How do I use RotateVector in C++?

Development Programming & Scripting C++
3

Thanks Rama :slight_smile: I ended up doing this:



		// Create the Launch Impulse Vector.
		FVector LaunchImpulse = FVector(ScreenEdgeImpulse, ScreenEdgeImpulse, 0.0f);

		// Get the Rotator that we want to rotate the Impulse by for each mesh.
		FRotator RotateLightWisp = FRotationMatrix::MakeFromX(DarkWispLoc - LightWispLoc).Rotator();
		FRotator RotateDarkWisp = FRotationMatrix::MakeFromX(-DarkWispLoc + LightWispLoc).Rotator();
		
		//FRotator RotateLightWisp = UKismetMathLibrary::FindLookAtRotation(DarkWispLoc, LightWispLoc);
		//FRotator RotateDarkWisp = UKismetMathLibrary::FindLookAtRotation(LightWispLoc, DarkWispLoc);

		// Rotate the launch vector by the rotation
		FVector LightWispLaunchImpulse = FRotator(RotateLightWisp).RotateVector(LaunchImpulse);
		FVector DarkWispLaunchImpulse = FRotator(RotateDarkWisp).RotateVector(LaunchImpulse);

		LightWispMesh->AddImpulse(LightWispLaunchImpulse, NAME_None, true);
		DarkWispMesh->AddImpulse(DarkWispLaunchImpulse, NAME_None, true);

My next question is… why can I not get input from the keyboard for whatever reason?



void AWispPawn::Tick(float DeltaSeconds)
{
	Super::Tick(DeltaSeconds);

	//FVector RepulsionImpulse = (WispRepulsionImpulse, WispRepulsionImpulse, 0.0f);

	FVector DarkWispLoc = (DarkWispMesh->GetComponentLocation());
	FVector LightWispLoc = (LightWispMesh->GetComponentLocation());

	// Check to see if we are too far apart already.
	if (DistanceBetweenWisps() > 3200.0f)
	{
		// Create the Launch Impulse Vector.
		FVector LaunchImpulse = FVector(ScreenEdgeImpulse, ScreenEdgeImpulse, 0.0f);

		// Get the Rotator that we want to rotate the Impulse by for each mesh.
		FRotator RotateLightWisp = FRotationMatrix::MakeFromX(DarkWispLoc - LightWispLoc).Rotator();
		FRotator RotateDarkWisp = FRotationMatrix::MakeFromX(-DarkWispLoc + LightWispLoc).Rotator();
		
		//FRotator RotateLightWisp = UKismetMathLibrary::FindLookAtRotation(DarkWispLoc, LightWispLoc);
		//FRotator RotateDarkWisp = UKismetMathLibrary::FindLookAtRotation(LightWispLoc, DarkWispLoc);

		// Rotate the launch vector by the rotation
		FVector LightWispLaunchImpulse = FRotator(RotateLightWisp).RotateVector(LaunchImpulse);
		FVector DarkWispLaunchImpulse = FRotator(RotateDarkWisp).RotateVector(LaunchImpulse);

		LightWispMesh->AddImpulse(LightWispLaunchImpulse, NAME_None, true);
		DarkWispMesh->AddImpulse(DarkWispLaunchImpulse, NAME_None, true);
	}
	else
	{
		// Set World Location Of Light Wisp Depending on Inputs.
		FVector LightLocalMove = FVector();
		LightLocalMove.X = (CurrentLightForwardSpeed * MovementSpeed) * DeltaSeconds;
		LightLocalMove.Y = (CurrentLightRightSpeed * MovementSpeed) * DeltaSeconds;
		LightWispMesh->SetWorldLocation(LightLocalMove, true);

		FVector DarkLocalMove = FVector();
		DarkLocalMove.X = (CurrentDarkForwardSpeed * MovementSpeed) * DeltaSeconds;
		DarkLocalMove.Y = (CurrentDarkRightSpeed * MovementSpeed) * DeltaSeconds;
		DarkWispMesh->SetWorldLocation(DarkLocalMove, true);
	}

	// Move Camera To Correlate to new World Positions.
	float NewCameraHeight = FMath::Clamp(DistanceBetweenWisps(), CameraMinHeight, CameraMaxHeight);
	FVector AddCamLoc = FVector(0.0f, 0.0f, NewCameraHeight);
		
	FVector NewCamLocation = MidpointBetweenWisps() + AddCamLoc;

	TopDownCamera->SetWorldLocation(FVector(NewCamLocation), true);
}

void AWispPawn::SetupPlayerInputComponent(class UInputComponent* InputComponent)
{
	check(InputComponent);

	// Fine Up and Right Axes for Light Wisp.
	InputComponent->BindAxis("LightMoveForward", this, &AWispPawn::LightWispForward);
	InputComponent->BindAxis("LightMoveRight", this, &AWispPawn::LightWispRight);

	// Find input for dark wisp.
	InputComponent->BindAxis("DarkMoveForward", this, &AWispPawn::DarkWispForward);
	InputComponent->BindAxis("DarkMoveRight", this, &AWispPawn::DarkWispRight);
}


void AWispPawn::LightWispForward(float val)
{

	CurrentLightForwardSpeed = val;
}

void AWispPawn::LightWispRight(float val)
{
	CurrentLightRightSpeed = val;
}

void AWispPawn::DarkWispForward(float val)
{
	CurrentDarkForwardSpeed = val;
}

void AWispPawn::DarkWispRight(float val)
{
	CurrentDarkRightSpeed = val;
}

I’ve setup my inputs in the config file properly, but for whatever reason this won’t work :confused: