Improve rendering

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

lib/features/input/input_manager.dart

@@ -0,0 +1,59 @@
+import 'package:flutter/services.dart';
+
+class InputManager {
+  Set<LogicalKeyboardKey> _previousKeys = {};
+
+  bool isMovingForward = false;
+  bool isMovingBackward = false;
+  bool isTurningLeft = false;
+  bool isTurningRight = false;
+
+  // Discrete (triggers once per press)
+  bool isInteracting = false;
+
+  // Continuous
+  bool isFiring = false;
+
+  int? requestedWeaponIndex;
+
+  void update() {
+    final pressedKeys = HardwareKeyboard.instance.logicalKeysPressed;
+
+    // Calculate all keys that were pressed exactly on this frame
+    final newlyPressedKeys = pressedKeys.difference(_previousKeys);
+
+    // * Movement
+    isMovingForward = pressedKeys.contains(LogicalKeyboardKey.keyW);
+    isMovingBackward = pressedKeys.contains(LogicalKeyboardKey.keyS);
+    isTurningLeft = pressedKeys.contains(LogicalKeyboardKey.keyA);
+    isTurningRight = pressedKeys.contains(LogicalKeyboardKey.keyD);
+
+    // * Interaction (Space)
+    // Much simpler now using the newlyPressedKeys set
+    isInteracting = newlyPressedKeys.contains(LogicalKeyboardKey.space);
+
+    // * Firing (Left Control)
+    // - Keeping this continuous for machine guns
+    isFiring =
+        pressedKeys.contains(LogicalKeyboardKey.controlLeft) &&
+        !pressedKeys.contains(LogicalKeyboardKey.space);
+
+    // * Manual Weapon Switching
+    requestedWeaponIndex = null;
+
+    // Iterate through newly pressed keys and switch on them
+    for (final LogicalKeyboardKey key in newlyPressedKeys) {
+      switch (key) {
+        case LogicalKeyboardKey.digit1:
+          requestedWeaponIndex = 0; // Knife
+        case LogicalKeyboardKey.digit2:
+          requestedWeaponIndex = 1; // Pistol
+        case LogicalKeyboardKey.digit3:
+          requestedWeaponIndex = 2; // Machine Gun
+      }
+    }
+
+    // * Save state for next tick
+    _previousKeys = Set.from(pressedKeys);
+  }
+}