Chapter 22: Snake Game Mechanics and Chapter 23: Completing the Game

articles/toc.yml

@@ -154,6 +154,10 @@
           href: tutorials/building_2d_games/20_implementing_ui_with_gum/
         - name: "21: Customizing Gum UI"
           href: tutorials/building_2d_games/21_customizing_gum_ui/
+        - name: "22: Snake Game Mechanics"
+          href: tutorials/building_2d_games/22_snake_game_mechanics/
+        - name: "23: Completing the Game"
+          href: tutorials/building_2d_games/23_completing_the_game/
 - name: Console Access
   href: console_access.md
 - name: Help and Support

articles/tutorials/building_2d_games/10_handling_input/snippets/inputbuffer.cs

@@ -0,0 +1,40 @@
+// Use a queue directly for input buffering
+private Queue<Vector2> _inputBuffer;
+private const int MAX_BUFFER_SIZE = 2;
+
+// In initialization code:
+_inputBuffer = new Queue<Vector2>(MAX_BUFFER_SIZE);
+
+// In the input handling code:
+KeyboardState keyboard = Keyboard.GetState();
+Vector2 newDirection = Vector2.Zero;
+
+if(keyboard.IsKeyDown(Keys.Up))
+{
+    newDirection = -Vector2.UnitY;
+}
+else if(keyboard.IsKeyDown(Keys.Down))
+{
+    newDirection = Vector2.UnitY;
+}
+else if(keyboard.IsKeyDown(Keys.Left))
+{
+    newDirection = -Vector2.UnitX;
+}
+else if(keyboard.IsKeyDown(Keys.Right))
+{
+    newDirection = Vector2.UnitX;
+}
+
+// Only add if a valid direction and does not exceed the buffer size
+if(newDirection != Vector2.Zero && _inputBuffer.Count < MAX_BUFFER_SIZE)
+{
+    _inputBuffer.Enqueue(newDirection);
+}
+
+// In movement update code
+if(_inputBuffer.COunt > 0)
+{
+    Vector2 nextDirection = _inputBuffer.Dequeue();
+    _position += nextDirection * _speed;
+}