Acts::InterpolatedBFieldMap< grid_t >::FieldCell Struct Reference

struct representing smallest grid unit in magnetic field grid More...

#include <Acts/MagneticField/InterpolatedBFieldMap.hpp>

Public Member Functions
	FieldCell (std::array< double, DIM_POS > lowerLeft, std::array< double, DIM_POS > upperRight, std::array< Vector3, N > fieldValues)
	default constructor
Vector3	getField (const ActsVector< DIM_POS > &position) const
	retrieve field at given position
bool	isInside (const ActsVector< DIM_POS > &position) const
	check whether given 3D position is inside this field cell

Static Public Attributes
static constexpr unsigned int	N = 1 << DIM_POS
	number of corner points defining the confining hyper-box

Detailed Description

template<typename grid_t>
struct Acts::InterpolatedBFieldMap< grid_t >::FieldCell

struct representing smallest grid unit in magnetic field grid

This type encapsulates all required information to perform linear interpolation of magnetic field values within a confined spatial region (hyper-box). The cell stores field values at all corner points and performs interpolation for any position within the cell boundaries. This allows for efficient repeated lookups within the same grid cell without consulting the full grid structure.

Constructor & Destructor Documentation

FieldCell()

template<typename grid_t>

Acts::InterpolatedBFieldMap< grid_t >::FieldCell::FieldCell	(	std::array< double, DIM_POS >	lowerLeft,
		std::array< double, DIM_POS >	upperRight,
		std::array< Vector3, N >	fieldValues )

default constructor

Parameters

[in]	lowerLeft	generalized lower-left corner of hyper box (containing the minima of the hyper box along each Dimension)
[in]	upperRight	generalized upper-right corner of hyper box (containing the maxima of the hyper box along each Dimension)
[in]	fieldValues	field values at the hyper box corners sorted in the canonical order defined in Acts::interpolate

Member Function Documentation

getField()

template<typename grid_t>

Vector3 Acts::InterpolatedBFieldMap< grid_t >::FieldCell::getField

(

const ActsVector< DIM_POS > &

position

)

const

retrieve field at given position

Parameters

[in]

position

global 3D position

Returns

magnetic field value at the given position

Precondition

The given position must lie within the current field cell.

isInside()

template<typename grid_t>

bool Acts::InterpolatedBFieldMap< grid_t >::FieldCell::isInside

(

const ActsVector< DIM_POS > &

position

)

const

check whether given 3D position is inside this field cell

Parameters

[in]

position

global 3D position

Returns

true if position is inside the current field cell, otherwise false

Member Data Documentation

N

template<typename grid_t>

unsigned int Acts::InterpolatedBFieldMap< grid_t >::FieldCell::N = 1 << DIM_POS

staticconstexpr

number of corner points defining the confining hyper-box