说好的七巧板呢，老师 帮忙看一下 thanks
如果巴黎不快乐01234
2015-11-11 22:40
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>七巧板案例</title>
</head>
<body>
<canvas id="canvas" style="border:1px solid #aaa;display:block magrin:50px auto;"></canvas>
<script>
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:"#67becf"},
{p:[{x:800,y:400},{x:600,y:600},{x:600,y:200}],color:"#ef3d6e"},
{p:[{x:600,y:200},{x:600,y:600},{x:400,y:400}],color:"#cc99ff"},
{p:[{x:400,y:400},{x:600,y:600},{x:400,y:800}],color:"#ff3366"},
{p:[{x:200,y:600},{x:400,y:800},{x:80,y:800}],color:"#ff66ff"},
{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.closePath();
cxt.fillStyle=piece.color;
cxt.fill();
}
</script>
</body>
</html>
1回答
-
- 李晓健
- 2015-11-17 12:37:18
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.fillStyle=piece.color; cxt.fill(); cxt.closePath(); }draw 方法给你改了下，但是你的坐标好像也不对。
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