C++ Cast NPC Character into Player Character

Development Programming & Scripting C++
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1

Hello World, C++ noob here. I have a project made in blueprint, and I’m trying to convert everything in C++.
I’m having only 1 problem. I have an NPC Character (NPCInteractive), an AI, and I want to cast it into my Player Character, because I have fonctions into my NPC that I want to call in my Player. Here is the CPP file:

    #include "WithLoveFromTahitiCharacter.h"
    #include "NPCInteractive.h"
    
    	// launch dialogue input
PlayerInputComponent->BindAction("LaunchDialogue", IE_Released, this, &AWithLoveFromTahitiCharacter::LaunchDialogue);
    
    void AWithLoveFromTahitiCharacter::LaunchDialogue()
    {
    	ANPCInteractive* NPCInteractive = Cast<ANPCInteractive>(GetOwner());
    
    	if (NPCInteractive != nullptr)
    	{
    		UE_LOG(LogTemp, Warning, TEXT("OVERLAP"))
    	}
    	else
    	{
    		UE_LOG(LogTemp, Warning, TEXT("NULL"))
    	}
    }

When I press the LaunchDialogue button, it return always NULL

Here is the .h file:

#include "WithLoveFromTahitiCharacter.generated.h"

class ANPCInteractive;

UCLASS(config=Game)
class AWithLoveFromTahitiCharacter : public ACharacter
{
 ...
}

Thank you for your help guys and sorry for my english (I’m stuck for 1 week now lol).

2

I’m really not sure what exactly you want to achieve.
How I understand what you want…
On Button Press you want to interact with an NPC.
And the Interaction is defined inside the NPC.

What I would do:
-On Button Press-> Get all overlapping actors of class npc / use traces to get the npc (depends on your System)
-Use the NPC reference to call your function

3

Hello sir, sorry for the late, you’re right, here is the blueprint for more details

245640-overlap.png
245640-overlap.png1916×1164 445 KB

4

So why dont you Just reproduce the blueprints in c++? They seem to be decent.
There should be more than enough resources to find about Bindung to the overlap Events in c++
And you should be good to go. Because currently you are missing any reference to the NPC so your cast will always fail

5

In the first post, I was just trying to understand how Cast work and yes right now I’m working with a OnComponentBeginOverlap event with cast, still not working XD but, I’m still learning :slight_smile: