How to add a World Rotation to an Actor

Development Programming & Scripting
1

Hello guys.

I’ve made a similar project using Blueprints, now I’m moving to a C++ project, since I am an experienced programmer in C++. The problem is… that I’m not experienced with Unreal Engine classes lol

I would create an Actor that would rotate around his Z axis every second.

With blueprints, I did so:

68452-opopo.png

How to do this with a C++ Class?
I did this:

68453-opopo.png

But it doesn’t work when the game starts.

Thanks in advance!

2 Likes
2

Every tick you set actor’s rotation to (0,0,0) and then add (0,0,4) to it, resulting rotation is always (0,0,4). Remove SetActorRotation().

3

void APickup::Tick( float DeltaTime )
{
Super::Tick( DeltaTime );

	FRotator rotation = FRotator(0.f, 0.f, RotationSpeed);
	AddActorLocalRotation(rotation * DeltaTime);
}

This doesn’t work. (RotationSpeed is 4.f)

4

That’s weird, just to be sure I tried this on a random class and it works. I don’t know any more context so can’t say much. Try this:
Include “Engine.h” and then add this line to your tick function

GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Red, FString::Printf(TEXT("rotation: %s"), *rotation.ToString()));

It should print the rotation variable

5

Nothing gets printed out

// Called every frame
void APickup::Tick( float DeltaTime )
{
	Super::Tick( DeltaTime );

	FRotator rotation = FRotator(0.f, 0.f, RotationSpeed);
	AddActorLocalRotation(rotation * DeltaTime);

	GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Red, FString::Printf(TEXT("rotation: %s"), *rotation.ToString()));
}
6

It seems that for some reason tick function is not being executed. Post the code of your class please.
But before you do that try this:add this line

PrimaryActorTick.bCanEverTick = true;

to constructor and compile

7

Oh my gosh, I don’t know for which reason I had that disabled. I didn’t even checked that.

Thanks!