refactor castle

src/Castle.h

@@ -1,14 +1,14 @@
 #pragma once
-#include "Entity.h"
+#include <string>
+#include <vector>
 
-class Castle : public Entity {
+class Castle {
 private:
-  static const std::vector<std::string> image;
-  static const std::vector<std::string> mask;
+  const size_t x, y;
+  const std::vector<std::string> image;
+  const std::vector<std::string> mask;
 
 public:
   Castle();
-
-  void draw();
-  void update();
+  void draw() const;
 };