Implement Line Trace through Crosshairs

Source/Integration/IntegrationGameModeBase.h

@@ -46,7 +46,16 @@ public:
 	int64 GetPlayerId();
 
 	UFUNCTION(BlueprintCallable, Category = "Luprex")
-	void SetLookAtDetector(UlxLookAtActorBase *det);
+	void SetLookAt(AActor *actor) { CurrentLookAt = actor; }
+
+	UFUNCTION(BlueprintCallable, Category = "Luprex")
+	AActor *GetLookAt() const { return CurrentLookAt; }
+
+	UFUNCTION(BlueprintCallable, Category = "Luprex")
+	bool LookAtChanged() const { return CurrentLookAt != PreviousLookAt; }
+
+	UFUNCTION(BlueprintImplementableEvent, Category = "Luprex")
+	void CalculateLookAt(AActor *Player, APlayerController *PlayerController, APlayerCameraManager *Camera);
 
 	// Assemble a lua call. To call into lua:
 	//
@@ -81,6 +90,10 @@ public:
 	// Maybe call 'BecomePossessed' on the player tangible.
 	void UpdatePossessedTangible();
 
+	// Call 'CalculateLookAt', but only if everything is valid.
+	// It is up to the blueprint code to actually determine what we're looking at.
+	void UpdateLookAt();
+
 	// Pre-tick and post-tick functions.
 	void OnWorldPreActorTick(UWorld* InWorld, ELevelTick InLevelTick, float InDeltaSeconds);
 	void OnWorldPostActorTick(UWorld* InWorld, ELevelTick InLevelTick, float InDeltaSeconds);
@@ -97,8 +110,13 @@ public:
 	UPROPERTY()
 	UlxTangibleManager *TangibleManager;
 
+	// The actor that the player is looking at, previous frame.
 	UPROPERTY()
-	UlxLookAtActorBase *LookAtDetector;
+	AActor *PreviousLookAt;
+
+	// The actor that the player is looking at, current frame.
+	UPROPERTY()
+	AActor *CurrentLookAt;
 
 	// This stores the entire text currently visible in the console.
 	FlxConsoleOutput ConsoleOutput;