Edge scrolling camera issue

Development Cinematics & Media
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1

Hi everyone, I’m working on a litte game with an RTS like camera, the camera is working, but I have some issue with the edge scrolling

here is my issue :
The only edge scrolling that I have is “Top Left”, no matter which side the mouse is, the camera is scrolling to Top Left

first of all I have a Pawn for a the camera, and an Arm sping attach to an invisible sphere

And I’m detecting the edge scrolling in the Player controller :

void ABTD_PlayerController::PlayerTick(float DeltaTime)
{
	Super::PlayerTick(DeltaTime);

	HandleEdgeScrolling();
}

void ABTD_PlayerController::HandleEdgeScrolling()
{
	float MouseX = 0.0f;
	float MouseY = 0.0f;

	if (GetMousePosition(MouseX, MouseY))
		return;

	int32 SizeX = 0;
	int32 SizeY = 0;

	GetViewportSize(SizeX, SizeY);

	if (MouseX < EdgeScrollingSensitivity) //Mouse is Close to Left
		OnCameraRight(-1);
	else if (MouseX > SizeX - EdgeScrollingSensitivity) //Mouse is Close to Right
		OnCameraRight(1);

	if (MouseY < EdgeScrollingSensitivity) //Mouse is Close to Top
		OnCameraForward(1);
	else if (MouseY > SizeY - EdgeScrollingSensitivity) //Mouse is Close to Bottom
		OnCameraForward(-1);
}

void ABTD_PlayerController::OnCameraForward(float Axis)
{
	ABTD_PlayerPawn* const MyPawn = Cast<ABTD_PlayerPawn>(GetPawn());
	if (MyPawn) 
	{
		FVector NewDeltaLocation = MyPawn->PawnBaseCollsion->GetForwardVector() * (CameraMovementSpeed * Axis);
		MyPawn->AddActorWorldOffset(NewDeltaLocation);
	}
}

void ABTD_PlayerController::OnCameraRight(float Axis)
{
	ABTD_PlayerPawn* const MyPawn = Cast<ABTD_PlayerPawn>(GetPawn());
	if (MyPawn)
	{
		FVector NewDeltaLocation = MyPawn->PawnBaseCollsion->GetRightVector() * (CameraMovementSpeed * Axis);
		MyPawn->AddActorWorldOffset(NewDeltaLocation);
	}
}

Any Idea what I’m doing wrong here ?

2

Hello Talus,

I see at least one thing that looks wrong :

if (GetMousePosition(MouseX, MouseY)) return;

Shouldn’t it be :

if (!GetMousePosition(MouseX, MouseY)) return;

Because ‘GetMousePosition’ returns true when it was able to acquire the mouse position.

Cheers

3

Thx, It’s working a lot better :slight_smile: