Implement camera perspective toggle

Source/AgrarianGame/AgrarianGameCharacter.h

@@ -73,10 +73,26 @@ protected:
 	UPROPERTY(EditAnywhere, Category="Input")
 	UInputAction* InteractAction;
 
+	/** Toggle between third-person and first-person camera views. */
+	UPROPERTY(EditAnywhere, Category="Input")
+	UInputAction* ToggleCameraAction;
+
 	/** How far the player can interact with MVP objects. */
 	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category="Agrarian|Interaction", meta = (ClampMin = "100"))
 	float InteractionDistance = 450.0f;
 
+	/** Third-person spring arm distance used when returning from first person. */
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category="Agrarian|Camera", meta = (ClampMin = "0"))
+	float ThirdPersonCameraDistance = 400.0f;
+
+	/** Local first-person camera offset relative to the capsule root. */
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category="Agrarian|Camera")
+	FVector FirstPersonCameraOffset = FVector(0.0f, 0.0f, 72.0f);
+
+	/** True when this local character is using the optional first-person view. */
+	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category="Agrarian|Camera", meta = (AllowPrivateAccess = "true"))
+	bool bFirstPersonCamera = false;
+
 public:
 
 	/** Constructor */
@@ -98,6 +114,12 @@ protected:
 	/** Called for interaction input */
 	void Interact();
 
+	/** Called for camera perspective toggle input */
+	void ToggleCameraPerspective();
+
+	/** Applies local camera presentation state. */
+	void SetFirstPersonCamera(bool bEnableFirstPerson);
+
 public:
 
 	/** Handles move inputs from either controls or UI interfaces */
@@ -120,6 +142,10 @@ public:
 	UFUNCTION(BlueprintCallable, Category="Agrarian|Interaction")
 	virtual void TryInteract();
 
+	/** Returns true when this local character is using first-person camera presentation. */
+	UFUNCTION(BlueprintPure, Category="Agrarian|Camera")
+	bool IsFirstPersonCamera() const { return bFirstPersonCamera; }
+
 	/** Server-authoritative interaction entry point. */
 	UFUNCTION(Server, Reliable)
 	void ServerInteract(AActor* TargetActor);
@@ -144,4 +170,3 @@ public:
 	/** Returns BuildingPlacementComponent subobject **/
 	FORCEINLINE UAgrarianBuildingPlacementComponent* GetBuildingPlacementComponent() const { return BuildingPlacementComponent; }
 };
-