diagonal edge scroll improvements

AdventureCameraPawn.cpp

@@ -19,8 +19,8 @@ AAdventureCameraPawn::AAdventureCameraPawn()
 	PrimaryActorTick.bCanEverTick = true;
 
 	ESASize = .01;
-	BaseScrollSpeed = 15;
+	BaseScrollSpeed = 16;
-	ScrollAccelleration = BaseScrollSpeed * 2;
+	ScrollAccelleration = BaseScrollSpeed * 2.2;
 
 	ESAMaxBoundSlope = 1 / (1 - (1-ESASize));
 	ESAMaxBoundIntercept = 1 - ESAMaxBoundSlope;
@@ -36,9 +36,16 @@ void AAdventureCameraPawn::BeginPlay()
 	Super::BeginPlay();
 	ControllerRef = (AAdventurePlayerController*)UGameplayStatics::GetPlayerController(GetWorld(), 0);
 
+	// The Viewport properties are inaccurate right after BeginPlay, so we need to wait a short time before saving them here.
+	FTimerHandle UnusedHandle;
+	GetWorldTimerManager().SetTimer(
+		UnusedHandle, this, &AAdventureCameraPawn::GetTheDamnViewport, 1.5, false);
+}
+
+void AAdventureCameraPawn::GetTheDamnViewport()
+{
 	Viewport = GetWorld()->GetGameViewport();
 	ViewSize = Viewport->Viewport->GetSizeXY();
-
 }
 
 // Called every frame
@@ -66,13 +73,19 @@ void AAdventureCameraPawn::EdgeScrollSide(float AxisValue)
 	float mouseY;
 	ControllerRef->GetMousePosition(mouseX, mouseY);
 	float mousePosX = mouseX / ViewSize.X;
+	float mousePosY = mouseY / ViewSize.Y;
 	float VertAccelleration = GetInputAxisValue("Mouse Y") * (ScrollAccelleration * .75);
 
 	if (mousePosX <= ESASize) // if in LEFT area
 	{
 		////// Scroll LEFT with Vert Accelleration
 		float SpeedX = (mousePosX * ESAMinBoundSlope + ESAMinBoundIntercept) * BaseScrollSpeed;
-		AddActorLocalOffset(FVector(VertAccelleration, -SpeedX, 0));
+		AddActorLocalOffset(FVector(0, -SpeedX, 0));
+
+		if (mousePosY > .005) // if not touching EDGE
+		{
+			AddActorLocalOffset(FVector(VertAccelleration, 0, 0));
+		}
 
 		if (AxisValue < .0 && mousePosX <= .005) // if mouse moving LEFT and touching EDGE
 		{
@@ -84,9 +97,14 @@ void AAdventureCameraPawn::EdgeScrollSide(float AxisValue)
 
 	if (mousePosX >= 1-ESASize) // if in RIGHT area
 	{
-		////// Scroll RIGHT
+		////// Scroll RIGHT with Vert Accelleration
 		float SpeedX = (mousePosX * ESAMaxBoundSlope + ESAMaxBoundIntercept) * BaseScrollSpeed;
-		AddActorLocalOffset(FVector(VertAccelleration, SpeedX, 0));
+		AddActorLocalOffset(FVector(0, SpeedX, 0));
+
+		if (mousePosY < .995) // if not touching EDGE
+		{
+			AddActorLocalOffset(FVector(VertAccelleration, 0, 0));
+		}
 
 		if (AxisValue > .0 && mousePosX >= .995) // if mouse moving RIGHT and touching EDGE
 		{
@@ -103,14 +121,20 @@ void AAdventureCameraPawn::EdgeScrollVert(float AxisValue)
 	float mouseY;
 	ControllerRef->GetMousePosition(mouseX, mouseY);
 	float mousePosY = mouseY / ViewSize.Y;
+	float mousePosX = mouseX / ViewSize.X;
 	float SideAccelleration = GetInputAxisValue("Mouse X") * (ScrollAccelleration * .75);
 
 	if (mousePosY <= ESASize) // if in TOP area
 	{
-		////// Scroll TOP
+		////// Scroll TOP with Side Accelleration
 		float SpeedY = (mousePosY * ESAMinBoundSlope + ESAMinBoundIntercept) * BaseScrollSpeed;
 		AddActorLocalOffset(FVector(SpeedY, SideAccelleration, 0));
 
+		if (mousePosX > .005) // if not touching EDGE
+		{
+			AddActorLocalOffset(FVector(0, SideAccelleration, 0));
+		}
+
 		if (AxisValue > .0 && mousePosY <= .005) // if mouse moving TOP and touching EDGE
 		{
 			////// Add TOP accelleration
@@ -121,10 +145,15 @@ void AAdventureCameraPawn::EdgeScrollVert(float AxisValue)
 
 	if (mousePosY >= 1-ESASize) // if in BOTTOM area
 	{
-		////// Scroll BOTTOM
+		////// Scroll BOTTOM with Side Accelleration
 		float SpeedY = (mousePosY * ESAMaxBoundSlope + ESAMaxBoundIntercept) * BaseScrollSpeed;
 		AddActorLocalOffset(FVector(-SpeedY, SideAccelleration, 0));
 
+		if (mousePosX < .995) // if not touching EDGE
+		{
+			AddActorLocalOffset(FVector(0, SideAccelleration, 0));
+		}
+
 		if (AxisValue < .0 && mousePosY >= .995) // if mouse moving BOTTOM and touching EDGE
 		{
 			////// add BOTTOM accelleration

AdventureCameraPawn.h

@@ -50,6 +50,7 @@ public:
 protected:
 	// Called when the game starts or when spawned
 	virtual void BeginPlay() override;	
+	void GetTheDamnViewport();
 
 	float ESAMaxBoundSlope;
 	float ESAMaxBoundIntercept;