求教，七巧板只有一個框
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<canvas id="myCanvas" style="border:1px solid #aaa; display:block; margin: 50px auto;">
當前瀏覽器不支持Cancas，請更換瀏覽器再試。
</canvas>
<script>
window.onload = function(){
var sev = [
{p:[{x:0,y:0},{x:800,y:0},{x:400,y:400}],color:"red"},
{p:[{x:0,y:0},{x:400,y:400},{x:0,y:800}],color:"orange"},
{p:[{x:800,y:0},{x:800,y:400},{x:600,y:400},{x:600,y:200}],color:"yellow"},
{p:[{x:600,y:200},{x:600,y:600},{x:400,y:400}],color:"green"},
{p:[{x:400,y:400},{x:600,y:600},{x:400,y:800},{x:200,y:600}],color:"blue"},
{p:[{x:200,y:600},{x:400,y:800},{x:0,y:800}],color:"purple"},
{p:[{x:800,y:400},{x:800,y:800},{x:400,y:800}],color:"brown"},
]
var canvas = document.getElementById('myCanvas');
var context = canvas.getContext("2d");
canvas.width = 800;
canvas.height = 800;
for(var i=0; i <sev.length; i++){
draw(sev[i],context);
}
function draw(piece,cxt){
cxt.beginPath();
cxt.moveTo(piece.p[0].x,piece.p[0].y);
for(var j=1; j<piece.length; j++);
cxt.lineTo(piece.p[j].x,piece.p[j].y);
cxt.closePath();
cxt.fillStyle = piece.color;
cxt.fill();
}
}
</script>
</body>
</html>
2017-05-09
啊，找到了，是piece.p.length沒有分號
2017-05-08
一行代碼，兩個問題，紅色部分已標出