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@FSaurenbach
FSaurenbach committed Mar 21, 2024
1 parent 3671a48 commit 80765fe
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Showing 2 changed files with 43 additions and 63 deletions.
70 changes: 24 additions & 46 deletions src/commonMain/kotlin/Main.kt
View file
Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,7 @@ var pieces = ArrayList<Piece>()
var whiteTurn = true
var markedCells = ArrayList<Cell>()
/** Initial position of the white king */
var kingPosition = Pair(4, 3)
var whiteKingPosition = Pair(4, 0)
/** Entry point of the application. Initializes the game window and sets up the game scene. */
suspend fun main() =
Korge(windowSize = Size(512, 512), backgroundColor = Colors["#2b2b2b"]) {
Expand Down Expand Up @@ -76,7 +76,7 @@ class GameScene(private val cont: SceneContainer) : PixelatedScene(512, 512) {
var d = 0
for (cx in 0 until 8) {
for (cy in 0 until 8) {
val cellColor = if (d.isEven) Colors.WHITE else Colors.BLACK
val cellColor = if (d.isEven) Colors.WHITE else Colors.MEDIUMSEAGREEN
val cl = Cell(cellColor, cx, cy, cont)
cells.add(cl)
d++
Expand All @@ -90,26 +90,19 @@ class GameScene(private val cont: SceneContainer) : PixelatedScene(512, 512) {
(0 until 8).map { Piece(PieceKind.WhitePawn, Colors.WHITE, it, 1, cont = cont) }
val blackPawns =
(0 until 8).map { Piece(PieceKind.BlackPawn, Colors.BLACK, it, 6, cont = cont) }
// Set up all the rooks
val whiteRook1 = Piece(PieceKind.WhiteRook, Colors.WHITE, 0, 0, cont = cont)
val whiteRook2 = Piece(PieceKind.WhiteRook, Colors.WHITE, 7, 0, cont = cont)
val blackRook1 = Piece(PieceKind.BlackRook, Colors.BLACK, 0, 7, cont = cont)
val blackRook2 = Piece(PieceKind.BlackRook, Colors.BLACK, 7, 7, cont = cont)
// Set up all the knights
val whiteKnight1 = Piece(PieceKind.WhiteKnight, Colors.WHITE, 1, 0, cont = cont)
val whiteKnight2 = Piece(PieceKind.WhiteKnight, Colors.WHITE, 6, 0, cont = cont)
val blackKnight1 = Piece(PieceKind.BlackKnight, Colors.BLACK, 1, 7, cont = cont)
val blackKnight2 = Piece(PieceKind.BlackKnight, Colors.BLACK, 6, 7, cont = cont)
// Set up all the bishops
val whiteBishop1 = Piece(PieceKind.WhiteBishop, Colors.WHITE, 2, 0, cont = cont)
val whiteBishop2 = Piece(PieceKind.WhiteBishop, Colors.WHITE, 5, 0, cont = cont)
val blackBishop1 = Piece(PieceKind.BlackBishop, Colors.BLACK, 2, 7, cont = cont)
val blackBishop2 = Piece(PieceKind.BlackBishop, Colors.BLACK, 5, 7, cont = cont)
// Set up the kings and queens
//val whiteQueen = Piece(PieceKind.WhiteQueen, Colors.WHITE, 3, 0, cont = cont)
val whiteKing = Piece(PieceKind.WhiteKing, Colors.WHITE, 4, 3, cont = cont)
//val blackQueen = Piece(PieceKind.BlackQueen, Colors.BLACK, 3, 7, cont = cont)
//val blackKing = Piece(PieceKind.BlackKing, Colors.BLACK, 4, 7, cont = cont)
val whiteKing = Piece(PieceKind.WhiteKing, Colors.WHITE, 3, 0, cont = cont)

pieces.addAll(
whitePawns +
Expand Down Expand Up @@ -162,15 +155,15 @@ class GameScene(private val cont: SceneContainer) : PixelatedScene(512, 512) {
"Found Cell where piece is located: ${cell.cx}, ${cell.cy}")
}
if (selectedPiece!!.moveChecker(
newPosition!!, Pair(cell.cx, cell.cy), false, false)) {
// println("Can move to: ${cell.cx}, ${cell.cy}")
newPosition!!,
Pair(cell.cx, cell.cy),
performMove = false,
king = false)) {
changeColor(cell.cy, cell.cx, false)
markedCells.add(cell)
}
}

}

}

// When dragging ends
Expand All @@ -192,14 +185,15 @@ class GameScene(private val cont: SceneContainer) : PixelatedScene(512, 512) {

// Perform the move if no error
if (!error) {
if (selectedPiece!!.moveChecker(currentPos!!, newPosition!!, true, false)) {
if (selectedPiece!!.moveChecker(
currentPos!!, newPosition!!, performMove = true, king = false)) {
selectedPiece!!.moveTo(newPosition!!.first, newPosition!!.second)
selectedPiece = null
} else {
selectedPiece!!.moveTo(currentPos!!.first, currentPos!!.second)
selectedPiece = null
}
kingInCheck()
whiteKingInCheck()
selectedPiece = null
newPosition = null
currentPos = null
Expand All @@ -211,7 +205,6 @@ class GameScene(private val cont: SceneContainer) : PixelatedScene(512, 512) {
}
markedCells.clear()
error = false

}
}
}
Expand All @@ -227,48 +220,33 @@ var checkedCells = ArrayList<SolidRect>()
* 1. Resets the colors of previously checked cells.
* 2. Clears the list of checked cells.
* 3. Checks each black piece to see if it can move to the king's position.
* 4. If a piece can move to the king's position, the king is in check. The cell of the threatening piece is marked red and added to the list of checked cells.
* 4. If a piece can move to the king's position, the king is in check. The cell of the threatening
* piece is marked red and added to the list of checked cells.
*/
fun kingInCheck(pd:Piece? = null): Boolean {
fun whiteKingInCheck(): Boolean {
// Iterate over all checked cells
for (cell in checkedCells) {
// Decode the position of the cell to get the x and y coordinates
val cx = decodePosition(cell.pos).first
val cy = decodePosition(cell.pos).second
// Change the color of the cell based on the sum of the x and y coordinates
cell.color = if ((cx + cy).isEven) Colors.WHITE else Colors.BLACK

cell.color = if ((cx + cy).isEven) Colors.WHITE else Colors.MEDIUMSEAGREEN
}
// Clear the list of checked cells
checkedCells.clear()
println("cleared checkedCells...")
// Iterate over all pieces
if (pd == null) {
for (piece in pieces) {
// Decode the position of the piece
val piecePos = decodePosition(piece.position)
// If the piece is black
if (piece.color == Colors.BLACK) {
println("Piece: $piecePos, King: $kingPosition")
// Check if the piece can move to the position of the king
if (piece.moveChecker(piecePos, kingPosition, false, true)) {
println("KING IN CHECK! kingPosition: $kingPosition")
// If the piece can move to the position of the king, change the color of the cell the piece is on to red
val b = board[piecePos.second][piecePos.first]
checkedCells.add(b)
b.color = Colors.RED
return true
}
}
}
}
if (pd != null) {
val piecePos = decodePosition(pd.newPosi!!)
if (pd.color == Colors.BLACK) {
println("Piece: $piecePos, King: $kingPosition")
for (piece in pieces) {
// Decode the position of the piece
val piecePos = decodePosition(piece.position)
// If the piece is black
if (piece.color == Colors.BLACK) {
// Check if the piece can move to the position of the king
if (pd.moveChecker(piecePos, kingPosition, false, true)) {
println("KING IN CHECK! kingPosition: $kingPosition")
// If the piece can move to the position of the king, change the color of the cell the piece is on to red
if (piece.moveChecker(piecePos, whiteKingPosition, performMove = false, king = true)) {
println("KING IN CHECK! whiteKingPosition: $whiteKingPosition")
// If the piece can move to the position of the king, change the color of the
// cell the piece is on to red
val b = board[piecePos.second][piecePos.first]
checkedCells.add(b)
b.color = Colors.RED
Expand Down
36 changes: 19 additions & 17 deletions src/commonMain/kotlin/Piece.kt
View file
Original file line number Diff line number Diff line change
Expand Up @@ -54,7 +54,7 @@ class Piece(
private var pieceKind: PieceKind = kind
private lateinit var piece: Image
var position = board[cx][cy].pos
var newPosi: Point? = null
private var newPosi: Point? = null

init {
if (color == Colors.WHITE) {
Expand Down Expand Up @@ -126,7 +126,6 @@ class Piece(
// valid moves
return false
}
val newPosi: Point? = null
if (!king) {
return if (whiteTurn) {
when (pieceKind) {
Expand Down Expand Up @@ -204,9 +203,6 @@ class Piece(
}

return false



}

private fun moveWhiteKing(
Expand All @@ -223,15 +219,20 @@ class Piece(

if (rowDiff <= 1 && colDiff <= 1) {
if (pieceOnNewPos == null) {
if (performMove) whiteTurn = false
kingPosition = decodePosition(board[newPos.first][newPos.second].pos)
if (performMove) {
whiteTurn = false
whiteKingPosition = decodePosition(board[newPos.second][newPos.first].pos)
println("king position: $whiteKingPosition")
}

return true
} else if (pieceOnNewPos.color == Colors.BLACK) {
if (performMove) {
removePiece(pieceOnNewPos)
whiteTurn = false
whiteKingPosition = decodePosition(board[newPos.second][newPos.first].pos)
println("king position: $whiteKingPosition")
}
kingPosition = decodePosition(board[newPos.first][newPos.second].pos)
return true
}
}
Expand All @@ -250,9 +251,16 @@ class Piece(

if (isPawnMoveForward || isInitialPawnMove) {
if (pieceOnNewPos == null) {
if (performMove) whiteTurn = false

// println("legal")
return true
newPosi = board[newPos.second][newPos.first].pos
if (whiteKingInCheck()) {
println("nah")
return false
} else {
if (performMove) whiteTurn = false
return true
}
}
} else if (newPos.second - oldPos.second == 1 &&
((newPos.first - oldPos.first == 1) || (newPos.first - oldPos.first == -1))) {
Expand All @@ -279,21 +287,15 @@ class Piece(
val isInitialPawnMove =
oldPos.second == 6 && newPos.second == 4 && oldPos.first == newPos.first



if (isPawnMoveForward || isInitialPawnMove) {
if (pieceOnNewPos == null) {
if (performMove) whiteTurn = true
newPosi = board[newPos.second][newPos.first].pos
if (kingInCheck(this)){
println("nah")
return false
}
return true
}
} else if (newPos.second - oldPos.second == -1 &&
((newPos.first - oldPos.first == 1) || (newPos.first - oldPos.first == -1))) {
if (pieceOnNewPos != null && pieceOnNewPos.color == Colors.WHITE) {

if (performMove) {
removePiece(pieceOnNewPos)
whiteTurn = true
Expand Down

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