BlueprintCallable UFUNCTION

Type Mapping

Mapping Fundamental Types

Blueprint	C++
Float	float
-	double
Integer	int32
-	uint32
Integer64	int64
-	uint64
Bool	bool

Mapping Utility Types

Blueprint FString

Blueprint	C++
String	FString
Name	FName
Vector	FVector
Rotator	FRotator
Transform	FTransform

Mapping Object Types

Blueprint	C++
Object	UObject*
Actor	AActor*
ActorComponent	UActorComponent*

Creating C++ Function

Add to Grabber.h the below:

UFUNCTION(BlueprintCallable, BlueprintPure)
FVector GetMaxGrabLocation() const;

Ctrl+. and create definition.

Also tip: Ctrl-K Ctrl-O to swtich between .cpp and .h

Add the #include:

#include "Kismet/KismetMathLibrary.h"

Add the code:

FVector UGrabber::GetMaxGrabLocation() const
{
    return GetComponentLocation() + UKismetMathLibrary::GetForwardVector(GetComponentRotation()) * MaxGrabDistance;
}

Ctrl-Shift-B to compile and we’ll see the blueprint now complains because grabber already exists.

Now check references and see that all references have already been replaced with the C++ version. Simply delete the Blueprint version and compile.

Now you should still be able to grab the pumpkin, but we have replaced the BP function with a C++ one.