DTTopology Class Reference

#include <DTTopology.h>

Inheritance diagram for DTTopology:

Public Types
enum	Side {   zMin, zMax, xMin, xMax,   yMin, yMax, none }
	Sides of the cell. More...
Public Types inherited from Topology
typedef Point2DBase< double, LocalTag >	Local2DPoint
typedef Vector2D::MathVector	MathVector2D
typedef Basic2DVector< double >	Vector2D

Public Member Functions
float	cellHeight () const
	Returns the cell height. More...
float	cellLenght () const
float	cellWidth () const
	Returns the cell width. More...
int	channel (const LocalPoint &p) const override
int	channels () const
	Returns the number of wires in the layer. More...
	DTTopology (int firstWire, int nChannels, float semilenght)
	Constructor: number of first wire, total # of wires in the layer and their lenght. More...
int	firstChannel () const
	Returns the wire number of the first wire. More...
bool	isWireValid (const int wireNumber) const
int	lastChannel () const
	Returns the wire number of the last wire. More...
LocalError	localError (const MeasurementPoint &, const MeasurementError &) const override
LocalPoint	localPosition (const MeasurementPoint &) const override
MeasurementError	measurementError (const LocalPoint &, const LocalError &) const override
	Conversion to the measurement frame. More...
MeasurementPoint	measurementPosition (const LocalPoint &) const override
Side	onWhichBorder (float x, float y, float z) const
Side	onWhichBorder_old (float x, float y, float z) const
	Returns the side of the cell in which resides the point (x,y,z) (old cell geometry). More...
float	sensibleHeight () const
	Returns the height of the actual sensible volume of the cell. More...
float	sensibleWidth () const
	Returns the width of the actual sensible volume of the cell. More...
float	wirePosition (int wireNumber) const
	Returns the x position in the layer of a given wire number. More...
	~DTTopology () override
Public Member Functions inherited from Topology
virtual int	channel (const LocalPoint &lp, const LocalTrackAngles &) const
	conversion taking also the angle from the track state More...
virtual LocalError	localError (const MeasurementPoint &mp, const MeasurementError &me, const LocalTrackPred &) const
	conversion taking also the angle from the predicted track state More...
virtual LocalPoint	localPosition (const MeasurementPoint &mp, const LocalTrackPred &) const
	conversion taking also the angle from the predicted track state More...
virtual MeasurementError	measurementError (const LocalPoint &lp, const LocalError &le, const LocalTrackAngles &) const
	conversion taking also the angle from the track state More...
virtual MeasurementPoint	measurementPosition (const LocalPoint &lp, const LocalTrackAngles &) const
	conversion taking also the angle from the track state More...
virtual	~Topology ()

Private Attributes
int	theFirstChannel
float	theLength
int	theNChannels
Local2DPoint	theOffSet

Static Private Attributes
static const float	IBeamThickness = 0.13
static const float	IBeamWingLength = 0.635
static const float	IBeamWingThickness = 0.13
static const float	plateThickness = 0.15
static const float	theHeight = 1.3
static const float	theWidth = 4.2

Detailed Description

Conversion between the local frame of the DT DetUnits (i.e. a layer of cells in a superlayer) and the "measurement frame". This is a rectangular frame where x runs between (FirstCellNumber-0.5) and (LastCellNumber+0.5). Note that cell numbers follow the hardware convention, so that FirstCellNumber is either 1 or 2 depending of the layer.

Note that DTs measure a time, not a position, so unlike for strip detectors, there is no guarantee that a measurement in a cell will not end up in the neighbouring cell. This must be taken into account for all cases where a * LocalPoint is used as an argument, e.g. to get back the channel number. This will be an issue if wire misalignment is introduced.

The Topology interface is extended with methods relevant for the DT detectors, e.g. wirePosition(int), etc.

Author

R. Bellan - INFN Torino

Definition at line 28 of file DTTopology.h.

Member Enumeration Documentation

Side

enum DTTopology::Side

Sides of the cell.

Enumerator
zMin
zMax
xMin
xMax
yMin
yMax
none

Definition at line 89 of file DTTopology.h.

{ zMin, zMax, xMin, xMax, yMin, yMax, none };

Constructor & Destructor Documentation

DTTopology()

DTTopology::DTTopology	(	int	firstWire,
		int	nChannels,
		float	semilenght
	)

Constructor: number of first wire, total # of wires in the layer and their lenght.

Definition at line 22 of file DTTopology.cc.

    : theFirstChannel(firstWire), theNChannels(nChannels), theLength(semilenght * 2) {
  theOffSet = Local2DPoint(-theNChannels / 2. * theWidth, -theLength / 2.);
 
#ifdef VERBOSE
  cout << "Constructing DTTopology with:" << endl
       << "number of wires = " << theNChannels << ", first wire number = " << theFirstChannel << endl
       << ", width = " << theWidth << ", height = " << theHeight << ", length = " << theLength << endl;
#endif
}

References gather_cfg::cout, theFirstChannel, theHeight, theLength, theNChannels, theOffSet, and theWidth.

~DTTopology()

DTTopology::~DTTopology ( )

inlineoverride

Definition at line 33 of file DTTopology.h.

{}

Member Function Documentation

cellHeight()

float DTTopology::cellHeight ( ) const

inline

Returns the cell height.

Definition at line 71 of file DTTopology.h.

{ return theHeight; }

References theHeight.

Referenced by FWRecoGeometryESProducer::addDTGeometry(), DTGeometryTest::analyze(), DTDigitizer::dumpHit(), HoughGrouping::obtainGeometricalBorders(), and HoughGrouping::run().

cellLenght()

float DTTopology::cellLenght ( ) const

inline

Returns the cell length. This is the length of the sensitive volume, i.e. lenght of the wire minus the lenght of the two tappini (1.55 mm each)

Definition at line 74 of file DTTopology.h.

{ return theLength; }

References theLength.

Referenced by FWRecoGeometryESProducer::addDTGeometry(), DTGeometryTest::analyze(), DTDigitizer::dumpHit(), DTDigitizer::externalDelays(), DTTTrigSyncTOFCorr::offset(), DTTTrigSyncFromDB::offset(), and DTRecHitQuality::simHitDistFromFE().

cellWidth()

float DTTopology::cellWidth ( ) const

inline

Returns the cell width.

Definition at line 69 of file DTTopology.h.

{ return theWidth; }

References theWidth.

Referenced by FWRecoGeometryESProducer::addDTGeometry(), DTGeometryTest::analyze(), DTDigitizer::dumpHit(), HoughGrouping::obtainGeometricalBorders(), DTTrigGeomUtils::phiRange(), HoughGrouping::run(), and DTTrigGeomUtils::thetaRange().

channel()

int DTTopology::channel ( const LocalPoint &  p ) const

overridevirtual

Return the wire number, starting from a LocalPoint. This method is deprecated: when converting the position of a rechit, there is no guarantee that the converted value can be interpreted as the cell where the hit belongs, see note on neighbouring cells in the class header.

Implements Topology.

Definition at line 54 of file DTTopology.cc.

                                                  {
  return static_cast<int>((lp.x() - theOffSet.x()) / theWidth + theFirstChannel);
}

References theFirstChannel, theOffSet, theWidth, PV2DBase< T, PVType, FrameType >::x(), and PV3DBase< T, PVType, FrameType >::x().

Referenced by HoughGrouping::associateHits(), and MuonSimHitProducer::produce().

channels()

int DTTopology::channels ( ) const

inline

Returns the number of wires in the layer.

Definition at line 76 of file DTTopology.h.

{ return theNChannels; }

References theNChannels.

Referenced by FWRecoGeometryESProducer::addDTGeometry(), DTGeometryTest::analyze(), DTTPAnalyzer::endJob(), DTTrigGeom::getGeom(), DTTrigGeomUtils::phiRange(), and DTTrigGeomUtils::thetaRange().

firstChannel()

int DTTopology::firstChannel ( ) const

inline

Returns the wire number of the first wire.

Definition at line 79 of file DTTopology.h.

{ return theFirstChannel; }

References theFirstChannel.

Referenced by FWRecoGeometryESProducer::addDTGeometry(), DTGeometryTest::analyze(), DTTPDeadWriter::analyze(), DTNoiseCalibration::analyze(), DTEfficiencyTask::analyze(), HoughGrouping::associateHits(), DTt0DBValidation::beginRun(), dtCalibration::DTT0WireInChamberReferenceCorrection::correction(), DTTPAnalyzer::endJob(), DTT0Correction::endJob(), DTNoiseCalibration::endJob(), HoughGrouping::obtainGeometricalBorders(), DTLocalTriggerBaseTest::phiRange(), MuonSimHitProducer::produce(), HoughGrouping::run(), and ValidateGeometry::validateDTLayerGeometry().

isWireValid()

bool DTTopology::isWireValid ( const int  wireNumber ) const

inline

Definition at line 64 of file DTTopology.h.

                                               {
    return (wireNumber - (theFirstChannel - 1) <= 0 || wireNumber - lastChannel() > 0) ? false : true;
  }

References funct::false, lastChannel(), and theFirstChannel.

Referenced by DTLinearDriftAlgo::compute(), DTLinearDriftFromDBAlgo::compute(), DTNoDriftAlgo::compute(), DTParametrizedDriftAlgo::compute(), and wirePosition().

lastChannel()

int DTTopology::lastChannel ( ) const

inline

Returns the wire number of the last wire.

Definition at line 81 of file DTTopology.h.

{ return theNChannels + theFirstChannel - 1; }

References theFirstChannel, and theNChannels.

Referenced by FWRecoGeometryESProducer::addDTGeometry(), DTGeometryTest::analyze(), DTNoiseCalibration::analyze(), DTEfficiencyTask::analyze(), DTnoiseDBValidation::beginRun(), DTt0DBValidation::beginRun(), DTT0Correction::endJob(), DTNoiseCalibration::endJob(), isWireValid(), HoughGrouping::obtainGeometricalBorders(), DTLocalTriggerBaseTest::phiRange(), MuonSimHitProducer::produce(), HoughGrouping::run(), ValidateGeometry::validateDTLayerGeometry(), and wirePosition().

localError()

LocalError DTTopology::localError ( const MeasurementPoint &  , const MeasurementError &  me  ) const

overridevirtual

Conversion between measurement coordinates and local cartesian coordinates.

Implements Topology.

Definition at line 41 of file DTTopology.cc.

                                                                                             {
  return LocalError(me.uu() * (theWidth * theWidth), 0, me.vv() * (theLength * theLength));
}

References hlt_dqm_clientPB-live_cfg::me, theLength, and theWidth.

localPosition()

LocalPoint DTTopology::localPosition ( const MeasurementPoint &  mp ) const

overridevirtual

Conversion between measurement coordinates and local cartesian coordinates.

Implements Topology.

Definition at line 37 of file DTTopology.cc.

                                                                     {
  return LocalPoint((mp.x() - theFirstChannel) * theWidth + theOffSet.x(), (1 - mp.y()) * theLength + theOffSet.y());
}

References theFirstChannel, theLength, theOffSet, theWidth, PV2DBase< T, PVType, FrameType >::x(), and PV2DBase< T, PVType, FrameType >::y().

measurementError()

MeasurementError DTTopology::measurementError ( const LocalPoint &  , const LocalError &  le  ) const

overridevirtual

Conversion to the measurement frame.

Implements Topology.

Definition at line 50 of file DTTopology.cc.

                                                                                             {
  return MeasurementError(le.xx() / (theWidth * theWidth), 0, le.yy() / (theLength * theLength));
}

References theLength, theWidth, LocalError::xx(), and LocalError::yy().

measurementPosition()

MeasurementPoint DTTopology::measurementPosition ( const LocalPoint &  lp ) const

overridevirtual

Conversion to the measurement frame. (Caveat: when converting the position of a rechit, there is no guarantee that the converted value can be interpreted as the cell where the hit belongs, see note on neighbouring cells in the class header.

Implements Topology.

Definition at line 45 of file DTTopology.cc.

                                                                           {
  return MeasurementPoint(static_cast<int>((lp.x() - theOffSet.x()) / theWidth + theFirstChannel),
                          1 - (lp.y() - theOffSet.y()) / theLength);
}

References theFirstChannel, theLength, theOffSet, theWidth, PV2DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::x(), PV2DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::y().

onWhichBorder()

DTTopology::Side DTTopology::onWhichBorder	(	float	x,
		float	y,
		float	z
	)		const

Returns the side of the cell in which resides the point (x,y,z) (new cell geometry, i.e. with I-beam profiles).

Definition at line 78 of file DTTopology.cc.

                                                                        {
  // epsilon = Tolerance to determine if a hit starts/ends on the cell border.
  // Current value comes from CMSIM, where hit position is
  // always ~10um far from surface. For OSCAR the discrepancy is < 1um.
  const float epsilon = 0.0015;  // 15 um
 
  // with new geometry the cell shape is not rectangular, but is a
  // rectangular with the I-beam "Wing" subtracted.
  // The height of the Wing is 1.0 mm and the length is 6.35 mm: these 4
  // volumens must be taken into account when the border is computed
 
  Side side = none;
 
  if (fabs(z) > (sensibleHeight() / 2. - epsilon) ||
      (fabs(x) > (sensibleWidth() / 2. - IBeamWingLength - epsilon) &&
       fabs(z) > (sensibleHeight() / 2. - IBeamWingThickness - epsilon))) {  //FIXME
 
    if (z > 0.)
      side = zMax;  // This is currently the INNER surface.
    else
      side = zMin;
  }
 
  else if (fabs(x) > (sensibleWidth() / 2. - epsilon)) {
    if (x > 0.)
      side = xMax;
    else
      side = xMin;
  }  // FIXME: else if ymax, ymin...
 
  return side;
}

References geometryDiff::epsilon, IBeamWingLength, IBeamWingThickness, none, sensibleHeight(), sensibleWidth(), x, xMax, xMin, z, zMax, and zMin.

Referenced by DTDigitizer::computeTime(), DTDigitizer::dumpHit(), and DTHitAssociator::SimHitOK().

onWhichBorder_old()

DTTopology::Side DTTopology::onWhichBorder_old	(	float	x,
		float	y,
		float	z
	)		const

Returns the side of the cell in which resides the point (x,y,z) (old cell geometry).

Definition at line 112 of file DTTopology.cc.

                                                                            {
  // epsilon = Tolerance to determine if a hit starts/ends on the cell border.
  // Current value comes from CMSIM, where hit position is
  // always ~10um far from surface. For OSCAR the discrepancy is < 1um.
  const float epsilon = 0.0015;  // 15 um
 
  Side side = none;
 
  if (fabs(z) > (sensibleHeight() / 2. - epsilon)) {
    if (z > 0.) {
      side = zMax;  // This is currently the INNER surface.
    } else {
      side = zMin;
    }
  } else if (fabs(x) > (sensibleWidth() / 2. - epsilon)) {
    if (x > 0.) {
      side = xMax;
    } else {
      side = xMin;
    }
  }  // FIXME: else if ymax, ymin...
 
  return side;
}

References geometryDiff::epsilon, none, sensibleHeight(), sensibleWidth(), x, xMax, xMin, z, zMax, and zMin.

sensibleHeight()

float DTTopology::sensibleHeight

(

)

const

Returns the height of the actual sensible volume of the cell.

Definition at line 35 of file DTTopology.cc.

{ return theHeight - plateThickness; }

References plateThickness, and theHeight.

Referenced by onWhichBorder(), and onWhichBorder_old().

sensibleWidth()

float DTTopology::sensibleWidth

(

)

const

Returns the width of the actual sensible volume of the cell.

Definition at line 33 of file DTTopology.cc.

{ return theWidth - IBeamThickness; }

References IBeamThickness, and theWidth.

Referenced by onWhichBorder(), and onWhichBorder_old().

wirePosition()

float DTTopology::wirePosition

(

int

wireNumber

)

const

Returns the x position in the layer of a given wire number.

Definition at line 59 of file DTTopology.cc.

                                                   {
  if (!isWireValid(wireNumber))  //- (theFirstChannel-1) <= 0. || wireNumber > lastChannel() )
    throw cms::Exception("InvalidWireNumber")
        << "DTTopology::wirePosition:"
        << " Requested wire number: " << wireNumber << " ,but the first wire number is " << theFirstChannel
        << " and the last wire number is " << lastChannel() << std::endl;
  else
    return (wireNumber - (theFirstChannel - 1) - 0.5) * theWidth + theOffSet.x();
}

References Exception, isWireValid(), lastChannel(), theFirstChannel, theOffSet, theWidth, and PV2DBase< T, PVType, FrameType >::x().

Referenced by DTResolutionAnalysisTask::analyze(), HoughGrouping::associateHits(), DTSegmentUpdator::calculateT0corr(), DTRecHitSegmentResidual::compute(), DTLinearDriftAlgo::compute(), DTLinearDriftFromDBAlgo::compute(), DTNoDriftAlgo::compute(), DTParametrizedDriftAlgo::compute(), DTCalibValidationFromMuons::compute(), DTCalibValidation::compute(), DTDigitizer::computeTime(), DTDigiSyncTOFCorr::digitizerOffset(), MuonShowerDigiFiller::fill(), DTSegmentUpdator::fit(), DTTMax::InfoLayer::InfoLayer(), DTClusterer::initHits(), DTTrigGeom::localPosition(), HoughGrouping::obtainGeometricalBorders(), DTTTrigSyncFromDB::offset(), DTTTrigSyncTOFCorr::offset(), DTLocalTriggerBaseTest::phiRange(), DTCalibValidationFromMuons::recHitDistFromWire(), DTCalibValidation::recHitDistFromWire(), DTRecHitQuality::recHitDistFromWire(), GlobalRecHitsAnalyzer::recHitDistFromWire(), GlobalRecHitsProducer::recHitDistFromWire(), HoughGrouping::run(), DTResidualCalibration::segmentToWireDistance(), DTRecHitQuality::simHitDistFromWire(), GlobalRecHitsAnalyzer::simHitDistFromWire(), GlobalRecHitsProducer::simHitDistFromWire(), DTHitAssociator::SimHitOK(), DTTrigGeom::tubePosInCh(), DTSegmentUpdator::updateHits(), and ValidateGeometry::validateDTLayerGeometry().

Member Data Documentation

IBeamThickness

const float DTTopology::IBeamThickness = 0.13

staticprivate

Definition at line 108 of file DTTopology.h.

Referenced by sensibleWidth().

IBeamWingLength

const float DTTopology::IBeamWingLength = 0.635

staticprivate

Definition at line 106 of file DTTopology.h.

Referenced by onWhichBorder().

IBeamWingThickness

const float DTTopology::IBeamWingThickness = 0.13

staticprivate

Definition at line 105 of file DTTopology.h.

Referenced by onWhichBorder().

plateThickness

const float DTTopology::plateThickness = 0.15

staticprivate

Definition at line 107 of file DTTopology.h.

Referenced by sensibleHeight().

theFirstChannel

int DTTopology::theFirstChannel

private

Definition at line 98 of file DTTopology.h.

Referenced by channel(), DTTopology(), firstChannel(), isWireValid(), lastChannel(), localPosition(), measurementPosition(), and wirePosition().

theHeight

const float DTTopology::theHeight = 1.3

staticprivate

Definition at line 102 of file DTTopology.h.

Referenced by cellHeight(), DTTopology(), and sensibleHeight().

theLength

float DTTopology::theLength

private

Definition at line 103 of file DTTopology.h.

Referenced by cellLenght(), DTTopology(), localError(), localPosition(), measurementError(), and measurementPosition().

theNChannels

int DTTopology::theNChannels

private

Definition at line 99 of file DTTopology.h.

Referenced by channels(), DTTopology(), and lastChannel().

theOffSet

Local2DPoint DTTopology::theOffSet

private

Definition at line 110 of file DTTopology.h.

Referenced by channel(), DTTopology(), localPosition(), measurementPosition(), and wirePosition().

theWidth

const float DTTopology::theWidth = 4.2

staticprivate

Definition at line 101 of file DTTopology.h.

Referenced by cellWidth(), channel(), DTTopology(), localError(), localPosition(), measurementError(), measurementPosition(), sensibleWidth(), and wirePosition().