trying to convert functions to c++ how do I change target to scene component

Question

grapplecomponent.h

 protected:
    virtual void BeginPlay() override;
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        bool m_hooked;
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        bool m_hookfinished;
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        FVector m_hook_location;
    UFUNCTION(BlueprintCallable)
        void m_set_visibility(const bool new_visibility, const bool propagate_to_children);
    UFUNCTION(BlueprintCallable)
        void m_setworldlocation(const FVector& new_location, const bool sweep, const bool teleport, FHitResult& sweep_hit_result);

grapplecomponent.cpp

void Agrapplecomponent:: m_set_visibility(const bool new_visibility, const bool propagate_to_children)
{
    
}

void Agrapplecomponent::m_setworldlocation(const FVector& new_location, const bool sweep, const bool teleport, FHitResult& sweep_hit_result)
{
    
} 

I have no idea how to change the target of m_setworldlocation and m_set_visibility to scene component like the normal blueprint function does how do I fix this? the stuff that starts with an M are converted to c++

Answer 1

The SetVisibility and SetWorldLocation functions already have a C ++ implementation.

Better to call the entire function from C ++:

//.h
UFUNCTION(BlueprintCallable)
    void StopGrapple();
//.cpp
void Agrapplecomponent::StopGrapple()
{
    FVector Location(0.f, 0.f, 0.f);
    m_hooked = false;
    m_hookfinished = false;
    GrappleHookCable->SetVisibility(false);
    GrappleHookCable->SetWorldLocation(Location);
}

Update

In the Blueprint, change the name of the GrappleHookCable to BlueprintGrappleHookCable. Save and Compile. Close UE.

In {ProjectName}.build.cs add "CustomMeshComponent"

PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", "HeadMountedDisplay", "UMG", "CustomMeshComponent"});

Character:

//.h

#include "CustomMeshComponent.h"


UPROPERTY(VisibleDefaultsOnly, BlueprintReadOnly)
UCustomMeshComponent*   GrappleHookCable;

//.cpp

Construct
{
    GrappleHookCable = CreateDefaultSubobject<UCustomMeshComponent>(TEXT("GrappleHookCable"));
    GrappleHookCable->SetupAttachment(GetRootComponent());
}

Compile. Open project. Open Blueprint. Variables -> Components -> Right click "BlueprintGrappleHookCable" -> Replace Reference.

Find "GrappleHookCable" in "Replace with". Turn on "Only show and replace result from ...". Click "Find and Replace References in ..."