canvas意料之外获得降龙十八掌的效果

瞎整本来是要点击编辑多张图片的，没想到弄成这样。这不是电视剧里的降龙十八掌吗

特此记录留着以后用，看来canvas做游戏特效都不错啊。

canvas意料之外获得降龙十八掌的效果-LMLPHP

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

    <style>

        body,div{

            margin:;

            padding:;

        }

        #d1{

            width:500px;

            height: 400px;

            border: 2px solid #00FFD1;

        }

    </style>

</head>

<body>

<script src="js/jquery-3.3.1.min.js"></script>

<div id="d1">

    <canvas id="myCanvas" width="" height="">

        <p>您的系统不支持此程序!</p>

    </canvas>

</div>

<img src="data:images/boss.png" alt="test01" id="img01" />

<img src="data:images/weixin.png" alt="test01" id="img02" />

<script>

    var canva=document.getElementById("myCanvas");

    var cansText=canva.getContext("2d");

    var imgs=new Array("images/boss.png","images/weixin.png");

    var img;

    var draw=new Array();

    var i=;

    $('#img01').on('click', function(){

        cansText.save();

        cansText.beginPath();

        img = new Image();

        img.src=imgs[];

        cansText.drawImage(img,,,,);

        cansText.closePath();

        cansText.fill();

        cansText.restore();

    });

    $('#img02').on('click', function(){

        cansText.save();

        cansText.beginPath();

        img = new Image();

        img.src=imgs[];

        cansText.drawImage(img,,,,);

        cansText.closePath();

        cansText.fill();

        cansText.restore();

    });

    ini();

    function ini(){

        img = new Image();

        img.src=imgs[];

        draw[i]=img;

        cansText.drawImage(draw[i],,,,);

    }

    //在事件外声明需要用到的变量

    let ax,ay,x,y;

    canva.onmousedown=function (e) {

        canva.onmousemove = function(e){

            x= e.clientX;y=e.clientY;

            //限制移动不能超出画布

            (x<)? ax= : ax=;

            (y<)? ay= : ay=;

            (x <  && x >)? x =e.clientX : x =ax;

            (y >  && y <) ? y=e.clientY : y=ay;

            //先清除之前的然后重新绘制,关键

           // cansText.clearRect(0,0,canva.width,canva.height);

            cansText.drawImage(img,x-,y-,,);

        };

        canva.onmouseup = function(){

            canva.onmousemove = null;

            canva.onmouseup = null;

        };

    }

</script>

</body>

</html>