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Add pure-Dart engine core: RNG, grid, placement, line clear, scoring, piece generator

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PCG32 seeded RNG; immutable 8x8 GridState with occupancy bitmask;
placement legality + anyPlacementExists; simultaneous row/col clears
with single-count gem credit; combo scoring with one-move grace;
weighted-bag generator with pity bias and depth-3 solvability nudge.
All TDD, 51 tests green.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
airkjw
2026-06-11 13:05:55 +09:00
parent 40528238b2
commit 0210c14858
19 changed files with 1408 additions and 0 deletions
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lib/game/models/piece_library.dart
+241
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import 'piece.dart';
/// The fixed-orientation polyomino set (no play-time rotation, genre
/// convention). Base weights skew small pieces common; stage generator
/// profiles rescale per difficulty.
class PieceLibrary {
static const double _small = 1.2;
static const double _mid = 1.0;
static const double _large = 0.7;
static const List<Piece> all = [
// --- size 1-2 ---
Piece(id: 'mono', colorId: 0, weight: _small, tier: 1, offsets: [(0, 0)]),
Piece(
id: 'domino_h',
colorId: 1,
weight: _small,
tier: 1,
offsets: [(0, 0), (1, 0)]),
Piece(
id: 'domino_v',
colorId: 1,
weight: _small,
tier: 1,
offsets: [(0, 0), (0, 1)]),
// --- trominoes ---
Piece(
id: 'line3_h',
colorId: 2,
weight: _small,
tier: 1,
offsets: [(0, 0), (1, 0), (2, 0)]),
Piece(
id: 'line3_v',
colorId: 2,
weight: _small,
tier: 1,
offsets: [(0, 0), (0, 1), (0, 2)]),
Piece(
id: 'corner3_tl',
colorId: 3,
weight: _small,
tier: 1,
offsets: [(0, 0), (1, 0), (0, 1)]),
Piece(
id: 'corner3_tr',
colorId: 3,
weight: _small,
tier: 1,
offsets: [(0, 0), (1, 0), (1, 1)]),
Piece(
id: 'corner3_bl',
colorId: 3,
weight: _small,
tier: 1,
offsets: [(0, 0), (0, 1), (1, 1)]),
Piece(
id: 'corner3_br',
colorId: 3,
weight: _small,
tier: 1,
offsets: [(1, 0), (0, 1), (1, 1)]),
// --- tetrominoes ---
Piece(
id: 'line4_h',
colorId: 4,
weight: _mid,
tier: 2,
offsets: [(0, 0), (1, 0), (2, 0), (3, 0)]),
Piece(
id: 'line4_v',
colorId: 4,
weight: _mid,
tier: 2,
offsets: [(0, 0), (0, 1), (0, 2), (0, 3)]),
Piece(
id: 'square2',
colorId: 5,
weight: _mid,
tier: 1,
offsets: [(0, 0), (1, 0), (0, 1), (1, 1)]),
Piece(
id: 't4_up',
colorId: 6,
weight: _mid,
tier: 2,
offsets: [(0, 0), (1, 0), (2, 0), (1, 1)]),
Piece(
id: 't4_down',
colorId: 6,
weight: _mid,
tier: 2,
offsets: [(1, 0), (0, 1), (1, 1), (2, 1)]),
Piece(
id: 't4_left',
colorId: 6,
weight: _mid,
tier: 2,
offsets: [(1, 0), (0, 1), (1, 1), (1, 2)]),
Piece(
id: 't4_right',
colorId: 6,
weight: _mid,
tier: 2,
offsets: [(0, 0), (0, 1), (1, 1), (0, 2)]),
Piece(
id: 's4_h',
colorId: 7,
weight: _mid,
tier: 2,
offsets: [(1, 0), (2, 0), (0, 1), (1, 1)]),
Piece(
id: 's4_v',
colorId: 7,
weight: _mid,
tier: 2,
offsets: [(0, 0), (0, 1), (1, 1), (1, 2)]),
Piece(
id: 'z4_h',
colorId: 7,
weight: _mid,
tier: 2,
offsets: [(0, 0), (1, 0), (1, 1), (2, 1)]),
Piece(
id: 'z4_v',
colorId: 7,
weight: _mid,
tier: 2,
offsets: [(1, 0), (0, 1), (1, 1), (0, 2)]),
Piece(
id: 'l4_0',
colorId: 0,
weight: _mid,
tier: 2,
offsets: [(0, 0), (0, 1), (0, 2), (1, 2)]),
Piece(
id: 'l4_90',
colorId: 0,
weight: _mid,
tier: 2,
offsets: [(0, 0), (1, 0), (2, 0), (0, 1)]),
Piece(
id: 'l4_180',
colorId: 0,
weight: _mid,
tier: 2,
offsets: [(0, 0), (1, 0), (1, 1), (1, 2)]),
Piece(
id: 'l4_270',
colorId: 0,
weight: _mid,
tier: 2,
offsets: [(2, 0), (0, 1), (1, 1), (2, 1)]),
Piece(
id: 'j4_0',
colorId: 1,
weight: _mid,
tier: 2,
offsets: [(1, 0), (1, 1), (0, 2), (1, 2)]),
Piece(
id: 'j4_90',
colorId: 1,
weight: _mid,
tier: 2,
offsets: [(0, 0), (0, 1), (1, 1), (2, 1)]),
Piece(
id: 'j4_180',
colorId: 1,
weight: _mid,
tier: 2,
offsets: [(0, 0), (1, 0), (0, 1), (0, 2)]),
Piece(
id: 'j4_270',
colorId: 1,
weight: _mid,
tier: 2,
offsets: [(0, 0), (1, 0), (2, 0), (2, 1)]),
// --- size 5-6 ---
Piece(
id: 'line5_h',
colorId: 2,
weight: _large,
tier: 3,
offsets: [(0, 0), (1, 0), (2, 0), (3, 0), (4, 0)]),
Piece(
id: 'line5_v',
colorId: 2,
weight: _large,
tier: 3,
offsets: [(0, 0), (0, 1), (0, 2), (0, 3), (0, 4)]),
Piece(
id: 'rect2x3',
colorId: 3,
weight: _large,
tier: 2,
offsets: [(0, 0), (1, 0), (0, 1), (1, 1), (0, 2), (1, 2)]),
Piece(
id: 'rect3x2',
colorId: 3,
weight: _large,
tier: 2,
offsets: [(0, 0), (1, 0), (2, 0), (0, 1), (1, 1), (2, 1)]),
Piece(
id: 'bigl_tl',
colorId: 4,
weight: _large,
tier: 3,
offsets: [(0, 0), (1, 0), (2, 0), (0, 1), (0, 2)]),
Piece(
id: 'bigl_tr',
colorId: 4,
weight: _large,
tier: 3,
offsets: [(0, 0), (1, 0), (2, 0), (2, 1), (2, 2)]),
Piece(
id: 'bigl_bl',
colorId: 4,
weight: _large,
tier: 3,
offsets: [(0, 0), (0, 1), (0, 2), (1, 2), (2, 2)]),
Piece(
id: 'bigl_br',
colorId: 4,
weight: _large,
tier: 3,
offsets: [(2, 0), (2, 1), (0, 2), (1, 2), (2, 2)]),
// --- size 9 ---
Piece(
id: 'square3',
colorId: 5,
weight: 0.5,
tier: 3,
offsets: [
(0, 0), (1, 0), (2, 0),
(0, 1), (1, 1), (2, 1),
(0, 2), (1, 2), (2, 2),
]),
];
static Piece byId(String id) => all.firstWhere((p) => p.id == id);
}