/// <summary>
/// Updates the ValidMoves property of this piece
/// </summary>
/// <param name="board">Game board</param>
public override void UpdateValidMoveList(Board board)
{
List<Point> possibleMoves = GetMoveList(board);
List<Point> forbiddenMoves = new List<Point>();
foreach (Point position in possibleMoves) // Adds movement rules specific for pawns
{
if (this.Position.X == position.X)
{
if (!board.GetTile(position).IsEmpty())
forbiddenMoves.Add(position);
}
else
{
if (board.GetTile(position).IsEmpty())
forbiddenMoves.Add(position);
}
}
foreach (Point position in forbiddenMoves)
possibleMoves.Remove(position);
this.ValidMoves = possibleMoves;
}
public void GetTileTest_Null()
{
Board target = new Board();
Point position = new Point(8, 7); // We know from CoordinateToIndexTest_87 that (8,7) is equivalent to index: 64
Tile actual; // which should give us an IndexOutOfRange error
actual = target.GetTile(position);
}
/// <summary>
/// Checks for collision with pieces of piece-type King and pieces of the same side
/// </summary>
/// <param name="position">Point position of tile</param>
/// <param name="board">Game board</param>
/// <returns>bool</returns>
private bool ForbiddenCollision(Point position, Board board)
{
return board.GetTile(position).OccupiedBy(PieceType.King) || board.GetTile(position).IsOccupiedBy(this.Side);
}
public void GetTileTest_notNull()
{
Board target = new Board();
Point position = new Point(0, 0); // We know from CoordinateToIndexTest_00 that (0,0) is equivalent to index: 0
Tile expected = target.Tiles[0]; // The result should be the first tile in the list of tiles
Tile actual;
actual = target.GetTile(position);
Assert.AreEqual(expected, actual);
}
/// <summary>
/// Returns a list of possible moves based on the piece direction vector and movement range
/// </summary>
/// <param name="board">Game board</param>
/// <returns>List of Points</returns>
protected List<Point> GetMoveList(Board board)
{
List<Point> moves = new List<Point>();
foreach (Point direction in directionVector)
{
for (int i = 1; i <= moveReach; i++)
{
Point point = new Point(this.position.X + direction.X * i, this.position.Y + direction.Y * i);
if (board.InBounds(point))
{
if (!ForbiddenCollision(point, board))
moves.Add(point);
if (!board.GetTile(point).IsEmpty())
break;
}
}
}
return moves;
}
