NoteTile create

SimpleGame/src/Include/NotePlaceEnum.hpp

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+enum NotePlaceEnum { Left, Middle, Right };

SimpleGame/src/Include/NoteTile.hpp

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+#include <NotePlaceEnum.hpp>
+#include <SFML/Graphics/StencilMode.hpp>
+#include <SFML/System/Vector2.hpp>
+#include <memory>
+#include <vector>
+
+class NoteTile {
+private:
+  static std::vector<std::unique_ptr<NoteTile>> existing_tiles;
+  // logic things
+  float play_time;
+  float good_interval;
+  NotePlaceEnum place;
+  // used for Graphics
+  sf::Vector2f position;
+  // probably some tileSprite class here in the future <-
+
+  // Constructor private, use create to create
+  NoteTile(float play_time, float good_interval, NotePlaceEnum place);
+
+public:
+  // Good key press for this note, is if player press good place, within
+  // [play_time - good_interval/2, play_time + good_interval/2]
+  static void create(float play_time, float good_interval, NotePlaceEnum place);
+  // Should be called when one of arrows key pressed, return True if it's a good
+  // press
+  bool CheckPress(float press_time, NotePlaceEnum key_pressed);
+};

SimpleGame/src/Source/NoteTile.cpp

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+#include "NoteTile.hpp"
+
+std::vector<std::unique_ptr<NoteTile>> NoteTile::existing_tiles;
+
+// private
+NoteTile::NoteTile(float play_time, float good_interval, NotePlaceEnum place)
+    : play_time(play_time), good_interval(good_interval), place(place) {
+  NoteTile::existing_tiles.push_back(std::unique_ptr<NoteTile>(this));
+}
+
+// public
+void NoteTile::create(float play_time, float good_interval,
+                      NotePlaceEnum place) {
+  NoteTile(play_time, good_interval, place);
+}
+
+bool NoteTile::CheckPress(float press_time, NotePlaceEnum) {
+  for (const auto &note_tile : NoteTile::existing_tiles) {
+    if (note_tile->play_time - note_tile->good_interval / 2 < press_time &&
+        note_tile->play_time + note_tile->good_interval / 2 > press_time) {
+      return true;
+    }
+  }
+  return false;
+}