Class stores a grid of magnetic field values in XY slice at Z position. More...

#include <LitFieldGrid.h>

Public Member Functions
	LitFieldGrid ()
	Constructor.

fscal	GetZ () const
	Returns Z position of the grid.

void	SetZ (fscal Z)
	Sets Z position of the grid.

void	SetField (const vector< vector< LitFieldValue< fscal > > > &field, fscal xmin, fscal xmax, fscal ymin, fscal ymax, int nofBinsX, int nofBinsY)
	Set field values for the grid.

void	GetFieldValue (fscal x, fscal y, LitFieldValue< fscal > &B) const
	Return field value for (X, Y) position (scalar version).

void	GetFieldValue (fvec x, fvec y, LitFieldValue< fvec > &B) const
	Returns field value for (X, Y) position (SIMD version).

bool	IsEmpty () const
	Check if field was set.

string	ToString () const
	Returns string representation of the class.

Private Attributes
fscal	fXMin

fscal	fXMax

fscal	fYMin

fscal	fYMax

fscal	fZ

unsigned short	fNofBinsX

unsigned short	fNofBinsY

fscal	fBinSizeX

fscal	fBinSizeY

vector< vector< LitFieldValue< fscal > > >	fField

Friends
ostream &	operator<< (ostream &strm, const LitFieldGrid &grid)
	Operator << for convenient output to ostream.

Detailed Description

Class stores a grid of magnetic field values in XY slice at Z position.

Author: Andrey Lebedev andre.nosp@m.y.le.nosp@m.bedev.nosp@m.@gsi.nosp@m..de

Date: 2009

This approach is used as an alternative to parabolic field approximation. It is more precise - the same grid is used as in the full magnetic field map. However the access to the grid can not be SIMDized. And the values are accessed one by one and packed later to the vector. But it is still fast! The value of the field is calculated as a weighted mean of the four surrounding values.

Definition at line 51 of file LitFieldGrid.h.

Constructor & Destructor Documentation

◆ LitFieldGrid()

lit::parallel::LitFieldGrid::LitFieldGrid ( )

inline

Constructor.

Definition at line 56 of file LitFieldGrid.h.

References fBinSizeX, fBinSizeY, fField, fNofBinsX, fNofBinsY, fXMax, fXMin, fYMax, fYMin, and fZ.

Referenced by operator<<.

Member Function Documentation

◆ GetFieldValue() [1/2]

void lit::parallel::LitFieldGrid::GetFieldValue	(	fscal	x,
		fscal	y,
		LitFieldValue< fscal > &	B ) const

inline

Return field value for (X, Y) position (scalar version).

Parameters

[in]	x	X position.
[in]	y	Y position.
[out]	B	Field value.

Definition at line 118 of file LitFieldGrid.h.

References fBinSizeX, fBinSizeY, fField, fNofBinsX, fNofBinsY, fXMax, fXMin, fYMin, x, and y.

Referenced by GetFieldValue(), and lit::parallel::LitRK4Extrapolation().

◆ GetFieldValue() [2/2]

void lit::parallel::LitFieldGrid::GetFieldValue	(	fvec	x,
		fvec	y,
		LitFieldValue< fvec > &	B ) const

inline

Returns field value for (X, Y) position (SIMD version).

Parameters

[in]	x	X position.
[in]	y	Y position.
[out]	B	Field value.

Definition at line 183 of file LitFieldGrid.h.

References GetFieldValue(), cbm::algo::kf::fvec::size(), v, x, and y.

◆ GetZ()

fscal lit::parallel::LitFieldGrid::GetZ ( ) const

inline

Returns Z position of the grid.

Returns: Z position of the grid.

Definition at line 74 of file LitFieldGrid.h.

References fZ.

◆ IsEmpty()

bool lit::parallel::LitFieldGrid::IsEmpty ( ) const

inline

Check if field was set.

Definition at line 200 of file LitFieldGrid.h.

References fField.

Referenced by lit::parallel::LitTrackFitter(), lit::parallel::LitTrackFinderNN::PropagateToStation(), and lit::parallel::LitTrackFinderNN::PropagateVirtualStations().

◆ SetField()

void lit::parallel::LitFieldGrid::SetField	(	const vector< vector< LitFieldValue< fscal > > > &	field,
		fscal	xmin,
		fscal	xmax,
		fscal	ymin,
		fscal	ymax,
		int	nofBinsX,
		int	nofBinsY )

inline

Set field values for the grid.

Grid is a rectangle with (xmin, ymax) as a top left corner and (xmax, ymin) as a bottom right corner and has a total number of bins nofBinsX*nofBinsY.

Parameters

[in]	field	2D vector of field values.
[in]	xmax	Maximum X position.
[in]	xmin	Minimum X position.
[in]	ymax	Maximum Y position.
[in]	ymin	Minimum Y position.
[in]	nofBinsX	Number of bins in X.
[in]	nofBinsY	Number of bins in Y.