只有框框 沒有七色板為什么 代碼正確吧？
<html>
<head>
<title>canvas01</title>
</head>
<body>
<script>
var tangram=[//數(shù)組
{p:[{x:0,y:0},{x:800,y:0},{x:400,y:400}],color:"#caff67"},//類的對(duì)象
{p:[{x:0,y:0},{x:400,y:400},{x:0,y:800}],color:"#67bcef"},
{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:"#f9f51a"},
{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:"#f6ca29"}
];
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,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[i].y);
cxt.closePath();
cxt.fillStyle=piece.color;
cxt.fill();
}
</script>
<canvas id="canvas" ?style="border:5px solid #ccc;margin:50px auto;display:block"></canvas>
</body>
</html>
2016-03-15
你沒取到值
2016-03-15
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[i].y);//這里的Y值寫錯(cuò)了，少了p[i]
cxt.closePath();
cxt.fillStyle=piece.color;
cxt.fill();