基于JavaScript實現十五拼圖代碼實例
顧名思義，十五拼圖就是將游戲畫面中的數字從上到下，從左到右按順序從1到15排列下來，看起來很簡單，但是玩起來不容易。
css代碼
body { font-family: cursive; font-size: 14pt; text-align: center;}#puzzlearea { height: 400px; margin: 0 auto; position: relative; width: 400px;}.highlight { border-color: red; cursor: pointer;}.puzzletile { background-image: url('../background.jpg'); border: 5px solid black; position: absolute;}.highlight, #output { color: red;}.puzzletile, #output { font-size: 40pt;}
html代碼
<!DOCTYPE html><html lang='en'><head> <meta charset='UTF-8'> <title>CSE 154 Fifteen Puzzle</title> <!-- your files that you will write --> <link href='http://www.gepszalag.com/bcjs/css/fifteen.css' rel='external nofollow' type='text/css' rel='stylesheet'/> <script src='http://www.gepszalag.com/bcjs/js/fifteen.js' type='text/javascript'></script></head><body><h1>Fifteen Puzzle</h1><p> The goal of the fifteen puzzle is to un-jumble its fifteen squares by repeatedly making moves that slide squares into the empty space. How quickly can you solve it?</p><div id='puzzlearea'> <!-- this area holds the actual fifteen puzzle pieces add to it as you need to --></div><p id='controls'> <button id='shufflebutton'>Shuffle</button></p><div id='output'></div><p> American puzzle author and mathematician Sam Loyd is often falsely credited with creating the puzzle; indeed, Loyd claimed from 1891 until his death in 1911 that he invented it. The puzzle was actually created around 1874 by Noyes Palmer Chapman, a postmaster in Canastota, New York.</p></body></html>
JavaScript代碼
(function () { 'use strict'; let NUM = 4; //拼圖的行列數 the number of rows/cols in the puzzle let spaceRow = 3; // 空白圖塊所在行 let spaceColumn = 3; // 空白圖塊所在列 let WIDTH = 100; // the pixel width/height of each tile // gets everything set when the window has loaded window.onload = function () { setSize(); document.getElementById('select').onchange = changeSize; document.getElementById('shufflebutton').onclick = shuffle; createSquares(); }; // add a drop-down list to select difficulty level // 設置下拉列表 默認選中 option4 function setSize() { var select = document.createElement('select'); select.id = 'select'; for (var i = 3; i < 7; i++) { var option = document.createElement('option'); option.innerHTML = i + ' * ' + i; option.value = i; option. + i; select.appendChild(option); } document.getElementById('controls').appendChild(select); document.getElementById('option4').selected = 'selected'; } function changeSize() { NUM = this.value; spaceRow = this.value - 1; spaceColumn = this.value - 1; WIDTH = parseInt(400 / this.value); var puzzlearea = document.getElementById('puzzlearea'); while (puzzlearea.contains(document.querySelector('.puzzletile'))) { puzzlearea.removeChild(document.querySelector('.puzzletile')); } createSquares(); } // creates 15 puzzle tiles and sets them to their initial position function createSquares() { for (var i = 1; i < NUM * NUM; i++) { var div = document.createElement('div'); div.className = 'puzzletile'; div.innerHTML = i; var row = Math.floor((i - 1) / NUM); var column = (i - 1) % NUM; var x = column * -1 * WIDTH + 'px'; var y = row * -1 * WIDTH + 'px'; // 減去邊框的寬度 并且寬高相等 div.style.height = WIDTH - 10 + 'px'; div.style.width = div.style.height; // 設置background 的 position div.style.backgroundPosition = x + ' ' + y; // 為每個拼圖添加ID div. + row + '_' + column; // 設置水平和垂直方向的偏移量 div.style.top = row * WIDTH + 'px'; div.style.left = column * WIDTH + 'px'; setEvents(div); document.getElementById('puzzlearea').appendChild(div); } } // shuffles puzzle tiles for 1000 times function shuffle() { // 實現Shuffle算法 for (let j = 0; j < 1000; j++) { let neigbors = []; // 將所有的拼圖 存儲到 allPuzzles中 let allPuzzles = document.getElementsByClassName('puzzletile'); // 將與空白圖塊相鄰的拼圖 存儲到數組neigbors中 for (let i = 0; i < allPuzzles.length; i++) { // 判斷拼圖是否可以移動 if (moveable(allPuzzles[i]))neigbors.push(allPuzzles[i]); } // 得到一個隨機的索引 let ranNum = getRandomIntInclusive(0, neigbors.length - 1); // 獲取需要移動的拼圖移動之前的偏移量 let tempTop = neigbors[ranNum].style.top; let tempLeft = neigbors[ranNum].style.left; // 將拼圖移動到空白圖塊處 neigbors[ranNum].style.top = spaceRow * WIDTH + 'px'; neigbors[ranNum].style.left = spaceColumn * WIDTH + 'px'; neigbors[ranNum]. + spaceRow + '_' + spaceColumn; // 更改空白圖塊的位置 spaceRow = parseInt(tempTop) / WIDTH; spaceColumn = parseInt(tempLeft) / WIDTH; } } // 獲取指定區間的隨機數 function getRandomIntInclusive(min, max) { min = Math.ceil(min); max = Math.floor(max); return Math.floor(Math.random() * (max - min + 1)) + min; } // sets up events for all puzzle tiles function setEvents(div) { div.onmouseover = function () { if (moveable(this)) { this.classList.add('highlight'); // when mouse over, adds class 'highlight' } }; div.onmouseout = function () { // when mouse out, removes class 'highlight' if (moveable(this)) { this.classList.remove('highlight'); // when mouse out, remove class 'highlight' } }; div.onclick = helper; } // a helper function for function 'makeAMove' // displays 'congratulations' if the player wins function helper() { if (moveable(this)) { makeAMove(this); if (win()) { document.getElementById('output').innerHTML = 'Congratulations! You win!'; } else { document.getElementById('output').innerHTML = ''; } } } // make one move for the given tile function makeAMove(div) { div. + spaceRow + '_' + spaceColumn; var divRow = parseInt(div.style.top) / WIDTH; var divColumn = parseInt(div.style.left) / WIDTH; div.style.top = spaceRow * WIDTH + 'px'; div.style.left = spaceColumn * WIDTH + 'px'; spaceRow = divRow; spaceColumn = divColumn; } // return true if the given tile is moveable function moveable(div) { var divRow = parseInt(div.style.top) / WIDTH; var divColumn = parseInt(div.style.left) / WIDTH; if (spaceRow == divRow) { return Math.abs(spaceColumn - divColumn) == 1; } else if (spaceColumn == divColumn) { return Math.abs(spaceRow - divRow) == 1; } else { return false; } } // return true if all tiles are at their original positions function win() { var tiles = document.querySelectorAll('.puzzletile'); for (var i = 0; i < tiles.length; i++) { var row = Math.floor(i / NUM); var column = i % NUM; if (tiles[i].id != 'square_' + row + '_' + column) { console.log(tiles[i].id); return false; } } return true; }})();
最后的效果
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持好吧啦網。
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