L1TPhysicalEtAdder Class Reference

#include <L1TPhysicalEtAdder.h>

Inheritance diagram for L1TPhysicalEtAdder:

Public Member Functions
	L1TPhysicalEtAdder (const edm::ParameterSet &ps)
	~L1TPhysicalEtAdder () override
Public Member Functions inherited from edm::global::EDProducer<>
	EDProducer ()=default
	EDProducer (const EDProducer &)=delete
bool	hasAbilityToProduceInBeginLumis () const final
bool	hasAbilityToProduceInBeginProcessBlocks () const final
bool	hasAbilityToProduceInBeginRuns () const final
bool	hasAbilityToProduceInEndLumis () const final
bool	hasAbilityToProduceInEndProcessBlocks () const final
bool	hasAbilityToProduceInEndRuns () const final
EDProducer &	operator= (const EDProducer &)=delete
bool	wantsGlobalLuminosityBlocks () const final
bool	wantsGlobalRuns () const final
bool	wantsInputProcessBlocks () const final
bool	wantsProcessBlocks () const final
bool	wantsStreamLuminosityBlocks () const final
bool	wantsStreamRuns () const final
Public Member Functions inherited from edm::global::EDProducerBase
	EDProducerBase ()
ModuleDescription const &	moduleDescription () const
	~EDProducerBase () override
Public Member Functions inherited from edm::ProducerBase
void	callWhenNewProductsRegistered (std::function< void(BranchDescription const &)> const &func)
std::vector< edm::ProductResolverIndex > const &	indiciesForPutProducts (BranchType iBranchType) const
	ProducerBase ()
std::vector< edm::ProductResolverIndex > const &	putTokenIndexToProductResolverIndex () const
std::vector< bool > const &	recordProvenanceList () const
void	registerProducts (ProducerBase *, ProductRegistry *, ModuleDescription const &)
std::function< void(BranchDescription const &)>	registrationCallback () const
	used by the fwk to register list of products More...
void	resolvePutIndicies (BranchType iBranchType, ModuleToResolverIndicies const &iIndicies, std::string const &moduleLabel)
TypeLabelList const &	typeLabelList () const
	used by the fwk to register the list of products of this module More...
	~ProducerBase () noexcept(false) override
Public Member Functions inherited from edm::EDConsumerBase
std::vector< ConsumesInfo >	consumesInfo () const
void	convertCurrentProcessAlias (std::string const &processName)
	Convert "@currentProcess" in InputTag process names to the actual current process name. More...
	EDConsumerBase ()
	EDConsumerBase (EDConsumerBase const &)=delete
	EDConsumerBase (EDConsumerBase &&)=default
ESProxyIndex const *	esGetTokenIndices (edm::Transition iTrans) const
std::vector< ESProxyIndex > const &	esGetTokenIndicesVector (edm::Transition iTrans) const
std::vector< ESRecordIndex > const &	esGetTokenRecordIndicesVector (edm::Transition iTrans) const
ProductResolverIndexAndSkipBit	indexFrom (EDGetToken, BranchType, TypeID const &) const
void	itemsMayGet (BranchType, std::vector< ProductResolverIndexAndSkipBit > &) const
void	itemsToGet (BranchType, std::vector< ProductResolverIndexAndSkipBit > &) const
std::vector< ProductResolverIndexAndSkipBit > const &	itemsToGetFrom (BranchType iType) const
void	labelsForToken (EDGetToken iToken, Labels &oLabels) const
void	modulesWhoseProductsAreConsumed (std::array< std::vector< ModuleDescription const *> *, NumBranchTypes > &modulesAll, std::vector< ModuleProcessName > &modulesInPreviousProcesses, ProductRegistry const &preg, std::map< std::string, ModuleDescription const *> const &labelsToDesc, std::string const &processName) const
EDConsumerBase const &	operator= (EDConsumerBase const &)=delete
EDConsumerBase &	operator= (EDConsumerBase &&)=default
bool	registeredToConsume (ProductResolverIndex, bool, BranchType) const
bool	registeredToConsumeMany (TypeID const &, BranchType) const
void	selectInputProcessBlocks (ProductRegistry const &productRegistry, ProcessBlockHelperBase const &processBlockHelperBase)
ProductResolverIndexAndSkipBit	uncheckedIndexFrom (EDGetToken) const
void	updateLookup (BranchType iBranchType, ProductResolverIndexHelper const &, bool iPrefetchMayGet)
void	updateLookup (eventsetup::ESRecordsToProxyIndices const &)
virtual	~EDConsumerBase () noexcept(false)

Static Public Member Functions
static void	fillDescriptions (edm::ConfigurationDescriptions &descriptions)
Static Public Member Functions inherited from edm::global::EDProducerBase
static const std::string &	baseType ()
static void	fillDescriptions (ConfigurationDescriptions &descriptions)
static void	prevalidate (ConfigurationDescriptions &descriptions)

Private Member Functions
void	produce (edm::StreamID, edm::Event &, const edm::EventSetup &) const override

Private Attributes
edm::EDGetToken	EGammaToken_
edm::ESGetToken< L1CaloEtScale, L1EmEtScaleRcd >	emScaleToken_
edm::EDGetToken	EtSumToken_
edm::EDGetToken	HfCountsToken_
edm::EDGetToken	HfSumsToken_
edm::ESGetToken< L1CaloEtScale, L1HtMissScaleRcd >	htMissScaleToken_
edm::EDGetToken	IsoTauToken_
edm::ESGetToken< L1CaloEtScale, L1JetEtScaleRcd >	jetScaleToken_
edm::EDGetToken	JetToken_
edm::EDGetToken	preGtJetToken_
edm::EDGetToken	RlxTauToken_

Additional Inherited Members
Public Types inherited from edm::global::EDProducerBase
typedef EDProducerBase	ModuleType
Public Types inherited from edm::ProducerBase
template<typename T >
using	BranchAliasSetterT = ProductRegistryHelper::BranchAliasSetterT< T >
using	ModuleToResolverIndicies = std::unordered_multimap< std::string, std::tuple< edm::TypeID const *, const char *, edm::ProductResolverIndex > >
typedef ProductRegistryHelper::TypeLabelList	TypeLabelList
Public Types inherited from edm::EDConsumerBase
typedef ProductLabels	Labels
Protected Member Functions inherited from edm::ProducerBase
template<Transition Tr = Transition::Event>
auto	produces (std::string instanceName) noexcept
	declare what type of product will make and with which optional label More...
template<Transition B>
BranchAliasSetter	produces (const TypeID &id, std::string instanceName=std::string(), bool recordProvenance=true)
template<BranchType B>
BranchAliasSetter	produces (const TypeID &id, std::string instanceName=std::string(), bool recordProvenance=true)
BranchAliasSetter	produces (const TypeID &id, std::string instanceName=std::string(), bool recordProvenance=true)
template<typename ProductType , Transition B>
BranchAliasSetterT< ProductType >	produces (std::string instanceName)
template<class ProductType >
BranchAliasSetterT< ProductType >	produces ()
template<typename ProductType , BranchType B>
BranchAliasSetterT< ProductType >	produces (std::string instanceName)
template<typename ProductType , BranchType B>
BranchAliasSetterT< ProductType >	produces ()
template<class ProductType >
BranchAliasSetterT< ProductType >	produces (std::string instanceName)
template<typename ProductType , Transition B>
BranchAliasSetterT< ProductType >	produces ()
template<Transition Tr = Transition::Event>
auto	produces () noexcept
ProducesCollector	producesCollector ()
Protected Member Functions inherited from edm::EDConsumerBase
template<typename ProductType , BranchType B = InEvent>
EDGetTokenT< ProductType >	consumes (edm::InputTag const &tag)
template<BranchType B = InEvent>
EDConsumerBaseAdaptor< B >	consumes (edm::InputTag tag) noexcept
EDGetToken	consumes (const TypeToGet &id, edm::InputTag const &tag)
template<BranchType B>
EDGetToken	consumes (TypeToGet const &id, edm::InputTag const &tag)
ConsumesCollector	consumesCollector ()
	Use a ConsumesCollector to gather consumes information from helper functions. More...
template<typename ProductType , BranchType B = InEvent>
void	consumesMany ()
void	consumesMany (const TypeToGet &id)
template<BranchType B>
void	consumesMany (const TypeToGet &id)
template<typename ESProduct , typename ESRecord , Transition Tr = Transition::Event>
auto	esConsumes ()
template<typename ESProduct , typename ESRecord , Transition Tr = Transition::Event>
auto	esConsumes (ESInputTag const &tag)
template<Transition Tr = Transition::Event>
constexpr auto	esConsumes ()
template<Transition Tr = Transition::Event>
auto	esConsumes (ESInputTag tag)
template<Transition Tr = Transition::Event>
ESGetTokenGeneric	esConsumes (eventsetup::EventSetupRecordKey const &iRecord, eventsetup::DataKey const &iKey)
	Used with EventSetupRecord::doGet. More...
template<typename ProductType , BranchType B = InEvent>
EDGetTokenT< ProductType >	mayConsume (edm::InputTag const &tag)
EDGetToken	mayConsume (const TypeToGet &id, edm::InputTag const &tag)
template<BranchType B>
EDGetToken	mayConsume (const TypeToGet &id, edm::InputTag const &tag)
void	resetItemsToGetFrom (BranchType iType)

Detailed Description

Definition at line 41 of file L1TPhysicalEtAdder.h.

Constructor & Destructor Documentation

L1TPhysicalEtAdder()

L1TPhysicalEtAdder::L1TPhysicalEtAdder ( const edm::ParameterSet &  ps )

explicit

Definition at line 77 of file L1TPhysicalEtAdder.cc.

References edm::ParameterSet::getParameter().

                                                                {
  produces<EGammaBxCollection>();
  produces<TauBxCollection>("rlxTaus");
  produces<TauBxCollection>("isoTaus");
  produces<JetBxCollection>();
  produces<JetBxCollection>("preGtJets");
  produces<EtSumBxCollection>();
  produces<CaloSpareBxCollection>("HFRingSums");
  produces<CaloSpareBxCollection>("HFBitCounts");

  EGammaToken_ = consumes<EGammaBxCollection>(ps.getParameter<edm::InputTag>("InputCollection"));
  RlxTauToken_ = consumes<TauBxCollection>(ps.getParameter<edm::InputTag>("InputRlxTauCollection"));
  IsoTauToken_ = consumes<TauBxCollection>(ps.getParameter<edm::InputTag>("InputIsoTauCollection"));
  JetToken_ = consumes<JetBxCollection>(ps.getParameter<edm::InputTag>("InputCollection"));
  preGtJetToken_ = consumes<JetBxCollection>(ps.getParameter<edm::InputTag>("InputPreGtJetCollection"));
  EtSumToken_ = consumes<EtSumBxCollection>(ps.getParameter<edm::InputTag>("InputCollection"));
  HfSumsToken_ = consumes<CaloSpareBxCollection>(ps.getParameter<edm::InputTag>("InputHFSumsCollection"));
  HfCountsToken_ = consumes<CaloSpareBxCollection>(ps.getParameter<edm::InputTag>("InputHFCountsCollection"));
  emScaleToken_ = esConsumes<L1CaloEtScale, L1EmEtScaleRcd>();
  jetScaleToken_ = esConsumes<L1CaloEtScale, L1JetEtScaleRcd>();
  htMissScaleToken_ = esConsumes<L1CaloEtScale, L1HtMissScaleRcd>();
}

~L1TPhysicalEtAdder()

L1TPhysicalEtAdder::~L1TPhysicalEtAdder ( )

override

Definition at line 100 of file L1TPhysicalEtAdder.cc.

{}

Member Function Documentation

fillDescriptions()

void L1TPhysicalEtAdder::fillDescriptions ( edm::ConfigurationDescriptions &  descriptions )

static

Definition at line 289 of file L1TPhysicalEtAdder.cc.

References edm::ConfigurationDescriptions::addDefault(), and submitPVResolutionJobs::desc.

                                                                                    {
  //The following says we do not know what parameters are allowed so do no validation
  // Please change this to state exactly what you do use, even if it is no parameters
  edm::ParameterSetDescription desc;
  desc.setUnknown();
  descriptions.addDefault(desc);
}

produce()

void L1TPhysicalEtAdder::produce ( edm::StreamID  , edm::Event &  iEvent, const edm::EventSetup &  iSetup  ) const

overrideprivatevirtual

Implements edm::global::EDProducerBase.

Definition at line 103 of file L1TPhysicalEtAdder.cc.

References BXVector< T >::begin(), simKBmtfDigis_cfi::bx, BXVector< T >::end(), EgHLTOffHistBins_cfi::et, L1CaloEtScale::et(), PVValHelper::eta, RPCBxOrConfig_cff::firstBX, BXVector< T >::getFirstBX(), edm::EventSetup::getHandle(), BXVector< T >::getLastBX(), iEvent, metsig::jet, wplusjetsAnalysis_cfi::jetScale, L1Analysis::kMissingHt, RPCBxOrConfig_cff::lastBX, L1CaloEtScale::linearLsb(), eostools::move(), L1CaloRegionDetId::N_PHI, and metsig::tau.

                                                                                                 {
  // store new collections which include physical quantities
  std::unique_ptr<EGammaBxCollection> new_egammas(new EGammaBxCollection);
  std::unique_ptr<TauBxCollection> new_rlxtaus(new TauBxCollection);
  std::unique_ptr<TauBxCollection> new_isotaus(new TauBxCollection);
  std::unique_ptr<JetBxCollection> new_jets(new JetBxCollection);
  std::unique_ptr<JetBxCollection> new_preGtJets(new JetBxCollection);
  std::unique_ptr<EtSumBxCollection> new_etsums(new EtSumBxCollection);
  std::unique_ptr<CaloSpareBxCollection> new_hfsums(new CaloSpareBxCollection);
  std::unique_ptr<CaloSpareBxCollection> new_hfcounts(new CaloSpareBxCollection);

  edm::Handle<EGammaBxCollection> old_egammas;
  edm::Handle<TauBxCollection> old_rlxtaus;
  edm::Handle<TauBxCollection> old_isotaus;
  edm::Handle<JetBxCollection> old_jets;
  edm::Handle<JetBxCollection> old_preGtJets;
  edm::Handle<EtSumBxCollection> old_etsums;
  edm::Handle<CaloSpareBxCollection> old_hfsums;
  edm::Handle<CaloSpareBxCollection> old_hfcounts;

  iEvent.getByToken(EGammaToken_, old_egammas);
  iEvent.getByToken(RlxTauToken_, old_rlxtaus);
  iEvent.getByToken(IsoTauToken_, old_isotaus);
  iEvent.getByToken(JetToken_, old_jets);
  iEvent.getByToken(preGtJetToken_, old_preGtJets);
  iEvent.getByToken(EtSumToken_, old_etsums);
  iEvent.getByToken(HfSumsToken_, old_hfsums);
  iEvent.getByToken(HfCountsToken_, old_hfcounts);

  //get the proper scales for conversion to physical et
  edm::ESHandle<L1CaloEtScale> emScale = iSetup.getHandle(emScaleToken_);

  edm::ESHandle<L1CaloEtScale> jetScale = iSetup.getHandle(jetScaleToken_);

  edm::ESHandle<L1CaloEtScale> htMissScale = iSetup.getHandle(htMissScaleToken_);

  int firstBX = old_egammas->getFirstBX();
  int lastBX = old_egammas->getLastBX();

  new_egammas->setBXRange(firstBX, lastBX);
  new_rlxtaus->setBXRange(firstBX, lastBX);
  new_isotaus->setBXRange(firstBX, lastBX);
  new_jets->setBXRange(firstBX, lastBX);
  new_preGtJets->setBXRange(firstBX, lastBX);
  new_etsums->setBXRange(firstBX, lastBX);
  new_hfsums->setBXRange(firstBX, lastBX);
  new_hfcounts->setBXRange(firstBX, lastBX);

  for (int bx = firstBX; bx <= lastBX; ++bx) {
    for (EGammaBxCollection::const_iterator itEGamma = old_egammas->begin(bx); itEGamma != old_egammas->end(bx);
         ++itEGamma) {
      //const double pt = itEGamma->hwPt() * emScale->linearLsb();
      const double et = emScale->et(itEGamma->hwPt());
      const double eta = getPhysicalEta(itEGamma->hwEta());
      const double phi = getPhysicalPhi(itEGamma->hwPhi());
      math::PtEtaPhiMLorentzVector p4(et, eta, phi, 0);

      EGamma eg(*&p4, itEGamma->hwPt(), itEGamma->hwEta(), itEGamma->hwPhi(), itEGamma->hwQual(), itEGamma->hwIso());
      new_egammas->push_back(bx, *&eg);
    }

    for (TauBxCollection::const_iterator itTau = old_rlxtaus->begin(bx); itTau != old_rlxtaus->end(bx); ++itTau) {
      // use the full-circle conversion to match l1extra, accounts for linearLsb and max value automatically
      //const uint16_t rankPt = jetScale->rank((uint16_t)itTau->hwPt());
      //const double et = jetScale->et( rankPt ) ;

      // or use the emScale to get finer-grained et
      //const double et = itTau->hwPt() * emScale->linearLsb();

      // we are now already in the rankPt
      const double et = jetScale->et(itTau->hwPt());

      const double eta = getPhysicalEta(itTau->hwEta());
      const double phi = getPhysicalPhi(itTau->hwPhi());
      math::PtEtaPhiMLorentzVector p4(et, eta, phi, 0);

      Tau tau(*&p4, itTau->hwPt(), itTau->hwEta(), itTau->hwPhi(), itTau->hwQual(), itTau->hwIso());
      new_rlxtaus->push_back(bx, *&tau);
    }

    for (TauBxCollection::const_iterator itTau = old_isotaus->begin(bx); itTau != old_isotaus->end(bx); ++itTau) {
      // use the full-circle conversion to match l1extra, accounts for linearLsb and max value automatically
      //const uint16_t rankPt = jetScale->rank((uint16_t)itTau->hwPt());
      //const double et = jetScale->et( rankPt ) ;

      // or use the emScale to get finer-grained et
      //const double et = itTau->hwPt() * emScale->linearLsb();

      // we are now already in the rankPt
      const double et = jetScale->et(itTau->hwPt());

      const double eta = getPhysicalEta(itTau->hwEta());
      const double phi = getPhysicalPhi(itTau->hwPhi());
      math::PtEtaPhiMLorentzVector p4(et, eta, phi, 0);

      Tau tau(*&p4, itTau->hwPt(), itTau->hwEta(), itTau->hwPhi(), itTau->hwQual(), itTau->hwIso());
      new_isotaus->push_back(bx, *&tau);
    }

    for (JetBxCollection::const_iterator itJet = old_jets->begin(bx); itJet != old_jets->end(bx); ++itJet) {
      // use the full-circle conversion to match l1extra, accounts for linearLsb and max value automatically
      //const uint16_t rankPt = jetScale->rank((uint16_t)itJet->hwPt());
      //const double et = jetScale->et( rankPt ) ;

      // or use the emScale to get finer-grained et
      //const double et = itJet->hwPt() * emScale->linearLsb();

      // we are now already in the rankPt
      const double et = jetScale->et(itJet->hwPt());

      const bool forward = ((itJet->hwQual() & 0x2) != 0);
      const double eta = getPhysicalEta(itJet->hwEta(), forward);
      const double phi = getPhysicalPhi(itJet->hwPhi());
      math::PtEtaPhiMLorentzVector p4(et, eta, phi, 0);

      Jet jet(*&p4, itJet->hwPt(), itJet->hwEta(), itJet->hwPhi(), itJet->hwQual());
      new_jets->push_back(bx, *&jet);
    }

    for (JetBxCollection::const_iterator itJet = old_preGtJets->begin(bx); itJet != old_preGtJets->end(bx); ++itJet) {
      // use the full-circle conversion to match l1extra, accounts for linearLsb and max value automatically
      //const uint16_t rankPt = jetScale->rank((uint16_t)itJet->hwPt());
      //const double et = jetScale->et( rankPt ) ;

      // or use the emScale to get finer-grained et
      const double et = itJet->hwPt() * emScale->linearLsb();

      // we are now already in the rankPt
      //const double et = jetScale->et( itJet->hwPt() );

      const bool forward = ((itJet->hwQual() & 0x2) != 0);
      const double eta = getPhysicalEta(itJet->hwEta(), forward);
      const double phi = getPhysicalPhi(itJet->hwPhi());
      math::PtEtaPhiMLorentzVector p4(et, eta, phi, 0);

      Jet jet(*&p4, itJet->hwPt(), itJet->hwEta(), itJet->hwPhi(), itJet->hwQual());
      new_preGtJets->push_back(bx, *&jet);
    }

    for (EtSumBxCollection::const_iterator itEtSum = old_etsums->begin(bx); itEtSum != old_etsums->end(bx); ++itEtSum) {
      double et = itEtSum->hwPt() * emScale->linearLsb();
      //hack while we figure out the right scales
      //double et = emScale->et( itEtSum->hwPt() );
      const EtSum::EtSumType sumType = itEtSum->getType();

      const double eta = getPhysicalEta(itEtSum->hwEta());
      double phi = getPhysicalPhi(itEtSum->hwPhi());
      if (sumType == EtSum::EtSumType::kMissingHt) {
        et = htMissScale->et(itEtSum->hwPt());
        double regionPhiWidth = 2. * 3.1415927 / L1CaloRegionDetId::N_PHI;
        phi = phi + (regionPhiWidth / 2.);  // add the region half-width to match L1Extra MHT phi
      }

      math::PtEtaPhiMLorentzVector p4(et, eta, phi, 0);

      EtSum eg(*&p4, sumType, itEtSum->hwPt(), itEtSum->hwEta(), itEtSum->hwPhi(), itEtSum->hwQual());
      new_etsums->push_back(bx, *&eg);
    }

    for (CaloSpareBxCollection::const_iterator itCaloSpare = old_hfsums->begin(bx); itCaloSpare != old_hfsums->end(bx);
         ++itCaloSpare) {
      //just pass through for now
      //a different scale is needed depending on the type
      new_hfsums->push_back(bx, *itCaloSpare);
    }

    for (CaloSpareBxCollection::const_iterator itCaloSpare = old_hfcounts->begin(bx);
         itCaloSpare != old_hfcounts->end(bx);
         ++itCaloSpare) {
      //just pass through for now
      //a different scale is needed depending on the type
      new_hfcounts->push_back(bx, *itCaloSpare);
    }
  }

  iEvent.put(std::move(new_egammas));
  iEvent.put(std::move(new_rlxtaus), "rlxTaus");
  iEvent.put(std::move(new_isotaus), "isoTaus");
  iEvent.put(std::move(new_jets));
  iEvent.put(std::move(new_preGtJets), "preGtJets");
  iEvent.put(std::move(new_etsums));
  iEvent.put(std::move(new_hfsums), "HFRingSums");
  iEvent.put(std::move(new_hfcounts), "HFBitCounts");
}

Member Data Documentation

EGammaToken_

edm::EDGetToken L1TPhysicalEtAdder::EGammaToken_

private

Definition at line 53 of file L1TPhysicalEtAdder.h.

emScaleToken_

edm::ESGetToken<L1CaloEtScale, L1EmEtScaleRcd> L1TPhysicalEtAdder::emScaleToken_

private

Definition at line 61 of file L1TPhysicalEtAdder.h.

EtSumToken_

edm::EDGetToken L1TPhysicalEtAdder::EtSumToken_

private

Definition at line 58 of file L1TPhysicalEtAdder.h.

HfCountsToken_

edm::EDGetToken L1TPhysicalEtAdder::HfCountsToken_

private

Definition at line 60 of file L1TPhysicalEtAdder.h.

HfSumsToken_

edm::EDGetToken L1TPhysicalEtAdder::HfSumsToken_

private

Definition at line 59 of file L1TPhysicalEtAdder.h.

htMissScaleToken_

edm::ESGetToken<L1CaloEtScale, L1HtMissScaleRcd> L1TPhysicalEtAdder::htMissScaleToken_

private

Definition at line 63 of file L1TPhysicalEtAdder.h.

IsoTauToken_

edm::EDGetToken L1TPhysicalEtAdder::IsoTauToken_

private

Definition at line 55 of file L1TPhysicalEtAdder.h.

jetScaleToken_

edm::ESGetToken<L1CaloEtScale, L1JetEtScaleRcd> L1TPhysicalEtAdder::jetScaleToken_

private

Definition at line 62 of file L1TPhysicalEtAdder.h.

JetToken_

edm::EDGetToken L1TPhysicalEtAdder::JetToken_

private

Definition at line 56 of file L1TPhysicalEtAdder.h.

preGtJetToken_

edm::EDGetToken L1TPhysicalEtAdder::preGtJetToken_

private

Definition at line 57 of file L1TPhysicalEtAdder.h.

RlxTauToken_

edm::EDGetToken L1TPhysicalEtAdder::RlxTauToken_

private

Definition at line 54 of file L1TPhysicalEtAdder.h.