Class for a CylinderSurface in the TrackingGeometry. More...

#include <Acts/Surfaces/CylinderSurface.hpp>

Inheritance diagram for Acts::CylinderSurface:

Collaboration diagram for Acts::CylinderSurface:

Public Member Functions
AlignmentToPathMatrix	alignmentToPathDerivative (const GeometryContext &gctx, const Vector3 &position, const Vector3 &direction) const final
	Calculate the derivative of path length at the geometry constraint or point-of-closest-approach w.r.t.
void	assignSurfaceBounds (std::shared_ptr< const CylinderBounds > newBounds)
	Overwrite the existing surface bounds with new ones.
void	assignSurfaceMaterial (std::shared_ptr< const ISurfaceMaterial > material) override
	Assign the surface material description.
const CylinderBounds &	bounds () const final
	This method returns the CylinderBounds by reference.
const std::shared_ptr< const CylinderBounds > &	boundsPtr () const
	This method returns the shared_ptr to the CylinderBounds.
Result< Vector2 >	globalToLocal (const GeometryContext &gctx, const Vector3 &position, const Vector3 &direction, double tolerance=s_onSurfaceTolerance) const final
	Convert a global position to a local one this is the most generic interface, which is implemented by all surfaces.
Result< Vector2 >	globalToLocal (const GeometryContext &gctx, const Vector3 &position, double tolerance=s_onSurfaceTolerance) const final
	Global to local transformation.
MultiIntersection3D	intersect (const GeometryContext &gctx, const Vector3 &position, const Vector3 &direction, const BoundaryTolerance &boundaryTolerance=BoundaryTolerance::Infinite(), double tolerance=s_onSurfaceTolerance) const final
	Straight line intersection schema from position/direction.
Matrix< 2, 3 >	localCartesianToBoundLocalDerivative (const GeometryContext &gctx, const Vector3 &position) const final
	Calculate the derivative of bound track parameters local position w.r.t.
Vector3	localToGlobal (const GeometryContext &gctx, const Vector2 &lposition) const final
	Local to global transformation.
Vector3	localToGlobal (const GeometryContext &gctx, const Vector2 &lposition, const Vector3 &direction) const final
	Local to global transformation.
std::pair< std::shared_ptr< CylinderSurface >, bool >	mergedWith (const CylinderSurface &other, AxisDirection direction, bool externalRotation, const Logger &logger=getDummyLogger()) const
	Merge two cylinder surfaces into a single one.
std::string	name () const override
	Return method for properly formatted output string.
Vector3	normal (const GeometryContext &gctx, const Vector2 &lposition) const final
	Return method for surface normal information.
Vector3	normal (const GeometryContext &gctx, const Vector3 &pos, const Vector3 &direction) const final
	Calculate the normal vector of the surface This overload is fully generic, fulfills the Surface interface and accepts a global position and a direction.
Vector3	normal (const GeometryContext &gctx, const Vector3 &position) const final
	Return method for surface normal information.
CylinderSurface &	operator= (const CylinderSurface &other)
	Assignment operator.
double	pathCorrection (const GeometryContext &gctx, const Vector3 &position, const Vector3 &direction) const final
	Path correction due to incident of the track.
Polyhedron	polyhedronRepresentation (const GeometryContext &gctx, unsigned int quarterSegments=2u) const override
	Return a Polyhedron for a cylinder.
RotationMatrix3	referenceFrame (const GeometryContext &gctx, const Vector3 &position, const Vector3 &direction) const final
	Return the measurement frame - this is needed for alignment, in particular The measurement frame of a cylinder is the tangential plane at a given position.
Vector3	referencePosition (const GeometryContext &gctx, AxisDirection aDir) const final
	The binning position method - is overloaded for r-type binning.
virtual Vector3	rotSymmetryAxis (const GeometryContext &gctx) const
	Return method for the rotational symmetry axis.
SurfaceType	type () const override
	Return the surface type.
Public Member Functions inherited from Acts::RegularSurface
Result< Vector2 >	globalToLocal (const GeometryContext &gctx, const Vector3 &position, const Vector3 &direction, double tolerance=s_onSurfaceTolerance) const final
	Convert a global position to a local one this is the most generic interface, which is implemented by all surfaces.
bool	isOnSurface (const GeometryContext &gctx, const Vector3 &position, const BoundaryTolerance &boundaryTolerance=BoundaryTolerance::None(), double tolerance=s_onSurfaceTolerance) const
	The geometric onSurface method.
bool	isOnSurface (const GeometryContext &gctx, const Vector3 &position, const Vector3 &direction, const BoundaryTolerance &boundaryTolerance=BoundaryTolerance::None(), double tolerance=s_onSurfaceTolerance) const
	The geometric onSurface method.
Vector3	localToGlobal (const GeometryContext &gctx, const Vector2 &lposition, const Vector3 &direction) const final
	Local to global transformation.
Vector3	normal (const GeometryContext &gctx, const Vector3 &pos, const Vector3 &direction) const final
	Calculate the normal vector of the surface This overload is fully generic, fulfills the Surface interface and accepts a global position and a direction.
	Surface (const GeometryContext &gctx, const Surface &other, const Transform3 &shift) noexcept
	Copy constructor with optional shift.
	Surface (const Surface &other) noexcept=default
	Copy constructor.
	Surface (const SurfacePlacementBase &placement) noexcept
	Constructor from SurfacePlacement: Element proxy.
	Surface (const Transform3 &transform=Transform3::Identity())
	Constructor with Transform3 as a shared object.
Public Member Functions inherited from Acts::Surface
AlignmentToBoundMatrix	alignmentToBoundDerivative (const GeometryContext &gctx, const Vector3 &position, const Vector3 &direction, const FreeVector &pathDerivative) const
	The derivative of bound track parameters w.r.t.
void	assignIsSensitive (bool isSensitive)
	Assign whether the surface is sensitive.
void	assignSurfacePlacement (const SurfacePlacementBase &placement)
	Assign a placement object which may dynamically align the surface in space.
void	assignThickness (double thick)
	Assign the thickness of the surface in the orthogonal dimension.
const Layer *	associatedLayer () const
	Return method for the associated Layer in which the surface is embedded.
void	associateLayer (const Layer &lay)
	Set Associated Layer Many surfaces can be associated to a Layer, but it might not be known yet during construction of the layer, this can be set afterwards.
virtual BoundToFreeMatrix	boundToFreeJacobian (const GeometryContext &gctx, const Vector3 &position, const Vector3 &direction) const
	Calculate the jacobian from local to global which the surface knows best, hence the calculation is done here.
virtual Vector3	center (const GeometryContext &gctx) const
	Return method for the surface center.
virtual Vector2	closestPointOnBoundary (const Vector2 &lposition, const SquareMatrix2 &metric) const
	Calculates the closest point on the boundary of the surface to a given point in local coordinates.
virtual double	distanceToBoundary (const Vector2 &lposition) const
	Calculates the distance to the boundary of the surface from a given point in local coordinates.
virtual FreeToBoundMatrix	freeToBoundJacobian (const GeometryContext &gctx, const Vector3 &position, const Vector3 &direction) const
	Calculate the jacobian from global to local which the surface knows best, hence the calculation is done here.
virtual FreeToPathMatrix	freeToPathDerivative (const GeometryContext &gctx, const Vector3 &position, const Vector3 &direction) const
	Calculate the derivative of path length at the geometry constraint or point-of-closest-approach w.r.t.
std::shared_ptr< Surface >	getSharedPtr ()
	Retrieve a `std::shared_ptr` for this surface (non-const version).
std::shared_ptr< const Surface >	getSharedPtr () const
	Retrieve a `std::shared_ptr` for this surface (const version).
bool	hasMaterial () const
	Check if the surface has an associated material description.
virtual bool	insideBounds (const Vector2 &lposition, const BoundaryTolerance &boundaryTolerance=BoundaryTolerance::None()) const
	The insideBounds method for local positions.
bool	isAlignable () const
	Returns whether the Surface is alignable.
bool	isOnSurface (const GeometryContext &gctx, const Vector3 &position, const Vector3 &direction, const BoundaryTolerance &boundaryTolerance=BoundaryTolerance::None(), double tolerance=s_onSurfaceTolerance) const
	The geometric onSurface method.
bool	isSensitive () const
	Returns whether the Surface is sensitive.
const Transform3 &	localToGlobalTransform (const GeometryContext &gctx) const
	Return method for the surface Transform3 by reference In case a detector element is associated the surface transform is just forwarded to the detector element in order to keep the (mis-)alignment cache cetrally handled.
virtual const MaterialSlab &	materialSlab (const Vector2 &lp) const
	Return method for full material description of the Surface.
virtual MaterialSlab	materialSlab (const Vector2 &lp, Direction pDir, MaterialUpdateMode mode) const
	Return method for fully scaled material description of the Surface.
Surface &	operator= (const Surface &other) noexcept=default
	Assignment operator.
bool	operator== (const Surface &other) const
	Comparison (equality) operator The strategy for comparison is (a) first pointer comparison (b) then type comparison (c) then bounds comparison (d) then transform comparison.
const ISurfaceMaterial *	surfaceMaterial () const
	Return method for the associated Material to this surface.
const std::shared_ptr< const ISurfaceMaterial > &	surfaceMaterialSharedPtr () const
	Return method for the shared pointer to the associated Material.
const SurfacePlacementBase *	surfacePlacement () const
	Return the associated surface placement if there is any.
double	thickness () const
	Return the thickness of the surface in the normal direction.
GeometryContextOstreamWrapper< Surface >	toStream (const GeometryContext &gctx) const
	Helper method for printing: the returned object captures the surface and the geometry context and will print the surface.
std::string	toString (const GeometryContext &gctx) const
	Output into a std::string.
void	visualize (IVisualization3D &helper, const GeometryContext &gctx, const ViewConfig &viewConfig=s_viewSurface) const
	Visualize the surface for debugging and inspection.
Public Member Functions inherited from Acts::GeometryObject
	GeometryObject ()=default
	Defaulted constructor.
	GeometryObject (const GeometryIdentifier &geometryId)
	Constructor from a value.
	GeometryObject (const GeometryObject &)=default
	Defaulted copy constructor.
void	assignGeometryId (const GeometryIdentifier &geometryId)
	Set the value.
GeometryIdentifier	geometryId () const
virtual double	referencePositionValue (const GeometryContext &gctx, AxisDirection aDir) const
	Implement the binningValue.

Protected Member Functions
	CylinderSurface (const CylinderSurface &other)
	Copy constructor.
	CylinderSurface (const GeometryContext &gctx, const CylinderSurface &other, const Transform3 &shift)
	Copy constructor - with shift.
	CylinderSurface (const Transform3 &transform, double radius, double halfz, double halfphi=std::numbers::pi, double avphi=0., double bevelMinZ=0., double bevelMaxZ=0.)
	Constructor from Transform3 and CylinderBounds.
	CylinderSurface (const Transform3 &transform, std::shared_ptr< const CylinderBounds > cbounds)
	Constructor from Transform3 and CylinderBounds arguments.
	CylinderSurface (std::shared_ptr< const CylinderBounds > cbounds, const SurfacePlacementBase &placement)
	Constructor from SurfacePlacementBase: Element proxy.
std::array< AxisDirection, 2 >	localAxes () const override
	Local axes of the surface.
Vector2	transformSurfaceLocalToMaterialLocal (const Vector2 &surfaceLocal) const override
	Transform surface local coordinates to material local coordinates.
Protected Member Functions inherited from Acts::Surface
	Surface (const GeometryContext &gctx, const Surface &other, const Transform3 &shift) noexcept
	Copy constructor with optional shift.
	Surface (const Surface &other) noexcept=default
	Copy constructor.
	Surface (const SurfacePlacementBase &placement) noexcept
	Constructor from SurfacePlacement: Element proxy.
	Surface (const Transform3 &transform=Transform3::Identity())
	Constructor with Transform3 as a shared object.
virtual std::ostream &	toStreamImpl (const GeometryContext &gctx, std::ostream &sl) const
	Output Method for std::ostream, to be overloaded by child classes.

Protected Attributes
std::shared_ptr< const CylinderBounds >	m_bounds
	bounds (shared)
Protected Attributes inherited from Acts::Surface
std::shared_ptr< const ISurfaceMaterial >	m_surfaceMaterial
	Possibility to attach a material description.
bool	m_swapMaterialAxes {false}
	Whether to swap the local coordinates for material lookup.
CloneablePtr< const Transform3 >	m_transform
	Transform3 definition that positions (translation, rotation) the surface in global space.
Protected Attributes inherited from Acts::GeometryObject
GeometryIdentifier	m_geometryId
	Unique geometry identifier for this object.

Additional Inherited Members
Public Types inherited from Acts::Surface
enum	SurfaceType { Cone = 0 , Cylinder = 1 , Disc = 2 , Perigee = 3 , Plane = 4 , Straw = 5 , Curvilinear = 6 , Other = 7 }
	This enumerator simplifies the persistency & calculations, by saving a dynamic_cast, e.g. More...
Static Public Member Functions inherited from Acts::Surface
template<class T, typename... Args>
static std::shared_ptr< T >	makeShared (Args &&... args)
	Factory for producing memory managed instances of Surface.
Static Public Attributes inherited from Acts::Surface
static constexpr std::array< std::string_view, Surface::SurfaceType::Other+1 >	s_surfaceTypeNames
	Helper strings for screen output.

Detailed Description

Class for a CylinderSurface in the TrackingGeometry.

It inherits from Surface.

The cylinder surface has a special role in the TrackingGeometry, since it builds the surfaces of all TrackingVolumes at container level for a cylindrical tracking geometry.

Constructor & Destructor Documentation

◆ CylinderSurface() [1/5]

Acts::CylinderSurface::CylinderSurface	(	const Transform3 &	transform,
		double	radius,
		double	halfz,
		double	halfphi = std::numbers::pi,
		double	avphi = 0.,
		double	bevelMinZ = 0.,
		double	bevelMaxZ = 0. )

protected

Constructor from Transform3 and CylinderBounds.

Parameters

transform	The transform to position the surface
radius	The radius of the cylinder
halfz	The half length in z
halfphi	The half opening angle
avphi	The phi value from which the opening angle spans (both sides)
bevelMinZ	(optional) The bevel on the negative z side
bevelMaxZ	(optional) The bevel on the positive z sid The bevel on the positive z side

◆ CylinderSurface() [2/5]

Acts::CylinderSurface::CylinderSurface	(	const Transform3 &	transform,
		std::shared_ptr< const CylinderBounds >	cbounds )

protected

Constructor from Transform3 and CylinderBounds arguments.

Parameters

transform	The transform to position the surface
cbounds	is a shared pointer to a cylindeer bounds object, it must exist (assert test)

◆ CylinderSurface() [3/5]

Acts::CylinderSurface::CylinderSurface	(	std::shared_ptr< const CylinderBounds >	cbounds,
		const SurfacePlacementBase &	placement )

protected

Constructor from SurfacePlacementBase: Element proxy.

Parameters

cbounds	are the provided cylinder bounds (shared)
placement	Reference to the surface placement

Note: The Surface does not take any ownership over the SurfacePlacementBase it is expected that the user ensures the life-time of the SurfacePlacementBase and that the Surface is actually owned by the SurfacePlacementBase instance

◆ CylinderSurface() [4/5]

Acts::CylinderSurface::CylinderSurface ( const CylinderSurface & other )

protected

Copy constructor.

Parameters

other is the source cylinder for the copy

◆ CylinderSurface() [5/5]

Acts::CylinderSurface::CylinderSurface	(	const GeometryContext &	gctx,
		const CylinderSurface &	other,
		const Transform3 &	shift )

protected

Copy constructor - with shift.

Parameters

gctx	The current geometry context object, e.g. alignment
other	is the source cone surface
shift	is the additional transform applied after copying

Member Function Documentation

◆ alignmentToPathDerivative()

AlignmentToPathMatrix Acts::CylinderSurface::alignmentToPathDerivative	(	const GeometryContext &	gctx,
		const Vector3 &	position,
		const Vector3 &	direction ) const

finalvirtual

Calculate the derivative of path length at the geometry constraint or point-of-closest-approach w.r.t.

alignment parameters of the surface (i.e. local frame origin in global 3D Cartesian coordinates and its rotation represented with extrinsic Euler angles)

Parameters

gctx	The current geometry context object, e.g. alignment
position	global 3D position
direction	global 3D momentum direction

Returns: Derivative of path length w.r.t. the alignment parameters

Reimplemented from Acts::Surface.

◆ assignSurfaceBounds()

void Acts::CylinderSurface::assignSurfaceBounds ( std::shared_ptr< const CylinderBounds > newBounds )

Overwrite the existing surface bounds with new ones.

Parameters

newBounds Pointer to the new bounds

◆ assignSurfaceMaterial()

void Acts::CylinderSurface::assignSurfaceMaterial ( std::shared_ptr< const ISurfaceMaterial > material )

overridevirtual

Assign the surface material description.

The material is usually derived in a complicated way and loaded from a framework given source. As various surfaces may share the same source this is provided by a shared pointer

Parameters

material Material description associated to this surface

Reimplemented from Acts::Surface.

◆ bounds()

const CylinderBounds & Acts::CylinderSurface::bounds ( ) const

finalvirtual

This method returns the CylinderBounds by reference.

Returns: Reference to the cylinder bounds

Implements Acts::Surface.

◆ boundsPtr()

const std::shared_ptr< const CylinderBounds > & Acts::CylinderSurface::boundsPtr ( ) const

This method returns the shared_ptr to the CylinderBounds.

Returns: Shared pointer to the cylinder bounds

◆ globalToLocal() [1/2]

Result< Vector2 > Acts::RegularSurface::globalToLocal	(	const GeometryContext &	gctx,
		const Vector3 &	position,
		const Vector3 &	direction,
		double	tolerance = s_onSurfaceTolerance ) const

finalvirtual

Convert a global position to a local one this is the most generic interface, which is implemented by all surfaces.

Note: The position is required to be on-surface, which is indicated by the Result return value.

Parameters

gctx	The current geometry context object, e.g. alignment
position	is the global position to be converted
direction	is the direction of the local position (ignored for `RegularSurface`)
tolerance	is the tolerance for the on-surface check

Returns: Result type containing local position by value

Implements Acts::Surface.

◆ globalToLocal() [2/2]

Result< Vector2 > Acts::CylinderSurface::globalToLocal	(	const GeometryContext &	gctx,
		const Vector3 &	position,
		double	tolerance = s_onSurfaceTolerance ) const

finalvirtual

Global to local transformation.

Parameters

gctx	The current geometry context object, e.g. alignment
position	is the global position to be transformed
tolerance	optional tolerance within which a point is considered valid on surface

Returns: a Result<Vector2> which can be !ok() if the operation fails

Implements Acts::RegularSurface.

◆ intersect()

MultiIntersection3D Acts::CylinderSurface::intersect	(	const GeometryContext &	gctx,
		const Vector3 &	position,
		const Vector3 &	direction,
		const BoundaryTolerance &	boundaryTolerance = BoundaryTolerance::Infinite(),
		double	tolerance = s_onSurfaceTolerance ) const

finalvirtual

Straight line intersection schema from position/direction.

Parameters

gctx	The current geometry context object, e.g. alignment
position	The position to start from
direction	The direction at start
boundaryTolerance	the Boundary Check Tolerance
tolerance	the tolerance used for the intersection

If possible returns both solutions for the cylinder

Returns: SurfaceIntersection object (contains intersection & surface)

Implements Acts::Surface.

◆ localAxes()

std::array< AxisDirection, 2 > Acts::CylinderSurface::localAxes ( ) const

overrideprotectedvirtual

Local axes of the surface.

Returns: An array of local axes directions

Implements Acts::Surface.

◆ localCartesianToBoundLocalDerivative()

Matrix< 2, 3 > Acts::CylinderSurface::localCartesianToBoundLocalDerivative	(	const GeometryContext &	gctx,
		const Vector3 &	position ) const

finalvirtual

Calculate the derivative of bound track parameters local position w.r.t.

position in local 3D Cartesian coordinates

Parameters

gctx	The current geometry context object, e.g. alignment
position	The position of the parameters in global

Returns: Derivative of bound local position w.r.t. position in local 3D cartesian coordinates

Implements Acts::Surface.

◆ localToGlobal() [1/2]

Vector3 Acts::CylinderSurface::localToGlobal	(	const GeometryContext &	gctx,
		const Vector2 &	lposition ) const

finalvirtual

Local to global transformation.

Parameters

gctx	The current geometry context object, e.g. alignment
lposition	is the local position to be transformed

Returns: The global position by value

Implements Acts::RegularSurface.

◆ localToGlobal() [2/2]

Vector3 Acts::RegularSurface::localToGlobal	(	const GeometryContext &	gctx,
		const Vector2 &	lposition,
		const Vector3 &	direction ) const

finalvirtual

Local to global transformation.

This is the most generic interface, which is implemented by all surfaces.

Parameters

gctx	The current geometry context object, e.g. alignment
lposition	local 2D position in specialized surface frame
direction	global 3D momentum direction (ignored for `RegularSurface`)

Returns: The global position by value

Implements Acts::Surface.

◆ mergedWith()

std::pair< std::shared_ptr< CylinderSurface >, bool > Acts::CylinderSurface::mergedWith	(	const CylinderSurface &	other,
		AxisDirection	direction,
		bool	externalRotation,
		const Logger &	logger = getDummyLogger() ) const

Merge two cylinder surfaces into a single one.

Note: The surfaces need to be compatible, i.e. have cylinder bounds that align, and have the same radius

Parameters

other	The other cylinder surface to merge with
direction	The axis direction: either `AxisZ` or `AxisRPhi`
externalRotation	If true, any phi rotation is done in the transform
logger	The logger to use

Returns: The merged cylinder surface and a boolean indicating if surfaces are reversed

Note: The returned boolean is false if this is left or counter-clockwise of other, and true if not.

◆ name()

std::string Acts::CylinderSurface::name ( ) const

overridevirtual

Return method for properly formatted output string.

Returns: String representation of the class name

Implements Acts::Surface.

◆ normal() [1/3]

Vector3 Acts::CylinderSurface::normal	(	const GeometryContext &	gctx,
		const Vector2 &	lposition ) const

finalvirtual

Return method for surface normal information.

Note: for a Cylinder a local position is always required for the normal vector

Parameters

gctx	The current geometry context object, e.g. alignment
lposition	is the local position for which the normal vector is requested

Returns: normal vector at the local position by value

Implements Acts::RegularSurface.

◆ normal() [2/3]

Vector3 Acts::RegularSurface::normal	(	const GeometryContext &	gctx,
		const Vector3 &	pos,
		const Vector3 &	direction ) const

finalvirtual

Calculate the normal vector of the surface This overload is fully generic, fulfills the Surface interface and accepts a global position and a direction.

For RegularSurface this is equivalent to the normal overload, ignoring the direction

Parameters

gctx	The current geometry context object, e.g. alignment
pos	is the global position where the normal vector is constructed
direction	is the direction of the normal vector (ignored for `RegularSurface`)

Returns: Normal vector at the given position

Implements Acts::Surface.

◆ normal() [3/3]

Vector3 Acts::CylinderSurface::normal	(	const GeometryContext &	gctx,
		const Vector3 &	position ) const

finalvirtual

Return method for surface normal information.

Note: for a Cylinder a local position is always required for the normal vector

Parameters

gctx	The current geometry context object, e.g. alignment
position	is the global position for which the normal vector is requested

Returns: normal vector at the global position by value

Implements Acts::RegularSurface.

◆ operator=()

CylinderSurface & Acts::CylinderSurface::operator= ( const CylinderSurface & other )

Assignment operator.

Parameters

other is the source cylinder for the copy

Returns: Reference to this CylinderSurface after assignment

◆ pathCorrection()

double Acts::CylinderSurface::pathCorrection	(	const GeometryContext &	gctx,
		const Vector3 &	position,
		const Vector3 &	direction ) const

finalvirtual

Path correction due to incident of the track.

Parameters

gctx	The current geometry context object, e.g. alignment
position	is the global position as a starting point
direction	is the global momentum direction at the starting point

Returns: is the correction factor due to incident

Implements Acts::Surface.

◆ polyhedronRepresentation()

Polyhedron Acts::CylinderSurface::polyhedronRepresentation	(	const GeometryContext &	gctx,
		unsigned int	quarterSegments = 2u ) const

overridevirtual

Return a Polyhedron for a cylinder.

This method represents the cylinder as a polyhedron with a given number of segments to represent a quarter of a full circle. The polyedron will consist of the vertices of the cylinder on both sides, and faces between them, both as rectangular faces and as triangular faces.

Parameters

gctx	The current geometry context object, e.g. alignment
quarterSegments	The number of segments to approximate a quarter of the full circle; it's chosen to be 1, only the extrema points (-pi, -0.5pi, 0., 0.5pi) are inserted to capture the correct extent in the x-y plane

Returns: A list of vertices and a face/facett description of it

Implements Acts::Surface.

◆ referenceFrame()

RotationMatrix3 Acts::CylinderSurface::referenceFrame	(	const GeometryContext &	gctx,
		const Vector3 &	position,
		const Vector3 &	direction ) const

finalvirtual

Return the measurement frame - this is needed for alignment, in particular The measurement frame of a cylinder is the tangential plane at a given position.

Parameters

gctx	The current geometry context object, e.g. alignment
position	is the position where the measurement frame is defined
direction	is the momentum direction vector (ignored)

Returns: rotation matrix that defines the measurement frame

Reimplemented from Acts::Surface.

◆ referencePosition()

Vector3 Acts::CylinderSurface::referencePosition	(	const GeometryContext &	gctx,
		AxisDirection	aDir ) const

finalvirtual

The binning position method - is overloaded for r-type binning.

Parameters

gctx	The current geometry context object, e.g. alignment
aDir	is the axis Direction of global binning to be done

Returns: is the global position to be used for binning

Implements Acts::GeometryObject.

◆ rotSymmetryAxis()

virtual Vector3 Acts::CylinderSurface::rotSymmetryAxis ( const GeometryContext & gctx ) const

virtual

Return method for the rotational symmetry axis.

Parameters

gctx	The current geometry context object, e.g. alignment

Returns: the z-Axis of transform

◆ transformSurfaceLocalToMaterialLocal()

Vector2 Acts::CylinderSurface::transformSurfaceLocalToMaterialLocal ( const Vector2 & surfaceLocal ) const

overrideprotectedvirtual

Transform surface local coordinates to material local coordinates.

Parameters

surfaceLocal The local coordinates on the surface

Returns: The corresponding local coordinates for material lookup

Reimplemented from Acts::Surface.

◆ type()

SurfaceType Acts::CylinderSurface::type ( ) const

overridevirtual

Return the surface type.

Returns: Surface type identifier

Implements Acts::Surface.

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ CylinderSurface() [1/5]

◆ CylinderSurface() [2/5]

◆ CylinderSurface() [3/5]

◆ CylinderSurface() [4/5]

◆ CylinderSurface() [5/5]

Member Function Documentation

◆ alignmentToPathDerivative()

◆ assignSurfaceBounds()

◆ assignSurfaceMaterial()

◆ bounds()

◆ boundsPtr()

◆ globalToLocal() [1/2]

◆ globalToLocal() [2/2]

◆ intersect()

◆ localAxes()

◆ localCartesianToBoundLocalDerivative()

◆ localToGlobal() [1/2]

◆ localToGlobal() [2/2]

◆ mergedWith()

◆ name()

◆ normal() [1/3]

◆ normal() [2/3]

◆ normal() [3/3]

◆ operator=()

◆ pathCorrection()

◆ polyhedronRepresentation()

◆ referenceFrame()

◆ referencePosition()

◆ rotSymmetryAxis()

◆ transformSurfaceLocalToMaterialLocal()

◆ type()