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This commit is contained in:
Lucas Morgan
2022-11-09 08:56:54 -06:00
parent 2241ab23fe
commit 3257b420e9
17 changed files with 601 additions and 538 deletions
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17
Shogi.Domain/StandardRules.cs
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@@ -1,10 +1,9 @@
using Shogi.Domain.Pathing;
using Shogi.Domain.ValueObjects;
using Shogi.Domain.ValueObjects;
using BoardTile = System.Collections.Generic.KeyValuePair<System.Numerics.Vector2, Shogi.Domain.ValueObjects.Piece>;
namespace Shogi.Domain
{
internal class StandardRules
internal class StandardRules
{
private readonly BoardState boardState;
@@ -55,7 +54,7 @@ namespace Shogi.Domain
boardState[to] = fromPiece;
boardState[from] = null;
boardState.RememberAsMostRecentMove(from, to);
boardState.PreviousMove = new Move(from, to);
var otherPlayer = boardState.WhoseTurn == WhichPlayer.Player1 ? WhichPlayer.Player2 : WhichPlayer.Player1;
boardState.WhoseTurn = otherPlayer;
@@ -121,16 +120,16 @@ namespace Shogi.Domain
/// </remarks>
internal bool IsPlayerInCheckAfterMove()
{
var previousMovedPiece = boardState[boardState.PreviousMoveTo];
if (previousMovedPiece == null) throw new ArgumentNullException(nameof(previousMovedPiece), $"No piece exists at position {boardState.PreviousMoveTo}.");
var previousMovedPiece = boardState[boardState.PreviousMove.To];
if (previousMovedPiece == null) throw new ArgumentNullException(nameof(previousMovedPiece), $"No piece exists at position {boardState.PreviousMove.To}.");
var kingPosition = previousMovedPiece.Owner == WhichPlayer.Player1 ? boardState.Player1KingPosition : boardState.Player2KingPosition;
var isCheck = false;
// Get line equation from king through the now-unoccupied location.
var direction = Vector2.Subtract(kingPosition, boardState.PreviousMoveFrom);
var direction = Vector2.Subtract(kingPosition, boardState.PreviousMove.From);
var slope = Math.Abs(direction.Y / direction.X);
var path = BoardState.GetPathAlongDirectionFromStartToEdgeOfBoard(boardState.PreviousMoveFrom, Vector2.Normalize(direction));
var path = BoardState.GetPathAlongDirectionFromStartToEdgeOfBoard(boardState.PreviousMove.From, Vector2.Normalize(direction));
var threat = boardState.QueryFirstPieceInPath(path);
if (threat == null || threat.Owner == previousMovedPiece.Owner) return false;
// If absolute slope is 45°, look for a bishop along the line.
@@ -165,7 +164,7 @@ namespace Shogi.Domain
return isCheck;
}
internal bool IsOpponentInCheckAfterMove() => IsOpposingKingThreatenedByPosition(boardState.PreviousMoveTo);
internal bool IsOpponentInCheckAfterMove() => IsOpposingKingThreatenedByPosition(boardState.PreviousMove.To);
internal bool IsOpposingKingThreatenedByPosition(Vector2 position)
{