//==========================================================================
// AIDA Detector description implementation
//--------------------------------------------------------------------------
// Copyright (C) Organisation europeenne pour la Recherche nucleaire (CERN)
// All rights reserved.
//
// For the licensing terms see $DD4hepINSTALL/LICENSE.
// For the list of contributors see $DD4hepINSTALL/doc/CREDITS.
//
// Author : M.Frank
//
//==========================================================================
//
// Specialized generic detector constructor
//
//==========================================================================
#include "DD4hep/DetFactoryHelper.h"
#include "XML/Layering.h"
using namespace std;
using namespace dd4hep;
using namespace dd4hep::detail;
static Ref_t create_detector(Detector& description, xml_h e, SensitiveDetector sens) {
static double tolerance = 0e0;
Layering layering (e);
xml_det_t x_det = e;
Material air = description.air();
int det_id = x_det.id();
string det_name = x_det.nameStr();
xml_comp_t x_staves = x_det.staves();
xml_comp_t x_dim = x_det.dimensions();
int nsides = x_dim.numsides();
double inner_r = x_dim.rmin();
double dphi = (2*M_PI/nsides);
double hphi = dphi/2;
double mod_z = layering.totalThickness();
double outer_r = inner_r + mod_z;
double totThick = mod_z;
double offset = x_det.attr<double>(_Unicode(offset));
DetElement sdet (det_name,det_id);
Volume motherVol = description.pickMotherVolume(sdet);
PolyhedraRegular hedra (nsides,inner_r,inner_r+totThick+tolerance*2e0,x_dim.z());
Volume envelope (det_name,hedra,air);
PlacedVolume env_phv = motherVol.placeVolume(envelope,Transform3D(Translation3D(0,0,offset)*RotationZ(M_PI/nsides)));
env_phv.addPhysVolID("system",det_id);
env_phv.addPhysVolID("barrel",0);
sdet.setPlacement(env_phv);
DetElement stave_det("stave0",det_id);
double dx = 0.0; //mod_z / std::sin(dphi); // dx per layer
// Compute the top and bottom face measurements.
double trd_x2 = (2 * std::tan(hphi) * outer_r - dx)/2 - tolerance;
double trd_x1 = (2 * std::tan(hphi) * inner_r + dx)/2 - tolerance;
double trd_y1 = x_dim.z()/2 - tolerance;
double trd_y2 = trd_y1;
double trd_z = mod_z/2 - tolerance;
// Create the trapezoid for the stave.
Trapezoid trd(trd_x1, // Outer side, i.e. the "short" X side.
trd_x2, // Inner side, i.e. the "long" X side.
trd_y1, // Corresponds to subdetector (or module) Z.
trd_y2, //
trd_z); // Thickness, in Y for top stave, when rotated.
Volume mod_vol("stave",trd,air);
sens.setType("calorimeter");
{ // ===== buildBarrelStave(description, sens, module_volume) =====
// Parameters for computing the layer X dimension:
double stave_z = trd_y1;
double tan_hphi = std::tan(hphi);
double l_dim_x = trd_x1; // Starting X dimension for the layer.
double l_pos_z = -(layering.totalThickness() / 2);
// Loop over the sets of layer elements in the detector.
int l_num = 1;
for(xml_coll_t li(x_det,_U(layer)); li; ++li) {
xml_comp_t x_layer = li;
int repeat = x_layer.repeat();
// Loop over number of repeats for this layer.
for (int j=0; j<repeat; j++) {
string l_name = _toString(l_num,"layer%d");
double l_thickness = layering.layer(l_num-1)->thickness(); // Layer's thickness.
Position l_pos(0,0,l_pos_z+l_thickness/2); // Position of the layer.
Box l_box(l_dim_x-tolerance,stave_z-tolerance,l_thickness / 2-tolerance);
Volume l_vol(l_name,l_box,air);
DetElement layer(stave_det, l_name, det_id);
// Loop over the sublayers or slices for this layer.
int s_num = 1;
double s_pos_z = -(l_thickness / 2);
for(xml_coll_t si(x_layer,_U(slice)); si; ++si) {
xml_comp_t x_slice = si;
string s_name = _toString(s_num,"slice%d");
double s_thick = x_slice.thickness();
Box s_box(l_dim_x-tolerance,stave_z-tolerance,s_thick / 2-tolerance);
Volume s_vol(s_name,s_box,description.material(x_slice.materialStr()));
DetElement slice(layer,s_name,det_id);
if ( x_slice.isSensitive() ) {
s_vol.setSensitiveDetector(sens);
}
slice.setAttributes(description,s_vol,x_slice.regionStr(),x_slice.limitsStr(),x_slice.visStr());
// Slice placement.
PlacedVolume slice_phv = l_vol.placeVolume(s_vol,Position(0,0,s_pos_z+s_thick/2));
slice_phv.addPhysVolID("slice", s_num);
slice.setPlacement(slice_phv);
// Increment Z position of slice.
s_pos_z += s_thick;
// Increment slice number.
++s_num;
}
// Set region, limitset, and vis of layer.
layer.setAttributes(description,l_vol,x_layer.regionStr(),x_layer.limitsStr(),x_layer.visStr());
PlacedVolume layer_phv = mod_vol.placeVolume(l_vol,l_pos);
layer_phv.addPhysVolID("layer", l_num);
layer.setPlacement(layer_phv);
// Increment to next layer Z position.
double xcut = l_thickness * tan_hphi;
l_dim_x += xcut;
l_pos_z += l_thickness;
++l_num;
}
}
}
// Set stave visualization.
if ( x_staves ) {
mod_vol.setVisAttributes(description.visAttributes(x_staves.visStr()));
}
// Phi start for a stave.
double phi = M_PI / nsides;
double mod_x_off = dx / 2; // Stave X offset, derived from the dx.
double mod_y_off = inner_r + mod_z/2; // Stave Y offset
// Create nsides staves.
for (int i = 0; i < nsides; i++, phi -= dphi) { // i is module number
// Compute the stave position
double m_pos_x = mod_x_off * std::cos(phi) - mod_y_off * std::sin(phi);
double m_pos_y = mod_x_off * std::sin(phi) + mod_y_off * std::cos(phi);
Transform3D tr(RotationZYX(0,phi,M_PI*0.5),Translation3D(-m_pos_x,-m_pos_y,0));
PlacedVolume pv = envelope.placeVolume(mod_vol,tr);
pv.addPhysVolID("system",det_id);
pv.addPhysVolID("barrel",0);
pv.addPhysVolID("module",i+1);
DetElement sd = i==0 ? stave_det : stave_det.clone(_toString(i,"stave%d"));
sd.setPlacement(pv);
sdet.add(sd);
}
// Set envelope volume attributes.
envelope.setAttributes(description,x_det.regionStr(),x_det.limitsStr(),x_det.visStr());
return sdet;
}
DECLARE_DETELEMENT(refdet_EcalBarrel,create_detector)
DECLARE_DETELEMENT(refdet_HcalBarrel,create_detector)