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File indexing completed on 2021-04-14 02:22:41

0001 ///////////////////////////////////////////////////////////////////////////////
0002 // File: DDHGCalEEAlgo.cc
0003 // Description: Geometry factory class for HGCal (EE and HESil)
0004 ///////////////////////////////////////////////////////////////////////////////
0005 
0006 #include "DataFormats/Math/interface/angle_units.h"
0007 #include "DetectorDescription/Core/interface/DDAlgorithm.h"
0008 #include "DetectorDescription/Core/interface/DDAlgorithmFactory.h"
0009 #include "DetectorDescription/Core/interface/DDCurrentNamespace.h"
0010 #include "DetectorDescription/Core/interface/DDLogicalPart.h"
0011 #include "DetectorDescription/Core/interface/DDMaterial.h"
0012 #include "DetectorDescription/Core/interface/DDSolid.h"
0013 #include "DetectorDescription/Core/interface/DDSplit.h"
0014 #include "DetectorDescription/Core/interface/DDTypes.h"
0015 #include "DetectorDescription/Core/interface/DDutils.h"
0016 #include "FWCore/MessageLogger/interface/MessageLogger.h"
0017 #include "FWCore/PluginManager/interface/PluginFactory.h"
0018 #include "Geometry/HGCalCommonData/interface/HGCalGeomTools.h"
0019 #include "Geometry/HGCalCommonData/interface/HGCalParameters.h"
0020 #include "Geometry/HGCalCommonData/interface/HGCalTypes.h"
0021 #include "Geometry/HGCalCommonData/interface/HGCalWaferType.h"
0022 
0023 #include <cmath>
0024 #include <memory>
0025 #include <string>
0026 #include <unordered_set>
0027 #include <vector>
0028 
0029 //#define EDM_ML_DEBUG
0030 using namespace angle_units::operators;
0031 
0032 class DDHGCalEEAlgo : public DDAlgorithm {
0033 public:
0034   // Constructor and Destructor
0035   DDHGCalEEAlgo();  // const std::string & name);
0036   ~DDHGCalEEAlgo() override;
0037 
0038   void initialize(const DDNumericArguments& nArgs,
0039                   const DDVectorArguments& vArgs,
0040                   const DDMapArguments& mArgs,
0041                   const DDStringArguments& sArgs,
0042                   const DDStringVectorArguments& vsArgs) override;
0043   void execute(DDCompactView& cpv) override;
0044 
0045 protected:
0046   void constructLayers(const DDLogicalPart&, DDCompactView& cpv);
0047   void positionSensitive(const DDLogicalPart& glog,
0048                          double rin,
0049                          double rout,
0050                          double zpos,
0051                          int layertype,
0052                          int layercenter,
0053                          DDCompactView& cpv);
0054 
0055 private:
0056   HGCalGeomTools geomTools_;
0057   std::unique_ptr<HGCalWaferType> waferType_;
0058 
0059   static constexpr double tol1_ = 0.01;
0060   static constexpr double tol2_ = 0.00001;
0061 
0062   std::vector<std::string> wafers_;     // Wafers
0063   std::vector<std::string> materials_;  // Materials
0064   std::vector<std::string> names_;      // Names
0065   std::vector<double> thick_;           // Thickness of the material
0066   std::vector<int> copyNumber_;         // Initial copy numbers
0067   std::vector<int> layers_;             // Number of layers in a section
0068   std::vector<double> layerThick_;      // Thickness of each section
0069   std::vector<int> layerType_;          // Type of the layer
0070   std::vector<int> layerSense_;         // Content of a layer (sensitive?)
0071   std::vector<int> layerCenter_;        // Centering of the wafers
0072   int firstLayer_;                      // Copy # of the first sensitive layer
0073   int absorbMode_;                      // Absorber mode
0074   int sensitiveMode_;                   // Sensitive mode
0075   double zMinBlock_;                    // Starting z-value of the block
0076   std::vector<double> rad100to200_;     // Parameters for 120-200mum trans.
0077   std::vector<double> rad200to300_;     // Parameters for 200-300mum trans.
0078   double zMinRadPar_;                   // Minimum z for radius parametriz.
0079   int choiceType_;                      // Type of parametrization to be used
0080   int nCutRadPar_;                      // Cut off threshold for corners
0081   double fracAreaMin_;                  // Minimum fractional conatined area
0082   double waferSize_;                    // Width of the wafer
0083   double waferSepar_;                   // Sensor separation
0084   int sectors_;                         // Sectors
0085   std::vector<double> slopeB_;          // Slope at the lower R
0086   std::vector<double> zFrontB_;         // Starting Z values for the slopes
0087   std::vector<double> rMinFront_;       // Corresponding rMin's
0088   std::vector<double> slopeT_;          // Slopes at the larger R
0089   std::vector<double> zFrontT_;         // Starting Z values for the slopes
0090   std::vector<double> rMaxFront_;       // Corresponding rMax's
0091   std::string nameSpace_;               // Namespace of this and ALL sub-parts
0092   std::unordered_set<int> copies_;      // List of copy #'s
0093   double alpha_, cosAlpha_;
0094 };
0095 
0096 DDHGCalEEAlgo::DDHGCalEEAlgo() {
0097 #ifdef EDM_ML_DEBUG
0098   edm::LogVerbatim("HGCalGeom") << "DDHGCalEEAlgo: Creating an instance";
0099 #endif
0100 }
0101 
0102 DDHGCalEEAlgo::~DDHGCalEEAlgo() {}
0103 
0104 void DDHGCalEEAlgo::initialize(const DDNumericArguments& nArgs,
0105                                const DDVectorArguments& vArgs,
0106                                const DDMapArguments&,
0107                                const DDStringArguments& sArgs,
0108                                const DDStringVectorArguments& vsArgs) {
0109   wafers_ = vsArgs["WaferNames"];
0110 #ifdef EDM_ML_DEBUG
0111   edm::LogVerbatim("HGCalGeom") << "DDHGCalEEAlgo: " << wafers_.size() << " wafers";
0112   for (unsigned int i = 0; i < wafers_.size(); ++i)
0113     edm::LogVerbatim("HGCalGeom") << "Wafer[" << i << "] " << wafers_[i];
0114 #endif
0115   materials_ = vsArgs["MaterialNames"];
0116   names_ = vsArgs["VolumeNames"];
0117   thick_ = vArgs["Thickness"];
0118   copyNumber_.resize(materials_.size(), 1);
0119 #ifdef EDM_ML_DEBUG
0120   edm::LogVerbatim("HGCalGeom") << "DDHGCalEEAlgo: " << materials_.size() << " types of volumes";
0121   for (unsigned int i = 0; i < names_.size(); ++i)
0122     edm::LogVerbatim("HGCalGeom") << "Volume [" << i << "] " << names_[i] << " of thickness " << thick_[i]
0123                                   << " filled with " << materials_[i] << " first copy number " << copyNumber_[i];
0124 #endif
0125   layers_ = dbl_to_int(vArgs["Layers"]);
0126   layerThick_ = vArgs["LayerThick"];
0127 #ifdef EDM_ML_DEBUG
0128   edm::LogVerbatim("HGCalGeom") << "There are " << layers_.size() << " blocks";
0129   for (unsigned int i = 0; i < layers_.size(); ++i)
0130     edm::LogVerbatim("HGCalGeom") << "Block [" << i << "] of thickness " << layerThick_[i] << " with " << layers_[i]
0131                                   << " layers";
0132 #endif
0133   layerType_ = dbl_to_int(vArgs["LayerType"]);
0134   layerSense_ = dbl_to_int(vArgs["LayerSense"]);
0135   firstLayer_ = (int)(nArgs["FirstLayer"]);
0136   absorbMode_ = (int)(nArgs["AbsorberMode"]);
0137   sensitiveMode_ = (int)(nArgs["SensitiveMode"]);
0138 #ifdef EDM_ML_DEBUG
0139   edm::LogVerbatim("HGCalGeom") << "First Layer " << firstLayer_ << " and "
0140                                 << "Absober:Sensitive mode " << absorbMode_ << ":" << sensitiveMode_;
0141 #endif
0142   layerCenter_ = dbl_to_int(vArgs["LayerCenter"]);
0143 #ifdef EDM_ML_DEBUG
0144   for (unsigned int i = 0; i < layerCenter_.size(); ++i)
0145     edm::LogVerbatim("HGCalGeom") << "LayerCenter [" << i << "] " << layerCenter_[i];
0146 #endif
0147   if (firstLayer_ > 0) {
0148     for (unsigned int i = 0; i < layerType_.size(); ++i) {
0149       if (layerSense_[i] > 0) {
0150         int ii = layerType_[i];
0151         copyNumber_[ii] = firstLayer_;
0152 #ifdef EDM_ML_DEBUG
0153         edm::LogVerbatim("HGCalGeom") << "First copy number for layer type " << i << ":" << ii << " with "
0154                                       << materials_[ii] << " changed to " << copyNumber_[ii];
0155 #endif
0156         break;
0157       }
0158     }
0159   } else {
0160     firstLayer_ = 1;
0161   }
0162 #ifdef EDM_ML_DEBUG
0163   edm::LogVerbatim("HGCalGeom") << "There are " << layerType_.size() << " layers";
0164   for (unsigned int i = 0; i < layerType_.size(); ++i)
0165     edm::LogVerbatim("HGCalGeom") << "Layer [" << i << "] with material type " << layerType_[i] << " sensitive class "
0166                                   << layerSense_[i];
0167 #endif
0168   zMinBlock_ = nArgs["zMinBlock"];
0169   rad100to200_ = vArgs["rad100to200"];
0170   rad200to300_ = vArgs["rad200to300"];
0171   zMinRadPar_ = nArgs["zMinForRadPar"];
0172   choiceType_ = (int)(nArgs["choiceType"]);
0173   nCutRadPar_ = (int)(nArgs["nCornerCut"]);
0174   fracAreaMin_ = nArgs["fracAreaMin"];
0175   waferSize_ = nArgs["waferSize"];
0176   waferSepar_ = nArgs["SensorSeparation"];
0177   sectors_ = (int)(nArgs["Sectors"]);
0178   alpha_ = (1._pi) / sectors_;
0179   cosAlpha_ = cos(alpha_);
0180 #ifdef EDM_ML_DEBUG
0181   edm::LogVerbatim("HGCalGeom") << "zStart " << zMinBlock_ << " radius for wafer type separation uses "
0182                                 << rad100to200_.size() << " parameters; zmin " << zMinRadPar_ << " cutoff "
0183                                 << choiceType_ << ":" << nCutRadPar_ << ":" << fracAreaMin_ << " wafer width "
0184                                 << waferSize_ << " separations " << waferSepar_ << " sectors " << sectors_ << ":"
0185                                 << convertRadToDeg(alpha_) << ":" << cosAlpha_;
0186   for (unsigned int k = 0; k < rad100to200_.size(); ++k)
0187     edm::LogVerbatim("HGCalGeom") << "[" << k << "] 100-200 " << rad100to200_[k] << " 200-300 " << rad200to300_[k];
0188 #endif
0189   slopeB_ = vArgs["SlopeBottom"];
0190   zFrontB_ = vArgs["ZFrontBottom"];
0191   rMinFront_ = vArgs["RMinFront"];
0192   slopeT_ = vArgs["SlopeTop"];
0193   zFrontT_ = vArgs["ZFrontTop"];
0194   rMaxFront_ = vArgs["RMaxFront"];
0195 #ifdef EDM_ML_DEBUG
0196   for (unsigned int i = 0; i < slopeB_.size(); ++i)
0197     edm::LogVerbatim("HGCalGeom") << "Block [" << i << "] Zmin " << zFrontB_[i] << " Rmin " << rMinFront_[i]
0198                                   << " Slope " << slopeB_[i];
0199   for (unsigned int i = 0; i < slopeT_.size(); ++i)
0200     edm::LogVerbatim("HGCalGeom") << "Block [" << i << "] Zmin " << zFrontT_[i] << " Rmax " << rMaxFront_[i]
0201                                   << " Slope " << slopeT_[i];
0202 #endif
0203   nameSpace_ = DDCurrentNamespace::ns();
0204 #ifdef EDM_ML_DEBUG
0205   edm::LogVerbatim("HGCalGeom") << "DDHGCalEEAlgo: NameSpace " << nameSpace_;
0206 #endif
0207 
0208   waferType_ = std::make_unique<HGCalWaferType>(
0209       rad100to200_, rad200to300_, (waferSize_ + waferSepar_), zMinRadPar_, choiceType_, nCutRadPar_, fracAreaMin_);
0210 }
0211 
0212 ////////////////////////////////////////////////////////////////////
0213 // DDHGCalEEAlgo methods...
0214 ////////////////////////////////////////////////////////////////////
0215 
0216 void DDHGCalEEAlgo::execute(DDCompactView& cpv) {
0217 #ifdef EDM_ML_DEBUG
0218   edm::LogVerbatim("HGCalGeom") << "==>> Constructing DDHGCalEEAlgo...";
0219   copies_.clear();
0220 #endif
0221   constructLayers(parent(), cpv);
0222 #ifdef EDM_ML_DEBUG
0223   edm::LogVerbatim("HGCalGeom") << "DDHGCalEEAlgo: " << copies_.size() << " different wafer copy numbers";
0224   int k(0);
0225   for (std::unordered_set<int>::const_iterator itr = copies_.begin(); itr != copies_.end(); ++itr, ++k) {
0226     edm::LogVerbatim("HGCalGeom") << "Copy [" << k << "] : " << (*itr);
0227   }
0228   copies_.clear();
0229   edm::LogVerbatim("HGCalGeom") << "<<== End of DDHGCalEEAlgo construction...";
0230 #endif
0231 }
0232 
0233 void DDHGCalEEAlgo::constructLayers(const DDLogicalPart& module, DDCompactView& cpv) {
0234 #ifdef EDM_ML_DEBUG
0235   edm::LogVerbatim("HGCalGeom") << "DDHGCalEEAlgo: \t\tInside Layers";
0236 #endif
0237   double zi(zMinBlock_);
0238   int laymin(0);
0239   for (unsigned int i = 0; i < layers_.size(); i++) {
0240     double zo = zi + layerThick_[i];
0241     double routF = HGCalGeomTools::radius(zi, zFrontT_, rMaxFront_, slopeT_);
0242     int laymax = laymin + layers_[i];
0243     double zz = zi;
0244     double thickTot(0);
0245     for (int ly = laymin; ly < laymax; ++ly) {
0246       int ii = layerType_[ly];
0247       int copy = copyNumber_[ii];
0248       double hthick = 0.5 * thick_[ii];
0249       double rinB = HGCalGeomTools::radius(zo - tol1_, zFrontB_, rMinFront_, slopeB_);
0250       zz += hthick;
0251       thickTot += thick_[ii];
0252 
0253       std::string name = names_[ii] + std::to_string(copy);
0254 #ifdef EDM_ML_DEBUG
0255       edm::LogVerbatim("HGCalGeom") << "DDHGCalEEAlgo: Layer " << ly << ":" << ii << " Front " << zi << ", " << routF
0256                                     << " Back " << zo << ", " << rinB << " superlayer thickness " << layerThick_[i];
0257 #endif
0258       DDName matName(DDSplit(materials_[ii]).first, DDSplit(materials_[ii]).second);
0259       DDMaterial matter(matName);
0260       DDLogicalPart glog;
0261       if (layerSense_[ly] < 1) {
0262         std::vector<double> pgonZ, pgonRin, pgonRout;
0263         if (layerSense_[ly] == 0 || absorbMode_ == 0) {
0264           double rmax = routF * cosAlpha_ - tol1_;
0265           pgonZ.emplace_back(-hthick);
0266           pgonZ.emplace_back(hthick);
0267           pgonRin.emplace_back(rinB);
0268           pgonRin.emplace_back(rinB);
0269           pgonRout.emplace_back(rmax);
0270           pgonRout.emplace_back(rmax);
0271         } else {
0272           HGCalGeomTools::radius(zz - hthick,
0273                                  zz + hthick,
0274                                  zFrontB_,
0275                                  rMinFront_,
0276                                  slopeB_,
0277                                  zFrontT_,
0278                                  rMaxFront_,
0279                                  slopeT_,
0280                                  -layerSense_[ly],
0281                                  pgonZ,
0282                                  pgonRin,
0283                                  pgonRout);
0284 #ifdef EDM_ML_DEBUG
0285           edm::LogVerbatim("HGCalGeom") << "DDHGCalEEAlgo: z " << (zz - hthick) << ":" << (zz + hthick) << " with "
0286                                         << pgonZ.size() << " palnes";
0287           for (unsigned int isec = 0; isec < pgonZ.size(); ++isec)
0288             edm::LogVerbatim("HGCalGeom")
0289                 << "[" << isec << "] z " << pgonZ[isec] << " R " << pgonRin[isec] << ":" << pgonRout[isec];
0290 #endif
0291           for (unsigned int isec = 0; isec < pgonZ.size(); ++isec) {
0292             pgonZ[isec] -= zz;
0293             pgonRout[isec] = pgonRout[isec] * cosAlpha_ - tol1_;
0294           }
0295         }
0296         DDSolid solid =
0297             DDSolidFactory::polyhedra(DDName(name, nameSpace_), sectors_, -alpha_, 2._pi, pgonZ, pgonRin, pgonRout);
0298         glog = DDLogicalPart(solid.ddname(), matter, solid);
0299 #ifdef EDM_ML_DEBUG
0300         edm::LogVerbatim("HGCalGeom") << "DDHGCalEEAlgo: " << solid.name() << " polyhedra of " << sectors_
0301                                       << " sectors covering " << convertRadToDeg(-alpha_) << ":"
0302                                       << convertRadToDeg(-alpha_ + 2._pi) << " with " << pgonZ.size()
0303                                       << " sections and filled with " << matName << ":" << &matter;
0304         for (unsigned int k = 0; k < pgonZ.size(); ++k)
0305           edm::LogVerbatim("HGCalGeom") << "[" << k << "] z " << pgonZ[k] << " R " << pgonRin[k] << ":" << pgonRout[k];
0306 #endif
0307       } else {
0308         double rins =
0309             (sensitiveMode_ < 1) ? rinB : HGCalGeomTools::radius(zz + hthick - tol1_, zFrontB_, rMinFront_, slopeB_);
0310         double routs =
0311             (sensitiveMode_ < 1) ? routF : HGCalGeomTools::radius(zz - hthick, zFrontT_, rMaxFront_, slopeT_);
0312         DDSolid solid = DDSolidFactory::tubs(DDName(name, nameSpace_), hthick, rins, routs, 0.0, 2._pi);
0313         glog = DDLogicalPart(solid.ddname(), matter, solid);
0314 #ifdef EDM_ML_DEBUG
0315         edm::LogVerbatim("HGCalGeom") << "DDHGCalEEFileAlgo: " << solid.name() << " Tubs made of " << matName << ":"
0316                                       << &matter << " of dimensions " << rinB << ":" << rins << ", " << routF << ":"
0317                                       << routs << ", " << hthick << ", 0.0, 360.0 and position " << glog.name()
0318                                       << " number " << copy << ":" << layerCenter_[copy - firstLayer_];
0319 #endif
0320         positionSensitive(glog, rins, routs, zz, layerSense_[ly], layerCenter_[copy - firstLayer_], cpv);
0321       }
0322       DDTranslation r1(0, 0, zz);
0323       DDRotation rot;
0324       cpv.position(glog, module, copy, r1, rot);
0325       ++copyNumber_[ii];
0326 #ifdef EDM_ML_DEBUG
0327       edm::LogVerbatim("HGCalGeom") << "DDHGCalEEAlgo: " << glog.name() << " number " << copy << " positioned in "
0328                                     << module.name() << " at " << r1 << " with no rotation";
0329 #endif
0330       zz += hthick;
0331     }  // End of loop over layers in a block
0332     zi = zo;
0333     laymin = laymax;
0334     if (std::abs(thickTot - layerThick_[i]) >= tol2_) {
0335       if (thickTot > layerThick_[i]) {
0336         edm::LogError("HGCalGeom") << "Thickness of the partition " << layerThick_[i] << " is smaller than " << thickTot
0337                                    << ": thickness of all its components **** ERROR ****";
0338       } else {
0339         edm::LogWarning("HGCalGeom") << "Thickness of the partition " << layerThick_[i] << " does not match with "
0340                                      << thickTot << " of the components";
0341       }
0342     }
0343   }  // End of loop over blocks
0344 }
0345 
0346 void DDHGCalEEAlgo::positionSensitive(const DDLogicalPart& glog,
0347                                       double rin,
0348                                       double rout,
0349                                       double zpos,
0350                                       int layertype,
0351                                       int layercenter,
0352                                       DDCompactView& cpv) {
0353   static const double sqrt3 = std::sqrt(3.0);
0354   double r = 0.5 * (waferSize_ + waferSepar_);
0355   double R = 2.0 * r / sqrt3;
0356   double dy = 0.75 * R;
0357   int N = (int)(0.5 * rout / r) + 2;
0358   const auto& xyoff = geomTools_.shiftXY(layercenter, (waferSize_ + waferSepar_));
0359 #ifdef EDM_ML_DEBUG
0360   int ium(0), ivm(0), iumAll(0), ivmAll(0), kount(0), ntot(0), nin(0);
0361   std::vector<int> ntype(6, 0);
0362   edm::LogVerbatim("HGCalGeom") << "DDHGCalEEAlgo: " << glog.ddname() << " rin:rout " << rin << ":" << rout << " zpos "
0363                                 << zpos << " N " << N << " for maximum u, v;  r " << r << " R " << R << " dy " << dy
0364                                 << " Shift " << xyoff.first << ":" << xyoff.second << " WaferSize "
0365                                 << (waferSize_ + waferSepar_);
0366 #endif
0367   for (int u = -N; u <= N; ++u) {
0368     for (int v = -N; v <= N; ++v) {
0369       int nr = 2 * v;
0370       int nc = -2 * u + v;
0371       double xpos = xyoff.first + nc * r;
0372       double ypos = xyoff.second + nr * dy;
0373       const auto& corner = HGCalGeomTools::waferCorner(xpos, ypos, r, R, rin, rout, false);
0374 #ifdef EDM_ML_DEBUG
0375       int iu = std::abs(u);
0376       int iv = std::abs(v);
0377       ++ntot;
0378       if (((corner.first <= 0) && std::abs(u) < 5 && std::abs(v) < 5) || (std::abs(u) < 2 && std::abs(v) < 2)) {
0379         edm::LogVerbatim("HGCalGeom") << "DDHGCalEEAlgo: " << glog.ddname() << " R " << rin << ":" << rout << "\n Z "
0380                                       << zpos << " LayerType " << layertype << " u " << u << " v " << v << " with "
0381                                       << corner.first << " corners";
0382       }
0383 #endif
0384       if (corner.first > 0) {
0385         int type = waferType_->getType(xpos, ypos, zpos);
0386         int copy = HGCalTypes::packTypeUV(type, u, v);
0387         if (layertype > 1)
0388           type += 3;
0389 #ifdef EDM_ML_DEBUG
0390         if (iu > ium)
0391           ium = iu;
0392         if (iv > ivm)
0393           ivm = iv;
0394         kount++;
0395         if (copies_.count(copy) == 0)
0396           copies_.insert(copy);
0397 #endif
0398         if (corner.first == (int)(HGCalParameters::k_CornerSize)) {
0399 #ifdef EDM_ML_DEBUG
0400           if (iu > iumAll)
0401             iumAll = iu;
0402           if (iv > ivmAll)
0403             ivmAll = iv;
0404           ++nin;
0405 #endif
0406           DDTranslation tran(xpos, ypos, 0.0);
0407           DDRotation rotation;
0408           DDName name = DDName(DDSplit(wafers_[type]).first, DDSplit(wafers_[type]).second);
0409           cpv.position(name, glog.ddname(), copy, tran, rotation);
0410 #ifdef EDM_ML_DEBUG
0411           ++ntype[type];
0412           edm::LogVerbatim("HGCalGeom") << " DDHGCalEEAlgo: " << name << " number " << copy << " positioned in "
0413                                         << glog.ddname() << " at " << tran << " with no rotation";
0414 #endif
0415         }
0416       }
0417     }
0418   }
0419 #ifdef EDM_ML_DEBUG
0420   edm::LogVerbatim("HGCalGeom") << "DDHGCalEEAlgo: Maximum # of u " << ium << ":" << iumAll << " # of v " << ivm << ":"
0421                                 << ivmAll << " and " << nin << ":" << kount << ":" << ntot << " wafers (" << ntype[0]
0422                                 << ":" << ntype[1] << ":" << ntype[2] << ":" << ntype[3] << ":" << ntype[4] << ":"
0423                                 << ntype[5] << ") for " << glog.ddname() << " R " << rin << ":" << rout;
0424 #endif
0425 }
0426 
0427 DEFINE_EDM_PLUGIN(DDAlgorithmFactory, DDHGCalEEAlgo, "hgcal:DDHGCalEEAlgo");