js实现简单滑块拼图游戏

<body>
<div id="game" style="position:relative"></div>
</body>
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/**
* js配置
*/
var config = {
width: 300,
height: 300,
img: "./img/fj.jpg",
gameDom: document.getElementById("game"),
row: 3, //3行
col: 3 //3列
}

//经过计算的一些数据
var computed = {
num: config.col * config.row, //方块数量
w: config.width / config.col, //每个小方块的宽度
h: config.height / config.row //每个小方块的高度
}
//方块对象的数组,每个对象中记录了方块的正确坐标、当前坐标、dom元素、以及一些实用方法
var blocks;

/**
* 为全局变量blocks赋值
*/
function setBlocks() {
blocks = [];
var points = getPointsArray(); //该数组用于设置每个方块的正确坐标
var shuffledPoints = [...points]; //复制后的数组用于在洗牌后设置方块的当前坐标
shuffle(shuffledPoints);//洗牌
for (var i = 0; i < points.length; i++) {
const point = points[i];
//创建方块对象
var b = {
left: point.left,
top: point.top,
curLeft: shuffledPoints[i].left,
curTop: shuffledPoints[i].top,
dom: document.createElement("div"),
update() {
this.dom.style.transition = "all .5s";
this.dom.style.left = this.curLeft + "px";
this.dom.style.top = this.curTop + "px";
},
isCorrect() {
return this.curTop === this.top && this.curLeft === this.left;
},
isEmpty: i === points.length - 1 //是否应该是空白方块
}
b.dom.style.width = computed.w + "px";
b.dom.style.height = computed.h + "px";
b.dom.style.position = "absolute";
b.dom.style.border = "1px solid #fff";
b.dom.style.boxSizing = "border-box";
b.dom.style.background = `url("${config.img}")`;
b.dom.style.cursor = "pointer";
b.dom.style.backgroundPosition = `-${b.left}px -${b.top}px`;
b.dom.block = b;
b.dom.onclick = function () {
switchBlock(this.block);
}
b.update();
blocks.push(b);
}
}

/**
* 生成游戏
*/
function generateGame() {
config.gameDom.style.width = config.width + "px";
config.gameDom.style.height = config.height + "px";
config.gameDom.style.border = "2px solid #8c8c8c";
config.gameDom.innerHTML = ""; //清空区域
for (const item of blocks) {
if (!item.isEmpty) {
config.gameDom.appendChild(item.dom);
}
}
}

/**
* 获得所有方块的可取到的坐标数组
*/
function getPointsArray() {
var arr = [];
for (var i = 0; i < computed.num; i++) {
arr.push({
left: (i % config.col) * computed.w,
top: parseInt(i / config.col) * computed.h
});
}
return arr;
}

 

/**
* 将某个block对象的坐标,与空坐标交换
* @param {*} block
*/
function switchBlock(block) {
//找到空坐标
var emptyBlock = blocks.find(b=>b.isEmpty);
//判断是否相邻
if(Math.abs(block.curLeft - emptyBlock.curLeft) +
Math.abs(block.curTop - emptyBlock.curTop) !== computed.w){
return;
}
//交换
var bLeft = block.curLeft;
var bTop = block.curTop;
block.curLeft = emptyBlock.curLeft;
block.curTop = emptyBlock.curTop;
emptyBlock.curLeft = bLeft;
emptyBlock.curTop = bTop;
block.update();
emptyBlock.update();
if(isWin()){
setTimeout(() => {
alert("游戏胜利")
}, 500);
}
}

/**
* 数组洗牌
* @param {*} arr
*/
function shuffle(arr) {
for (var i = 0; i < arr.length - 1; i++) {
var targetIndex = getRandom(0, arr.length - 1);
var temp = arr[i];
arr[i] = arr[targetIndex];
arr[targetIndex] = temp;
}
}

function getRandom(min, max) {
var dec = max - min;
return Math.floor(Math.random() * dec + min);
}

/**
* 游戏是否胜利
*/
function isWin() {
for (const b of blocks) {
if (!b.isCorrect()) {
return false;
}
}
return true;
}

setBlocks();
generateGame();

 

posted @ 2019-10-12 13:37  水至清明  阅读(223)  评论(0编辑  收藏