ActsPlugins::TGeoDetectorElement Class Reference

DetectorElement plugin for ROOT TGeo shapes. More...

#include <ActsPlugins/Root/TGeoDetectorElement.hpp>

Inheritance diagram for ActsPlugins::TGeoDetectorElement:

Collaboration diagram for ActsPlugins::TGeoDetectorElement:

Public Types
using	ContextType = Acts::GeometryContext
	Broadcast the context type.
using	Identifier = identifier_type
using	identifier_diff = long long
using	identifier_type = unsigned long long

Public Member Functions
	TGeoDetectorElement (const Identifier &identifier, const TGeoNode &tGeoNode, const Acts::Transform3 &tgTransform, const std::shared_ptr< const Acts::DiscBounds > &tgBounds, double tgThickness=0.)
	Constructor with pre-computed disk surface.
	TGeoDetectorElement (const Identifier &identifier, const TGeoNode &tGeoNode, const Acts::Transform3 &tgTransform, const std::shared_ptr< const Acts::PlanarBounds > &tgBounds, double tgThickness=0.)
	Constructor with pre-computed surface.
	TGeoDetectorElement (const Identifier &identifier, const TGeoNode &tGeoNode, const TGeoMatrix &tGeoMatrix=TGeoIdentity(), const std::string &axes="XYZ", double scalor=10., std::shared_ptr< const Acts::ISurfaceMaterial > material=nullptr)
	Constructor.
	~TGeoDetectorElement () override
Identifier	identifier () const
	Get the detector element identifier.
bool	isSensitive () const final
	Is the detector element a sensitive element.
const Acts::Transform3 &	localToGlobalTransform (const Acts::GeometryContext &gctx) const override
	Return local to global transform associated with this identifier.
const Acts::Transform3 &	nominalTransform () const
	Return the nominal - non-contextual transform.
const Acts::Surface &	surface () const override
	Return surface associated with this detector element.
Acts::Surface &	surface () override
	Return surface associated with this detector element.
const TGeoNode &	tgeoNode () const
	Return the TGeoNode for back navigation.
double	thickness () const
	Returns the thickness of the module.
Public Member Functions inherited from Acts::SurfacePlacementBase
virtual	~SurfacePlacementBase ()=default
	Virtual default constructor.

Detailed Description

DetectorElement plugin for ROOT TGeo shapes.

Added possibility to hand over transformation matrix.

Todo

what if shape conversion fails? add implementation of more than one surface per module, implementing also for other shapes->Cone,ConeSeg,Tube? what if not used with DD4hep?

Member Typedef Documentation

ContextType

using ActsPlugins::TGeoDetectorElement::ContextType = Acts::GeometryContext

Broadcast the context type.

Identifier

using ActsPlugins::TGeoDetectorElement::Identifier = identifier_type

identifier_diff

using ActsPlugins::TGeoDetectorElement::identifier_diff = long long

identifier_type

using ActsPlugins::TGeoDetectorElement::identifier_type = unsigned long long

Constructor & Destructor Documentation

TGeoDetectorElement() [1/3]

ActsPlugins::TGeoDetectorElement::TGeoDetectorElement	(	const Identifier &	identifier,
		const TGeoNode &	tGeoNode,
		const TGeoMatrix &	tGeoMatrix = TGeoIdentity(),
		const std::string &	axes = "XYZ",
		double	scalor = 10.,
		std::shared_ptr< const Acts::ISurfaceMaterial >	material = nullptr )

Constructor.

Note

this constructor used auto-translation

Parameters

identifier	is the detector identifier
tGeoNode	is the TGeoNode which should be represented
tGeoMatrix	The Matrix to global (i.e. ACTS transform)
axes	is the axis orientation with respect to the tracking frame it is a string of the three characters x, y and z (standing for the three axes) there is a distinction between capital and lower case characters : capital -> positive orientation of the axis lower case -> negative orientation of the axis example options are "XYZ" -> identical frame definition (default value) "YZX" -> node y axis is tracking x axis, etc. "XzY" -> negative node z axis is tracking y axis, etc.

Note

This parameter only needs to be set for plane modules

Parameters

scalor

is the scale factor for unit conversion if needed

Note

In the translation from a 3D geometry (TGeo) which only knows tubes to a 2D geometry (Tracking geometry) a distinction if the module should be described as a cylinder or a disc surface needs to be done. Since this information can not be taken just from the geometry description (both can be described as TGeoTubeSeg), one needs to set the flag 'isDisc' in case a volume with shape TGeoTubeSeg should be translated to a disc surface. Per default it will be translated into a cylindrical surface.

Parameters

material

Possible material of detector element

TGeoDetectorElement() [2/3]

ActsPlugins::TGeoDetectorElement::TGeoDetectorElement	(	const Identifier &	identifier,
		const TGeoNode &	tGeoNode,
		const Acts::Transform3 &	tgTransform,
		const std::shared_ptr< const Acts::PlanarBounds > &	tgBounds,
		double	tgThickness = 0. )

Constructor with pre-computed surface.

Note

this detector element constructor needs everything pre-computed.

Parameters

identifier	is the detector identifier
tGeoNode	is the TGeoNode which should be represented
tgTransform	the transform of this detector element
tgBounds	the bounds of this surface
tgThickness	the thickness of this detector element

TGeoDetectorElement() [3/3]

ActsPlugins::TGeoDetectorElement::TGeoDetectorElement	(	const Identifier &	identifier,
		const TGeoNode &	tGeoNode,
		const Acts::Transform3 &	tgTransform,
		const std::shared_ptr< const Acts::DiscBounds > &	tgBounds,
		double	tgThickness = 0. )

Constructor with pre-computed disk surface.

Note

this detector element constructor needs everything pre-computed.

Parameters

identifier	is the detector identifier
tGeoNode	is the TGeoNode which should be represented
tgTransform	the transform of this detector element
tgBounds	the bounds of this surface
tgThickness	the thickness of this detector element

~TGeoDetectorElement()

ActsPlugins::TGeoDetectorElement::~TGeoDetectorElement ( )

override

Member Function Documentation

isSensitive()

bool ActsPlugins::TGeoDetectorElement::isSensitive ( ) const

finalvirtual

Is the detector element a sensitive element.

Implements Acts::SurfacePlacementBase.

nominalTransform()

const Acts::Transform3 & ActsPlugins::TGeoDetectorElement::nominalTransform

(

)

const

Return the nominal - non-contextual transform.

Returns

Reference to the transformation matrix from local to global coordinates

tgeoNode()

const TGeoNode & ActsPlugins::TGeoDetectorElement::tgeoNode

(

)

const

Return the TGeoNode for back navigation.

Returns

Reference to the underlying TGeoNode