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Cuber

Cuber

Pub Version Star on GitHub License: MIT CI

This is a Dart implementation of Herbert Kociemba's two-phase algorithm for solving Rubik's Cube. This was inspired by C implementation of muodov/kociemba and tremwil/TwoPhaseSolver projects.

Installing

Add this to your package's pubspec.yaml file:

  1. Depend on it
dependencies:
  cuber: ^0.4.0

Usage

import 'package:cuber/cuber.dart';

/// Create an instance of Cube class.
final cube0 = Cube.solved;
final cube1 = Cube.from('UUUUUUUUURRRRRRRRRFFFFFFFFFDDDDDDDDDLLLLLLLLLBBBBBBBBB');
final cube2 = Cube.of([Color.up, ...]);
// Scrambled.
final cube3 = Cube.scrambled();
// Predefined patterns.
final cube4 = Cube.checkerboard;
final cube5 = Cube.wire;
final cube6 = Cube.spiral;
final cube7 = Cube.stripes;
final cube8 = Cube.crossOne;
final cube9 = Cube.crossTwo;
final cube10 = Cube.fourSpots;
final cube11 = Cube.sixSpots;
final cube12 = Cube.sixTs;

// The cube is mounted correctly.
final isOk = cube0.verify() == CubeStatus.ok; // or cube0.isOk
// The cube is solved.
final isSolved = cube1.isSolved;

// Apply basic moves.
final cube13 = cube0.move(Move.front).move(Move.rightDouble).move(Move.upInv);

// Find solutions.
final solution0 = cube11.solve(maxDepth: 25, duration: Duration(minutes: 1));
print(solution0.algorithm.moves);
// Stream<Solution>.
final solutions = cube11.solveDeeply(duration: Duration(minutes: 1));

// Solve patterns.
final cube14 = Cube.from('UUFLUFBULDLRURUUFBUBBFFLDBRFDBLDRDRRFDLBLDFBRURLFBRDDL');
final cube15 = Cube.from('RRRUUFRLBLDFRRDULLUBDBFUULLRUFFDFLLDBFBRLUURFDDDBBBFDB');
final cube16 = cube14.patternize(cube15); // From cube14 to cube15.
final solution1 = cube16.solve(maxDepth: 25, duration: Duration(minutes: 1));

// SVG.
final String svg = cube16.svg();
File('cube.svg').writeAsStringSync(svg);

Cube string notation

             |************|
             |*U1**U2**U3*|
             |************|
             |*U4**U5**U6*|
             |************|
             |*U7**U8**U9*|
 ************|************|************|************
 *L1**L2**L3*|*F1**F2**F3*|*R1**R2**R3*|*B1**B2**B3*
 ************|************|************|************
 *L4**L5**L6*|*F4**F5**F6*|*R4**R5**R6*|*B4**B5**B6*
 ************|************|************|************
 *L7**L8**L9*|*F7**F8**F9*|*R7**R8**R9*|*B7**B8**B9*
 ************|************|************|************
             |*D1**D2**D3*|
             |************|
             |*D4**D5**D6*|
             |************|
             |*D7**D8**D9*|
             |************|

A cube definition string "UBL..." means that in position U1 we have the U-color, in position U2 we have the B-color, in position U3 we have the L color etc. according to the order U1, U2, U3, U4, U5, U6, U7, U8, U9, R1, R2, R3, R4, R5, R6, R7, R8, R9, F1, F2, F3, F4, F5, F6, F7, F8, F9, D1, D2, D3, D4, D5, D6, D7, D8, D9, L1, L2, L3, L4, L5, L6, L7, L8, L9, B1, B2, B3, B4, B5, B6, B7, B8, B9.

So, for example, a definition of a solved cube would be UUUUUUUUURRRRRRRRRFFFFFFFFFDDDDDDDDDLLLLLLLLLBBBBBBBBB.

The solution consists of list of moves.

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