J'ai un xml que j'aime lire dans mon programme, j'ai vu beaucoup d'exmaples comment lire xml en utilisant l'arbre de propriétés de boost, mais je ne pouvais pas le faire fonctionner pour l'imbriqué xml que j'ai:Analyser xml imbriqué avec boost
<?xml version="1.0" encoding="UTF-8"?>
<document version="1.3.0">
<chunk>
<sensors>
<sensor id="0" label="unknown" type="frame">
<resolution width="2056" height="2464"/>
<property name="fixed" value="0"/>
<calibration type="frame" class="adjusted">
<resolution width="2056" height="2464"/>
<fx>7349.85579147491</fx>
<fy>7349.85579147491</fy>
<cx>1028</cx>
<cy>1232</cy>
<p1>0.000308132854297239</p1>
<p2>-0.000521332855614243</p2>
</calibration>
</sensor>
</sensors>
<cameras>
<camera id="0" label="img0000.png" sensor_id="0" enabled="1">
<transform>1.0000000000000000e+000 0.0000000000000000e+000 0.0000000000000000e+000 0.0000000000000000e+000 0.0000000000000000e+000 -1.0000000000000000e+000 -1.2246467991473532e-016 0.0000000000000000e+000 0.0000000000000000e+000 1.2246467991473532e-016 -1.0000000000000000e+000 0.0000000000000000e+000 0.0000000000000000e+000 0.0000000000000000e+000 0.0000000000000000e+000 1.0000000000000000e+000</transform>
</camera>
<camera id="1" label="img0011.png" sensor_id="0" enabled="1">
<transform>9.8183676675341047e-001 -2.7892274662900951e-002 -1.8766615162393202e-001 1.3502780959894856e+000 -2.8076662610258110e-002 -9.9960436765543659e-001 1.6760611099915072e-003 -8.8020303958543274e-003 -1.8763865398120155e-001 3.6234208013954891e-003 -9.8223144235654503e-001 -1.1015316085201440e-001 0.0000000000000000e+000 0.0000000000000000e+000 0.0000000000000000e+000 1.0000000000000000e+000</transform>
</camera>
</cameras>
<reference>LOCAL_CS["Local Coordinates (m)",LOCAL_DATUM["Local Datum",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]]]</reference>
<region>
<center>-5.1216167685514069e-002 -7.0600760442627708e-001 -6.9904047240845895e+000</center>
<size>2.1074647950629393e+000 1.5533586459855240e+000 1.0253878730038792e+000</size>
<R>-9.6011547075389880e-001 2.7340714563038887e-001 5.8539008680217816e-002 -2.6221584379471408e-001 -9.5313222127937347e-001 1.5093647677772853e-001 9.7062526662174770e-002 1.2956659089939432e-001 9.8680867671533157e-001</R>
</region>
<settings>
<property name="accuracy_tiepoints" value="1"/>
<property name="accuracy_cameras" value="10"/>
<property name="accuracy_cameras_ypr" value="2"/>
<property name="accuracy_markers" value="0.005"/>
<property name="accuracy_scalebars" value="0.001"/>
<property name="accuracy_projections" value="0.1"/>
</settings>
</chunk>
</document>
Je suis seulement intéressé par la lecture du nœud caméras et leurs attributs, et je l'ai utilisé le code suivant pour cela, mais il ne fonctionne pas:
using namespace std;
using namespace boost;
using namespace boost::property_tree;
const ptree& empty_ptree() {
static ptree t;
return t;
}
int main()
{
ptree tree;
read_xml(XML_PATH1, tree);
tree = tree.get_child("document.chunk", empty_ptree());
const ptree & formats = tree.get_child("cameras.camera", empty_ptree());
BOOST_FOREACH(const ptree::value_type & f, formats)
{
string at = f.first + ".<xmlattr>";
const ptree & attributes = f.second.get_child("<xmlattr>", empty_ptree());
cout << "Extracting attributes from " << at << ":" << endl;
BOOST_FOREACH(const ptree::value_type &v, attributes)
{
cout << "First: " << v.first.data() << " Second: " << v.second.data() << endl;
}
}
}
Merci! il a résolu mon problème – user3178756