static Ref_t create_detector(LCDD& lcdd, xml_h e, SensitiveDetector sens) {
typedef vector<PlacedVolume> Placements;
xml_det_t x_det = e;
Material vacuum = lcdd.vacuum();
int det_id = x_det.id();
string det_name = x_det.nameStr();
bool reflect = x_det.reflect(false);
DetElement sdet (det_name,det_id);
Assembly assembly (det_name);
//Volume assembly (det_name,Box(10000,10000,10000),vacuum);
Volume motherVol = lcdd.pickMotherVolume(sdet);
int m_id=0, c_id=0, n_sensor=0;
map<string,Volume> modules;
map<string, Placements> sensitives;
PlacedVolume pv;
assembly.setVisAttributes(lcdd.invisible());
sens.setType("tracker");
for(xml_coll_t mi(x_det,_U(module)); mi; ++mi, ++m_id) {
xml_comp_t x_mod = mi;
string m_nam = x_mod.nameStr();
xml_comp_t trd = x_mod.trd();
double posY;
double x1 = trd.x1();
double x2 = trd.x2();
double z = trd.z();
double y1, y2, total_thickness=0.;
xml_coll_t ci(x_mod,_U(module_component));
for(ci.reset(), total_thickness=0.0; ci; ++ci)
total_thickness += xml_comp_t(ci).thickness();
y1 = y2 = total_thickness / 2;
Volume m_volume(m_nam, Trapezoid(x1, x2, y1, y2, z), vacuum);
m_volume.setVisAttributes(lcdd.visAttributes(x_mod.visStr()));
for(ci.reset(), n_sensor=1, c_id=0, posY=-y1; ci; ++ci, ++c_id) {
xml_comp_t c = ci;
double c_thick = c.thickness();
Material c_mat = lcdd.material(c.materialStr());
string c_name = _toString(c_id,"component%d");
Volume c_vol(c_name, Trapezoid(x1,x2,c_thick/2e0,c_thick/2e0,z), c_mat);
c_vol.setVisAttributes(lcdd.visAttributes(c.visStr()));
pv = m_volume.placeVolume(c_vol,Position(0,posY+c_thick/2,0));
if ( c.isSensitive() ) {
sdet.check(n_sensor > 2,"SiTrackerEndcap2::fromCompact: "+c_name+" Max of 2 modules allowed!");
pv.addPhysVolID("sensor",n_sensor);
c_vol.setSensitiveDetector(sens);
sensitives[m_nam].push_back(pv);
++n_sensor;
}
posY += c_thick;
}
modules[m_nam] = m_volume;
}
for(xml_coll_t li(x_det,_U(layer)); li; ++li) {
xml_comp_t x_layer(li);
int l_id = x_layer.id();
int mod_num = 1;
for(xml_coll_t ri(x_layer,_U(ring)); ri; ++ri) {
xml_comp_t x_ring = ri;
double r = x_ring.r();
double phi0 = x_ring.phi0(0);
double zstart = x_ring.zstart();
double dz = x_ring.dz(0);
int nmodules = x_ring.nmodules();
string m_nam = x_ring.moduleStr();
Volume m_vol = modules[m_nam];
double iphi = 2*M_PI/nmodules;
double phi = phi0;
Placements& sensVols = sensitives[m_nam];
for(int k=0; k<nmodules; ++k) {
string m_base = _toString(l_id,"layer%d") + _toString(mod_num,"_module%d");
double x = -r*std::cos(phi);
double y = -r*std::sin(phi);
DetElement module(sdet,m_base+"_pos",det_id);
pv = assembly.placeVolume(m_vol,Transform3D(RotationZYX(0,-M_PI/2-phi,-M_PI/2),Position(x,y,zstart+dz)));
pv.addPhysVolID("side",1).addPhysVolID("layer", l_id).addPhysVolID("module",mod_num);
module.setPlacement(pv);
for(size_t ic=0; ic<sensVols.size(); ++ic) {
PlacedVolume sens_pv = sensVols[ic];
DetElement comp_elt(module,sens_pv.volume().name(),mod_num);
comp_elt.setPlacement(sens_pv);
}
if ( reflect ) {
pv = assembly.placeVolume(m_vol,Transform3D(RotationZYX(M_PI,-M_PI/2-phi,-M_PI/2),Position(x,y,-zstart-dz)));
pv.addPhysVolID("side",-1).addPhysVolID("layer",l_id).addPhysVolID("module",mod_num);
DetElement r_module(sdet,m_base+"_neg",det_id);
r_module.setPlacement(pv);
for(size_t ic=0; ic<sensVols.size(); ++ic) {
PlacedVolume sens_pv = sensVols[ic];
DetElement comp_elt(r_module,sens_pv.volume().name(),mod_num);
comp_elt.setPlacement(sens_pv);
}
}
dz = -dz;
phi += iphi;
++mod_num;
}
}
}
pv = motherVol.placeVolume(assembly);
pv.addPhysVolID("system",det_id);
sdet.setPlacement(pv);
return sdet;
}
