public static MoveContext GetRotationContext(Tetromino tetromino, bool isCounterClockwise = false)
{
var newMatrix = GetRotatedMatrix(tetromino.BodyMatrix, isCounterClockwise);
var rotatedPositions = Tetromino.GetPositions(tetromino.TopLeft, newMatrix);
return(new MoveContext(tetromino.TopLeft, rotatedPositions, newMatrix));
}
public static Tetromino GenerateRandomTetromino(PositionInfo initialPosition)
{
TetrominoShapeType shapeType = shapeTypes[randomNumberGenerator.Next(0, shapeTypes.Length)];
var tetromino = new Tetromino(initialPosition, shapeType);
return(tetromino);
}
internal static void UpdateField(Tetromino tetromino, Brush[,] fieldMatrix)
{
for (int i = 0; i < tetromino.BodyPositions.Count; i++)
{
var position = tetromino.BodyPositions[i];
fieldMatrix[position.Y, position.X] = tetromino.Brush;
}
}
private static void RemoveTetrominoFromFieldMatrix(Tetromino tetromino, Brush[,] matrix)
{
for (int i = 0; i < tetromino.BodyPositions.Count; i++)
{
var position = tetromino.BodyPositions[i];
matrix[position.Y, position.X] = null;
}
}
private bool TryDropNewTetromino()
{
Tetromino tetromino = this.nextTetromino != null ? this.nextTetromino : TetrominoGenerator.GenerateRandomTetromino(new PositionInfo(3, 0));
this.nextTetromino = TetrominoGenerator.GenerateRandomTetromino(new PositionInfo(3, 0));
var movingContext = TetrominoMover.GetMoveContext(tetromino, MovementDirection.Down, movementSpeed);
if (!CollisionDetector.CollisionDetected(tetromino, this.playfieldInfo.FieldMatrix, movingContext.Positions))
{
this.fallingTetromino = tetromino;
return(true);
}
return(false);
}
internal static bool CollisionDetected(Tetromino tetromino, Brush[,] fieldMatrix, List <PositionInfo> updatedTetrominoPositions)
{
Brush[,] modifiedFieldMatrix = ExcludeFromFieldMatrix(fieldMatrix, tetromino.BodyPositions);
int rows = modifiedFieldMatrix.GetLength(0);
int cols = modifiedFieldMatrix.GetLength(1);
foreach (PositionInfo position in updatedTetrominoPositions)
{
bool isOutsideMatrix = position.X < 0 || position.X >= cols || position.Y < 0 || position.Y >= rows;
if (isOutsideMatrix || modifiedFieldMatrix[position.Y, position.X] != null)
{
return(true);
}
}
return(false);
}
public static MoveContext GetMoveContext(Tetromino tetromino, MovementDirection direction, int speed)
{
PositionInfo newTopLeft = tetromino.TopLeft;
if (direction == MovementDirection.Down)
{
newTopLeft = new PositionInfo(tetromino.TopLeft.X, tetromino.TopLeft.Y + speed);
}
else if (direction == MovementDirection.Left)
{
newTopLeft = new PositionInfo(tetromino.TopLeft.X - speed, tetromino.TopLeft.Y);
}
else if (direction == MovementDirection.Right)
{
newTopLeft = new PositionInfo(tetromino.TopLeft.X + speed, tetromino.TopLeft.Y);
}
var context = new MoveContext(newTopLeft, Tetromino.GetPositions(newTopLeft, tetromino.BodyMatrix), tetromino.BodyMatrix);
return(context);
}
public static void Move(Tetromino tetromino, Brush[,] fieldMatrix, MoveContext context)
{
RemoveTetrominoFromFieldMatrix(tetromino, fieldMatrix);
tetromino.Move(context);
UpdateField(tetromino, fieldMatrix);
}
