<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>SVG Draw Arc</title>
<style media="screen">
.svgs{display: flex; flex-flow:row wrap; justify-content: space-around; width: 620px; margin: 0 auto;}
.svgs svg{width:300px; height:200px; background: #F2F2F2; margin-bottom: 10px;}
</style>
</head>
<body>
<div class="svgs">
<svg version="1.1" xmlns="http://www.w3.org/2000/svg">
<path d="M 150 0 L 150 200 M 0 100 L 300 100" stroke="#CCC" stroke-width="1" />
<path id="path1" d="" stroke="#000" fill="green" fill-opacity="1" />
</svg>
<svg version="1.1" xmlns="http://www.w3.org/2000/svg">
<path d="M 150 0 L 150 200 M 0 100 L 300 100" stroke="#CCC" stroke-width="1" />
<path id="path2" d="" stroke="#000" fill="green" fill-opacity="1" />
</svg>
<svg version="1.1" xmlns="http://www.w3.org/2000/svg">
<path d="M 150 0 L 150 200 M 0 100 L 300 100" stroke="#CCC" stroke-width="1" />
<path id="path3" d="" stroke="#000" fill="green" fill-opacity="1" />
</svg>
<svg version="1.1" xmlns="http://www.w3.org/2000/svg">
<path d="M 150 0 L 150 200 M 0 100 L 300 100" stroke="#CCC" stroke-width="1" />
<path id="path4" d="" stroke="#000" fill="green" fill-opacity="1" />
</svg>
</div>
</body>
<script type="text/javascript">
function changeArcDeg(path, d){
path.setAttribute("d", d);
}
function drawArcByRadiusDeg(startX, startY, r, deg, clockwise) {
var cw = typeof clockwise !== 'undefined' ? clockwise : 1;
var x = startX - r + r*Math.cos(deg*Math.PI/180);
var y = startY + (1===cw ? 1 : -1)*r*Math.sin(deg*Math.PI/180);
var bigOrSmall = deg > 180 ? 1 : 0;
var line = " L" + (startX - r) + " " + startY + " L"+startX + " " + startY + "Z";
return "M " + startX +" "+ startY + " A "+ r +" " + r + " 0 " + bigOrSmall + " " +cw+ " " + x + " " + y + line;
}
function run(pid, deg, clockwise){
var path = document.getElementById(pid);
var x = 200, y = 100, r = 50, add = 0===deg ? true : false;
setInterval(function(){
if(deg>360) deg -= 360;
if(deg<0) deg += 360;
path.setAttribute("d", drawArcByRadiusDeg(x, y, r, add ? deg++ : deg--, clockwise)) ;
}, 10);
}
window.onload = function(){
run('path1', 0, 1);
run('path2', 0, 0);
run('path3', 360, 0);
run('path4', 360, 1);
};
</script>
</html>
