/** method does preliminary calculations of the detectors positions to convert
results into k-dE space ;
and places the results into static cash to be used in subsequent calls to this
algorithm */
void PreprocessDetectorsToMD::processDetectorsPositions(
    const API::MatrixWorkspace_const_sptr &inputWS,
    DataObjects::TableWorkspace_sptr &targWS) {
  g_log.information()
      << "Preprocessing detector locations in a target reciprocal space\n";
  //
  Geometry::Instrument_const_sptr instrument = inputWS->getInstrument();
  // this->pBaseInstr                = instrument->baseInstrument();
  //
  Geometry::IComponent_const_sptr source = instrument->getSource();
  Geometry::IComponent_const_sptr sample = instrument->getSample();
  if ((!source) || (!sample)) {
    g_log.error() << " Instrument is not fully defined. Can not identify "
                     "source or sample\n";
    throw Kernel::Exception::InstrumentDefinitionError(
        "Instrument not sufficiently defined: failed to get source and/or "
        "sample");
  }

  // L1
  try {
    double L1 = source->getDistance(*sample);
    targWS->logs()->addProperty<double>("L1", L1, true);
    g_log.debug() << "Source-sample distance: " << L1 << '\n';
  } catch (Kernel::Exception::NotFoundError &) {
    throw Kernel::Exception::InstrumentDefinitionError(
        "Unable to calculate source-sample distance for workspace",
        inputWS->getTitle());
  }
  // Instrument name
  std::string InstrName = instrument->getName();
  targWS->logs()->addProperty<std::string>(
      "InstrumentName", InstrName,
      true); // "The name which should unique identify current instrument");
  targWS->logs()->addProperty<bool>("FakeDetectors", false, true);

  // get access to the workspace memory
  auto &sp2detMap = targWS->getColVector<size_t>("spec2detMap");
  auto &detId = targWS->getColVector<int32_t>("DetectorID");
  auto &detIDMap = targWS->getColVector<size_t>("detIDMap");
  auto &L2 = targWS->getColVector<double>("L2");
  auto &TwoTheta = targWS->getColVector<double>("TwoTheta");
  auto &Azimuthal = targWS->getColVector<double>("Azimuthal");
  auto &detDir = targWS->getColVector<Kernel::V3D>("DetDirections");

  // Efixed; do we need one and does one exist?
  double Efi = targWS->getLogs()->getPropertyValueAsType<double>("Ei");
  float *pEfixedArray(nullptr);
  const Geometry::ParameterMap &pmap = inputWS->constInstrumentParameters();
  if (m_getEFixed)
    pEfixedArray = targWS->getColDataArray<float>("eFixed");

  // check if one needs to generate masked detectors column.
  int *pMasksArray(nullptr);
  if (m_getIsMasked)
    pMasksArray = targWS->getColDataArray<int>("detMask");

  //// progress message appearance
  size_t div = 100;
  size_t nHist = targWS->rowCount();
  Mantid::API::Progress theProgress(this, 0, 1, nHist);
  //// Loop over the spectra
  uint32_t liveDetectorsCount(0);
  const auto &spectrumInfo = inputWS->spectrumInfo();
  for (size_t i = 0; i < nHist; i++) {
    sp2detMap[i] = std::numeric_limits<uint64_t>::quiet_NaN();
    detId[i] = std::numeric_limits<int32_t>::quiet_NaN();
    detIDMap[i] = std::numeric_limits<uint64_t>::quiet_NaN();
    L2[i] = std::numeric_limits<double>::quiet_NaN();
    TwoTheta[i] = std::numeric_limits<double>::quiet_NaN();
    Azimuthal[i] = std::numeric_limits<double>::quiet_NaN();
    //     detMask[i]  = true;

    if (!spectrumInfo.hasDetectors(i) || spectrumInfo.isMonitor(i))
      continue;

    // if masked detectors state is not used, masked detectors just ignored;
    bool maskDetector = spectrumInfo.isMasked(i);
    if (m_getIsMasked)
      *(pMasksArray + liveDetectorsCount) = maskDetector ? 1 : 0;
    else if (maskDetector)
      continue;

    const auto &spDet = spectrumInfo.detector(i);

    // calculate the requested values;
    sp2detMap[i] = liveDetectorsCount;
    detId[liveDetectorsCount] = int32_t(spDet.getID());
    detIDMap[liveDetectorsCount] = i;
    L2[liveDetectorsCount] = spectrumInfo.l2(i);

    double polar = spectrumInfo.twoTheta(i);
    double azim = spDet.getPhi();
    TwoTheta[liveDetectorsCount] = polar;
    Azimuthal[liveDetectorsCount] = azim;

    double sPhi = sin(polar);
    double ez = cos(polar);
    double ex = sPhi * cos(azim);
    double ey = sPhi * sin(azim);

    detDir[liveDetectorsCount].setX(ex);
    detDir[liveDetectorsCount].setY(ey);
    detDir[liveDetectorsCount].setZ(ez);

    // double sinTheta=sin(0.5*polar);
    // this->SinThetaSq[liveDetectorsCount]  = sinTheta*sinTheta;

    // specific code which should work and makes sense
    // for indirect instrument but may be deployed on any code with Ei property
    // defined;
    if (pEfixedArray) {
      try {
        Geometry::Parameter_sptr par = pmap.getRecursive(&spDet, "eFixed");
        if (par)
          Efi = par->value<double>();
      } catch (std::runtime_error &) {
      }
      // set efixed for each existing detector
      *(pEfixedArray + liveDetectorsCount) = static_cast<float>(Efi);
    }

    liveDetectorsCount++;
    if (i % div == 0)
      theProgress.report(i, "Preprocessing detectors");
  }
  targWS->logs()->addProperty<uint32_t>("ActualDetectorsNum",
                                        liveDetectorsCount, true);

  theProgress.report();
  g_log.information() << "Finished preprocessing detector locations. Found: "
                      << liveDetectorsCount << " detectors out of: " << nHist
                      << " histograms\n";
}
Beispiel #2
0
    /**The method responsible for analyzing input workspace parameters and preprocessing detectors positions into reciprocal space
    *
    * @param InWS2D -- input Matrix workspace with defined instrument
    * @param dEModeRequested -- energy conversion mode (direct/indirect/elastic)
    * @param updateMasks  --  if full detector positions calculations or just update masking requested
    * @param OutWSName    -- the name for the preprocessed detectors workspace to have in the analysis data service
    * 
    * @return          shared pointer to the workspace with preprocessed detectors information. 
    */
    DataObjects::TableWorkspace_const_sptr ConvertToMDParent::preprocessDetectorsPositions( Mantid::API::MatrixWorkspace_const_sptr InWS2D,const std::string &dEModeRequested,
      bool updateMasks, const std::string & OutWSName)
    {

      DataObjects::TableWorkspace_sptr TargTableWS;
      Kernel::DeltaEMode::Type Emode;

      // Do we need to reuse output workspace
      bool storeInDataService(true);
      std::string tOutWSName(OutWSName);
      if(tOutWSName=="-"||tOutWSName.empty()) // TargTableWS is recalculated each time;
      {
        storeInDataService = false;
        tOutWSName = "ServiceTableWS";  // TODO: should be hidden?
      }
      else
      {
        storeInDataService = true;
      }

      // if output workspace exists in dataservice, we may try to use it
      if(storeInDataService && API::AnalysisDataService::Instance().doesExist(tOutWSName) ) 
      {
        TargTableWS = API::AnalysisDataService::Instance().retrieveWS<DataObjects::TableWorkspace>(tOutWSName);
        // get number of all histograms (may be masked or invalid)
        size_t nHist = InWS2D->getNumberHistograms();
        size_t nDetMap=TargTableWS->rowCount();
        if(nHist==nDetMap)
        {
          // let's take at least some precaution to ensure that instrument have not changed
          std::string currentWSInstrumentName = InWS2D->getInstrument()->getName();
          std::string oldInstrName            = TargTableWS->getLogs()->getPropertyValueAsType<std::string>("InstrumentName");

          if(oldInstrName==currentWSInstrumentName)
          { 
            if(!updateMasks) return TargTableWS;
            //Target workspace with preprocessed detectors exists and seems is correct one. 
            // We still need to update masked detectors information
            TargTableWS = this->runPreprocessDetectorsToMDChildUpdatingMasks(InWS2D,tOutWSName,dEModeRequested,Emode);
            return TargTableWS;
          }
        }
        else // there is a workspace in the data service with the same name but this ws is not suitable as target for this algorithm. 
        {    // Should delete this WS from the dataservice
          API::AnalysisDataService::Instance().remove(tOutWSName);
        }
      }
      // No result found in analysis data service or the result is unsatisfactory. Try to calculate target workspace.  

      TargTableWS =this->runPreprocessDetectorsToMDChildUpdatingMasks(InWS2D,tOutWSName,dEModeRequested,Emode);

      if(storeInDataService)
        API::AnalysisDataService::Instance().addOrReplace(tOutWSName,TargTableWS);
      //    else
      //      TargTableWS->setName(OutWSName);


      // check if we got what we wanted:

      // in direct or indirect mode input ws has to have input energy
      if(Emode==Kernel::DeltaEMode::Direct||Emode==Kernel::DeltaEMode::Indirect)
      {
        double   m_Ei  = TargTableWS->getLogs()->getPropertyValueAsType<double>("Ei");
        if(isNaN(m_Ei))
        {
          // Direct mode needs Ei
          if(Emode==Kernel::DeltaEMode::Direct)throw(std::invalid_argument("Input neutron's energy has to be defined in inelastic mode "));

          // Do we have at least something for Indirect?
          float *eFixed = TargTableWS->getColDataArray<float>("eFixed");
          if(!eFixed)
            throw(std::invalid_argument("Input neutron's energy has to be defined in inelastic mode "));

          uint32_t NDetectors = TargTableWS->getLogs()->getPropertyValueAsType<uint32_t>("ActualDetectorsNum");
          for(uint32_t i=0;i<NDetectors;i++)
            if(isNaN(*(eFixed+i)))throw(std::invalid_argument("Undefined eFixed energy for detector N: "+boost::lexical_cast<std::string>(i)));
        }
      }

      return TargTableWS;
    }