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怎么使用js编写实现拼图游戏

发布时间:2022-07-13 10:13:27 来源:亿速云 阅读:265 作者:iii 栏目:开发技术

这篇文章主要讲解了“怎么使用js编写实现拼图游戏”,文中的讲解内容简单清晰,易于学习与理解,下面请大家跟着小编的思路慢慢深入,一起来研究和学习“怎么使用js编写实现拼图游戏”吧!

目标

使用原生js编写一个拼图游戏,我这里写了两种拼图的方法。一种是拖拽拼图,一种是经典的九宫格拼图,可以自定义参数设置游戏难度

先看看截图效果

拖拽模式(拖拽图片切换图片)

怎么使用js编写实现拼图游戏

点击模式(点击图片与空白区域切换位置)

怎么使用js编写实现拼图游戏

不多说,直接上代码

css

#canvasBox{
        margin: 0 auto;
        position: fixed;
        border: 2px solid #f00;
        overflow: hidden;
    }
    .item{
        display: inline-block;
        border: 1px solid #f00;
        position: absolute;
        top: 0;
        left: 0;
        transition: 0.1s;
 }

html

<div >
        <button onclick="setGame('block', 'none')">拖拽模式</button>
        <button onclick="setGame('none', 'block')" >点击模式</button>
    </div>
    
    <div id="canvasBox"></div>
<div id="canvasBox2"></div>

javascript

/*
             * @title JigsawGame 拼图游戏
             * @params obj Object 游戏参数
             * {
             *     @param Id String 容器id
             *     @param imgUrl String 图片路径
             *     @param level Number 游戏难度 简单:1 || 普通:2 || 困难:3
             *     @param gameType Number 游戏类型  拖动版本:1 || 点击版本:2
             * }
             * @author beideng
             */
            function JigsawGame(obj){

                // 初始化容器
                this.Id = document.getElementById(obj.Id);

                // 初始化图片
                this.img = new Image();
                this.img.src = obj.imgUrl;

                // 容器最大宽度
                this.windowWidth = document.body.clientWidth;
                this.maxWidth = this.windowWidth > 750 ? 750 : (this.windowWidth * 0.9);

                // 设置容器宽高
                this.Id.style.width = this.maxWidth + "px";
                this.Id.style.height = this.maxWidth + "px";
                this.Id.style.left = (this.windowWidth - this.maxWidth)/2 + "px";
                this.Id.style.top = 50 + "px";

                // 获取容器范围
                this.boxOffsetY = parseFloat(this.Id.style.top);
                this.boxOffsetX = parseFloat( this.Id.style.left);

                // 关卡(简单:1 || 普通:2 || 困难:3)
                if(obj.level == 1 || obj.level == 2 || obj.level == 3 ){
                    this.Level = obj.level;
                }else{
                    this.level = 1;    
                }

                // 难度
                var diffArr = [3, 4, 5];
                this.Diff= diffArr[this.Level-1];

                // canvas宽高
                this.cW = this.maxWidth/ this.Diff;
                this.cH = this.maxWidth/ this.Diff;

                // 记录的小方块个数
                this.number = 0;
                // 正确的数组
                this.numberArr = [];
                // 存储小方块的中心点坐标
                this.centerXY = [];

                /*
                 * 获取游戏类型
                 */
                this.gameType = obj.gameType || 1;

                // 记录最后一个元素的标记
                this.lastElement = {
                    sign: 0,
                    left: 0,
                    top: 0,
                    Id: obj.Id + 1
                };

                // 初始化
                this.Init();

            }

            /*
             * 操作方法 *
             */
            JigsawGame.prototype = {
                
                /*
                 * @method 初始化 
                 */
                Init: function(){

                    var that = this;

                    this.img.onload = function(){

                        // 格子宽高
                        var LevelW = that.img.width/that.Diff;
                        var LevelH = that.img.height/that.Diff;

                        for(var i = 0 ; i < that.Diff; i++){
                            for(var j = 0 ; j < that.Diff; j++){
                                // 初始化小方块
                                that.initCube(i, j, LevelW, LevelH);
                            }
                        }

                        // 打乱小方块
                        that.upsetElement();

                        // 游戏类型判断
                        if(that.gameType == 1){
                            // 监听拖动
                            that.Id.addEventListener("mousedown",function(event){
                                that.mouseDown(event);
                            }, false);
                        }else{
                            
                            // 获取空白小方块坐标
                            that.getLastElement();

                            // 监听点击
                            that.Id.addEventListener("click",function(event){
                                that.mouseClick(event);
                            }, false);
                        }

                    }

                },

                /*
                 * @method 初始化小方块 
                 * @param i Number 循环值
                 * @param j Number 循环值
                 * @param j LevelW 小方块宽
                 * @param j LevelH 小方块高
                 */
                initCube: function(i, j, LevelW, LevelH){

                    // 创建一个小方块
                    var item = document.createElement("div"),
                        cW = this.cW,
                        cH = this.cH;
                    
                    item.className = "item";
                    item.setAttribute("data-index", this.number);
                    item.style.width = cW + "px";
                    item.style.height = cH + "px";
                    item.style.left = i * cW + "px";
                    item.style.top = j * cH + "px";
                    item.innerHTML = "<canvas class='' width='"+ cW +"' height='"+ cH +"'></canvas>";
                    this.Id.appendChild(item);

                    var canvas = item.querySelector("canvas");
                    var ctx = canvas.getContext("2d");
                    
                    /*
                     * 当游戏为点击类型时
                     * 去掉最后一个小方块里的图片
                     * 且记录当前元素的坐标以及编号
                     */ 
                    if(this.gameType != 1 && j == this.Diff-1 && i == this.Diff-1){
                        this.lastElement.sign = this.number;
                        item.id = this.lastElement.Id;

                    }else{
                        ctx.drawImage(this.img, i * LevelW, j * LevelH , LevelW, LevelH, 0 , 0, cW, cH)
                    }
                    
                    // 每添加一个就压入一次到数组
                    this.numberArr.push({
                        x: i*cW +"px" ,
                        y: j*cH +"px"
                    });
                    this.number++;

                    // 压入初始中心点
                    this.centerXY.push({
                        x: i*cW + cW / 2,
                        y: j*cH + cH / 2
                    });

                    
                },

                /*
                 * @method 悬停拖住小方块
                 * @param event Object 鼠标对象
                 */
                mouseDown: function(event){
                    console.log(event)

                     var event = event || window.event;

                     var that = this;

          var target = event.target || event.srcElement;

          // 保证拖动的是想要的元素
          if( target.parentElement.className.toLowerCase() == "item"){
                        
                        var Element = target.parentElement;

                        // 存储当前元素的top,left
                        var thisTop = parseFloat( Element.style.top );
                        var thisLeft = parseFloat( Element.style.left );

                        // 获取当前点击的位置
                        var pageX = event.pageX;
                        var pageY = event.pageY;
                        
                        // 拖动
                        document.onmousemove = function(e){
                            console.log(e)
                            that.mouseMove(e, Element, thisTop, thisLeft, pageY, pageX);
                            
                            return false;
                        }
                        
                        // 松开
                        document.onmouseup = function(e){

                            that.mouseUp(e, Element, thisTop, thisLeft)
                            
                            // 释放拖拽
                            document.onmousemove = null;
                            document.onmouseup = null;
                            return false;
                        }
          }

          return false;
                },

                /*
                 * @method 拖动小方块
                 * @param e Object 鼠标对象
                 */
                mouseMove: function(e, Element, thisTop, thisLeft, pageY, pageX){
                     var pageX2 = e.pageX;
                    var pageY2 = e.pageY;
                    Element.style.top = thisTop + (pageY2 - pageY) + "px";
                    Element.style.left = thisLeft + (pageX2 - pageX) + "px";
                    Element.style.zIndex = 1000;
                },

                /*
                 * @method 松开小方块
                 * @param e Object 鼠标对象
                 */
                mouseUp: function(e, Element, thisTop, thisLeft){

                     var that = this,
                             cW = this.cW,
                            cH = this.cH;

                     // 检测当前拖动替换目标
                    var moveCenterX = parseFloat(Element.style.left) + cW / 2;
                    var moveCenterY = parseFloat(Element.style.top) + cH / 2;
                    var changeElementIndex = this.checkChangeElement(moveCenterX, moveCenterY);
                    var changeElement = this.Id.getElementsByClassName("item")[changeElementIndex];
            
                    // 限制拖拽范围
                    // 当松开的坐标xy在容器范围内
                    if( e.pageX < this.boxOffsetX || e.pageX > (this.boxOffsetX + this.maxWidth) || e.pageY < this.boxOffsetY || e.pageY > (this.boxOffsetY + this.maxWidth) ){
                        console.log("释放")

                        Element.style.top = thisTop  + "px";
                        Element.style.left = thisLeft + "px";
                        
                    }else{

                        // 判断当前元素是否离开了自己的格子
                        if( Element.getAttribute("data-index") == changeElement.getAttribute("data-index")){
                            Element.style.top = thisTop  + "px";
                            Element.style.left = thisLeft + "px";
                        }else{

                            // 进行替换
                            Element.style.top = changeElement.style.top ;
                            Element.style.left = changeElement.style.left ;

                            changeElement.style.top = thisTop + "px";
                            changeElement.style.left = thisLeft + "px";
                            changeElement.style.zIndex = 1000; 

                            // 更新小方块中心点
                    this.updateElement();
                        }

                    }

                    // 消除层级问题
                    setTimeout(function(){
                        Element.style.zIndex = 0;
                        changeElement.style.zIndex = 0; 
                        if(that.compareArray()){
                            alert("恭喜你,拼图成功!");
                        }
                    }, 150);
                    
                    // 判断拼图完成
                    console.log(this.compareArray())
                    console.log(this.numberArr)

                },

                /*
                 * @method 检测当前拖动替换目标
                 * @param moveLeft Number 鼠标移动的x值
                 * @param moveTop Number 鼠标移动的y值
                 * @return minIndex Number 返回目标对象下标
                 * 通过三角函数检测当前拖动对象中心点和其他所有对象中心点距离,离谁最近就和谁替换
                 */
                checkChangeElement: function(moveLeft, moveTop){

                    // 最小距离
                    var minDistance = null; 
                    // 最小距离替换目标
                    var minIndex = null;

                    for(var i = 0 ; i < this.centerXY.length; i++){

                        var x = Math.abs( moveLeft - this.centerXY[i].x ); 
                        var y= Math.abs( moveTop - this.centerXY[i].y ); 
                        var val = Math.ceil(Math.sqrt( x * x +  y * y));
                        
                        // 初次判断
                        if(minDistance == null){
                            minDistance = val;
                            minIndex = i;
                        } 
                        // 后续判断
                        if(minDistance > val){
                            minDistance = val;
                            minIndex = i;
                        }

                    }
        
                    // 返回目标对象下标
                    return minIndex;
                },

                /*
                 * @method 更新小方块中心点
                 */
                updateElement: function(){
                    var allElement = this.Id.getElementsByClassName("item"),
                            cW = this.cW,
                            cH = this.cH;
                    this.centerXY = [];

                    for(var i = 0 ; i < allElement.length; i++){
                        this.centerXY.push({
                            x: parseFloat(allElement[i].style.left) + cW / 2,
                            y: parseFloat(allElement[i].style.top) + cH / 2
                        });
                    }
                },

                /*
                 * @method 点击小方块
                 * @param event Object 鼠标对象
                 * @ 1、点击当前非空白小方块
                 * @ 2、获取其坐标,并加减一个一个方块宽度,用这个加减坐标去检索空白小方块是否在目标小方块周边
                 * @ 3、如果在,则替换这两个小方块的坐标
                 */
                mouseClick: function(event){
                    console.log(event)

                     var event = event || window.event;

                     var that = this;

          var target = event.target || event.srcElement;

          // 保证拖动的是想要的元素
          if( target.parentElement.className.toLowerCase() == "item"){
                        
                        var Element = target.parentElement;
                        
                        // 当当前点击目标为空白小方块时,终止函数
                        if(Element.getAttribute("data-index") == this.lastElement.sign){
                            return ;
                        }


                        // 存储当前元素的top,left
                        var thisTop = parseFloat( Element.style.top );
                        var thisLeft = parseFloat( Element.style.left );
                        
                        // 点击检测空白方块是否在当前对象周边
                        if(this.mouseClickCheck(thisTop, thisLeft)){
                            console.log(222)
                            // 获取空白元素
                            var lastElement = document.getElementById(this.lastElement.Id);
                            
                            // 替换这两个元素的坐标
                            Element.style.top = lastElement.style.top;
                            Element.style.left = lastElement.style.left;

                            lastElement.style.top = thisTop + "px";
                            lastElement.style.left = thisLeft + "px";

                            this.lastElement.left = thisLeft ;
                            this.lastElement.top = thisTop;
                        

                            // 消除层级问题
                            setTimeout(function(){
                                if(that.compareArray()){
                                    alert("恭喜你,拼图成功!");
                                }
                            }, 150);
                            
                            // 判断拼图完成
                            console.log(this.compareArray())
                            console.log(this.numberArr)

                        }
                        
          }

          return false;
                },

                /*
                 * @method 点击检测空白方块是否在当前对象周边
                 * @param thisTop Number 当前点击元素的top
                 * @param thisLeft NUmber 当前点击元素的left
                 * @return Boolean 是否在周边
                 */
                mouseClickCheck: function(thisTop, thisLeft){

                    var cW = this.cW,
                            cH = this.cH;

                    if(thisTop == this.lastElement.top && (thisLeft - cH) == this.lastElement.left){
                        return true;
                    }

                    if(thisTop == this.lastElement.top && (thisLeft + cH) == this.lastElement.left){
                        return true;
                    }

                    if((thisTop - cW) == this.lastElement.top && thisLeft == this.lastElement.left){
                        return true;
                    }

                    if((thisTop + cW) == this.lastElement.top && thisLeft == this.lastElement.left){
                        return true;
                    }
    
                    return false;
                },

                /*
                 * @method 获取空白元素left,right
                 */
                getLastElement: function(){

                    // 获取空白元素
                    var lastElement = document.getElementById(this.lastElement.Id);
                    console.log(this.lastElement);
                    this.lastElement.left = parseFloat(lastElement.style.left) ;
                    this.lastElement.top = parseFloat(lastElement.style.top);
                },

                /*
                 * @method 打乱小方块
                 * 以小方块的个数为次数,每次随机抽取两个小于小方块的数,然后替换两个dom元素的定位坐标
                 */
                upsetElement: function(){

                    for (var i = 0; i < this.number-1; i++) {

                        // 获取两个不相等的随机值
                        var n1 = Math.floor(Math.random()*this.number);
                        var n2 = Math.floor(Math.random()*this.number);
                        do{
                            n2 = Math.floor(Math.random()*this.number);
                        }while(n1 == n2)

                        // 替换当前的两个小方块的坐标
                        var allElement = this.Id.getElementsByClassName("item");
                        var Top = allElement[n1].style.top ;
                        var Left = allElement[n1].style.left ;
                        
                        allElement[n1].style.top = allElement[n2].style.top ;
                        allElement[n1].style.left = allElement[n2].style.left ;
                        
                        allElement[n2].style.top = Top ;
                        allElement[n2].style.left = Left ;

                    }

                },

                /*
                 * @method 比较小方块是否拼图完成
                 * @return boolean
                 * 获取切换小方块后,获取小方块的序号并与正确排序数组进行比较
                 */
                compareArray: function(){
                    // 获取序号
                    var allElement = this.Id.getElementsByClassName("item");

                    for(var i = 0; i < this.number-1; i++){
                        // 比较序号
                        if( this.numberArr[i].x != allElement[i].style.left ||  this.numberArr[i].y != allElement[i].style.top ){
                            return false;
                        }
                    }
                    
                    return true;
                },

            }

            // 实例化一个对象
            var box = new JigsawGame({
                    Id: 'canvasBox',
                    imgUrl: '../image/lingtai.jpg',
                    level: 1,
                    gameType: 1
            });

            // 实例化一个对象
            var box2 = new JigsawGame({
                    Id: 'canvasBox2',
                    imgUrl: '../image/lingtai.jpg',
                    level: 1,
                    gameType: 2
            });

            function setGame(a, b){
                    document.getElementById("canvasBox").style.display = a;
                    document.getElementById("canvasBox2").style.display = b;
            }
            setGame("block", "none");

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