• canvas画七巧板


    <!doctype html>
    <html lang="en">
    <head>
    <meta charset="UTF-8">
    <meta name="Generator" content="EditPlus®">
    <meta name="Author" content="">
    <meta name="Keywords" content="">
    <meta name="Description" content="">
    <title>Document</title>
    </head>
    <body>
    <canvas id="canvas" ></canvas>
    </body>
    <script>
    var tangram=[
    {p:[{x:0,y:0},{x:800,y:0},{x:400,y:400}],color:"#caff67"},
    {p:[{x:0,y:0},{x:400,y:400},{x:0,y:800}],color:"#67beef"},
    {p:[{x:800,y:0},{x:800,y:400},{x:600,y:600},{x:600,y:200}],color:"#ef3d61"},
    {p:[{x:600,y:200},{x:600,y:600},{x:400,y:400}],color:"#f9f51n"},
    {p:[{x:400,y:400},{x:600,y:600},{x:400,y:800},{x:200,y:600}],color:"#a594c0"},
    {p:[{x:200,y:600},{x:400,y:800},{x:0,y:800}],color:"#fa8ccc"},
    {p:[{x:800,y:400},{x:800,y:800},{x:400,y:800}],color:"#f6cn29"}
    ]

    window.onload=function(){
    var canvas=document.getElementById("canvas");
    canvas.width=800;
    canvas.height=800;
    var context=canvas.getContext("2d");
    for(var i=0;i<tangram.length;i++)
    draw(tangram[i],context);
    }

    function draw(piece,context){
    context.beginPath();
    context.moveTo(piece.p[0].x,piece.p[0].y);
    for(var i=1;i<piece.p.length;i++)
    context.lineTo(piece.p[i].x,piece.p[i].y);
    context.closePath();

    context.fillStyle=piece.color;
    context.fill();

    context.strokeStyle="black";
    context.lineWidth=3;
    context.stroke();

    }
    </script>
    </html>

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  • 原文地址:https://www.cnblogs.com/qiuchunxia/p/5818183.html
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