Added ability to swap renderers

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

apps/wolf_3d_gui/lib/screens/difficulty_screen.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:wolf_3d_data_types/wolf_3d_data_types.dart';
 import 'package:wolf_3d_flutter/wolf_3d.dart';
-import 'package:wolf_3d_renderer/wolf_3d_flutter_renderer.dart';
+import 'package:wolf_3d_gui/screens/game_screen.dart';
 
 class DifficultyScreen extends StatefulWidget {
   const DifficultyScreen({
@@ -26,12 +26,18 @@ class _DifficultyScreenState extends State<DifficultyScreen> {
 
     Navigator.of(context).pushReplacement(
       MaterialPageRoute(
-        builder: (_) => WolfFlutterRenderer(
-          Wolf3d.I.activeGame,
+        builder: (context) => GameScreen(
+          data: Wolf3d.I.activeGame,
           difficulty: difficulty,
           startingEpisode: Wolf3d.I.activeEpisode,
           audio: Wolf3d.I.audio,
         ),
+        // builder: (_) => WolfFlutterRenderer(
+        //   Wolf3d.I.activeGame,
+        //   difficulty: difficulty,
+        //   startingEpisode: Wolf3d.I.activeEpisode,
+        //   audio: Wolf3d.I.audio,
+        // ),
       ),
     );
   }

apps/wolf_3d_gui/lib/screens/game_screen.dart

@@ -0,0 +1,97 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:wolf_3d_data_types/wolf_3d_data_types.dart';
+import 'package:wolf_3d_engine/wolf_3d_engine.dart';
+import 'package:wolf_3d_flutter/wolf_3d_input_flutter.dart';
+import 'package:wolf_3d_input/wolf_3d_input.dart';
+import 'package:wolf_3d_renderer/wolf_3d_ascii_renderer.dart';
+import 'package:wolf_3d_renderer/wolf_3d_flutter_renderer.dart';
+
+class GameScreen extends StatefulWidget {
+  final WolfensteinData data;
+  final Difficulty difficulty;
+  final int startingEpisode;
+  final EngineAudio audio;
+
+  const GameScreen({
+    required this.data,
+    required this.difficulty,
+    required this.startingEpisode,
+    required this.audio,
+    super.key,
+  });
+
+  @override
+  State<GameScreen> createState() => _GameScreenState();
+}
+
+class _GameScreenState extends State<GameScreen> {
+  late final WolfEngine _engine;
+  final Wolf3dInput _inputManager = Wolf3dFlutterInput();
+  bool _useAsciiMode = false;
+
+  @override
+  void initState() {
+    super.initState();
+
+    // The Host Screen owns the engine lifecycle
+    _engine = WolfEngine(
+      data: widget.data,
+      difficulty: widget.difficulty,
+      startingEpisode: widget.startingEpisode,
+      audio: widget.audio,
+      onGameWon: () => Navigator.of(context).pop(),
+    );
+
+    _engine.init();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: Stack(
+        children: [
+          // Render the active view
+          _useAsciiMode
+              ? WolfAsciiRenderer(
+                  engine: _engine,
+                  inputManager: _inputManager,
+                )
+              : WolfFlutterRenderer(
+                  engine: _engine,
+                  inputManager: _inputManager,
+                ),
+
+          // Invisible listener to trap the 'Tab' key and swap renderers
+          Focus(
+            autofocus: false,
+            onKeyEvent: (node, event) {
+              if (event is KeyDownEvent &&
+                  event.logicalKey == LogicalKeyboardKey.tab) {
+                setState(() {
+                  _useAsciiMode = !_useAsciiMode;
+                });
+                return KeyEventResult.handled;
+              }
+              return KeyEventResult.ignored;
+            },
+            child: const SizedBox.shrink(),
+          ),
+
+          // Optional: A little UI hint
+          Positioned(
+            top: 16,
+            right: 16,
+            child: Text(
+              'Press TAB to swap renderers',
+              style: TextStyle(
+                color: Colors.white.withValues(alpha: 0.5),
+                fontSize: 12,
+              ),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}

packages/wolf_3d_renderer/lib/base_renderer.dart

@@ -0,0 +1,72 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/scheduler.dart';
+import 'package:wolf_3d_engine/wolf_3d_engine.dart';
+import 'package:wolf_3d_input/wolf_3d_input.dart';
+
+// 1. The widget now only requires the engine!
+abstract class BaseWolfRenderer extends StatefulWidget {
+  final WolfEngine engine;
+  final Wolf3dInput inputManager;
+
+  const BaseWolfRenderer({
+    required this.engine,
+    required this.inputManager,
+    super.key,
+  });
+}
+
+abstract class BaseWolfRendererState<T extends BaseWolfRenderer>
+    extends State<T>
+    with SingleTickerProviderStateMixin {
+  late final Ticker gameLoop;
+  final FocusNode focusNode = FocusNode();
+
+  Duration _lastTick = Duration.zero;
+
+  @override
+  void initState() {
+    super.initState();
+    // DO NOT initialize the engine here. Just start the loop!
+    gameLoop = createTicker(_tick)..start();
+    focusNode.requestFocus();
+  }
+
+  void _tick(Duration elapsed) {
+    if (!widget.engine.isInitialized) return;
+
+    Duration delta = elapsed - _lastTick;
+    _lastTick = elapsed;
+
+    widget.inputManager.update();
+    // Tick the shared engine
+    widget.engine.tick(delta, widget.inputManager.currentInput);
+
+    performRender();
+  }
+
+  @override
+  void dispose() {
+    gameLoop.dispose();
+    focusNode.dispose();
+    super.dispose();
+  }
+
+  void performRender();
+  Widget buildViewport(BuildContext context);
+  Color get scaffoldColor;
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      backgroundColor: scaffoldColor,
+      body: KeyboardListener(
+        focusNode: focusNode,
+        autofocus: true,
+        onKeyEvent: (_) {},
+        child: Center(
+          child: buildViewport(context),
+        ),
+      ),
+    );
+  }
+}

packages/wolf_3d_renderer/lib/wolf_3d_ascii_renderer.dart

@@ -4,21 +4,15 @@ import 'package:wolf_3d_data_types/wolf_3d_data_types.dart';
 import 'package:wolf_3d_engine/wolf_3d_engine.dart';
 import 'package:wolf_3d_flutter/wolf_3d_input_flutter.dart';
 import 'package:wolf_3d_input/wolf_3d_input.dart';
+import 'package:wolf_3d_renderer/base_renderer.dart';
 
-class WolfAsciiRenderer extends StatefulWidget {
-  const WolfAsciiRenderer(
-    this.data, {
-    required this.difficulty,
-    required this.startingEpisode,
-    required this.audio,
+class WolfAsciiRenderer extends BaseWolfRenderer {
+  const WolfAsciiRenderer({
+    required super.engine,
+    required super.inputManager,
     super.key,
   });
 
-  final WolfensteinData data;
-  final Difficulty difficulty;
-  final int startingEpisode;
-  final EngineAudio audio;
-
   @override
   State<WolfAsciiRenderer> createState() => _WolfAsciiRendererState();
 }
@@ -41,10 +35,10 @@ class _WolfAsciiRendererState extends State<WolfAsciiRenderer>
     super.initState();
 
     engine = WolfEngine(
-      data: widget.data,
-      difficulty: widget.difficulty,
-      startingEpisode: widget.startingEpisode,
-      audio: widget.audio,
+      data: widget.engine.data,
+      difficulty: widget.engine.difficulty,
+      startingEpisode: widget.engine.startingEpisode,
+      audio: widget.engine.audio,
       onGameWon: () {
         Navigator.of(context).pop();
       },
@@ -86,7 +80,7 @@ class _WolfAsciiRendererState extends State<WolfAsciiRenderer>
     }
 
     return Scaffold(
-      backgroundColor: Colors.black,
+      backgroundColor: Color.fromARGB(255, 4, 64, 64),
       body: KeyboardListener(
         focusNode: _focusNode,
         autofocus: true,

packages/wolf_3d_renderer/lib/wolf_3d_flutter_renderer.dart

@@ -6,21 +6,15 @@ import 'package:wolf_3d_data_types/wolf_3d_data_types.dart';
 import 'package:wolf_3d_engine/wolf_3d_engine.dart';
 import 'package:wolf_3d_flutter/wolf_3d_input_flutter.dart';
 import 'package:wolf_3d_input/wolf_3d_input.dart';
+import 'package:wolf_3d_renderer/base_renderer.dart';
 
-class WolfFlutterRenderer extends StatefulWidget {
-  const WolfFlutterRenderer(
-    this.data, {
-    required this.difficulty,
-    required this.startingEpisode,
-    required this.audio,
+class WolfFlutterRenderer extends BaseWolfRenderer {
+  const WolfFlutterRenderer({
+    required super.engine,
+    required super.inputManager,
     super.key,
   });
 
-  final WolfensteinData data;
-  final Difficulty difficulty;
-  final int startingEpisode;
-  final EngineAudio audio;
-
   @override
   State<WolfFlutterRenderer> createState() => _WolfFlutterRendererState();
 }
@@ -47,10 +41,10 @@ class _WolfFlutterRendererState extends State<WolfFlutterRenderer>
     super.initState();
 
     engine = WolfEngine(
-      data: widget.data,
-      difficulty: widget.difficulty,
-      startingEpisode: widget.startingEpisode,
-      audio: widget.audio,
+      data: widget.engine.data,
+      difficulty: widget.engine.difficulty,
+      startingEpisode: widget.engine.startingEpisode,
+      audio: widget.engine.audio,
       onGameWon: () {
         Navigator.of(context).pop();
       },