allow rotations only when right mouse button is held

Source/RWTHVRToolkit/Private/Pawn/VirtualRealityPawn.cpp

@@ -63,6 +63,30 @@ void AVirtualRealityPawn::SetupPlayerInputComponent(UInputComponent* PlayerInput
 	// function bindings for grabbing and releasing
 	PlayerInputComponent->BindAction("Fire", IE_Pressed, this, &AVirtualRealityPawn::OnBeginFire);
 	PlayerInputComponent->BindAction("Fire", IE_Released, this, &AVirtualRealityPawn::OnEndFire);
+
+	// bind functions for desktop rotations only on holding down right mouse
+	if (UVirtualRealityUtilities::IsDesktopMode())
+	{
+		APlayerController* PC = Cast<APlayerController>(GetController());
+		if (PC)
+		{
+			PC->bShowMouseCursor = true; 
+			PC->bEnableClickEvents = true; 
+			PC->bEnableMouseOverEvents = true;
+		}
+		PlayerInputComponent->BindAction("EnableDesktopRotation", IE_Pressed, this, &AVirtualRealityPawn::StartDesktopRotation);
+		PlayerInputComponent->BindAction("EnableDesktopRotation", IE_Released, this, &AVirtualRealityPawn::EndDesktopRotation);
+	}
+}
+
+void AVirtualRealityPawn::StartDesktopRotation()
+{
+	bApplyDesktopRotation = true;
+}
+
+void AVirtualRealityPawn::EndDesktopRotation()
+{
+	bApplyDesktopRotation = false;
 }
 
 void AVirtualRealityPawn::SetCameraOffset() const
@@ -102,7 +126,7 @@ void AVirtualRealityPawn::OnUp_Implementation(float Value)
 void AVirtualRealityPawn::OnTurnRate_Implementation(float Rate)
 {
 	/* Turning the user externally will make them sick */
-	if (UVirtualRealityUtilities::IsDesktopMode())
+	if (UVirtualRealityUtilities::IsDesktopMode() && bApplyDesktopRotation)
 	{
 		AddControllerYawInput(Rate * BaseTurnRate * GetWorld()->GetDeltaSeconds() * CustomTimeDilation);
 	}
@@ -111,7 +135,7 @@ void AVirtualRealityPawn::OnTurnRate_Implementation(float Rate)
 void AVirtualRealityPawn::OnLookUpRate_Implementation(float Rate)
 {
 	/* Turning the user externally will make them sick */
-	if (UVirtualRealityUtilities::IsDesktopMode())
+	if (UVirtualRealityUtilities::IsDesktopMode() && bApplyDesktopRotation)
 	{
 		AddControllerPitchInput(Rate * BaseTurnRate * GetWorld()->GetDeltaSeconds() * CustomTimeDilation);
 		SetCameraOffset();

Source/RWTHVRToolkit/Public/Pawn/VirtualRealityPawn.h

@@ -48,5 +48,11 @@ protected:
 	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "Pawn|Interaction") void OnBeginFire(); 
 	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "Pawn|Interaction") void OnEndFire();
 
+	/*Desktop Testing*/
+	// the idea is that you have to hold the right mouse button to do rotations
+	UFUNCTION() void StartDesktopRotation();
+	UFUNCTION() void EndDesktopRotation();
+	bool bApplyDesktopRotation = false;
+
 	void SetCameraOffset() const;
 };