FatalErrorCmd returns a command for creating a new FatalErrorMsg with the given error.

Next returns the next Tetrimino, removing it from the queue and refilling if necessary. This applies the skyline value (provided in NewNextQueue) to t

AddTetrimino adds the given Tetrimino to the Matrix. It returns an error if the Tetrimino is out of bounds or if the Tetrimino overlaps with an occupi

GetSkyline returns the skyline; the highest row that the player can see.

MoveDown moves the tetrimino down one row. This does not modify the matrix. If the tetrimino cannot move down, it will not be modified and false will

NewNextQueue creates a new NextQueue of Tetriminos.

setupNewTetInPlay will do the following setup for the new Tetrimino in play: - If possible, move down one row into the visible Matrix. - Check for Loc

AddSoftDrop adds points for a soft drop.

DeepCopy creates a deep copy of the Tetrimino. This is useful when you need to modify a Tetrimino without affecting the original.

DefaultMatrix creates a new Matrix with a height of 40 and a width of 10.

Level returns the current level.

NewMatrix creates a new Matrix with the given height and width. It returns an error if the height is less than 20 to allow for a buffer zone of 20 lin

NewMockStopwatch creates a new instance of MockStopwatch. It also registers a testing interface on the mock and a cleanup function to assert the mocks

Rotate rotates the Tetrimino clockwise or counter-clockwise. This does not modify the matrix. This will automatically use Super Rotation System (SRS).

Save saves a score to the leaderboard and returns the ID of the new score.

fill adds Tetriminos to the queue until it has 7 or more. This is done by getting all valid Tetriminos, shuffling them, and adding them to the queue.

positiveMod calculates the positive modulus of the dividend and divisor. This is used to handle negative numbers in a way that is consistent with the

transpose transposes the Tetrimino's cells. This is used during rotation to rotate the Tetrimino.

AddHardDrop adds points for a hard drop.

GetTetrimino returns the Tetrmino with the given value. Valid values are: I, O, T, S, Z, J, L.

IsAboveSkyline returns true if the entire Tetrimino is above the skyline. This can be helpful when checking for Lock Out.

IsValid returns true if the given Tetrimino is within the bounds of the matrix and does not overlap with any occupied cells. If checkBounds is false,

Lines returns the total lines cleared.

MoveLeft moves the tetrimino left one column. This does not modify the matrix. If the tetrimino cannot move left false will be returned.

MoveRight moves the tetrimino right one column. This does not modify the matrix. If the tetrimino cannot move right false will be returned.

NewScoring creates a new scoring system.

ProcessAction processes an action and updates the score, lines cleared, level, etc. The returned boolean indicates if the game should end.

RemoveCompletedLines checks each row that the given Tetrimino occupies and removes any completed lines from the Matrix. It returns an Action to be use

String returns the string representation of the Action.

Total returns the total score.

deepCopyCells creates a deep copy of the given 2D grid of cells.

lowerTetInPlay moves the current Tetrimino down one row if possible. If it cannot be moved down this will instead remove completed lines, calculate sc

rotateClockwise rotates the Tetrimino clockwise. This does not modify the matrix. If a valid rotation is found, the rotation point is returned. If no

rotateCounterClockwise rotates the Tetrimino counter-clockwise. This does not modify the matrix. If a valid rotation is found, the rotation point is r

EndGame sets Game.gameOver to true.

GetElements returns the Tetriminos in the queue.

GetEmptyTetrimino returns a tetrimino to be used for the starting (empty) hold.

GetHeight returns the height of the Matrix.