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Linear + Diagonal moves

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cdricms
2024-06-27 18:09:01 +02:00
parent bc145da022
commit 8b5c2a592e
11 changed files with 179 additions and 108 deletions
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35
Sources/Engine/Pieces/Pawn.swift
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@@ -1,32 +1,29 @@
internal final class Pawn: Piece {
internal var kind: Kind = .Pawn
internal weak var board: Board?
internal var color: Color
internal var position: Square.Position
internal var pseudoLegalPositions: [Square.Position] {
final class Pawn: Piece {
var kind: Kind = .Pawn
weak var board: Board?
var color: Color
var position: Square.Position
var pseudoLegalPositions: [Square.Position] {
let sign: Int8 = color == .Black ? -1 : 1
let rank = Int8(position.rank)
let directions: [Square.Position] = [
.init(file: position.file, rank: rank + 1 * sign),
.init(file: position.file, rank: rank + 2 * sign),
.init(file: position.file + 1, rank: rank + 1 * sign),
.init(file: position.file - 1, rank: rank + 1 * sign)
.init(rank: rank + 1 * sign, file: position.file),
.init(rank: rank + 2 * sign, file: position.file),
.init(rank: rank + 1 * sign, file: position.file + 1),
.init(rank: rank + 1 * sign, file: position.file - 1)
]
// TODO: Handle en passant
return directions.filter {
let index = $0.index
return index < 1 || index > 63
}
return directions.filter { $0.index != nil }
}
internal var legalPositions: [Square.Position] {
var legalPositions: [Square.Position] {
pseudoLegalPositions.filter { isLegal(on: $0) }
}
internal var unicodeRepresentation: String {
var unicodeRepresentation: String {
color == .Black ? "♟" : "♙"
}
internal func move(to dst: Square.Position) -> Bool {
func move(to dst: Square.Position) -> Bool {
guard board != nil else {
return false
}
@@ -45,7 +42,7 @@ internal final class Pawn: Piece {
return true
}
internal func isLegal(on pos: Square.Position) -> Bool {
func isLegal(on pos: Square.Position) -> Bool {
// TODO: Handle "En-Passant"
if let board = board, let s = board[pos] {
if let p = s.piece {
@@ -60,7 +57,7 @@ internal final class Pawn: Piece {
return true
}
internal init(
init(
color: Color, on position: Square.Position
) {
self.color = color