How to Capture Mouse Movement

Development Programming & Scripting
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1

In my combat system, I want to determine the direction in which the character should attack by the movement of the mouse after the player clicks the melee button. I have the framework for this setup, but I cannot get the mouse location properly. Currently, I have two fvector2ds, the center of screen and mouse location. To calculate the center of the screen, I have the following:

FIntPoint ViewportSize;
UGameplayStatics::GetPlayerController(this, 0)->GetViewportSize(ViewportSize.X, ViewportSize.Y);
UE_LOG(LogTemp, Warning, TEXT(“Viewport Size: (%f, %f)”), ViewportSize.X, ViewportSize.Y);
CenterOfScreen = FVector2D(ViewportSize.X, ViewportSize.Y);

To calculate the mouse:

if (PlayerController)
{
	//PlayerController->GetInputMouseDelta(DeltaMouseLoc.X, DeltaMouseLoc.Y);
	PlayerController->GetMousePosition(DeltaMouseLoc.X, DeltaMouseLoc.Y);
}
MouseLocation = DeltaMouseLoc;

In my HUD class, I draw a 2d line from the center of the screen to the mouse location, but it does not work, it starts from a random point somewhat near the center, then goes off screen.

I have another FVector2D, it is the “Attack Mouse Position” (poor name), and it is the result of MouseLocation - CenterOfScreen. This should, in theory, give a vector that goes from the center of the screen to the mouse location. This does not work. What I am aiming for is that while the player is clicking the left mouse button, the game starts to capture the mouse’s location relative to the center of the screen. From that, I can determine which direction to attack in. Is there another way to determine the mouse’s location?

2

Ive done what youre trying to do in my game, but my approach is different.

I use GetHitResultUnderCursor to get the location of my mouse cursor, then instead of using the center of the screen to get direction, i compare the character location to the mouse location to get direction (For rotation you can use the UKismetMathLibrary::FindLookAtRotation)