game

func (*Board) ColorTest ¶

func (b *Board) ColorTest()

ColorTest fills the board with all "legal" values for testing purposes.

func (Board) HasMovesLeft ¶

func (b Board) HasMovesLeft() bool

HasMovesLeft returns true if the board can be played (ie. not in an endgame situation).

func (Board) IsFull ¶

func (b Board) IsFull() bool

IsFull returns true if the board has a value > 0 in every tile.

func (Board) Moves ¶

func (b Board) Moves() int

func (*Board) PlaceRandom ¶

func (b *Board) PlaceRandom() error

PlaceRandom places a 2 or a 4 (10% chance) in a random empty tile.

func (*Board) Reset ¶

func (b *Board) Reset()

func (Board) Score ¶

func (b Board) Score() int

func (*Board) Shift ¶

func (b *Board) Shift(dir Direction) bool

Shift pushes all tiles in the given direction until they either merge, reach

the border, or reach a tile with a different value.

If no movement occured, Shift returns false.

The algorithm is quite naive and was taken from C++ code I wrote at a 4 hours hackathon years ago, it iterates over all cells to merge/displace them and does this BoardSide times to ensure no gap is left between tiles. To avoid collapsing a whole row (eg. 2 2 4 8 -> 16 instead of 0 4 4 8) each tile that resulted from a merge is marked as "frozen" and will be skipped for the next iterations.

func (Board) String ¶

func (b Board) String() string

String returns a human-readable version of the Board.

func (Board) Won ¶

func (b Board) Won() bool

Won returns true if board holds a winning game, meaning the player reached 2048 (it's the name of the game).