_Implementation" suffix. How do I get around this? I have tried many other options, but I couldn't even get it to compile.

Is even calling RPCs through an interface possible? If so, how? I hope someone can shine some light on this for me.


Product Version: UE 4.15
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asked Apr 29 '17 at 04:22 AM in C++ Programming

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avatar image Kontur May 02 '17 at 06:34 AM

bumping this, as it is still unresolved

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