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Chess.html
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Chess.html
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<!DOCTYPE html>
<html>
<head>
<style>
canvas {
border: 3px solid #000;
background: url('data:image/gif;base64,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');
width: 100%;
aspect-ratio: 1 / 1;
overflow: hidden;
}
</style>
</head>
<body>
<canvas id="canvas"></canvas>
<script>
const d = document.getElementById("canvas");
const c = d.getContext("2d");
class Piece{
constructor(color, size){
this.color = color;
this.size = size;
}
isOnBoard(x, y){
return w.field[y][x].figure !== null;
}
isSameColor(x, y){
return w.field[y][x].figure.piece.color === this.color;
}
}
class Pawn{
constructor(color, size){
this.piece = new Piece(color,size);
}
possibleMoves(x, y){
let result = [];
if (this.piece.color === w.black && y < 7){
if (x - 1 >= 0 && this.piece.isOnBoard(x - 1, y + 1) && !this.piece.isSameColor(x - 1, y + 1)){
result.push({x: x - 1, y: y + 1 });
}
if (x + 1 < 8 && this.piece.isOnBoard(x + 1, y + 1) && !this.piece.isSameColor(x + 1, y + 1)){
result.push({x: x + 1, y: y + 1});
}
if (!this.piece.isOnBoard(x, y + 1)){
result.push({x: x, y: y + 1});
if (y === 1 && !this.piece.isOnBoard(x, y + 2)){
result.push({x: x, y: y + 2});
}
}
}
if (this.piece.color === w.white && y > 0){
if (x - 1 >= 0 && this.piece.isOnBoard(x - 1, y - 1) && !this.piece.isSameColor(x - 1, y - 1)){
result.push({x: x - 1, y: y - 1});
}
if (x + 1 < 8 && this.piece.isOnBoard(x + 1, y - 1) && !this.piece.isSameColor(x + 1, y - 1)){
result.push({x: x + 1, y: y - 1});
}
if (!this.piece.isOnBoard(x, y - 1)){
result.push({x: x, y: y - 1});
if (y === 6 && !this.piece.isOnBoard(x, y - 2)){
result.push({x: x, y: y - 2});
}
}
}
return result;
}
display(x, y, scale){
c.fillStyle = this.piece.color;
c.beginPath();
c.arc((x + this.piece.size / 8 * 5) * scale,
(y + this.piece.size / 8 * 5) * scale,
(this.piece.size / 2.5) * scale,
0,
2 * Math.PI);
c.fill();
}
}
class Rook{
constructor(color, size){
this.piece = new Piece(color, size);
}
possibleMoves(x, y){
let result = [];
function possibleMovesInLine(xIndex, yIndex, testFunction, piece){
for (let i = 1; testFunction(i); i++){
let position = {
x: xIndex(i),
y: yIndex(i)
};
if (piece.isOnBoard(xIndex(i), yIndex(i))){
if(!piece.isSameColor(xIndex(i), yIndex(i))){
result.push(position);
}
break;
}
result.push(position);
}
}
possibleMovesInLine(
i => x + i,
i => y,
i => x + i < 8,
this.piece
);
possibleMovesInLine(
i => x - i,
i => y,
i => x - i >= 0,
this.piece
);
possibleMovesInLine(
i => x,
i => y + i,
i => y + i < 8,
this.piece
);
possibleMovesInLine(
i => x,
i => y - i,
i => y - i >= 0,
this.piece
);
return result;
}
display(x, y, scale){
c.fillStyle = this.piece.color;
c.fillRect((x + this.piece.size / 8) * scale,
(y + this.piece.size / 8) * scale,
this.piece.size * scale,
this.piece.size * scale);
}
}
1,2
class Knight{
constructor(color, size){
this.piece = new Piece(color, size);
}
possibleMoves(x, y){
let result = [];
function pieceCheck(x, y, piece) {
if(!piece.isOnBoard(x, y)
|| !piece.isSameColor(x, y)){
result.push({x: x, y: y});
}
};
if (x + 1 < 8){
if (y + 2 < 8){
pieceCheck(x + 1, y + 2, this.piece);
}
if (y - 2 >= 0){
pieceCheck(x + 1, y - 2, this.piece);
}
}
if (x - 1 >= 0){
if (y + 2 < 8){
pieceCheck(x - 1, y + 2, this.piece);
}
if (y - 2 >= 0){
pieceCheck(x - 1, y - 2, this.piece);
}
}
if (x + 2 < 8){
if(y + 1 < 8){
pieceCheck(x + 2, y + 1, this.piece);
}
if(y - 1 >= 0){
pieceCheck(x + 2, y - 1, this.piece);
}
}
if (x - 2 >= 0){
if(y + 1 < 8){
pieceCheck(x - 2, y + 1, this.piece);
}
if(y - 1 >= 0){
pieceCheck(x - 2, y - 1, this.piece);
}
}
return result;
}
display(x, y, scale){
c.fillStyle = this.piece.color;
c.fillRect((x + this.piece.size / 2) * scale,
(y + this.piece.size / 8) * scale,
this.piece.size / 4 * scale,
this.piece.size * scale);
c.fillRect((x + this.piece.size / 8) * scale,
(y + this.piece.size / 8 * 3) * scale,
this.piece.size * scale,
this.piece.size / 8 * scale);
c.fillRect((x + this.piece.size / 8) * scale,
(y + this.piece.size / 4 * 3) * scale,
this.piece.size * scale,
this.piece.size / 8 * scale);
}
}
class Bishop{
constructor(color, size){
this.piece = new Piece(color,size);
}
possibleMoves(x, y){
let result = [];
function possibleMovesInLine(xIndex, yIndex, testFunction, piece){
for(let i = 1; testFunction(i); i++){
let position = {
x: xIndex(i),
y: yIndex(i)
}
if(piece.isOnBoard(xIndex(i), yIndex(i))){
if(!piece.isSameColor(xIndex(i), yIndex(i))){
result.push(position);
}
break;
}
result.push(position);
}
}
possibleMovesInLine(
i => x + i,
i => y + i,
i => x + i < 8 && y + i < 8,
this.piece
);
possibleMovesInLine(
i => x - i,
i => y - i,
i => x - i >= 0 && y - i >= 0,
this.piece
);
possibleMovesInLine(
i => x + i,
i => y - i,
i => x + i < 8 && y - i >= 0,
this.piece
);
possibleMovesInLine(
i => x - i,
i => y + i,
i => x - i >= 0 && y + i < 8,
this.piece
);
return result;
}
display(x, y, scale){
c.fillStyle = this.piece.color;
function drawCircle(x, y, size){
c.beginPath();
c.arc(
x * scale,
y * scale,
(size / 4) * scale,
0,
2 * Math.PI);
c.fill();
}
drawCircle(x + 35, y + 35, this.piece.size);
drawCircle(x + 35, y + 65, this.piece.size);
drawCircle(x + 65, y + 65, this.piece.size);
drawCircle(x + 65, y + 35, this.piece.size);
}
}
class Queen{
constructor(color, size){
this.piece = new Piece(color, size);
}
possibleMoves(x, y){
let result = [];
function possibleMovesInLine(xIndex, yIndex, testFunction, piece){
for(let i = 1; testFunction(i); i++){
let position = {
x: xIndex(i),
y: yIndex(i)
}
if(piece.isOnBoard(xIndex(i), yIndex(i))){
if(!piece.isSameColor(xIndex(i), yIndex(i))){
result.push(position);
}
break;
}
result.push(position);
}
}
possibleMovesInLine(
i => x + i,
i => y + i,
i => x + i < 8 && y + i < 8,
this.piece
);
possibleMovesInLine(
i => x - i,
i => y - i,
i => x - i >= 0 && y - i >= 0,
this.piece
);
possibleMovesInLine(
i => x + i,
i => y - i,
i => x + i < 8 && y - i >= 0,
this.piece
);
possibleMovesInLine(
i => x - i,
i => y + i,
i => x - i >= 0 && y + i < 8,
this.piece
);
possibleMovesInLine(
i => x + i,
i => y,
i => x + i < 8,
this.piece
);
possibleMovesInLine(
i => x - i,
i => y,
i => x - i >= 0,
this.piece
);
possibleMovesInLine(
i => x,
i => y + i,
i => y + i < 8,
this.piece
);
possibleMovesInLine(
i => x,
i => y - i,
i => y - i >= 0,
this.piece
);
return result;
}
display(x, y, scale){
c.fillStyle = this.piece.color;
c.fillRect((x + this.piece.size / 8) * scale,
(y + this.piece.size / 16 * 9) * scale,
this.piece.size * scale,
this.piece.size / 8 * scale);
c.fillRect((x + this.piece.size / 16 * 9) * scale,
(y + this.piece.size / 8) * scale,
this.piece.size / 8 * scale,
this.piece.size * scale);
c.beginPath();
c.arc((x + this.piece.size / 8 * 5) * scale,
(y + this.piece.size / 8 * 5) * scale,
(this.piece.size / 3) * scale,
0,
2 * Math.PI);
c.fill();
}
}
class King{
constructor(color, size){
this.piece = new Piece(color, size);
}
possibleMoves(x, y){
let result = [];
function pieceCheck(x, y, piece) {
if(!piece.isOnBoard(x, y)
|| !piece.isSameColor(x, y)){
result.push({x: x, y: y});
}
};
if(x + 1 < 8){
if(y + 1 < 8){
pieceCheck(x + 1, y + 1, this.piece);
}
if(y - 1 >= 0){
pieceCheck(x + 1, y - 1, this.piece);
}
pieceCheck(x + 1, y, this.piece);
}
if((x - 1 >= 0)){
if(y + 1 < 8){
pieceCheck(x - 1, y + 1, this.piece);
}
if(y - 1 >= 0){
pieceCheck(x - 1, y - 1, this.piece);
}
pieceCheck(x - 1, y, this.piece);
}
if(y + 1 < 8){
pieceCheck(x, y + 1, this.piece);
}
if(y - 1 >= 0){
pieceCheck(x, y - 1, this.piece);
}
return result;
}
display(x, y, scale){
c.fillStyle = this.piece.color;
c.fillRect((x + this.piece.size / 8 * 3) * scale,
(y + this.piece.size / 32 * 3) * scale,
this.piece.size / 2 * scale,
this.piece.size / 16 * 17 * scale);
c.fillRect((x + this.piece.size / 32 * 3) * scale,
(y + this.piece.size / 8 * 3) * scale,
this.piece.size / 16 * 17 * scale,
this.piece.size / 2 * scale);
}
}
class Tile{
constructor(xNum,yNum,figure) {
this.x = xNum * 100;
this.y = yNum * 100;
this.figure = figure;
if (
(xNum % 2 === 0 && yNum % 2 === 0) ||
(xNum % 2 === 1 && yNum % 2 === 1)){
this.color = "white";
}else{
this.color = "black";
}
}
display(scale) {
c.fillStyle = this.color;
c.fillRect(
this.x * scale,
this.y * scale,
w.squareWidth * scale,
w.squareHeight * scale);
if (this.figure != null){
this.figure.display(this.x,
this.y,
scale);
}
}
}
class World{
constructor() {
this.field = [];
this.moves = [];
this.maxX = 800;
this.maxY = 800;
this.figureSize = 80;
this.squareWidth = this.maxX / 8;
this.squareHeight = this.maxY / 8;
this.scaleValue = d.getBoundingClientRect().width / this.maxX;
this.black = "#4d2900";
this.white = "#fcffa6";
this.activePiece = {x: NaN, y: NaN, color: this.white};
this.fillField();
}// fills the field with squares and their figures
backRow(color, y){
return [new Tile(0, y, new Rook(color, this.figureSize)),
new Tile(1, y, new Knight(color, this.figureSize)),
new Tile(2, y, new Bishop(color, this.figureSize)),
new Tile(3, y, new Queen(color, this.figureSize)),
new Tile(4, y, new King(color, this.figureSize)),
new Tile(5, y, new Bishop(color, this.figureSize)),
new Tile(6, y, new Knight(color, this.figureSize)),
new Tile(7, y, new Rook(color, this.figureSize))];
}
pawnRow(color, y){
let row = []
for (let x = 0; x < 8; x++){
row.push(new Tile(x, y, new Pawn(color, this.figureSize)));
}
return row;
}
emptyRow(y){
let row = []
for (let x = 0; x < 8; x++){
row.push(new Tile(x, y, null));
}
return row;
}
fillField(){
for (let y = 0; y < 8; y++){
// 0 = empty, 1 = pawn 2 = rook 3 = horse 4 = priest 5 = queen 6 = King
switch(y){
case 0:
this.field[y] = this.backRow(this.black, y);
break;
case 1:
this.field[y] = this.pawnRow(this.black, y);
break;
case 6:
this.field[y] = this.pawnRow(this.white, y);
break;
case 7:
this.field[y] = this.backRow(this.white,y);
break;
default:
this.field[y] = this.emptyRow(y);
}
}
}
gameOver(color){
console.log("The King Has Been Slain");
c.clearRect(
0,
0,
d.clientWidth,
d.clientHeight
);
c.font = `${80 * this.scaleValue}px serif`;
c.strokeText(`WINNER: ${color}!`, 10 * this.scaleValue, 200 * this.scaleValue);
haveAStroke();
}
movePiece(oldX, oldY, newX, newY){
if(this.field[newY][newX].figure != null && this.field[newY][newX].figure.constructor.name === "King"){
this.gameOver(this.field[oldY][oldX].figure.piece.color);
}
if(this.field[oldY][oldX].figure.constructor.name === "Pawn" && newY === 7 || newY === 0){
this.field[newY][newX].figure = new Queen(this.field[oldY][oldX].figure.piece.color, this.field[oldY][oldX].figure.piece.size);
}else{
this.field[newY][newX].figure = this.field[oldY][oldX].figure;
}
this.field[newY][newX].display(this.scaleValue);
this.field[oldY][oldX].figure = null;
this.field[oldY][oldX].display(this.scaleValue);
}
showPossibleMoves(){
for (let i = 0; i < this.moves.length; i++){
c.fillStyle = "green";
c.beginPath();
c.arc(
(this.moves[i].x * 100 + 50) * this.scaleValue,
(this.moves[i].y * 100 + 50) * this.scaleValue,
(this.figureSize / 16 * 9) * this.scaleValue,
0,
2 * Math.PI);
c.fill();
if(this.field[this.moves[i].y][this.moves[i].x].figure !== null){
this.field[this.moves[i].y][this.moves[i].x].figure.display(this.moves[i].x * 100, this.moves[i].y * 100, this.scaleValue);
}
}
}
pieceMovement(worldX, worldY){
let x = Math.trunc((worldX / this.scaleValue) / 100);
let y = Math.trunc((worldY / this.scaleValue) / 100);
if (x < 8 && x >= 0 && y < 8 && y >= 0){
for (let n = 0; n < this.moves.length; n++){
if(this.moves[n].x === x && this.moves[n].y === y){
this.movePiece(this.activePiece.x, this.activePiece.y, x, y);
if(this.activePiece.color === this.white){
this.activePiece.color = this.black;
}else if(this.activePiece.color === this.black){
this.activePiece.color = this.white;
}
}
}
this.displayWorld();
if (this.field[y][x].figure !== null && this.field[y][x].figure.piece.color === this.activePiece.color){
this.activePiece.x = x;
this.activePiece.y = y;
this.moves = this.field[y][x].figure.possibleMoves(x, y);
this.showPossibleMoves();
}else{
this.moves = [];
}
}
}
displayWorld(){
for (let x = 0; x < 8; x++){
for (let y = 0; y < 8; y++){
this.field[y][x].display(this.scaleValue);
}
}
}
}
const w = new World();
function game() {setTimeout(() => {
// clears the screen
requestAnimationFrame(game);
}, 1)}
function main() {
// sets canvas width and height
d.width = d.clientWidth;
d.height = d.clientHeight;
c.font = `${30 * w.scaleValue}px Arial`;
w.displayWorld();
canvas.addEventListener(
'pointerdown',
e => {w.pieceMovement(e.offsetX, e.offsetY);}
);
game();
}
main();
</script>
</body>
</html>