ActsPlugins::TGeoSurfaceConverter Struct Reference

Helper struct to convert TGeoShapes into Surface or Volume Bounds. More...

#include <ActsPlugins/Root/TGeoSurfaceConverter.hpp>

Static Public Member Functions
static std::tuple< std::shared_ptr< const Acts::CylinderBounds >, const Acts::Transform3, double >	cylinderComponents (const TGeoShape &tgShape, const Double_t *rotation, const Double_t *translation, TGeoAxes axes, double scalor=10.) noexcept(false)
	Convert a TGeoShape into cylinder surface components.
static std::tuple< std::shared_ptr< const Acts::DiscBounds >, const Acts::Transform3, double >	discComponents (const TGeoShape &tgShape, const Double_t *rotation, const Double_t *translation, TGeoAxes axes, double scalor=10.) noexcept(false)
	Convert a TGeoShape into disk surface components.
static std::tuple< std::shared_ptr< const Acts::PlanarBounds >, const Acts::Transform3, double >	planeComponents (const TGeoShape &tgShape, const Double_t *rotation, const Double_t *translation, TGeoAxes axes, double scalor=10.) noexcept(false)
	Convert a TGeoShape into plane surface components.
static double	toRadian (double deg)
	Translate TGeo degree [0, 360) to radian.
static std::tuple< std::shared_ptr< Acts::Surface >, double >	toSurface (const TGeoShape &tgShape, const TGeoMatrix &tgMatrix, TGeoAxes axes, double scalor=10.) noexcept(false)
	Convert a TGeoShape to a Surface.
static Acts::Transform3	transformFromShape (const TGeoShape &tgShape, const TGeoMatrix &tgMatrix, TGeoAxes axes, double scalor=10.) noexcept(false)
	Extract the transform from a TGeoShape by trying cylinder, disc, then plane conversion.

Detailed Description

Helper struct to convert TGeoShapes into Surface or Volume Bounds.

Member Function Documentation

cylinderComponents()

std::tuple< std::shared_ptr< const Acts::CylinderBounds >, const Acts::Transform3, double > ActsPlugins::TGeoSurfaceConverter::cylinderComponents ( const TGeoShape & tgShape, const Double_t * rotation, const Double_t * translation, TGeoAxes axes, double scalor = 10. )

static

Convert a TGeoShape into cylinder surface components.

Parameters

tgShape	The TGeoShape
rotation	The rotation matrix as Double_t* from root
translation	The translation vector as Double_t* from root
axes	The axes definition
scalor	The unit scalor between TGeo and Acts

Returns

tuple of DiscBounds, Transform, thickness

discComponents()

std::tuple< std::shared_ptr< const Acts::DiscBounds >, const Acts::Transform3, double > ActsPlugins::TGeoSurfaceConverter::discComponents ( const TGeoShape & tgShape, const Double_t * rotation, const Double_t * translation, TGeoAxes axes, double scalor = 10. )

static

Convert a TGeoShape into disk surface components.

Parameters

tgShape	The TGeoShape
rotation	The rotation matrix as Double_t* from root
translation	The translation vector as Double_t* from root
axes	The axes definition
scalor	The unit scalor between TGeo and Acts

Returns

tuple of DiscBounds, Transform, thickness

planeComponents()

std::tuple< std::shared_ptr< const Acts::PlanarBounds >, const Acts::Transform3, double > ActsPlugins::TGeoSurfaceConverter::planeComponents ( const TGeoShape & tgShape, const Double_t * rotation, const Double_t * translation, TGeoAxes axes, double scalor = 10. )

static

Convert a TGeoShape into plane surface components.

Parameters

tgShape	The TGeoShape
rotation	The rotation matrix as Double_t* from root
translation	The translation as a Double_t*
axes	The axes definition
scalor	The unit scalor between TGeo and Acts

Returns

tuple of PlanarBounds, Transform, thickness

toRadian()

double ActsPlugins::TGeoSurfaceConverter::toRadian ( double deg )

static

Translate TGeo degree [0, 360) to radian.

• will correct to [-pi,pi)
• it will return any multiple of 360.0 to 2pi

  Parameters

  deg	The input in degree

  Returns

  angle in radians

toSurface()

std::tuple< std::shared_ptr< Acts::Surface >, double > ActsPlugins::TGeoSurfaceConverter::toSurface ( const TGeoShape & tgShape, const TGeoMatrix & tgMatrix, TGeoAxes axes, double scalor = 10. )

static

Convert a TGeoShape to a Surface.

Parameters

tgShape	The TGeoShape
tgMatrix	The matrix representing the transform
axes	The axes definition
scalor	The unit scalor between TGeo and Acts

Returns

shared pointer to a surface and the original thickness that has been condensed to the surface

transformFromShape()

Acts::Transform3 ActsPlugins::TGeoSurfaceConverter::transformFromShape ( const TGeoShape & tgShape, const TGeoMatrix & tgMatrix, TGeoAxes axes, double scalor = 10. )

static

Extract the transform from a TGeoShape by trying cylinder, disc, then plane conversion.

Parameters

tgShape	The TGeoShape
tgMatrix	The matrix representing the transform
axes	The axes definition
scalor	The unit scalor between TGeo and Acts

Returns

The Acts transform

Exceptions

std::runtime_error

if the shape cannot be converted