为什么我这画出来只有四块呢
<script>
var tangram=[
{p:[{x:0,y:0},{x:300,y:0},{x:150,y:150}],color:"#caff67"},
{p:[{x:0,y:0},{x:150,y:150},{x:0,y:300}],color:"#67becf"},
{p:[{x:300,y:0},{x:300,y:150},{x:225,y:225},{x:225,y:75}],color:"#ef3d61"},
{p:[{x:225,y:75},{x:225,y:225},{x:150,y:150}],color:"#f9f51a"},
{p:[{x:150,y:150},{x:225,y:225},{x:150,y:300},{x:75,y:225}],color:"#a594c0"},
{p:[{x:75,y:225},{x:150,y:300},{x:0,y:300}],color:"#fa8ecc"},
{p:[{x:300,y:150},{x:300,y:300},{x:150,y:300}],color:"#f6ca29"},
];
window.onload=function(){
var canvas=document.getElementById("canvas");
if(canvas.getContext("2d")){
var context=canvas.getContext("2d");}else{
alert("当前浏览器不支持canvas，请更换浏览器后再试");
}
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=0;i<piece.p.length;i++){
cxt.lineTo(piece.p[i].x,piece.p[i].y);
}
cxt.closePath();
cxt.fillStyle=piece.color;
cxt.fill();
}
}
</script>
