@import url(http://fonts.googleapis.com/css?family=Open+Sans:300);
body {
background-color:#34495e;
color:#FFF;
font-family: sans-serif;
padding:0;
margin:0;
}
#top {
position:absolute;
left:350px;
top:70px;
}
h1 {
font-family: 'Open Sans', sans-serif;
font-size:30px;
margin:0 0 10px 0;
}
input[type="submit"], input[type="button"], a.button {
background-color:#FFF;
color:#000;
padding:5px;
border: 5px solid #FFF;
text-decoration:none;
display:inline-block;
height:40px;
font-size:16px;
font-family:sans-serif;
margin:0 0 0 10px;
}
input[type="submit"]:hover, input[type="button"]:hover, a.button:hover {
border: 5px solid #DDD;
}
input[type="text"] {
display:inline-block;
height:20px;
width: 290px;
padding: 10px;
font-size: inherit;
border: 0;
}
#result {
top:155px;
position:absolute;
left:350px;
width:300px;
height:300px;
overflow:hidden;
max-height:0;
-webkit-transition: all 0.3s ease-out;
-moz-transition: all 0.3s ease-out;
-ms-transition: all 0.3s ease-out;
-o-transition: all 0.3s ease-out;
transition: all 0.3s ease-out;
}
.solved #result {
max-height:2000px;
padding:20px;
color:#FFF;
}
.answer {
clear:both;
text-align:center;
}
.group {
padding:5px;
margin:5px;
border:1px solid #FFF;
display:inline-block;
}
.group.operator {
border:0;
}
.final {
color:#FFF;
font-size:60px;
text-align:left;
font-family: 'Open Sans', sans-serif;
}
.error {
background-color:#6B1010;
padding:10px;
opacity:0.7;
}<html>
<head>
<script src="exmath.js"></script>
//refer the link in exmath.js are using. https://github.com/davepagurek/XCalc/blob/master/js/XCalc.js
<link rel="stylesheet" type="text/css" href="exmath.css">//css file name.
</head>
<body>
<div id="top"><h1>Maths equation plotter</h1>
f(x) = <input type="text" value="(x+4)^2*(x-6)+60sinx" id="input" /><input type="button" value="Graph" id="simplify" />
</div>
<div id="wrapper">
<div id="result"></div>
</div>
</body>
</html>
我在XCalc.js中有一些代码在代码中运行任何方程类型，基于方程绘制图形，但如何在XCalc.js中绘制椭圆形状如何编写代码。例如（x ^ 2/4 ^ 2）+（y ^ 2/2 ^ 2）= 0基于等式如何绘制椭圆形状请帮帮我...