fix more design

1 files changed, 3 insertions, 6 deletions

diff --git a/SetNeighborTileBehavior.h b/SetNeighborTileBehavior.h
index d316420..53bfbc0 100644
--- a/SetNeighborTileBehavior.h
+++ b/SetNeighborTileBehavior.h
@@ -3,19 +3,16 @@
 #include "TileBehavior.h"
 
 class SetNeighborTileBehavior : public TileBehavior {
+	friend class TileBehaviorFactory;
+	using TileBehavior::TileBehavior;
+
 public:
 	virtual void step(Artist *);
 	virtual void update(Tile &);
-	virtual std::unique_ptr<TileBehavior> clone(Museum &);
 
 	static constexpr const char * type = "B";
 
 private:
-	using TileBehavior::TileBehavior;
-	static SetNeighborTileBehavior instance;
-	SetNeighborTileBehavior() = default;
-
-private:
 	int dx = 0;
 	int dy = 0;
 };