/// <summary>
/// Constructor of the board
/// </summary>
public Board()
{
//Init line remove
linesToRemoveId = new List <int>();
lineRemoveState = 0;
//Init grid
landedShape = new int[Settings.BOARD_HEIGHT][];
for (int i = 0; i < landedShape.Length; i++)
{
landedShape[i] = new int[Settings.BOARD_WIDTH];
}
//Create first shape
CurrentShape = Tetromino.Random(Settings.START_X, Settings.START_Y);
//Create next shape
NextShape = Tetromino.Random(Settings.START_X, Settings.START_Y);
//Statistics
statistics = new Dictionary <Tetromino.Shape, int>();
foreach (Tetromino.Shape shape in Enum.GetValues(typeof(Tetromino.Shape)))
{
statistics.Add(shape, 0);
}
}
/// <summary>
/// Move the pieces one line down
/// </summary>
public bool Down()
{
Tetromino movedShape = CurrentShape.Down();
if (CanMove(movedShape))
{
CurrentShape = movedShape;
return(true);
}
return(false);
}
/// <summary>
/// Move the piece one column left
/// </summary>
public bool Left()
{
Tetromino nextShape = CurrentShape.Left();
if (CanMove(nextShape))
{
CurrentShape = nextShape;
return(true);
}
return(false);
}
/// <summary>
/// Turn the pieces
/// </summary>
public bool TurnCCW()
{
//turn currentShape
Tetromino nextShape = CurrentShape.RotateCCW();
if (CanMove(nextShape))
{
CurrentShape = nextShape;
return(true);
}
return(false);
}
/// <summary>
/// Return true if the move is valid
/// </summary>
/// <param name="nextPos"></param>
/// <param name="shape"></param>
/// <returns></returns>
private bool CanMove(Tetromino shape)
{
int n = shape.Grid.GetLength(0);
for (int i = 0; i < n; ++i)
{
for (int j = 0; j < n; ++j)
{
if (shape.Grid[i, j] > 0 && shape.y + i >= 0 && (
shape.y + i >= Settings.BOARD_HEIGHT ||
shape.x + j < 0 || shape.x + j >= Settings.BOARD_WIDTH ||
landedShape[shape.y + i][shape.x + j] > 0))
{
return(false);
}
}
}
return(true);
}
/// <summary>
/// Trigger when a turn must be run
/// </summary>
/// <returns>Nb line removed - (-1) for Game Over</returns>
public int Tick()
{
if (endGameState >= Settings.BOARD_HEIGHT)
{
return(-1);
}
if (AnimationEndGame)
{
EndLineAnimate(endGameState);
++endGameState;
return(-1);
}
if (lineRemoveState > 0)
{
switch (lineRemoveState)
{
//Last state, move down all the lines
case 1:
ClearLines(linesToRemoveId);
break;
//Default we remove two squares
default:
RemoveAnimate(linesToRemoveId, lineRemoveState);
break;
}
--lineRemoveState;
return(0);
}
if (!Down())
{
// Detect Game Over
if (CurrentShape.y < 0)
{
++endGameState;
landedShape = MergeGridWithShape();
CurrentShape = Tetromino.Empty();
return(-1);
}
//Update statistics
statistics[CurrentShape.shape]++;
//Merge shape to current grid
landedShape = MergeGridWithShape();
//Clear lines
linesToRemoveId = CompletedLines(CurrentShape.y);
//Change current shape
CurrentShape = NextShape;
//Generate next shape
NextShape = Tetromino.Random(Settings.START_X, Settings.START_Y);
//Set removing line state
lineRemoveState = 6;
return(linesToRemoveId.Count());
}
else
{
//Tetromino not down Nothing to do
}
return(0);
}
