canvas画七巧板

<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="Generator" content="EditPlus®">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<title>Document</title>
</head>
<body>
<canvas id="canvas" ></canvas>
</body>
<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:"#67beef"},
{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:"#f9f51n"},
{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:"#f6cn29"}
]

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,context){
context.beginPath();
context.moveTo(piece.p[0].x,piece.p[0].y);
for(var i=1;i<piece.p.length;i++)
context.lineTo(piece.p[i].x,piece.p[i].y);
context.closePath();

context.fillStyle=piece.color;
context.fill();

context.strokeStyle="black";
context.lineWidth=3;
context.stroke();

}
</script>
</html>

原文地址:https://www.cnblogs.com/qiuchunxia/p/5818183.html