G4LatticePhysical.cc

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// $Id: G4LatticePhysical.cc 76883 2013-11-18 12:50:08Z gcosmo $
//
// 20131115  Save rotation results in local variable, report verbosely
// 20131116  Replace G4Transform3D with G4RotationMatrix

#include "G4LatticePhysical.hh"
#include "G4LatticeLogical.hh"
#include "G4PhysicalConstants.hh"
#include "G4RotationMatrix.hh"
#include "G4SystemOfUnits.hh"


// Unit vectors defined for convenience (avoid memory churn)

namespace {
  G4ThreeVector xhat(1,0,0), yhat(0,1,0), zhat(0,0,1), nullVec(0,0,0);
}


//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

G4LatticePhysical::G4LatticePhysical(const G4LatticeLogical* Lat,
                                     const G4RotationMatrix* Rot)
  : verboseLevel(0), fTheta(0), fPhi(0), fLattice(Lat) {
  SetPhysicalOrientation(Rot);
}

G4LatticePhysical::~G4LatticePhysical() {;}


//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

void G4LatticePhysical::SetPhysicalOrientation(const G4RotationMatrix* Rot) {
  if (!Rot) {                                   // No orientation specified
    fLocalToGlobal = fGlobalToLocal = G4RotationMatrix::IDENTITY;
  } else {
    fLocalToGlobal = fGlobalToLocal = *Rot;             // Frame rotation
    fGlobalToLocal.invert();
  }

  if (verboseLevel) {
    G4cout << "G4LatticePhysical::SetPhysicalOrientation " << *Rot
           << "\nfLocalToGlobal: " << fLocalToGlobal
           << "\nfGlobalToLocal: " << fGlobalToLocal
           << G4endl;
  }
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

void G4LatticePhysical::SetLatticeOrientation(G4double t_rot, G4double p_rot) {
  fTheta = t_rot;
  fPhi = p_rot;

  if (verboseLevel) 
    G4cout << "G4LatticePhysical::SetLatticeOrientation " << fTheta << " "
           << fPhi << G4endl;
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

void G4LatticePhysical::SetMillerOrientation(G4int l, G4int k, G4int n) {
  fTheta = halfpi - std::atan2(n+0.000001,l+0.000001);
  fPhi = halfpi - std::atan2(l+0.000001,k+0.000001);

  if (verboseLevel) 
    G4cout << "G4LatticePhysical::SetMillerOrientation(" << l << k << n 
           << ") : " << fTheta << " " << fPhi << G4endl;
}


//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

//Loads the group velocity in m/s
G4double G4LatticePhysical::MapKtoV(G4int polarizationState,
                                    G4ThreeVector k) const {
  if (verboseLevel>1) G4cout << "G4LatticePhysical::MapKtoV " << k << G4endl;

  k.rotate(yhat,fTheta).rotate(zhat, fPhi);
  return fLattice->MapKtoV(polarizationState, k);
}

//Loads the normalized direction vector along VG
G4ThreeVector G4LatticePhysical::MapKtoVDir(G4int polarizationState,
                                            G4ThreeVector k) const {
  if (verboseLevel>1) G4cout << "G4LatticePhysical::MapKtoVDir " << k << G4endl;

  k.rotate(yhat,fTheta).rotate(zhat,fPhi);

  G4ThreeVector VG = fLattice->MapKtoVDir(polarizationState, k);  

  return VG.rotate(zhat,-fPhi).rotate(yhat,-fTheta);
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

// Apply orientation transforms to specified vector

G4ThreeVector 
G4LatticePhysical::RotateToGlobal(const G4ThreeVector& dir) const {
  if (verboseLevel>1) {
    G4cout << "G4LatticePhysical::RotateToGlobal " << dir
           << "\nusing fLocalToGlobal " << fLocalToGlobal
           << G4endl;
  }

  G4ThreeVector result = fLocalToGlobal*dir;
  if (verboseLevel>1) G4cout << " result " << result << G4endl;

  return result;
}

G4ThreeVector 
G4LatticePhysical::RotateToLocal(const G4ThreeVector& dir) const {
  if (verboseLevel>1) {
    G4cout << "G4LatticePhysical::RotateToLocal " << dir
           << "\nusing fGlobalToLocal " << fGlobalToLocal
           << G4endl;
  }

  G4ThreeVector result = fGlobalToLocal*dir;
  if (verboseLevel>1) G4cout << " result " << result << G4endl;

  return result;
}