Raphael的transform用法

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";
%>
<!DOCTYPE html>
<html>
<head>
<base href="<%=basePath%>">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Title</title>
<script type="text/javascript" src="js/jquery-1.11.1.js"></script>
<script type="text/javascript" src="js/raphael.js"></script>
<script type="text/javascript" src="js/index007.js"></script>
</head>
<body>
<div id="container"></div>
</body>
</html>

$(function() {
    initRaphael();
});
function initRaphael(e) {
    var paper = Raphael(0,0,300,300);
    var r1 = paper.rect(20,20,80,40).attr('fill','red');
    var r2 = paper.rect(100,20,80,40).attr('fill','blue');
    var r3 = paper.rect(180,20,80,40).attr('fill','green');
    // 以自己的中心为旋转点进行旋转45度
    r2.attr('transform','R45');
    // 以140,60为旋转点进行旋转90度
    r3.attr('transform','R90,140,60');
    // 移动至50,60点
    r1.attr('transform','T50,60');
    // 再移动一次，结果不会累加，只会是下面的结果覆盖上面的结果；
    // 而且变换的结果是transform="matrix(1,0,0,1,100,60)"，把变换修订为变换矩阵；
    r1.attr('transform','T100,60');
    // transform不影响原来的属性值，这个x还是20
    console.log(r1.attr('x'));
    // s表示放大
    r2.attr('transform','S0.8,0.5');
    // 这样就把所有的transform清空了
//    r1.attr('transform','');
    // 输出<rect x="20" y="20" width="80" height="40" rx="0" ry="0" fill="#ff0000" stroke="#000" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);" transform="matrix(1,0,0,1,0,0)"></rect>
    console.log(r1.node);
}