ParametersToParametersDerivatives.h

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#ifndef Alignment_CommonAlignmentParametrization_ParametersToParametersDerivatives_h
#define Alignment_CommonAlignmentParametrization_ParametersToParametersDerivatives_h


#include "DataFormats/Math/interface/AlgebraicROOTObjects.h"
#include "TMatrixD.h"

class Alignable;

class ParametersToParametersDerivatives
{
  public:
  ParametersToParametersDerivatives(const Alignable &component, const Alignable &mother);

  bool isOK() const { return isOK_;}

  double operator() (unsigned int indParMother, unsigned int indParComp) const; 

  // Not this - would make the internals public:
  //  const TMatrixD& matrix() const { return derivatives_;}

  private:
  bool init(const Alignable &component, int typeComponent,
        const Alignable &mother,    int typeMother);
  bool initRigidRigid(const Alignable &component, const Alignable &mother);
  bool initBowedRigid(const Alignable &component, const Alignable &mother);
  bool init2BowedRigid(const Alignable &component, const Alignable &mother);

  typedef ROOT::Math::SMatrix<double,6,9,ROOT::Math::MatRepStd<double,6,9> > AlgebraicMatrix69;
  AlgebraicMatrix69 dRigid_dBowed(const AlgebraicMatrix66 &dRigidM2dRigidC,
                  double halfWidth, double halfLength);

  bool            isOK_; 
  TMatrixD derivatives_; 
};

#endif