feat: Implement ASCII theme cycling and add quadrant theme support

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

apps/wolf_3d_cli/lib/cli_game_loop.dart

@@ -125,9 +125,36 @@ class CliGameLoop {
       return;
     }
 
+    if (bytes.contains(116) || bytes.contains(84)) {
+      _cycleAsciiTheme();
+      return;
+    }
+
     input.handleKey(bytes);
   }
 
+  void _cycleAsciiTheme() {
+    final List<AsciiRenderer> asciiRenderers = <AsciiRenderer>[
+      if (primaryRenderer is AsciiRenderer) primaryRenderer as AsciiRenderer,
+      if (secondaryRenderer is AsciiRenderer)
+        secondaryRenderer as AsciiRenderer,
+    ];
+    if (asciiRenderers.isEmpty) {
+      return;
+    }
+
+    final AsciiTheme nextTheme = AsciiThemes.nextOf(
+      asciiRenderers.first.activeTheme,
+    );
+    for (final renderer in asciiRenderers) {
+      renderer.activeTheme = nextTheme;
+    }
+
+    if (stdout.hasTerminal) {
+      stdout.write('\x1b[2J\x1b[H');
+    }
+  }
+
   void _tick(Timer timer) {
     if (!_isRunning) {
       return;

apps/wolf_3d_gui/lib/screens/game_screen.dart

@@ -4,6 +4,7 @@ library;
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:wolf_3d_dart/wolf_3d_engine.dart';
+import 'package:wolf_3d_dart/wolf_3d_renderer.dart';
 import 'package:wolf_3d_flutter/wolf_3d_flutter.dart';
 import 'package:wolf_3d_renderer/wolf_3d_ascii_renderer.dart';
 import 'package:wolf_3d_renderer/wolf_3d_flutter_renderer.dart';
@@ -33,6 +34,7 @@ class GameScreen extends StatefulWidget {
 class _GameScreenState extends State<GameScreen> {
   late final WolfEngine _engine;
   _RendererMode _rendererMode = _RendererMode.software;
+  AsciiTheme _asciiTheme = AsciiThemes.blocks;
 
   @override
   void initState() {
@@ -104,7 +106,7 @@ class _GameScreenState extends State<GameScreen> {
                     top: 16,
                     right: 16,
                     child: Text(
-                      'TAB: ${_modeLabel(_rendererMode)}   `: FPS ${_engine.showFpsCounter ? 'On' : 'Off'}',
+                      'TAB: ${_modeLabel(_rendererMode)}   T: ${_asciiTheme.name}   `: FPS ${_engine.showFpsCounter ? 'On' : 'Off'}',
                       style: TextStyle(
                         color: Colors.white.withValues(alpha: 0.5),
                       ),
@@ -131,6 +133,7 @@ class _GameScreenState extends State<GameScreen> {
       case _RendererMode.ascii:
         return WolfAsciiRenderer(
           engine: _engine,
+          theme: _asciiTheme,
           onKeyEvent: _handleRendererKeyEvent,
         );
       case _RendererMode.glsl:
@@ -155,6 +158,13 @@ class _GameScreenState extends State<GameScreen> {
     if (event.logicalKey == LogicalKeyboardKey.backquote ||
         event.character == '`') {
       setState(_toggleFpsCounter);
+      return;
+    }
+
+    if (event.logicalKey == LogicalKeyboardKey.keyT ||
+        event.character == 't' ||
+        event.character == 'T') {
+      setState(_cycleAsciiTheme);
     }
   }
 
@@ -185,6 +195,10 @@ class _GameScreenState extends State<GameScreen> {
     _engine.showFpsCounter = !_engine.showFpsCounter;
   }
 
+  void _cycleAsciiTheme() {
+    _asciiTheme = AsciiThemes.nextOf(_asciiTheme);
+  }
+
   String _modeLabel(_RendererMode mode) {
     switch (mode) {
       case _RendererMode.software: