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qiqiaoban.html
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qiqiaoban.html
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<!DOCTYPE html>
<html>
<head>
<title> canvas绘制七巧板 </title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
</head>
<body>
<canvas id="canvas" style="border: 1px solid #aaa;display:block;">
<!--添加浏览器不支持canves的时候要显示的东西，在支持canvas的时候，该内容被直接忽略-->
</canvas>
<script type="text/javascript">
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:"#caff67"},
{p:[{x:800,y:0},{x:800,y:400},{x:600,y:600},{x:600,y:200}],color:"#67becf"},
{p:[{x:600,y:200},{x:600,y:600},{x:400,y:400}],color:"#ef3d61"},
{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:"#fa8ecc"},
{p:[{x:800,y:400},{x:800,y:800},{x:400,y:800}],color:"#f6ca29"},
];
window.onload = function () {
var canvas = document.getElementById("canvas");
canvas.width = 800;
canvas.height = 800;
if (canvas.getContext("2d")) {
var context = canvas.getContext("2d");
for(var i = 0 ;i < tangram.length; i++){
draw(tangram[i],context);
}
} else {
//显示兼容性处理问题
}
}
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();
cxt.lineWidth = 1;
cxt.strokeStyle="red";
cxt.stroke();
}
</script>
</body>
</html>