TrapezoidalCylindricalMFGrid Class Reference

#include <TrapezoidalCylindricalMFGrid.h>

Inheritance diagram for TrapezoidalCylindricalMFGrid:

Public Member Functions
void	dump () const
virtual LocalPoint	fromGridFrame (double a, double b, double c) const
	find grid coordinates for point. For debugging and validation only. More...
virtual void	toGridFrame (const LocalPoint &p, double &a, double &b, double &c) const
	find grid coordinates for point. For debugging and validation only. More...
	TrapezoidalCylindricalMFGrid (binary_ifstream &istr, const GloballyPositioned< float > &vol)
virtual LocalVector	uncheckedValueInTesla (const LocalPoint &p) const
	Interpolated field value at given point; does not check for exceptions. More...
Public Member Functions inherited from MFGrid3D
virtual Dimensions	dimensions (void) const
virtual Indexes	index (const LocalPoint &p) const
	MFGrid3D (const GloballyPositioned< float > &vol)
virtual LocalPoint	nodePosition (int i, int j, int k) const
	Position of node in local frame. More...
virtual LocalVector	nodeValue (int i, int j, int k) const
	Field value at node. More...
virtual LocalVector	valueInTesla (const LocalPoint &p) const
	Interpolated field value at given point. More...
Public Member Functions inherited from MFGrid
const GloballyPositioned< float > &	frame () const
	Local reference frame. More...
	MFGrid (const GloballyPositioned< float > &vol)
virtual	~MFGrid ()
Public Member Functions inherited from MagneticFieldProvider< float >
virtual LocalVectorType	derivativeInTeslaPerMeter (const LocalPointType &p, int N) const
virtual int	hasDerivatives () const
virtual LocalVectorType	valueInTesla (const LocalPointType &p) const =0
virtual	~MagneticFieldProvider ()

Private Attributes
Trapezoid2RectangleMappingX	mapping_

Additional Inherited Members
Public Types inherited from MFGrid
typedef GloballyPositioned < float >::GlobalPoint	GlobalPoint
typedef GloballyPositioned < float >::GlobalVector	GlobalVector
typedef GloballyPositioned < float >::LocalPoint	LocalPoint
typedef GloballyPositioned < float >::LocalVector	LocalVector
Public Types inherited from MagneticFieldProvider< float >
typedef Point3DBase< float, GlobalTag >	GlobalPointType
typedef Vector3DBase< float, GlobalTag >	GlobalVectorType
typedef Point3DBase< float, LocalTag >	LocalPointType
typedef Vector3DBase< float, LocalTag >	LocalVectorType
Protected Types inherited from MFGrid3D
typedef Basic3DVector< float >	BVector
typedef Grid3D	GridType
Protected Member Functions inherited from MFGrid3D
void	setGrid (const GridType &grid)
Protected Attributes inherited from MFGrid3D
GridType	grid_

Detailed Description

Definition at line 11 of file TrapezoidalCylindricalMFGrid.h.

Constructor & Destructor Documentation

TrapezoidalCylindricalMFGrid::TrapezoidalCylindricalMFGrid	(	binary_ifstream &	istr,
		const GloballyPositioned< float > &	vol
	)

Definition at line 10 of file TrapezoidalCylindricalMFGrid.cc.

References a, abs, b, gather_cfg::cout, delta, MFGrid::frame(), MFGrid3D::grid_, h, i, j, mapping_, submitDQMOfflineCAF::nLines, Geom::pi(), Trapezoid2RectangleMappingX::rectangle(), and GloballyPositioned< T >::toLocal().

  : MFGrid3D(vol)
{
  // The parameters read from the data files are given in global coordinates.
  // In version 85l, local frame has the same orientation of global frame for the reference
  // volume, i.e. the r.f. transformation is only a translation.
  // There is therefore no need to convert the field values to local coordinates.
  // Check this assumption: 
  GlobalVector localXDir(frame().toGlobal(LocalVector(1,0,0)));
  GlobalVector localYDir(frame().toGlobal(LocalVector(0,1,0)));

  if (localXDir.dot(GlobalVector(1,0,0)) > 0.999999 &&
      localYDir.dot(GlobalVector(0,1,0)) > 0.999999) {
    // "null" rotation - requires no conversion...
  } else {
    cout << "ERROR: TrapezoidalCylindricalMFGrid: unexpected orientation: x: " 
     << localXDir << " y: " << localYDir << endl;
  }

  int n1, n2, n3;
  inFile >> n1 >> n2 >> n3;
  double xref, yref, zref;
  inFile >> xref >> yref >> zref;
  double stepx, stepy, stepz;
  inFile >> stepx    >> stepy    >> stepz;

  double BasicDistance1[3][3];  // linear step
  double BasicDistance2[3][3];  // linear offset
  bool   easya, easyb, easyc;

  inFile >> BasicDistance1[0][0] >> BasicDistance1[1][0] >> BasicDistance1[2][0];
  inFile >> BasicDistance1[0][1] >> BasicDistance1[1][1] >> BasicDistance1[2][1];
  inFile >> BasicDistance1[0][2] >> BasicDistance1[1][2] >> BasicDistance1[2][2];
  inFile >> BasicDistance2[0][0] >> BasicDistance2[1][0] >> BasicDistance2[2][0];
  inFile >> BasicDistance2[0][1] >> BasicDistance2[1][1] >> BasicDistance2[2][1];
  inFile >> BasicDistance2[0][2] >> BasicDistance2[1][2] >> BasicDistance2[2][2];
  inFile >> easya >> easyb >> easyc;

  vector<BVector> fieldValues;
  float Bx, By, Bz;
  int nLines = n1*n2*n3;
  fieldValues.reserve(nLines);
  for (int iLine=0; iLine<nLines; ++iLine){
    inFile >> Bx >> By >> Bz;
    fieldValues.push_back(BVector(Bx,By,Bz));
  }
  // check completeness
  string lastEntry;
  inFile >> lastEntry;
  if (lastEntry != "complete") {
    cout << "ERROR during file reading: file is not complete" << endl;
  }

#ifdef DEBUG_GRID
  cout << "easya " << easya << " easyb " << easyb << " easyc " << easyc << endl;
#endif

  if (!easyb || !easyc) {
    throw MagGeometryError("TrapezoidalCartesianMFGrid only implemented for first coordinate");
  }

#ifdef DEBUG_GRID
  cout << "Grid reference point in grid system: " << xref << "," << yref << "," << zref << endl;
  cout << "steps " << stepx << "," <<  stepy << "," << stepz << endl;
  cout << "ns " << n1 << "," <<  n2 << "," << n3 << endl;

  for (int i=0; i<3; ++i) for (int j=0; j<3; ++j) {
    cout << "BasicDistance1[" << i << "][" << j << "] = " << BasicDistance1[i][j]
     << "BasicDistance2[" << i << "][" << j << "] = " << BasicDistance2[i][j] << endl;
  }
#endif

  // the "not easy" coordinate is x
  double a = stepx * (n1 -1);
  double b = a + BasicDistance1[0][1] * (n2-1)*(n1-1) + BasicDistance1[0][2] * (n3-1)*(n1-1);
  //  double h = stepy * (n2-1);
  double h = stepz * (n3-1);
  double delta = -BasicDistance2[0][1] * (n2-1) -BasicDistance2[0][2] * (n3-1);

#ifdef DEBUG_GRID
  cout << "Trapeze size (a,b,h) = " << a << "," << b << "," << h << endl;
#endif

  GlobalPoint grefp( GlobalPoint::Cylindrical( xref, Geom::pi() - yref, zref));
  LocalPoint lrefp = frame().toLocal( grefp);

#ifdef DEBUG_GRID
  cout << "Global origin " << grefp << endl;
  cout << "Local origin  " << lrefp << endl;
#endif

  double baMinus1 = BasicDistance1[0][2]*(n3-1) / stepx;
  if (std::abs(baMinus1) > 0.000001) {
    double b_over_a = 1 + baMinus1;
    double a1 = std::abs(baMinus1) > 0.000001 ? delta / baMinus1 : a/2;
#ifdef DEBUG_GRID
   cout << "a1 = " << a1 << endl;
#endif

    // transform reference point to grid frame
    double x0 = lrefp.perp() + a1;
    double y0 = lrefp.z() + h/2.;
    mapping_ = Trapezoid2RectangleMappingX( x0, y0, b_over_a, h);
  }
  else { // parallelogram
    mapping_ = Trapezoid2RectangleMappingX( 0, 0, delta/h);
  }
  double xrec, yrec;
  mapping_.rectangle( lrefp.perp(), lrefp.z(), xrec, yrec);

  Grid1D gridX( xrec, xrec + (a+b)/2., n1);
  Grid1D gridY( yref, yref + stepy*(n2-1), n2);
  Grid1D gridZ( yrec, yrec + h, n3);
  grid_ = GridType( gridX, gridY, gridZ, fieldValues);
    
  // Activate/deactivate timers
//   static SimpleConfigurable<bool> timerOn(false,"MFGrid:timing");
//   (*TimingReport::current()).switchOn("MagneticFieldProvider::valueInTesla(TrapezoidalCylindricalMFGrid)",timerOn);
}

Member Function Documentation

void TrapezoidalCylindricalMFGrid::dump ( void  ) const

virtual

Reimplemented from MFGrid.

Definition at line 131 of file TrapezoidalCylindricalMFGrid.cc.

{}

MFGrid::LocalPoint TrapezoidalCylindricalMFGrid::fromGridFrame ( double  a, double  b, double  c  ) const

virtual

find grid coordinates for point. For debugging and validation only.

Implements MFGrid.

Definition at line 157 of file TrapezoidalCylindricalMFGrid.cc.

References mapping_, and Trapezoid2RectangleMappingX::trapezoid().

{
  double rtrap, ztrap;
  mapping_.trapezoid( a, c, rtrap, ztrap);
  // FIXME: "OLD" convention of phi.
  //  return LocalPoint(LocalPoint::Cylindrical(rtrap, Geom::pi() - b, ztrap));
  return LocalPoint(LocalPoint::Cylindrical(rtrap, b, ztrap));
}

void TrapezoidalCylindricalMFGrid::toGridFrame ( const LocalPoint &  p, double &  a, double &  b, double &  c  ) const

virtual

find grid coordinates for point. For debugging and validation only.

Implements MFGrid.

Definition at line 147 of file TrapezoidalCylindricalMFGrid.cc.

References a, trackerHits::c, mapping_, and Trapezoid2RectangleMappingX::rectangle().

Referenced by uncheckedValueInTesla().

{
  mapping_.rectangle( p.perp(), p.z(), a, c);
  // FIXME: "OLD" convention of phi.
  //  b = Geom::pi() - p.phi();
  b = p.phi();
}

MFGrid::LocalVector TrapezoidalCylindricalMFGrid::uncheckedValueInTesla ( const LocalPoint &  p ) const

virtual

Interpolated field value at given point; does not check for exceptions.

Implements MFGrid3D.

Definition at line 135 of file TrapezoidalCylindricalMFGrid.cc.

References a, b, trackerHits::c, MFGrid::frame(), MFGrid3D::grid_, LinearGridInterpolator3D::interpolate(), toGridFrame(), and GloballyPositioned< T >::toLocal().

{
//   static TimingReport::Item & timer= (*TimingReport::current())["MagneticFieldProvider::valueInTesla(TrapezoidalCylindricalMFGrid)"];
//   TimeMe t(timer,false);

  LinearGridInterpolator3D interpol( grid_);
  double a, b, c;
  toGridFrame( p, a, b, c);
  GlobalVector gv( interpol.interpolate( a, b, c)); // grid in global frame
  return frame().toLocal(gv);           // must return a local vector
}

Member Data Documentation

Trapezoid2RectangleMappingX TrapezoidalCylindricalMFGrid::mapping_

private

Definition at line 27 of file TrapezoidalCylindricalMFGrid.h.

Referenced by fromGridFrame(), toGridFrame(), and TrapezoidalCylindricalMFGrid().