自己写的代码 。颜色、大小有点区别
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>七巧板绘制</title>
</head>
<body>
<canvas id="canvas" style="border:1px solid grey; display:block; margin:100px auto;">
</canvas>
<script>
var arr = [
{
p: [{
x: 0,
y: 0
}, {
x: 400,
y: 0
}, {
x: 200,
y: 200
}],
color: "red"
},
{
p: [{
x: 0,
y: 0
}, {
x: 200,
y: 200
}, {
x: 0,
y: 400
}],
color: "blue"
},
{
p: [{
x: 400,
y: 0
}, {
x: 400,
y: 200
}, {
x: 300,
y: 300
}, {
x: 300,
y: 100
}],
color: "green"
},
{
p: [{
x: 300,
y: 100
}, {
x: 300,
y: 300
}, {
x: 200,
y: 200
}],
color: "orange"
},
{
p: [{
x: 200,
y: 200
}, {
x: 300,
y: 300
}, {
x: 200,
y: 400
}, {
x: 100,
y: 300
}],
color: "yellow"
},
{
p: [{
x: 100,
y: 300
}, {
x: 200,
y: 400
}, {
x: 0,
y: 400
}],
color: "purple"
},
{
p: [{
x: 400,
y: 200
}, {
x: 400,
y: 400
}, {
x: 200,
y: 400
}],
color: "brown"
}
]
window.onload = function () {
var canvas = document.getElementById("canvas");
canvas.width = 400;
canvas.height = 400;
var context = canvas.getContext("2d");
for (var i = 0; i < arr.length; i++)
draw(arr[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.p[i].y);
cxt.closePath();
cxt.fillStyle = piece.color;
cxt.fill();
}
</script>
</body>
</html>
