<!DOCTYPE HTML>
<html>
<head>
<link rel='stylesheet' type='text/css' href='../style.css' >
<title>libigl file formats | .xml</title>
</head>
<body class=article_outer>
<div class=article_inner>
<a href=..><img src=../libigl-logo.jpg alt="igl logo" class=center></a>
<h1>.xml - serialization format</h1>
<hr>
<p>
A .xml file contains the serialization of an object data structure generated with the XMLSerializer:
</p>
<p>
The top level elements represent the groups in which the object are organised. The object names are unique within these groups.
</p>
<pre><code><group1>
<object1 val="value of object 1"/>
<object2 val="value of object 2"/>
</group1>
<group2>
<object1 val="value of object 1"/>
</group2></code></pre>
<p>
An object can be of following type:<br/>
<br/>
Basic types: <b>char, char*, std::string, bool, usigned int, int, float, double</b><br/>
STL containers: <b>std::array, std::vector, std::pair</b><br/>
Eigen types: <b>Eigen::Matrix, Eigen::SparseMatrix</b><br/>
User defined types: <b>XMLSerializable*.</b><br/>
<br/>
There can also be a hierachical structure like vector<int>, this will result in the following serialization:
</p>
<pre><code><group>
<vector size="3">
<value0 val="1"/>
<value1 val="2"/>
<value2 val="3"/>
</vector>
</group></code></pre>
<p>An example of a serialization of an instance of the class Test</p>
<pre><code>class Test{
int var1;
vector<float> vec1;
};</code></pre>
<p> is shown here:</p>
<pre><code><group>
<Test>
<var1 val="0">
<vec1 size="2">
<value0 val="1"/>
<value1 val="2"/>
</vector>
</Test>
</group></code></pre>
<p>In the following we show the serialization of Eigen matrices.</p>
<p>Eigen::Matrix<int,4,3>:</p>
<pre><code><group>
<matrix row="4" col="3" matrix="
1,2,3,
4,5,6,
7,8,9,
10,11,12/>
</group></code></pre>
<p>Eigen::SparseMatrix<int> (3x3 identity saved as triplets of the non-zero entries):</p>
<pre><code><group>
<matrix row="3" col="3" matrix="
0,0,1,
1,1,1,
2,2,1/>
</group></code></pre>
<p>See also: <a href=.>file formats</a></p>
</div>
</body>
</html>