Fixed vision blocking; MapObject::Occupy() now blueprint implementable

MapObject.h

@@ -35,6 +35,8 @@ public:
 		int32 ID;
 	UPROPERTY(BlueprintReadOnly, VisibleAnywhere, Category = "Generation")
 		class AHexTile* Origin; // very important
+	UPROPERTY(BlueprintReadOnly, VisibleAnywhere, Category = "Generation")
+		bool bPlaced;
 	UPROPERTY(BlueprintReadWrite, VisibleAnywhere, Category = "Generation")
 		TArray<FHexVector> Occupying;
 
@@ -54,6 +56,7 @@ public:
 	// Called every frame
 	virtual void Tick(float DeltaTime) override;
 
+	UFUNCTION(BlueprintImplementableEvent)
 	void Occupy();
 
 };