63 lines
2.9 KiB
C#
63 lines
2.9 KiB
C#
using System.Diagnostics;
|
|
|
|
namespace Gameboard.ShogiUI.BoardState
|
|
{
|
|
/// <summary>
|
|
/// Provides normalized BoardVectors relative to player.
|
|
/// "Up" for player 1 is "Down" for player 2; that sort of thing.
|
|
/// </summary>
|
|
public class Direction
|
|
{
|
|
private static readonly BoardVector PositiveX = new BoardVector(1, 0);
|
|
private static readonly BoardVector NegativeX = new BoardVector(-1, 0);
|
|
private static readonly BoardVector PositiveY = new BoardVector(0, 1);
|
|
private static readonly BoardVector NegativeY = new BoardVector(0, -1);
|
|
private static readonly BoardVector PositiveYX = new BoardVector(1, 1);
|
|
private static readonly BoardVector NegativeYX = new BoardVector(-1, -1);
|
|
private static readonly BoardVector NegativeYPositiveX = new BoardVector(1, -1);
|
|
private static readonly BoardVector PositiveYNegativeX = new BoardVector(-1, 1);
|
|
|
|
private readonly WhichPlayer whichPlayer;
|
|
public Direction(WhichPlayer whichPlayer)
|
|
{
|
|
this.whichPlayer = whichPlayer;
|
|
}
|
|
|
|
public BoardVector Up => whichPlayer == WhichPlayer.Player1 ? PositiveY : NegativeY;
|
|
public BoardVector Down => whichPlayer == WhichPlayer.Player1 ? NegativeY : PositiveY;
|
|
public BoardVector Left => whichPlayer == WhichPlayer.Player1 ? NegativeX : PositiveX;
|
|
public BoardVector Right => whichPlayer == WhichPlayer.Player1 ? PositiveX : NegativeX;
|
|
public BoardVector UpLeft => whichPlayer == WhichPlayer.Player1 ? PositiveYNegativeX : NegativeYPositiveX;
|
|
public BoardVector UpRight => whichPlayer == WhichPlayer.Player1 ? PositiveYX : NegativeYX;
|
|
public BoardVector DownLeft => whichPlayer == WhichPlayer.Player1 ? NegativeYX : PositiveYX;
|
|
public BoardVector DownRight => whichPlayer == WhichPlayer.Player1 ? NegativeYPositiveX : PositiveYNegativeX;
|
|
public BoardVector KnightLeft => whichPlayer == WhichPlayer.Player1 ? new BoardVector(-1, 2) : new BoardVector(1, -2);
|
|
public BoardVector KnightRight => whichPlayer == WhichPlayer.Player1 ? new BoardVector(1, 2) : new BoardVector(-1, -2);
|
|
|
|
}
|
|
|
|
[DebuggerDisplay("[{X}, {Y}]")]
|
|
public class BoardVector
|
|
{
|
|
public int X { get; set; }
|
|
public int Y { get; set; }
|
|
public bool IsValidBoardPosition => X > -1 && X < 9 && Y > -1 && Y < 9;
|
|
public bool IsHand => X < 0 && Y < 0; // TODO: Find a better way to distinguish positions vs hand.
|
|
public BoardVector(int x, int y)
|
|
{
|
|
X = x;
|
|
Y = y;
|
|
}
|
|
|
|
public BoardVector Add(BoardVector other) => new BoardVector(X + other.X, Y + other.Y);
|
|
public override bool Equals(object obj) => (obj is BoardVector other) && other.X == X && other.Y == Y;
|
|
public override int GetHashCode()
|
|
{
|
|
// [0,3] should hash different than [3,0]
|
|
return X.GetHashCode() * 3 + Y.GetHashCode() * 5;
|
|
}
|
|
public static bool operator ==(BoardVector a, BoardVector b) => a.Equals(b);
|
|
public static bool operator !=(BoardVector a, BoardVector b) => !a.Equals(b);
|
|
}
|
|
}
|