PixelCPETemplateReco.cc

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// Include our own header first
#include "RecoLocalTracker/SiPixelRecHits/interface/PixelCPETemplateReco.h"

// Geometry services
#include "Geometry/TrackerGeometryBuilder/interface/PixelGeomDetUnit.h"
#include "Geometry/TrackerGeometryBuilder/interface/RectangularPixelTopology.h"

//#define DEBUG

// MessageLogger
#include "FWCore/MessageLogger/interface/MessageLogger.h"

// Magnetic field
#include "MagneticField/Engine/interface/MagneticField.h"

// The template header files
#include "RecoLocalTracker/SiPixelRecHits/interface/SiPixelTemplateReco.h"

#include "RecoLocalTracker/SiPixelRecHits/interface/SiPixelTemplateSplit.h"

#include "FWCore/MessageLogger/interface/MessageLogger.h"

#include <vector>
#include "boost/multi_array.hpp"

#include <iostream>

using namespace SiPixelTemplateReco;
//using namespace SiPixelTemplateSplit;
using namespace std;

namespace {
  constexpr float micronsToCm = 1.0e-4;  
  constexpr int cluster_matrix_size_x = 13;
  constexpr int cluster_matrix_size_y = 21;
}

//-----------------------------------------------------------------------------
//  Constructor. 
//  
//-----------------------------------------------------------------------------
PixelCPETemplateReco::PixelCPETemplateReco(edm::ParameterSet const & conf, 
                       const MagneticField * mag,
                                           const TrackerGeometry& geom,
                       const TrackerTopology& ttopo,
                                           const SiPixelLorentzAngle * lorentzAngle, 
                       const SiPixelTemplateDBObject * templateDBobject) 
  : PixelCPEBase(conf, mag, geom, ttopo, lorentzAngle, 0, templateDBobject, 0,1)
{
  //cout << endl;
  //cout << "Constructing PixelCPETemplateReco::PixelCPETemplateReco(...)................................................." << endl;
  //cout << endl;

  // Configurable parameters
  //DoCosmics_ = conf.getParameter<bool>("DoCosmics"); // Not used in templates
  //LoadTemplatesFromDB_ = conf.getParameter<bool>("LoadTemplatesFromDB"); // Moved to Base

  //cout << " PixelCPETemplateReco : (int)LoadTemplatesFromDB_ = " << (int)LoadTemplatesFromDB_ << endl;
  //cout << "field_magnitude = " << field_magnitude << endl;
  
  // configuration parameter to decide between DB or text file template access

  if ( LoadTemplatesFromDB_ )
    {
      //cout << "PixelCPETemplateReco: Loading templates from database (DB) --------- " << endl;
      
      // Initialize template store to the selected ID [Morris, 6/25/08]  
      if ( !SiPixelTemplate::pushfile( *templateDBobject_, thePixelTemp_) )
    throw cms::Exception("PixelCPETemplateReco") 
      << "\nERROR: Templates not filled correctly. Check the sqlite file. Using SiPixelTemplateDBObject version " 
      << (*templateDBobject_).version() << "\n\n";
    }
  else 
    {
      //cout << "PixelCPETemplateReco : Loading templates 40 and 41 from ASCII files ------------------------" << endl;

      if ( !SiPixelTemplate::pushfile( 40, thePixelTemp_ ) )
    throw cms::Exception("PixelCPETemplateReco") 
      << "\nERROR: Templates 40 not loaded correctly from text file. Reconstruction will fail.\n\n";
    
      if ( !SiPixelTemplate::pushfile( 41, thePixelTemp_ ) )
    throw cms::Exception("PixelCPETemplateReco") 
      << "\nERROR: Templates 41 not loaded correctly from text file. Reconstruction will fail.\n\n";
    }
  
  speed_ = conf.getParameter<int>( "speed");
  LogDebug("PixelCPETemplateReco::PixelCPETemplateReco:") <<
    "Template speed = " << speed_ << "\n";
  
  UseClusterSplitter_ = conf.getParameter<bool>("UseClusterSplitter");
  
}

//-----------------------------------------------------------------------------
//  Clean up.
//-----------------------------------------------------------------------------
PixelCPETemplateReco::~PixelCPETemplateReco()
{
  // &&& delete template store?
}

PixelCPEBase::ClusterParam* PixelCPETemplateReco::createClusterParam(const SiPixelCluster & cl) const
{
   return new ClusterParamTemplate(cl);
}


//------------------------------------------------------------------
//  Public methods mandated by the base class.
//------------------------------------------------------------------

//------------------------------------------------------------------
//  The main call to the template code.
//------------------------------------------------------------------
LocalPoint
PixelCPETemplateReco::localPosition(DetParam const & theDetParam, ClusterParam & theClusterParamBase) const 
{

  ClusterParamTemplate & theClusterParam = static_cast<ClusterParamTemplate &>(theClusterParamBase);

  bool fpix;  //  barrel(false) or forward(true)
  if ( theDetParam.thePart == GeomDetEnumerators::PixelBarrel )   
    fpix = false;    // no, it's not forward -- it's barrel
  else                                              
    fpix = true;     // yes, it's forward
  
  int ID = -9999;
  if ( LoadTemplatesFromDB_ ) {
    int ID0 = templateDBobject_->getTemplateID(theDetParam.theDet->geographicalId()); // just to comapre 
      ID = theDetParam.detTemplateId;
      if(ID0!=ID) cout<<" different id"<< ID<<" "<<ID0<<endl;
  } else { // from asci file 
    if ( !fpix ) ID = 40; // barrel
    else ID = 41; // endcap
  }
  //cout << "PixelCPETemplateReco : ID = " << ID << endl;
  
  SiPixelTemplate templ(thePixelTemp_);

  // Make from cluster (a SiPixelCluster) a boost multi_array_2d called 
  // clust_array_2d.
  boost::multi_array<float, 2> clust_array_2d(boost::extents[cluster_matrix_size_x][cluster_matrix_size_y]);
  
  // Preparing to retrieve ADC counts from the SiPixeltheClusterParam.theCluster->  In the cluster,
  // we have the following:
  //   int minPixelRow(); // Minimum pixel index in the x direction (low edge).
  //   int maxPixelRow(); // Maximum pixel index in the x direction (top edge).
  //   int minPixelCol(); // Minimum pixel index in the y direction (left edge).
  //   int maxPixelCol(); // Maximum pixel index in the y direction (right edge).
  // So the pixels from minPixelRow() will go into clust_array_2d[0][*],
  // and the pixels from minPixelCol() will go into clust_array_2d[*][0].

  int row_offset = theClusterParam.theCluster->minPixelRow();
  int col_offset = theClusterParam.theCluster->minPixelCol();
  
  // Store the coordinates of the center of the (0,0) pixel of the array that 
  // gets passed to PixelTempReco2D
  // Will add these values to the output of  PixelTempReco2D
  float tmp_x = float(row_offset) + 0.5f;
  float tmp_y = float(col_offset) + 0.5f;
  
  // Store these offsets (to be added later) in a LocalPoint after tranforming 
  // them from measurement units (pixel units) to local coordinates (cm)

  // ggiurgiu@jhu.edu 12/09/2010 : update call with trk angles needed for bow/kink corrections
  LocalPoint lp;
  
  if ( theClusterParam.with_track_angle )
    lp = theDetParam.theTopol->localPosition( MeasurementPoint(tmp_x, tmp_y), theClusterParam.loc_trk_pred );
  else
    {
      edm::LogError("PixelCPETemplateReco") 
    << "@SUB = PixelCPETemplateReco::localPosition" 
    << "Should never be here. PixelCPETemplateReco should always be called with track angles. This is a bad error !!! ";
      
      lp = theDetParam.theTopol->localPosition( MeasurementPoint(tmp_x, tmp_y) );
    }
    
  // Copy clust's pixels (calibrated in electrons) into clust_array_2d;
  for (int i=0 ; i!=theClusterParam.theCluster->size(); ++i ) 
    {
      auto pix = theClusterParam.theCluster->pixel(i);
      // *pixIter dereferences to Pixel struct, with public vars x, y, adc (all float)
      // 02/13/2008 ggiurgiu@fnal.gov: type of x, y and adc has been changed to unsigned char, unsigned short, unsigned short
      // in DataFormats/SiPixelCluster/interface/SiPixeltheClusterParam.theCluster->h so the type cast to int is redundant. Leave it there, it 
      // won't hurt. 
      int irow = int(pix.x) - row_offset;   // &&& do we need +0.5 ???
      int icol = int(pix.y) - col_offset;   // &&& do we need +0.5 ???
      
      // Gavril : what do we do here if the row/column is larger than cluster_matrix_size_x/cluster_matrix_size_y = 7/21 ?
      // Ignore them for the moment...
      if ( irow<cluster_matrix_size_x && icol<cluster_matrix_size_y )
    // 02/13/2008 ggiurgiu@fnal.gov typecast pixIter->adc to float
    clust_array_2d[irow][icol] = (float)pix.adc;
    }
  
  // Make and fill the bool arrays flagging double pixels
  std::vector<bool> ydouble(cluster_matrix_size_y), xdouble(cluster_matrix_size_x);
  // x directions (shorter), rows
  for (int irow = 0; irow < cluster_matrix_size_x; ++irow)
    {
      xdouble[irow] = theDetParam.theRecTopol->isItBigPixelInX( irow+row_offset );
    }
      
  // y directions (longer), columns
  for (int icol = 0; icol < cluster_matrix_size_y; ++icol) 
    {
      ydouble[icol] = theDetParam.theRecTopol->isItBigPixelInY( icol+col_offset );
    }

  // Output:
  float nonsense = -99999.9f; // nonsense init value
  theClusterParam.templXrec_ = theClusterParam.templYrec_ = theClusterParam.templSigmaX_ = theClusterParam.templSigmaY_ = nonsense;
  // If the template recontruction fails, we want to return 1.0 for now
  theClusterParam.templProbY_ = theClusterParam.templProbX_ = theClusterParam.templProbQ_ = 1.0f;
  theClusterParam.templQbin_ = 0;
  // We have a boolean denoting whether the reco failed or not
  theClusterParam.hasFilledProb_ = false;
    
  float templYrec1_ = nonsense;
  float templXrec1_ = nonsense;
  float templYrec2_ = nonsense;
  float templXrec2_ = nonsense;

  // ******************************************************************
  // Do it! Use cotalpha_ and cotbeta_ calculated in PixelCPEBase

 
  float locBz = theDetParam.bz;
    
  theClusterParam.ierr =
    PixelTempReco2D( ID, theClusterParam.cotalpha, theClusterParam.cotbeta,
             locBz, 
             clust_array_2d, ydouble, xdouble,
             templ,
             theClusterParam.templYrec_, theClusterParam.templSigmaY_, theClusterParam.templProbY_,
             theClusterParam.templXrec_, theClusterParam.templSigmaX_, theClusterParam.templProbX_, 
             theClusterParam.templQbin_, 
             speed_,
             theClusterParam.templProbQ_
             );

  // ******************************************************************

  // Check exit status
  if unlikely( theClusterParam.ierr != 0 ) 
    {
      LogDebug("PixelCPETemplateReco::localPosition") <<
    "reconstruction failed with error " << theClusterParam.ierr << "\n";

      // Gavril: what do we do in this case ? For now, just return the cluster center of gravity in microns
      // In the x case, apply a rough Lorentz drift average correction
      // To do: call PixelCPEGeneric whenever PixelTempReco2D fails
      float lorentz_drift = -999.9;
      if ( theDetParam.thePart == GeomDetEnumerators::PixelBarrel )
    lorentz_drift = 60.0f; // in microns
      else if ( theDetParam.thePart == GeomDetEnumerators::PixelEndcap )
    lorentz_drift = 10.0f; // in microns
      else 
    throw cms::Exception("PixelCPETemplateReco::localPosition :") 
      << "A non-pixel detector type in here?" << "\n";
      // ggiurgiu@jhu.edu, 21/09/2010 : trk angles needed to correct for bows/kinks
      if ( theClusterParam.with_track_angle )
    {
      theClusterParam.templXrec_ = theDetParam.theTopol->localX( theClusterParam.theCluster->x(), theClusterParam.loc_trk_pred ) - lorentz_drift * micronsToCm; // rough Lorentz drift correction
      theClusterParam.templYrec_ = theDetParam.theTopol->localY( theClusterParam.theCluster->y(), theClusterParam.loc_trk_pred ); 
    }
      else
    {
      edm::LogError("PixelCPETemplateReco") 
        << "@SUB = PixelCPETemplateReco::localPosition" 
        << "Should never be here. PixelCPETemplateReco should always be called with track angles. This is a bad error !!! ";
      
      theClusterParam.templXrec_ = theDetParam.theTopol->localX( theClusterParam.theCluster->x() ) - lorentz_drift * micronsToCm; // rough Lorentz drift correction
      theClusterParam.templYrec_ = theDetParam.theTopol->localY( theClusterParam.theCluster->y() );
    }
    }
  else if unlikely( UseClusterSplitter_ && theClusterParam.templQbin_ == 0 )
    {
      cout << " PixelCPETemplateReco : We should never be here !!!!!!!!!!!!!!!!!!!!!!" << endl;
      cout << "                 (int)UseClusterSplitter_ = " << (int)UseClusterSplitter_ << endl;

      //ierr = 
      //PixelTempSplit( ID, fpix, cotalpha_, cotbeta_, 
      //        clust_array_2d, ydouble, xdouble, 
      //        templ, 
      //        templYrec1_, templYrec2_, templSigmaY_, templProbY_,
      //        templXrec1_, templXrec2_, templSigmaX_, templProbX_, 
      //        templQbin_ );


      float dchisq;
      float templProbQ_;
      std::vector< SiPixelTemplateStore2D > thePixelTemp2D_;
      SiPixelTemplate2D::pushfile(ID, thePixelTemp2D_);
      SiPixelTemplate2D templ2D_(thePixelTemp2D_);
        
      theClusterParam.ierr =
    SiPixelTemplateSplit::PixelTempSplit( ID, theClusterParam.cotalpha, theClusterParam.cotbeta,
                          clust_array_2d, 
                          ydouble, xdouble,
                          templ,
                          templYrec1_, templYrec2_, theClusterParam.templSigmaY_, theClusterParam.templProbY_,
                          templXrec1_, templXrec2_, theClusterParam.templSigmaX_, theClusterParam.templProbX_,
                          theClusterParam.templQbin_, 
                          templProbQ_,
                          true, 
                          dchisq, 
                          templ2D_ );
      

      if ( theClusterParam.ierr != 0 )
    {
      LogDebug("PixelCPETemplateReco::localPosition") <<
        "reconstruction failed with error " << theClusterParam.ierr << "\n";
      
      // Gavril: what do we do in this case ? For now, just return the cluster center of gravity in microns
      // In the x case, apply a rough Lorentz drift average correction
      // To do: call PixelCPEGeneric whenever PixelTempReco2D fails
      float lorentz_drift = -999.9f;
      if ( theDetParam.thePart == GeomDetEnumerators::PixelBarrel )
        lorentz_drift = 60.0f; // in microns
      else if ( theDetParam.thePart == GeomDetEnumerators::PixelEndcap )
        lorentz_drift = 10.0f; // in microns
      else 
        throw cms::Exception("PixelCPETemplateReco::localPosition :") 
          << "A non-pixel detector type in here?" << "\n";

      // ggiurgiu@jhu.edu, 12/09/2010 : trk angles needed to correct for bows/kinks
      if ( theClusterParam.with_track_angle )
        {
          theClusterParam.templXrec_ = theDetParam.theTopol->localX( theClusterParam.theCluster->x(),theClusterParam.loc_trk_pred ) - lorentz_drift * micronsToCm; // rough Lorentz drift correction
          theClusterParam.templYrec_ = theDetParam.theTopol->localY( theClusterParam.theCluster->y(),theClusterParam.loc_trk_pred );
        }
      else
        {
          edm::LogError("PixelCPETemplateReco") 
        << "@SUB = PixelCPETemplateReco::localPosition" 
        << "Should never be here. PixelCPETemplateReco should always be called with track angles. This is a bad error !!! ";
          
          theClusterParam.templXrec_ = theDetParam.theTopol->localX( theClusterParam.theCluster->x() ) - lorentz_drift * micronsToCm; // very rough Lorentz drift correction
          theClusterParam.templYrec_ = theDetParam.theTopol->localY( theClusterParam.theCluster->y() );
          
        }
    }
      else
    {
      // go from micrometer to centimeter      
      templXrec1_ *= micronsToCm;
      templYrec1_ *= micronsToCm;     
      templXrec2_ *= micronsToCm;
      templYrec2_ *= micronsToCm;
      
      // go back to the module coordinate system   
      templXrec1_ += lp.x();
      templYrec1_ += lp.y();
      templXrec2_ += lp.x();
      templYrec2_ += lp.y();
      
      // calculate distance from each hit to the track and choose the 
      // hit closest to the track
      float distance11 = sqrt( (templXrec1_ - theClusterParam.trk_lp_x)*(templXrec1_ - theClusterParam.trk_lp_x) + 
                   (templYrec1_ - theClusterParam.trk_lp_y)*(templYrec1_ - theClusterParam.trk_lp_y) );
      
      float distance12 = sqrt( (templXrec1_ - theClusterParam.trk_lp_x)*(templXrec1_ - theClusterParam.trk_lp_x) + 
                   (templYrec2_ - theClusterParam.trk_lp_y)*(templYrec2_ - theClusterParam.trk_lp_y) );
      
      float distance21 = sqrt( (templXrec2_ - theClusterParam.trk_lp_x)*(templXrec2_ - theClusterParam.trk_lp_x) + 
                   (templYrec1_ - theClusterParam.trk_lp_y)*(templYrec1_ - theClusterParam.trk_lp_y) );
      
      float distance22 = sqrt( (templXrec2_ - theClusterParam.trk_lp_x)*(templXrec2_ - theClusterParam.trk_lp_x) + 
                   (templYrec2_ - theClusterParam.trk_lp_y)*(templYrec2_ - theClusterParam.trk_lp_y) );
      
      float min_templXrec_ = -999.9;
      float min_templYrec_ = -999.9;
      float distance_min = 9999999999.9;
      if ( distance11 < distance_min )
        {
          distance_min = distance11;
          min_templXrec_ = templXrec1_;
          min_templYrec_ = templYrec1_;
        }
      if ( distance12 < distance_min )
        {
          distance_min = distance12;
          min_templXrec_ = templXrec1_;
          min_templYrec_ = templYrec2_;
        }
      if ( distance21 < distance_min )
        {
          distance_min = distance21;
          min_templXrec_ = templXrec2_;
          min_templYrec_ = templYrec1_;
        }
      if ( distance22 < distance_min )
        {
          distance_min = distance22;
          min_templXrec_ = templXrec2_;
          min_templYrec_ = templYrec2_;
        }
          
      theClusterParam.templXrec_ = min_templXrec_;
      theClusterParam.templYrec_ = min_templYrec_;
    }
    } // else if ( UseClusterSplitter_ && templQbin_ == 0 )

  else // apparenly this is he good one!
    {
      // go from micrometer to centimeter      
      theClusterParam.templXrec_ *= micronsToCm;
      theClusterParam.templYrec_ *= micronsToCm;
      
      // go back to the module coordinate system 
      theClusterParam.templXrec_ += lp.x();
      theClusterParam.templYrec_ += lp.y();

      // Compute the Alignment Group Corrections [template ID should already be selected from call to reco procedure]
      if ( DoLorentz_ ) {
    // Do only if the lotentzshift has meaningfull numbers
    if( theDetParam.lorentzShiftInCmX!= 0.0 ||  theDetParam.lorentzShiftInCmY!= 0.0 ) {   
      // the LA width/shift returned by templates use (+)
      // the LA width/shift produced by PixelCPEBase for positive LA is (-)
      // correct this by iserting (-)
      //float temp1 = -micronsToCm*templ.lorxwidth();  // old
      //float temp2 = -micronsToCm*templ.lorywidth();  // does not incl 1/2
      float templateLorbiasCmX = -micronsToCm*templ.lorxbias();  // new 
      float templateLorbiasCmY = -micronsToCm*templ.lorybias(); //incl. 1/2
      // now, correctly, we can use the difference of shifts  
      //theClusterParam.templXrec_ += 0.5*(theDetParam.lorentzShiftInCmX - templateLorbiasCmX);
      //theClusterParam.templYrec_ += 0.5*(theDetParam.lorentzShiftInCmY - templateLorbiasCmY);
      theClusterParam.templXrec_ += (0.5*(theDetParam.lorentzShiftInCmX) - templateLorbiasCmX);
      theClusterParam.templYrec_ += (0.5*(theDetParam.lorentzShiftInCmY) - templateLorbiasCmY);
      //cout << "Templates: la lorentz offset = " 
      //   <<(0.5*(theDetParam.lorentzShiftInCmX)-templateLorbiasCmX)
      //   <<" "<<templateLorbiasCmX<<" "<<templateLorbiasCmY
      //   <<" "<<temp1<<" "<<temp2
      //   <<" "<<theDetParam.lorentzShiftInCmX
      //   <<" "<<theDetParam.lorentzShiftInCmY
      //   << endl; //dk
    } //else {cout<<" LA is 0, disable offset corrections "<<endl;} //dk
      } //else {cout<<" Do not do LA offset correction "<<endl;} //dk

    }
    
  // Save probabilities and qBin in the quantities given to us by the base class
  // (for which there are also inline getters).  &&& templProbX_ etc. should be retired...
  theClusterParam.probabilityX_  = theClusterParam.templProbX_;
  theClusterParam.probabilityY_  = theClusterParam.templProbY_;
  theClusterParam.probabilityQ_  = theClusterParam.templProbQ_;
  theClusterParam.qBin_          = theClusterParam.templQbin_;
  
  if ( theClusterParam.ierr == 0 ) // always true here
    theClusterParam.hasFilledProb_ = true;
  
  return LocalPoint( theClusterParam.templXrec_, theClusterParam.templYrec_ );      
  
}
  
//------------------------------------------------------------------
//  localError() relies on localPosition() being called FIRST!!!
//------------------------------------------------------------------
LocalError  
PixelCPETemplateReco::localError(DetParam const & theDetParam,  ClusterParam & theClusterParamBase) const 
{

  ClusterParamTemplate & theClusterParam = static_cast<ClusterParamTemplate &>(theClusterParamBase);

  //cout << endl;
  //cout << "Set PixelCPETemplate errors .............................................." << endl;

  //cout << "CPETemplate : " << endl;

  //--- Default is the maximum error used for edge clusters.
  const float sig12 = 1./sqrt(12.0);
  float xerr = theDetParam.thePitchX *sig12;
  float yerr = theDetParam.thePitchY *sig12;
  
  // Check if the errors were already set at the clusters splitting level
  if ( theClusterParam.theCluster->getSplitClusterErrorX() > 0.0f && theClusterParam.theCluster->getSplitClusterErrorX() < 7777.7f && 
       theClusterParam.theCluster->getSplitClusterErrorY() > 0.0f && theClusterParam.theCluster->getSplitClusterErrorY() < 7777.7f )
    {
      xerr = theClusterParam.theCluster->getSplitClusterErrorX() * micronsToCm;
      yerr = theClusterParam.theCluster->getSplitClusterErrorY() * micronsToCm;

      //cout << "Errors set at cluster splitting level : " << endl;
      //cout << "xerr = " << xerr << endl;
      //cout << "yerr = " << yerr << endl;
    }
  else
    {
      // If errors are not split at the cluster splitting level, set the errors here

      //cout  << "Errors are not split at the cluster splitting level, set the errors here : " << endl; 
       
      int maxPixelCol = theClusterParam.theCluster->maxPixelCol();
      int maxPixelRow = theClusterParam.theCluster->maxPixelRow();
      int minPixelCol = theClusterParam.theCluster->minPixelCol();
      int minPixelRow = theClusterParam.theCluster->minPixelRow();
      
      //--- Are we near either of the edges?
      bool edgex = ( theDetParam.theRecTopol->isItEdgePixelInX( minPixelRow ) || theDetParam.theRecTopol->isItEdgePixelInX( maxPixelRow ) );
      bool edgey = ( theDetParam.theRecTopol->isItEdgePixelInY( minPixelCol ) || theDetParam.theRecTopol->isItEdgePixelInY( maxPixelCol ) );
      
      if ( theClusterParam.ierr !=0 ) 
    {
      // If reconstruction fails the hit position is calculated from cluster center of gravity 
      // corrected in x by average Lorentz drift. Assign huge errors.
      //xerr = 10.0 * (float)theClusterParam.theCluster->sizeX() * xerr;
      //yerr = 10.0 * (float)theClusterParam.theCluster->sizeX() * yerr;
      
      // Assign better errors based on the residuals for failed template cases
      if ( theDetParam.thePart == GeomDetEnumerators::PixelBarrel )
        {
          xerr = 55.0f * micronsToCm;
          yerr = 36.0f * micronsToCm;
        }
      else if ( theDetParam.thePart == GeomDetEnumerators::PixelEndcap )
        {
          xerr = 42.0f * micronsToCm;
          yerr = 39.0f * micronsToCm;
        }
      else 
        throw cms::Exception("PixelCPETemplateReco::localError :") << "A non-pixel detector type in here?" ;

      //cout << "xerr = " << xerr << endl;
      //cout << "yerr = " << yerr << endl;
      
      //return LocalError(xerr*xerr, 0, yerr*yerr);
    }
      else if ( edgex || edgey )
    {
      // for edge pixels assign errors according to observed residual RMS 
      if      ( edgex && !edgey )
        {
          xerr = 23.0f * micronsToCm;
          yerr = 39.0f * micronsToCm;
        }
      else if ( !edgex && edgey )
        {
          xerr = 24.0f * micronsToCm;
          yerr = 96.0f * micronsToCm;
        }
      else if ( edgex && edgey )
        {
          xerr = 31.0f * micronsToCm;
          yerr = 90.0f * micronsToCm;
        }
      else
        {
          throw cms::Exception(" PixelCPETemplateReco::localError: Something wrong with pixel edge flag !!!");
        }

      //cout << "xerr = " << xerr << endl;
      //cout << "yerr = " << yerr << endl;
    }
      else 
    {
      // &&& need a class const
      //const float micronsToCm = 1.0e-4;
      
      xerr = theClusterParam.templSigmaX_ * micronsToCm;
      yerr = theClusterParam.templSigmaY_ * micronsToCm;
      
      //cout << "xerr = " << xerr << endl;
      //cout << "yerr = " << yerr << endl;

      // &&& should also check ierr (saved as class variable) and return
      // &&& nonsense (another class static) if the template fit failed.
    }       
      
      if (theVerboseLevel > 9) 
    {
      LogDebug("PixelCPETemplateReco") <<
        " Sizex = " << theClusterParam.theCluster->sizeX() << " Sizey = " << theClusterParam.theCluster->sizeY() << " Edgex = " << edgex << " Edgey = " << edgey << 
        " ErrX  = " << xerr            << " ErrY  = " << yerr;
    }

    } // else
  
  if ( !(xerr > 0.0f) )
    throw cms::Exception("PixelCPETemplateReco::localError") 
      << "\nERROR: Negative pixel error xerr = " << xerr << "\n\n";
  
  if ( !(yerr > 0.0f) )
    throw cms::Exception("PixelCPETemplateReco::localError") 
      << "\nERROR: Negative pixel error yerr = " << yerr << "\n\n";

  //cout << "Final errors set to: " << endl;
  //cout << "xerr = " << xerr << endl;
  //cout << "yerr = " << yerr << endl;
  //cout << "Out of PixelCPETemplateREco..........................................................................." << endl;
  //cout << endl;

  return LocalError(xerr*xerr, 0, yerr*yerr);
}