我的七巧板代码给同学们作参考不过颜色很丑-慕课网

我的七巧板代码给同学们作参考不过颜色很丑

来源：2-2 绘制直线、多边形和七巧板

Adorrable坛子

2015-07-21 20:16

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>Tanzi的七巧板</title>
</head>
<body>
<canvas id ="canvas" style="border: solid 5px black; display:block; margin-top: 150px;margin-left:200px;">
    如果您看到这句话，证明您的浏览器不支持canvas
</canvas>
<script>
    var tangram=[
    {p:[{x:0,y:0},{x:400,y:400},{x:800,y:0}],color:"red"},
    {p:[{x:0,y:0},{x:0,y:800},{x:400,y:400}],color:"blue"},
    {p:[{x:800,y:0},{x:800,y:400},{x:600,y:600},{x:600,y:200}],color:"yellow"},
    {p:[{x:800,y:400},{x:400,y:800},{x:800,y:800}],color:"orange"},
    {p:[{x:400,y:400},{x:600,y:600},{x:600,y:200}],color:"purple"},
    {p:[{x:400,y:400},{x:200,y:600},{x:400,y:800},{x:600,y:600}],color:"green"},
    {p:[{x:200,y:600},{x:0,y:800},{x:400,y:800}],color:"pink"}
]
    window.onload=function(){
        var canvas=document.getElementById('canvas');
        canvas.width=800;
        canvas.height=800;
        var context=canvas.getContext('2d');
        for(i=0;i<tangram.length;i++)
        draw(tangram[i],context);
    }

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

    cxt.fillStyle=piece.color;
        cxt.fill();
    }
</script>
</body>
</html>

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