說好的七巧板呢，老師 幫忙看一下 thanks
<!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>
2015-11-17
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 方法給你改了下，但是你的坐標(biāo)好像也不對(duì)。