/// <summary>
/// Moves tetrimino
/// </summary>
/// <param name="moveDirection">Direction of movement</param>
/// <param name="checkCollision">Collision checker</param>
/// <returns>True if tetrimino has moved</returns>
public bool Move(MoveDirection moveDirection, Func <Block, bool> checkCollision)
{
var position = Position;
if (moveDirection == MoveDirection.Down)
{
var row = position.Row + 1;
position = new Position(row, position.Column);
}
else
{
var delta = (moveDirection == MoveDirection.Right) ? 1 : -1;
var column = position.Column + delta;
position = new Position(position.Row, column);
}
var blocks = TetriminoKind.CreateBlocks(position, Direction);
if (blocks.Any(checkCollision))
{
return(false);
}
Position = position;
Blocks = blocks;
return(true);
}
/// <summary>
/// Rotates tetrimino
/// </summary>
/// <param name="rotationDirection">Direction of rotation</param>
/// <param name="checkCollision">Collision checker</param>
/// <returns>True if tetrimino has rotated</returns>
public bool Rotation(RotationDirection rotationDirection, Func <Block, bool> checkCollision)
{
var count = Enum.GetValues(typeof(Direction)).Length;
var delta = (rotationDirection == RotationDirection.Right) ? 1 : -1;
var direction = (int)Direction + delta;
if (direction < 0)
{
direction += count;
}
if (direction >= count)
{
direction %= count;
}
var adjustPattern = TetriminoKind == TetriminoKind.I ? new[] { 0, 1, -1, 2, -2 } : new[] { 0, 1, -1 };
foreach (var adjust in adjustPattern)
{
var position = new Position(Position.Row, Position.Column + adjust);
var blocks = TetriminoKind.CreateBlocks(position, (Direction)direction);
if (blocks.Any(checkCollision))
{
continue;
}
Direction = (Direction)direction;
Position = position;
Blocks = blocks;
return(true);
}
return(false);
}
private Tetrimino(TetriminoKind tetriminoKind)
{
TetriminoKind = tetriminoKind;
Position = tetriminoKind.InitialPosition();
Blocks = tetriminoKind.CreateBlocks(Position);
}