tetris_engine 1.1.0

A customizable Tetris engine for Flutter applications.

tetris engine

A complete, reusable Tetris Engine package — pure Dart, no backend, no cloud dependencies. Works on Android, iOS, Web, Windows, Linux, and macOS.

ScreenShot

Features

• Full Tetris Guideline engine — 7-bag randomizer, SRS rotation, ghost piece, hold, next queue
• Scoring — line clear points, back-to-back Tetris bonus, combo multiplier, hard/soft drop
• Level & gravity — automatic speed progression
• Theme system — light, dark, and colorblind-safe themes; fully customizable
• Input — keyboard (desktop/web), swipe gestures (mobile), on-screen buttons
• Replay system — record inputs as JSON, play back deterministically
• Statistics — tracks scores, levels, play time, piece usage across sessions
• Serializable state — save/restore via SharedPreferences, Hive, or any storage

Installation

dependencies:
  tetris_engine: ^1.0.0

Quick Start

final game = TetrisGame();
game.start();

// In your widget tree:
TetrisBoard(
  game: game,
  theme: darkTetrisTheme,
  onGameOver: () => print('Game over! Score: ${game.state.scoreState.score}'),
  onScoreChanged: (score) => print('Score: $score'),
)

Layout Example

Row(
  children: [
    Column(
      children: [
        HoldPiecePreview(game: game),
        ScorePanel(game: game),
        LevelPanel(game: game),
        LinesClearedPanel(game: game),
      ],
    ),
    SizedBox(width: 200, child: TetrisBoard(game: game)),
    NextPiecePreview(game: game, count: 4),
  ],
)

Theme Customization

// Built-in themes
TetrisBoard(game: game, theme: defaultTetrisTheme);  // light
TetrisBoard(game: game, theme: darkTetrisTheme);      // dark
TetrisBoard(game: game, theme: colorblindTetrisTheme); // Wong palette

// Custom theme
final myTheme = darkTetrisTheme.copyWith(
  boardBackground: Colors.black,
  tetrominoColors: TetrominoColors(
    fill: { TetrominoType.I: Colors.cyan, ... },
    border: { TetrominoType.I: Colors.blue, ... },
  ),
);

Replay

// Record
final recorder = ReplayRecorder();
recorder.startRecording();
// ... play the game ...
recorder.stopRecording();
final json = recorder.exportJson();

// Replay
final player = ReplayPlayer(InputController(game));
recorder.importJson(json);
player.play(recorder.frames);

Saving State

// Serialize
final json = game.toJson();
prefs.setString('tetris_save', jsonEncode(json));

// Restore
game.loadFromJson(jsonDecode(prefs.getString('tetris_save')!));

Custom Board Size

TetrisGame(boardRows: 24, boardCols: 10, nextQueueSize: 6)

Keyboard Controls (Desktop / Web)

Key	Action
← / A	Move left
→ / D	Move right
↓ / S	Soft drop
↑ / W	Rotate CW
Z	Rotate CCW
Space	Hard drop
C	Hold
P / Esc	Pause

Mobile Controls

• Tap → Rotate CW
• Swipe left/right → Move
• Swipe down → Soft drop
• Fast swipe down → Hard drop
• Long press → Hold

Architecture

TetrisGame (ChangeNotifier)
├── CollisionSystem    — pure collision / ghost piece
├── RotationSystem     — SRS wall kicks
├── BoardManager       — lock + line clear
├── PieceManager       — 7-bag randomizer
├── ScoringSystem      — guideline scoring
└── LevelSystem        — progression & gravity

Widgets
├── TetrisBoard        — CustomPainter renderer
├── NextPiecePreview   — upcoming pieces
├── HoldPiecePreview   — held piece
├── ScorePanel / LevelPanel / LinesClearedPanel
├── GameOverOverlay / PauseOverlay
└── StatisticsPanel

License

MIT