From ef5c3bce84de94d4533070c3a57df313a6c9eb45 Mon Sep 17 00:00:00 2001
From: nocturn9x <nocturn9x@nocturn9x.space>
Date: Mon, 16 Oct 2023 22:39:54 +0200
Subject: [PATCH] Added two missing diagonals for sliding pieces

---
 src/Chess/board.nim | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/Chess/board.nim b/src/Chess/board.nim
index e5c7e24..69bace0 100644
--- a/src/Chess/board.nim
+++ b/src/Chess/board.nim
@@ -108,6 +108,8 @@ proc generateMoves(self: ChessBoard, location: Location): seq[Move]
 
 func topLeftDiagonal(piece: Piece): Location {.inline.} = (if piece.color == White: (-1, -1) else: (1, 1))
 func topRightDiagonal(piece: Piece): Location {.inline.} = (if piece.color == White: (-1, 1) else: (1, -1))
+func bottomLeftDiagonal(piece: Piece): Location {.inline.} = (if piece.color == White: (-1, -1) else: (1, 1))
+func bottomRightDiagonal(piece: Piece): Location {.inline.} = (if piece.color == White: (1, 1) else: (-1, -1))
 func forward(piece: Piece): Location {.inline.} = (if piece.color == Black: (1, 0) else: (-1, 0))
 func doublePush(piece: Piece): Location {.inline.} = (if piece.color == Black: (2, 0) else: (-2, 0))
 proc testMoveOffsets(self: ChessBoard, move: Move): bool
@@ -478,10 +480,8 @@ proc generateSlidingMoves(self: ChessBoard, location: Location): seq[Move] =
     var 
         piece = self.grid[location.row, location.col]
     doAssert piece.kind in [Bishop, Rook, Queen], &"generateSlidingMoves called on a {piece.kind}"
-    var directions: seq[Location] = @[piece.topRightDiagonal(), piece.topLeftDiagonal()]
-    echo piece, " ", location
+    var directions: seq[Location] = @[piece.topRightDiagonal(), piece.topLeftDiagonal(), piece.bottomLeftDiagonal(), piece.bottomRightDiagonal()]
     for direction in directions:
-        echo "dir ", direction
         # Slide in this direction as long as it's possible
         var
             square: Location = location
@@ -491,7 +491,6 @@ proc generateSlidingMoves(self: ChessBoard, location: Location): seq[Move] =
             # End of board reached
             if not square.isValid():
                 break
-            echo square
             otherPiece = self.grid[square.row, square.col]
             # A friendly piece is in the way
             if otherPiece.color == piece.color: