<!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>
