七巧板問題
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
</head>
<body>
<canvas id="mycanvas" style="border:1px solid #222;display:block;margin:50px auto;">您的瀏覽器不知此canvas</canvas>
<script type="text/javascript">
var tar=[
? ? ? ? {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:"#f9f5la"},
? ? ? ? {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('mycanvas');
canvas.width=800;
canvas.height=800;
var context=canvas.getContext('2d');
//使用context繪制
//context.lineWidth=5; ?//線條寬度
//context.strokeStyle="black"; ?//線條樣式
for (var i=0;i<tar.length;i++){
draw(tar[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>
不知道為什么顯示不出來效果
