magfieldparam::BFit3D Class Reference

#include <BFit3D.h>

Public Member Functions
	BFit3D ()
double	GetBnom ()
double	GetBphi_k (const unsigned k)
double	GetBr_k (const unsigned k)
double	GetBz_k (const unsigned k)
double	GetC (const int k)
void	GetField (const double r, const double z, const double phi, double &Br, double &Bz, double &Bphi)
unsigned	GetLen ()
void	PrintBphiPoly (std::ostream &out=std::cout)
void	PrintBrPoly (std::ostream &out=std::cout)
void	PrintBzPoly (std::ostream &out=std::cout)
void	PrintPoly (std::ostream &out=std::cout)
void	PrintPtnPoly (std::ostream &out=std::cout)
void	SetField (const double B)
void	UseSignedRad (const bool flag=true)
void	UseSpline (const bool flag=true)
virtual	~BFit3D ()

Private Member Functions
void	SetCoeff_Linear (const double B)
void	SetCoeff_Spline (const double B)

Private Attributes
double	B_set
double	C [360]
HarmBasis3DCyl *	HB
bool	signed_rad
bool	use_spline

Static Private Attributes
static const double	B_nom [4]
static const double	C0 [360][4]
static const double	C1 [360][5]
static const double	C2 [360][3]

Detailed Description

Definition at line 9 of file BFit3D.h.

Constructor & Destructor Documentation

BFit3D()

magfieldparam::BFit3D::BFit3D ( )

inline

Definition at line 32 of file BFit3D.h.

: use_spline(false), signed_rad(true), B_set(0.), HB(new HarmBasis3DCyl(18)) {}

~BFit3D()

virtual magfieldparam::BFit3D::~BFit3D ( )

inlinevirtual

Definition at line 34 of file BFit3D.h.

References HB.

{ delete HB; }

Member Function Documentation

GetBnom()

double magfieldparam::BFit3D::GetBnom ( )

inline

Definition at line 57 of file BFit3D.h.

References B_set.

{ return B_set; }          //Ret. nominal field

GetBphi_k()

double magfieldparam::BFit3D::GetBphi_k ( const unsigned  k )

inline

Definition at line 64 of file BFit3D.h.

References magfieldparam::HarmBasis3DCyl::GetBphi_k(), HB, and dqmdumpme::k.

{ return HB->GetBphi_k(k); }

GetBr_k()

double magfieldparam::BFit3D::GetBr_k ( const unsigned  k )

inline

Definition at line 62 of file BFit3D.h.

References magfieldparam::HarmBasis3DCyl::GetBr_k(), HB, and dqmdumpme::k.

{ return HB->GetBr_k(k); }

GetBz_k()

double magfieldparam::BFit3D::GetBz_k ( const unsigned  k )

inline

Definition at line 63 of file BFit3D.h.

References magfieldparam::HarmBasis3DCyl::GetBz_k(), HB, and dqmdumpme::k.

{ return HB->GetBz_k(k); }

GetC()

double magfieldparam::BFit3D::GetC ( const int  k )

inline

Definition at line 58 of file BFit3D.h.

References C, and dqmdumpme::k.

{ return C[k]; }   //Ret. k-th expansion coefficient

GetField()

void BFit3D::GetField	(	const double	r,
		const double	z,
		const double	phi,
		double &	Br,
		double &	Bz,
		double &	Bphi
	)

Definition at line 73 of file BFit3D.cc.

References C, magfieldparam::HarmBasis3DCyl::EvalBphi(), magfieldparam::HarmBasis3DCyl::EvalBr(), magfieldparam::HarmBasis3DCyl::EvalBz(), magfieldparam::HarmBasis3DCyl::GetBphi(), magfieldparam::HarmBasis3DCyl::GetBr(), magfieldparam::HarmBasis3DCyl::GetBz(), HB, M_PI, magfieldparam::HarmBasis3DCyl::SetPoint(), and signed_rad.

                                                                                                            {
  //Return field components in Br, Bz, Bphi. SetField must be called before use.
  //
  if (signed_rad || (r >= 0.))
    HB->SetPoint(r, z, phi);
  else
    HB->SetPoint(-r, z, phi + M_PI);
  HB->EvalBr();
  HB->EvalBz();
  HB->EvalBphi();
  Br = HB->GetBr(C);
  Bz = HB->GetBz(C);
  Bphi = HB->GetBphi(C);
}

GetLen()

unsigned magfieldparam::BFit3D::GetLen ( )

inline

Definition at line 56 of file BFit3D.h.

References magfieldparam::HarmBasis3DCyl::GetLen(), and HB.

{ return HB->GetLen(); }  //Ret. the basis length

PrintBphiPoly()

void magfieldparam::BFit3D::PrintBphiPoly ( std::ostream &  out = std::cout )

inline

Definition at line 71 of file BFit3D.h.

References HB, MillePedeFileConverter_cfg::out, and magfieldparam::HarmBasis3DCyl::PrintBphiB().

{ HB->PrintBphiB(out); }

PrintBrPoly()

void magfieldparam::BFit3D::PrintBrPoly ( std::ostream &  out = std::cout )

inline

Definition at line 69 of file BFit3D.h.

References HB, MillePedeFileConverter_cfg::out, and magfieldparam::HarmBasis3DCyl::PrintBrB().

{ HB->PrintBrB(out); }

PrintBzPoly()

void magfieldparam::BFit3D::PrintBzPoly ( std::ostream &  out = std::cout )

inline

Definition at line 70 of file BFit3D.h.

References HB, MillePedeFileConverter_cfg::out, and magfieldparam::HarmBasis3DCyl::PrintBzB().

{ HB->PrintBzB(out); }

PrintPoly()

void magfieldparam::BFit3D::PrintPoly ( std::ostream &  out = std::cout )

inline

Definition at line 72 of file BFit3D.h.

References HB, MillePedeFileConverter_cfg::out, and magfieldparam::HarmBasis3DCyl::Print().

{ HB->Print(out); }

PrintPtnPoly()

void magfieldparam::BFit3D::PrintPtnPoly ( std::ostream &  out = std::cout )

inline

Definition at line 68 of file BFit3D.h.

References HB, MillePedeFileConverter_cfg::out, and magfieldparam::HarmBasis3DCyl::PrintPtB().

{ HB->PrintPtB(out); }

SetCoeff_Linear()

void BFit3D::SetCoeff_Linear ( const double  B )

private

Definition at line 11 of file BFit3D.cc.

References B, B_nom, C, C0, findQualityFiles::jj, and GetRecoTauVFromDQM_MC_cff::kk.

Referenced by SetField().

                                           {
  unsigned jj, kk = 1;
  double w_0, w_1, B_mod = fabs(B);
  if (B_mod <= B_nom[0]) {
    w_0 = B / B_nom[0];
    for (jj = 0; jj < 360; ++jj) {
      C[jj] = w_0 * C0[jj][0];
    }
  } else if (B_mod >= B_nom[3]) {
    w_0 = B / B_nom[3];
    for (jj = 0; jj < 360; ++jj) {
      C[jj] = w_0 * C0[jj][3];
    }
  } else {
    while (B_nom[kk] < B_mod)
      ++kk;  //Simple linear search
    w_1 = (B_mod - B_nom[kk - 1]) / (B_nom[kk] - B_nom[kk - 1]);
    w_0 = 1.0 - w_1;
    if (B < 0.) {
      w_0 = -w_0;
      w_1 = -w_1;
    }
    for (jj = 0; jj < 360; ++jj) {
      C[jj] = w_0 * C0[jj][kk - 1] + w_1 * C0[jj][kk];
    }
  }
}

SetCoeff_Spline()

void BFit3D::SetCoeff_Spline ( const double  B )

private

Definition at line 40 of file BFit3D.cc.

References B, B_nom, C, C0, C1, C2, and reco::ParticleMasses::k0.

Referenced by SetField().

                                           {
  int jc, k0 = 0, k1 = 1;
  double dB2, dB = fabs(B);
  if (dB >= B_nom[3]) {  //Linear extrapolation for a large field
    dB -= B_nom[3];
    for (jc = 0; jc < 360; ++jc)
      C[jc] = C0[jc][3] + C1[jc][4] * dB;
  } else {
    if (dB < B_nom[0]) {
      dB2 = dB * dB / (3. * B_nom[0]);
      for (jc = 0; jc < 360; ++jc)
        C[jc] = (C2[jc][0] * dB2 + C1[jc][0]) * dB;
    } else {
      while (B_nom[k1] < dB)
        ++k1;  //Simple linear search
      k0 = k1 - 1;
      dB2 = (dB -= B_nom[k0]) / (3. * (B_nom[k1] - B_nom[k0]));
      if (k1 < 3) {  //"Regular" interval
        for (jc = 0; jc < 360; ++jc)
          C[jc] = (((C2[jc][k1] - C2[jc][k0]) * dB2 + C2[jc][k0]) * dB + C1[jc][k1]) * dB + C0[jc][k0];
      } else {  //The last interval
        dB2 = (1. - dB2) * dB;
        for (jc = 0; jc < 360; ++jc)
          C[jc] = (C2[jc][k0] * dB2 + C1[jc][k1]) * dB + C0[jc][k0];
      }
    }
  }
  if (B < 0)
    for (jc = 0; jc < 360; ++jc)
      C[jc] = -C[jc];
}

SetField()

void magfieldparam::BFit3D::SetField ( const double  B )

inline

Definition at line 43 of file BFit3D.h.

References B, B_set, SetCoeff_Linear(), SetCoeff_Spline(), and use_spline.

                                  {
      if (use_spline)
        SetCoeff_Spline(B);
      else
        SetCoeff_Linear(B);
      B_set = B;
    }

UseSignedRad()

void magfieldparam::BFit3D::UseSignedRad ( const bool  flag = true )

inline

Definition at line 40 of file BFit3D.h.

References RemoveAddSevLevel::flag, and signed_rad.

{ signed_rad = flag; }

UseSpline()

void magfieldparam::BFit3D::UseSpline ( const bool  flag = true )

inline

Definition at line 37 of file BFit3D.h.

References RemoveAddSevLevel::flag, and use_spline.

{ use_spline = flag; }

Member Data Documentation

B_nom

const double magfieldparam::BFit3D::B_nom

staticprivate

Initial value:

= {2.02156567013928,
                                   3.51622117206486,
                                   3.81143026675623,  
                                   4.01242188708911}

Definition at line 12 of file BFit3D.h.

Referenced by SetCoeff_Linear(), and SetCoeff_Spline().

B_set

double magfieldparam::BFit3D::B_set

private

Definition at line 21 of file BFit3D.h.

Referenced by GetBnom(), and SetField().

C

double magfieldparam::BFit3D::C[360]

private

Definition at line 17 of file BFit3D.h.

Referenced by GetC(), GetField(), SetCoeff_Linear(), and SetCoeff_Spline().

C0

const double magfieldparam::BFit3D::C0

staticprivate

Definition at line 13 of file BFit3D.h.

Referenced by SetCoeff_Linear(), and SetCoeff_Spline().

C1

const double magfieldparam::BFit3D::C1

staticprivate

Definition at line 14 of file BFit3D.h.

Referenced by SetCoeff_Spline().

C2

const double magfieldparam::BFit3D::C2

staticprivate

Definition at line 15 of file BFit3D.h.

Referenced by SetCoeff_Spline().

HB

HarmBasis3DCyl* magfieldparam::BFit3D::HB

private

Definition at line 23 of file BFit3D.h.

Referenced by GetBphi_k(), GetBr_k(), GetBz_k(), GetField(), GetLen(), PrintBphiPoly(), PrintBrPoly(), PrintBzPoly(), PrintPoly(), PrintPtnPoly(), and ~BFit3D().

signed_rad

bool magfieldparam::BFit3D::signed_rad

private

Definition at line 20 of file BFit3D.h.

Referenced by GetField(), and UseSignedRad().

use_spline

bool magfieldparam::BFit3D::use_spline

private

Definition at line 19 of file BFit3D.h.

Referenced by SetField(), and UseSpline().