Trk::ProjectionMatricesSet Class Reference

the matrices to access the variably-dimensioned local parameters and map them to the defined five track parameters. More...

#include <ProjectionMatricesSet.h>

Collaboration diagram for Trk::ProjectionMatricesSet:

Public Member Functions
	ProjectionMatricesSet (int maxdim)
	Explicit constructor for 1-dimensional vector. More...
const Amg::MatrixX &	expansionMatrix (int mtx) const
	Expansion matrix return. More...
const Amg::MatrixX &	reductionMatrix (int mtx) const
	Reduction matrix return. More...
int	accessor (int mtx, ParamDefs par) const
	Accessors for members. More...

Private Attributes
int	m_maxdim
std::vector< Amg::MatrixX >	m_expansions
std::vector< Amg::MatrixX >	m_reductions
std::vector< std::vector< int > >	m_accessors

Detailed Description

the matrices to access the variably-dimensioned local parameters and map them to the defined five track parameters.

Author

Andre.nosp@m.as.S.nosp@m.alzbu.nosp@m.rger.nosp@m.@cern.nosp@m..ch

Definition at line 29 of file ProjectionMatricesSet.h.

Constructor & Destructor Documentation

ProjectionMatricesSet()

Trk::ProjectionMatricesSet::ProjectionMatricesSet

(

int

maxdim

)

Explicit constructor for 1-dimensional vector.

Definition at line 12 of file ProjectionMatricesSet.cxx.

                                                          :
    m_maxdim(maxdim)
{
  
  // the number of projection matrices is 2**(maxdim),
  // it is the possible number of binary numbers of with maxdim digits
  int numMatrices = int(pow(2,m_maxdim));
  
  for (int imatx=0; imatx<numMatrices; ++imatx){
 
    std::vector<int>  accessorInt(m_maxdim);
    std::vector<bool> parameterTag(m_maxdim);
    unsigned int cols = 0;
    for (int itag = 0, ipos = 1; itag < m_maxdim; ++itag, ipos *= 2) {
      bool bit = (imatx & ipos);
      parameterTag[itag] = bit;
      if (bit) {
        ++cols;
      }
    }
 
    //By default set zero 
    Amg::MatrixX reduction;
    reduction.setZero();
    Amg::MatrixX expansion;
    expansion.setZero();
    if (cols){      
      // rows and cols - initialized to zero
      reduction = Amg::MatrixX(m_maxdim, cols);
      reduction.setZero();
      // go through the rows and fill them
      int reduc = 0;
      for (int irow = 0; irow<m_maxdim; irow++)
      {
        int icol = irow - reduc;
        // avoids couting to col 4 for int(0b01111) = 15 matrix 
        icol = (icol < int(cols)) ? icol : cols-1;
        reduction(irow,icol) = parameterTag[irow] ? 1. : 0.;
        if (!parameterTag[irow])
        { 
           accessorInt[irow] = -100;
           ++reduc;
        } else {
          accessorInt[irow] = reduc;
        }
      }
      // the expansion matrix is the transposed reduction matrix
      expansion = Amg::MatrixX(reduction.transpose());
    } 
    // store them
    m_reductions.push_back(reduction);
    m_expansions.push_back(expansion);
    m_accessors.push_back(accessorInt);
  }
 
}

Member Function Documentation

accessor()

int Trk::ProjectionMatricesSet::accessor ( int  mtx, ParamDefs  par  ) const

inline

Accessors for members.

Definition at line 56 of file ProjectionMatricesSet.h.

{ return (par-(m_accessors[mtx])[par]); }

expansionMatrix()

const Amg::MatrixX & Trk::ProjectionMatricesSet::expansionMatrix ( int  mtx ) const

inline

Expansion matrix return.

Definition at line 52 of file ProjectionMatricesSet.h.

{ return m_expansions[mtx]; }

reductionMatrix()

const Amg::MatrixX & Trk::ProjectionMatricesSet::reductionMatrix ( int  mtx ) const

inline

Reduction matrix return.

Definition at line 54 of file ProjectionMatricesSet.h.

{ return m_reductions[mtx]; }

Member Data Documentation

m_accessors

std::vector<std::vector<int> > Trk::ProjectionMatricesSet::m_accessors

private

Definition at line 48 of file ProjectionMatricesSet.h.

m_expansions

std::vector<Amg::MatrixX> Trk::ProjectionMatricesSet::m_expansions

private

Definition at line 46 of file ProjectionMatricesSet.h.

m_maxdim

int Trk::ProjectionMatricesSet::m_maxdim

private

Definition at line 45 of file ProjectionMatricesSet.h.

m_reductions

std::vector<Amg::MatrixX> Trk::ProjectionMatricesSet::m_reductions

private

Definition at line 47 of file ProjectionMatricesSet.h.

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The documentation for this class was generated from the following files:

• ProjectionMatricesSet.h
• ProjectionMatricesSet.cxx