canvas-线相关的属性lineCap,lineJoin
2019-08-28 本文已影响0人
AssertDo
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
canvas {
border: 1px solid #ccc;
}
</style>
</head>
<body>
<canvas width="600" height="400"></canvas>
<script>
var myCanvas = document.querySelector('canvas');
var ctx = myCanvas.getContext('2d');
/*画平行线*/
ctx.beginPath();
ctx.moveTo(100,100);
ctx.lineTo(200,20);
ctx.lineTo(300,100);
ctx.strokeStyle = 'blue';
ctx.lineWidth = 10;
ctx.lineCap = 'butt'; //线末端 默认
ctx.lineJoin = 'miter'; //拐点 默认
ctx.stroke();
ctx.beginPath();
ctx.moveTo(100,200);
ctx.lineTo(200,120);
ctx.lineTo(300,200);
ctx.strokeStyle = 'red';
ctx.lineWidth = 20;
ctx.lineCap = 'square'; //线末端 方形
ctx.lineJoin = 'bevel'; //拐点 方形
ctx.stroke();
ctx.beginPath();
ctx.moveTo(100,300);
ctx.lineTo(200,220);
ctx.lineTo(300,300);
ctx.strokeStyle = 'green';
ctx.lineWidth = 30;
ctx.lineCap = 'round'; //线末端 圆形
ctx.lineJoin = 'round'; //拐点 圆形
ctx.stroke();
</script>
</body>
</html>
