GeoCache Class Reference

Class to faciliate easy access to sensor information of the VXD like coordinate transformations or pitch size. More...

#include <GeoCache.h>

Collaboration diagram for GeoCache:

Public Member Functions
	~GeoCache ()
	destructor to clean up structures
void	clear ()
	Clean up internal structures.
void	findVolumes (G4VPhysicalVolume *envelope)
	Search a given Geometry for Sensors. More...
void	addSensor (SensorInfoBase *sensorinfo)
	Add a SensorInfo instance to the list of known sensors This method will manually add a SensorInfo instance to the list of known sensors. More...
const std::set< Belle2::VxdID >	getLayers (SensorInfoBase::SensorType sensortype=SensorInfoBase::VXD)
	Return a set of all known Layers. More...
const std::set< Belle2::VxdID > &	getLadders (Belle2::VxdID layer) const
	Return a set of all ladder IDs belonging to a given layer.
const std::set< Belle2::VxdID > &	getSensors (Belle2::VxdID ladder) const
	Return a set of all sensor IDs belonging to a given ladder.
bool	validSensorID (Belle2::VxdID id) const
	Check that id is a valid sensor number. More...
const std::vector< VxdID >	getListOfSensors () const
	Get list of all sensors. More...
const SensorInfoBase &	getSensorInfo (Belle2::VxdID id) const
	Return a referecne to the SensorInfo of a given SensorID.
const std::map< VxdID, TGeoHMatrix > &	getHalfShellPlacements () const
	Retrieve stored half-shell placements into world volume. More...
const std::vector< std::pair< VxdID, TGeoHMatrix > > &	getLadderPlacements (VxdID halfShell) const
	Retrieve stored ladder placements into half-shell. More...
const std::vector< std::pair< VxdID, TGeoHMatrix > > &	getSensorPlacements (VxdID ladder) const
	Retrieve stored sensor placements into ladders. More...
void	addHalfShellPlacement (VxdID halfShell, const G4Transform3D &placement)
	Remember how half-shell is placed into world volume.
void	addLadderPlacement (VxdID halfShell, VxdID ladder, const G4Transform3D &placement)
	Remember how ladder is placed into half-shell.
void	addSensorPlacement (VxdID ladder, VxdID sensor, const G4Transform3D &placement)
	Remember how sensor is placed into ladder.
void	setupReconstructionTransformations ()
	Initialize from DB for reconstruction Updates all SensorInfo transformations for reconstruction from DB object(s) (recalculating new global positions) and registers itself for subsequent updates of DB objects to keep the hierarchy up-to-date. More...
const GeoTools *	getGeoTools ()
	Return a raw pointer to a GeoTools object. More...

Static Public Member Functions
static TGeoHMatrix	g4Transform3DToTGeo (const G4Transform3D &g4)
	Covenient function to convert G4Transform3D to TGeoHMatrix.
static TGeoHMatrix	getTGeoFromRigidBodyParams (double dU, double dV, double dW, double dAlpha, double dBeta, double dGamma)
	Convert 6 rigid body params (alignment corrections) to corresponding TGeoHMatrix Angles in radians, length units in centimeters.
static const SensorInfoBase &	get (Belle2::VxdID id)
	Return a reference to the SensorInfo of a given SensorID. More...
static GeoCache &	getInstance ()
	Return a reference to the singleton instance.

Private Types
typedef std::unordered_map< VxdID::baseType, SensorInfoBase * >	SensorInfoMap
	Hash map to store pointers to all existing SensorInfos with constant lookup complexity.
typedef std::map< Belle2::VxdID, std::set< Belle2::VxdID > >	SensorHierachy
	Map to store a set of unique VxdIDs belonging to one VxdID. More...

Private Member Functions
	GeoCache ()
	Singleton class, hidden constructor.
	GeoCache (const GeoCache &)=delete
	Singleton class, hidden copy constructor.
GeoCache &	operator= (const GeoCache &)=delete
	Singleton class, hidden assignment operator.

Private Attributes
std::set< Belle2::VxdID >	m_pxdLayers
	Set of all PXD layer IDs.
std::set< Belle2::VxdID >	m_svdLayers
	Set of all SVD layer IDs.
std::set< Belle2::VxdID >	m_telLayers
	Set of all Tel layer IDs.
SensorHierachy	m_ladders
	Map of all Ladder IDs belonging to a given Layer ID.
SensorHierachy	m_sensors
	Map of all Sensor IDs belonging to a given Ladder ID.
std::map< VxdID, TGeoHMatrix >	m_halfShellPlacements {}
	Map of shell ids and their placements in top volume.
std::map< VxdID, std::vector< std::pair< VxdID, TGeoHMatrix > > >	m_ladderPlacements {}
	Map of shell ids and their associated ladder ids and their placements.
std::map< VxdID, std::vector< std::pair< VxdID, TGeoHMatrix > > >	m_sensorPlacements {}
	Map of ladder ids and their associated sensor ids and their placements.
SensorInfoMap	m_sensorInfo
	Map to find the SensorInfo for a given Sensor ID.
std::unique_ptr< GeoTools >	m_geoToolsPtr
	Pointer to a GeoTools object.
DBObjPtr< VXDAlignment >	m_vxdAlignments
	DBObjPtr for the alignment.

Detailed Description

Class to faciliate easy access to sensor information of the VXD like coordinate transformations or pitch size.

Definition at line 39 of file GeoCache.h.

Member Typedef Documentation

SensorHierachy

typedef std::map<Belle2::VxdID, std::set<Belle2::VxdID> > SensorHierachy

private

Map to store a set of unique VxdIDs belonging to one VxdID.

Like ladders belong to layers, etc.

Definition at line 158 of file GeoCache.h.

Member Function Documentation

addSensor()

void addSensor

(

SensorInfoBase *

sensorinfo

)

Add a SensorInfo instance to the list of known sensors This method will manually add a SensorInfo instance to the list of known sensors.

It should not be needed except for testing purposes.

Parameters

sensorinfo

SensorInfoBase instance to add to the list of known sensors.

Definition at line 147 of file GeoCache.cc.

    {
      //Save pointer to the SensorInfo and update lists of all existing
      //layers,ladders,sensors
      VxdID sensorID = sensorinfo->getID();
      VxdID ladderID = sensorID;
      ladderID.setSensorNumber(0);
      VxdID layerID  = ladderID;
      layerID.setLadderNumber(0);
 
      m_sensorInfo[sensorID] = sensorinfo;
 
      switch (sensorinfo->getType()) {
        case SensorInfoBase::PXD:
          m_pxdLayers.insert(layerID);
          break;
        case SensorInfoBase::SVD:
          m_svdLayers.insert(layerID);
          break;
        case SensorInfoBase::TEL:
          m_telLayers.insert(layerID);
          break;
        default:
          B2FATAL("Cannot use anything else as SensorTypes PXD, SVD, or TEL when creating VXD Sensors");
      }
      m_ladders[layerID].insert(ladderID);
      m_sensors[ladderID].insert(sensorID);
    }

findVolumes()

void findVolumes

(

G4VPhysicalVolume *

envelope

)

Search a given Geometry for Sensors.

This method will search a given Physical Volume and add all sensitive Volumes where the SensitiveDetector implementation inherits from vxd::SensitiveDetector to the cache.

The given volume must be a volume placed directly in the top volume, otherwise the transformations cannot be determined correctly.

This method should be called by the geometry creator once all sensitive volumes are placed

Parameters

envelope

Geometry tree to search, usually the Envelope of PXD or SVD

Definition at line 78 of file GeoCache.cc.

get()

static const SensorInfoBase& get ( Belle2::VxdID  id )

inlinestatic

Return a reference to the SensorInfo of a given SensorID.

This function is a shorthand for GeoCache::getInstance().getSensorInfo

Definition at line 139 of file GeoCache.h.

{ return getInstance().getSensorInfo(id); }

getGeoTools()

const GeoTools* getGeoTools ( )

inline

Return a raw pointer to a GeoTools object.

Returns

const GeoTools* : raw pointer, no onwership transfer

Definition at line 147 of file GeoCache.h.

getHalfShellPlacements()

const map< VxdID, TGeoHMatrix > & getHalfShellPlacements

(

)

const

Retrieve stored half-shell placements into world volume.

Returns

map of VxdID for half-shell and its placement

Definition at line 239 of file GeoCache.cc.

getLadderPlacements()

const vector< pair< VxdID, TGeoHMatrix > > & getLadderPlacements

(

VxdID

halfShell

)

const

Retrieve stored ladder placements into half-shell.

Returns

vector of pairs, each pair contains a VxdID for ladder (layer.ladder.0) and its placement

Definition at line 250 of file GeoCache.cc.

getLayers()

const set< VxdID > getLayers

(

SensorInfoBase::SensorType

sensortype = SensorInfoBase::VXD

)

Return a set of all known Layers.

Parameters

sensortype

Wether to only return the layer IDs for PXD, SVD or all VXD layers (default)

Returns

a set containing all existing Layers with the requested type

Definition at line 176 of file GeoCache.cc.

getListOfSensors()

const vector< VxdID > getListOfSensors

(

)

const

Get list of all sensors.

Intended mostly for Python, where std::sets don't work.

Returns

vector of VxdIDs of all sensors in GeoCache.

Definition at line 59 of file GeoCache.cc.

getSensorPlacements()

const vector< pair< VxdID, TGeoHMatrix > > & getSensorPlacements

(

VxdID

ladder

)

const

Retrieve stored sensor placements into ladders.

Returns

vector of pairs, each pair contains a VxdID for sensor and its placement

Definition at line 241 of file GeoCache.cc.

setupReconstructionTransformations()

void setupReconstructionTransformations

(

)

Initialize from DB for reconstruction Updates all SensorInfo transformations for reconstruction from DB object(s) (recalculating new global positions) and registers itself for subsequent updates of DB objects to keep the hierarchy up-to-date.

So the hierarchy is as follows: Belle 2 / | | \ Ying Yang Pat Mat ... other sub-detectors / | / | | \ | \ ...... ladders ...... / / | / | | \ | \ \ ......... sensors ........

Definition at line 259 of file GeoCache.cc.

validSensorID()

bool validSensorID

(

Belle2::VxdID

id

)

const

Check that id is a valid sensor number.

Parameters

id	sensor id to be checked against current GeoCache information

Returns

true if there is a SensorInfo associated with id, otherwise false.

Definition at line 52 of file GeoCache.cc.

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The documentation for this class was generated from the following files:

• vxd/geometry/include/GeoCache.h
• vxd/geometry/src/GeoCache.cc