For this assignment, you will write a tic-tac-toe application in HTML and JavaScript, using an HTML...

For this assignment, you will write a tic-tac-toe application in HTML and JavaScript, using an HTML <canvas> tag. The game will be played "hot seat" where players take turns using the same device.

Requirements:

The canvas should be 600px tall and wide, with the gameplay area occupying most of the canvas.
1. The X's and O's may be drawn using polygons or large-font text
2. The grid should be drawn using polygons, specifically long, thin rectangles
Before & between games, the canvas will show an "attract mode" screen showing a blank 3x3 grid in the canvas
Additional HTML components:
1. Two <input> tags, appropriately labeled, where the players can enter their names
2. An appropriately-label HTML <button> that starts the game
Gameplay:
1. Players will be randomly assigned to X and O, with X moving first
2. Players will take turns placing X's and O's by clicking on open grid squares
3. Text written on the canvas will indicate which player's turn by name and X or O, e.g., if it's Joe's turn and Joe is X, the text would read "Joe (X) to move"
4. Invalid moves should not be permitted but no game action is required when a player clicks on an unavailable square
After each player's move, the game will check whether the game has ended
1. After a victory, a line will be drawn through every winning sequence of X's or O's – note that a winning move might make more than one winning sequence – and congratulatory text will appear on the canvas, e.g, if Joe wins, it might read "Joe wins!"
2. If the grid is filled without a winner, the text "tie game" will appear on the canvas
3. In either case, a timer will start - after five seconds, the canvas will return to attract mode with the players' names retained in the input tags

Solutions

Expert Solution

I am pasting the codes with its filenames.

Make sure you make the same filenames :

Put all the files in same folder and the 3 png images in a img folder

file : index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Tic Tac Toe</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <div class="container">
        <canvas id="cvs" width="450" height="450"></canvas>
        <div class="options">
            <h1>Tic Tac Toe</h1>
            <input type="text" id="player-name" placeholder="Enter Name">
            <h2>Play Versus</h2>
            <div class="computer">COMPUTER</div>
            <div class="friend">FRIEND</div>

            <h2>Symbol</h2>
            <div class="x">X</div>
            <div class="o">O</div>

            <div class="play">PLAY</div>
        </div>
        <div class="gameover hide"></div>
    </div>

    <script src="options.js"></script>
    <script src="game.js"></script>
</body>
</html>

file : style.css


@font-face {
    font-family: 'Fascinate Inline';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: local('Fascinate Inline'), local('FascinateInline-Regular'), url(font/jVyR7mzzB3zc-jp6QCAu60poNqIy5grIfA.woff2) format('woff2');
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
  }

.container{
    width: 450px;
    height: 450px;
    display: block;
    margin: 25px auto;
    position: relative;
}

#cvs{
    position: absolute;
    border: 1px solid #000;
}

.options{
    position: absolute;
    width: 450px;
    height: 450px;
}

.options h1{
    text-align: center;
    font-size: 65px;
    font-family: 'Fascinate Inline', cursive;
    color: #f00;
    margin: 30px 0 20px 0;
}

.options h2{
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    text-align: center;
    font-weight: bold;
}

.options div{
    display: inline-block;
}

.options .computer, .x{
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    padding: 5px;
    background-color: #FFF;
    color: #000;
    font-size: 1.5em;
    border-radius: 5px;
    margin-left: 70px;
    width: 150px;
    text-align: center;
    cursor: pointer;
    border: 1px solid #000;
}

.options .friend, .o{
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    padding: 5px;
    background-color: #FFF;
    color: #000;
    font-size: 1.5em;
    border-radius: 5px;
    margin-left: 10px;
    width: 150px;
    text-align: center;
    cursor: pointer;
    border: 1px solid #000;
}

.options .friend:hover, .computer:hover, .x:hover, .o:hover{
    background-color: #011627;
    color: #FFF;
}

.options .play{
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    font-size: 1.5em;
    width: 70px;
    display: block;
    margin: 25px auto;
    border-radius: 5px;
    border: 1px solid #011627;
    text-align: center;
    padding: 10px;
    background-color: #011627;
    color: #FFF;
    cursor: pointer;
    transition: 100ms width ease-in;
}
.options .play:hover{
    width: 110px;
}

.active{
    background-color: #011627 !important;
    color: #FFF !important;
}

.hide{
    display: none;
}

.gameover{
    position: absolute;
    width: 450px;
    height: 450px;
    background-color: rgba(0, 0, 0, 0.95);
}
.gameover h1{
    text-align: center;
    font-size: 50px;
    font-family: 'Fascinate Inline', cursive;
    color: #fff;
    margin: 40px 0 20px 0;
}

.gameover .winner-img{
    display: block;
    margin: 20px auto;
}

.gameover .play{
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    font-size: 1.5em;
    width: 150px;
    display: block;
    margin: 25px auto;
    border-radius: 5px;
    border: 1px solid #fff;
    text-align: center;
    padding: 10px;
    background-color: #fff;
    color: #000;
    cursor: pointer;
    transition: 100ms width ease-in;
}
.gameover .play:hover{
    width: 200px;
}
#player-name{
    border: 3px solid black;
    border-radius: 6px;
    padding: 10px;
    width: 80%;
    margin-left: 35px;
    font-size: 20px;
    text-transform: uppercase;
    font-weight: bold;
}

file : options.js

const options = document.querySelector(".options");

const computerBtn = document.querySelector(".computer");
const friendBtn = document.querySelector(".friend");
const xBtn = document.querySelector(".x");
const oBtn = document.querySelector(".o");
const playBtn = document.querySelector(".play");

const gameOverElement = document.querySelector(".gameover");

const player = new Object;
let OPPONENT;

oBtn.addEventListener("click", function(){
    player.man = "O";
    player.computer = "X";
    player.friend = "X";

    switchActive(xBtn, oBtn);
});

xBtn.addEventListener("click", function(){
    player.man = "X";
    player.computer = "O";
    player.friend = "O";

    switchActive(oBtn, xBtn);
});
 
computerBtn.addEventListener("click", function(){
    OPPONENT = "computer";
    switchActive(friendBtn, computerBtn);
});

friendBtn.addEventListener("click", function(){
    OPPONENT = "friend";
    switchActive(computerBtn, friendBtn);
});

playBtn.addEventListener("click", function(){
    let name=document.querySelector("#player-name").value;
    if( !OPPONENT){
        computerBtn.style.backgroundColor = "red";
        friendBtn.style.backgroundColor = "red";
        return;
    }

    if( !player.man ){
        oBtn.style.backgroundColor = "red";
        xBtn.style.backgroundColor = "red";
        return;
    }
    
    init(player, OPPONENT,name);
    console.log(player)
    options.classList.add("hide");
});

function switchActive(off, on){
    off.classList.remove("active");
    on.classList.add("active");
}

file : game.js

function init(player, OPPONENT,name){
    console.log(name);
    const canvas = document.getElementById("cvs");
    const ctx = canvas.getContext("2d");

    let board = [];
    const COLUMN = 3;
    const ROW = 3;
    const SPACE_SIZE = 150;

    let gameData = new Array(9);
    
    let currentPlayer = player.man;

    const xImage = new Image();
    xImage.src = "img/X.png";

    const oImage = new Image();
    oImage.src = "img/O.png";

    const COMBOS = [
        [0, 1, 2],
        [3, 4, 5],
        [6, 7, 8],
        [0, 3, 6],
        [1, 4, 7],
        [2, 5, 8],
        [0, 4, 8],
        [2, 4, 6]
    ];

    let GAME_OVER = false;
    
    function drawBoard(){
        let id = 0
        for(let i = 0; i < ROW; i++){
            board[i] = [];
            for(let j = 0; j < COLUMN; j++){
                board[i][j] = id;
                id++;

                ctx.strokeStyle = "#000";
                ctx.strokeRect(j * SPACE_SIZE, i * SPACE_SIZE, SPACE_SIZE, SPACE_SIZE);
            }
        }
    }
    drawBoard();

    canvas.addEventListener("click", function(event){
        
        if(GAME_OVER) return;

        let X = event.clientX - canvas.getBoundingClientRect().x;
        let Y = event.clientY - canvas.getBoundingClientRect().y;

        let i = Math.floor(Y/SPACE_SIZE);
        let j = Math.floor(X/SPACE_SIZE);

        let id = board[i][j];

        if(gameData[id]) return;

        gameData[id] = currentPlayer;
        
        drawOnBoard(currentPlayer, i, j);

        if(isWinner(gameData, currentPlayer)){
            showGameOver(currentPlayer);
            GAME_OVER = true;
            return;
        }

        if(isTie(gameData)){
            showGameOver("tie");
            GAME_OVER = true;
            return;
        }

        if( OPPONENT == "computer"){
            let id = minimax( gameData, player.computer ).id;

            gameData[id] = player.computer;
            
            let space = getIJ(id);

            drawOnBoard(player.computer, space.i, space.j);

            if(isWinner(gameData, player.computer)){
                showGameOver(player.computer);
                GAME_OVER = true;
                return;
            }

            if(isTie(gameData)){
                showGameOver("tie");
                GAME_OVER = true;
                return;
            }
        }else{
            currentPlayer = currentPlayer == player.man ? player.friend : player.man;
        }

    });

    function minimax(gameData, PLAYER){
        if( isWinner(gameData, player.computer) ) return { evaluation : +10 };
        if( isWinner(gameData, player.man)      ) return { evaluation : -10 };
        if( isTie(gameData)                     ) return { evaluation : 0 };

        let EMPTY_SPACES = getEmptySpaces(gameData);
        let moves = [];

        for( let i = 0; i < EMPTY_SPACES.length; i++){
            let id = EMPTY_SPACES[i];
            let backup = gameData[id];
            gameData[id] = PLAYER;
            let move = {};
            move.id = id;
            if( PLAYER == player.computer){
                move.evaluation = minimax(gameData, player.man).evaluation;
            }else{
                move.evaluation = minimax(gameData, player.computer).evaluation;
            }
            gameData[id] = backup;
            moves.push(move);
        }

        let bestMove;

        if(PLAYER == player.computer){
            let bestEvaluation = -Infinity;
            for(let i = 0; i < moves.length; i++){
                if( moves[i].evaluation > bestEvaluation ){
                    bestEvaluation = moves[i].evaluation;
                    bestMove = moves[i];
                }
            }
        }else{
            let bestEvaluation = +Infinity;
            for(let i = 0; i < moves.length; i++){
                if( moves[i].evaluation < bestEvaluation ){
                    bestEvaluation = moves[i].evaluation;
                    bestMove = moves[i];
                }
            }
        }

        return bestMove;
    }

    function getEmptySpaces(gameData){
        let EMPTY = [];

        for( let id = 0; id < gameData.length; id++){
            if(!gameData[id]) EMPTY.push(id);
        }

        return EMPTY;
    }

    function getIJ(id){
        for(let i = 0; i < board.length; i++){
            for(let j = 0; j < board[i].length; j++){
                if(board[i][j] == id) return { i : i, j : j}
            }
        }
    }

    function isWinner(gameData, player){
        for(let i = 0; i < COMBOS.length; i++){
            let won = true;

            for(let j = 0; j < COMBOS[i].length; j++){
                let id = COMBOS[i][j];
                won = gameData[id] == player && won;
            }

            if(won){
                return true;
            }
        }
        return false;
    }

    function isTie(gameData){
        let isBoardFill = true;
        for(let i = 0; i < gameData.length; i++){
            isBoardFill = gameData[i] && isBoardFill;
        }
        if(isBoardFill){
            return true;
        }
        return false;
    }
    function showGameOver(player){
        console.log(currentPlayer,name,player)
        let str=name;
        if(currentPlayer!==player){
            str="Player 2";
        }
        let message = player == "tie" ? "Oops No Winner" : `The Winner is ${str}`;
        let imgSrc = `img/${player}.png`;

        gameOverElement.innerHTML = `
            <h1>${message}</1>
            <img class="winner-img" src=${imgSrc} </img>
            <div class="play" onclick="location.reload()">Play Again!</div>
        `;

        gameOverElement.classList.remove("hide");
    }
    function drawOnBoard(player, i, j){
        let img = player == "X" ? xImage : oImage;
        ctx.drawImage(img, j * SPACE_SIZE, i * SPACE_SIZE);
    }
}

'X.png', 'O.png' and "tie.png" (place in "img" folder)

venereology answered 1 year ago

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