Trk::LineSaggingDescriptor Class Reference

#include <LineSaggingDescriptor.h>

Inheritance diagram for Trk::LineSaggingDescriptor:

Collaboration diagram for Trk::LineSaggingDescriptor:

Public Member Functions
	LineSaggingDescriptor ()
	Default Constructor. More...
	LineSaggingDescriptor (double wireLength, double wireTension, double linearDensity)
	Constructor with arguments. More...
	LineSaggingDescriptor (const LineSaggingDescriptor &lsd)
	Constructor with arguments. More...
	~LineSaggingDescriptor ()=default
	Destructor. More...
virtual LineSaggingDescriptor *	clone () const override final
	clone() method to make deep copy in Surface copy constructor and for assigment operator of the Surface class. More...
LineSaggingDescriptor &	operator= (const LineSaggingDescriptor &lsd)
	Assignment operator. More...
Amg::Transform3D *	correctedSurfaceTransform (const Amg::Vector2D &locp, const Amg::Vector3D &lineCenter, const Amg::Vector3D &lineDirection, double cosFi=0.) const
	Get the HepGeom::Transform3D* for the corrected Surface. More...
MsgStream &	dump (MsgStream &sl) const override final
	Output Method for MsgStream, to be overloaded by child classes. More...
std::ostream &	dump (std::ostream &sl) const override final
	Output Method for std::ostream, to be overloaded by child classes. More...

Protected Attributes
double	m_wireLength
	< the wire end positions More...
double	m_wireTension
double	m_linearDensity

Static Protected Attributes
static const double	s_elecStatFactor
	direction of gravity More...
static const Amg::Vector3D	s_gravityDirection = -1 * Amg::Vector3D::UnitY()
static const Amg::Vector3D	s_referenceDirection

Detailed Description

Fill in documentation

Author

Andre.nosp@m.as.S.nosp@m.alzbu.nosp@m.rger.nosp@m.@cern.nosp@m..ch

Definition at line 33 of file LineSaggingDescriptor.h.

Constructor & Destructor Documentation

LineSaggingDescriptor() [1/3]

Trk::LineSaggingDescriptor::LineSaggingDescriptor ( )

inline

Default Constructor.

Definition at line 38 of file LineSaggingDescriptor.h.

                             :m_wireLength{},m_wireTension{},m_linearDensity{}{
        //nop
      }

LineSaggingDescriptor() [2/3]

Trk::LineSaggingDescriptor::LineSaggingDescriptor	(	double	wireLength,
		double	wireTension,
		double	linearDensity
	)

Constructor with arguments.

Definition at line 26 of file LineSaggingDescriptor.cxx.

                                                                        :
   Trk::DistortionDescriptor(),
   m_wireLength(wireLength),
   m_wireTension(wireTension),
   m_linearDensity(linearDensity)
{
 
}

LineSaggingDescriptor() [3/3]

Trk::LineSaggingDescriptor::LineSaggingDescriptor

(

const LineSaggingDescriptor &

lsd

)

Constructor with arguments.

Definition at line 38 of file LineSaggingDescriptor.cxx.

                                                                                :
   Trk::DistortionDescriptor(),
   m_wireLength(lsd.m_wireLength),
   m_wireTension(lsd.m_wireTension),
   m_linearDensity(lsd.m_linearDensity)
{}

~LineSaggingDescriptor()

Trk::LineSaggingDescriptor::~LineSaggingDescriptor ( )

default

Destructor.

Member Function Documentation

clone()

LineSaggingDescriptor * Trk::LineSaggingDescriptor::clone ( ) const

inlinefinaloverridevirtual

clone() method to make deep copy in Surface copy constructor and for assigment operator of the Surface class.

Implements Trk::DistortionDescriptor.

Definition at line 88 of file LineSaggingDescriptor.h.

  { return new LineSaggingDescriptor(*this); }

correctedSurfaceTransform()

Amg::Transform3D * Trk::LineSaggingDescriptor::correctedSurfaceTransform	(	const Amg::Vector2D &	locp,
		const Amg::Vector3D &	lineCenter,
		const Amg::Vector3D &	lineDirection,
		double	cosFi = 0.
	)		const

Get the HepGeom::Transform3D* for the corrected Surface.

Definition at line 57 of file LineSaggingDescriptor.cxx.

{
  // calculate scale product between gravity and wire
  double cosLineGrav = s_gravityDirection.dot(lineDirection);
 
  // calculate cos angle between gravity direction and wire sagging direction
  cosFi = sqrt( 1 - cosLineGrav*cosLineGrav );
  
  // create new vector pointing perpendicular to the wire
  // sag should be pointing down, init with global direction of global negative y-axis 
  Amg::Vector3D sagDir = s_gravityDirection;
  
  // if gravity and wire sagging direction are not point in same direction, recalculate sag direction
  if (cosFi > 0.001 ){
      sagDir = (s_gravityDirection - cosLineGrav*lineDirection);
      sagDir = sagDir.unit();
  }
  
  // wlsquare  
  double wireLengthSquare= m_wireLength*m_wireLength;
 
  // calculate reference sag per meter square
  double refSagPerMeterSq = 100.0*(m_linearDensity*s_elecStatFactor)/(8.*m_wireTension);
 
  // compute maximum sag in microns use wireln in m,
  double sagMax = refSagPerMeterSq*(wireLengthSquare*1e-9); // (*10e-6*0.001)
  double actualSagMax = sagMax*cosFi;
  double s=locp[Trk::locZ]; 
 
  // sag in microns where at longitudinal location of the hit
  double sag=(1.0-4.*((s*s)/(wireLengthSquare)))*actualSagMax;
 
  // new center position
  Amg::Translation3D newCenter(lineCenter+sag*sagDir);
 
  // new z direction - build d(sag)/d(z)
  //double dsagdz = 8.0*s*sagMax/wireLengthSquare;
  // and the vector
  const Amg::Vector3D& newLineDir(lineDirection);
  // build the other vectors
  Amg::Vector3D newLineY(newLineDir.cross(sagDir)); 
  // build the x vector
  Amg::Vector3D newLineX(newLineY.cross(newLineDir));
  
  Amg::RotationMatrix3D rot;
  rot.col(0) =  newLineX;
  rot.col(1) =  newLineY;
  rot.col(2) =  newLineDir;
  
  // new transform
  Amg::Transform3D* newLineTransform = new Amg::Transform3D;
  (*newLineTransform) = rot;
  (*newLineTransform) *= newCenter;
 
  return newLineTransform; // ! (newRotation, newCenter);
 
}

dump() [1/2]

MsgStream & Trk::LineSaggingDescriptor::dump ( MsgStream &  sl ) const

finaloverridevirtual

Output Method for MsgStream, to be overloaded by child classes.

Implements Trk::DistortionDescriptor.

Definition at line 119 of file LineSaggingDescriptor.cxx.

{
    sl << std::setiosflags(std::ios::fixed);
    sl << std::setprecision(7);
    sl << "Trk::LineSaggingDescriptor";
    sl <<  '\t' << "- wire length    :" << m_wireLength    << std::endl;
    sl <<  '\t' << "- wire tension   :" << m_wireTension   << std::endl;
    sl <<  '\t' << "- linear density :" << m_linearDensity << std::endl;
    sl << std::setprecision(-1);
    return sl;
}

dump() [2/2]

std::ostream & Trk::LineSaggingDescriptor::dump ( std::ostream &  sl ) const

finaloverridevirtual

Output Method for std::ostream, to be overloaded by child classes.

Implements Trk::DistortionDescriptor.

Definition at line 131 of file LineSaggingDescriptor.cxx.

{
    sl << std::setiosflags(std::ios::fixed);
    sl << std::setprecision(7);
    sl << "Trk::LineSaggingDescriptor:";
    sl <<  '\t' << "- wire length    :" << m_wireLength    << std::endl;
    sl <<  '\t' << "- wire tension   :" << m_wireTension   << std::endl;
    sl <<  '\t' << "- linear density :" << m_linearDensity << std::endl;
    sl << std::setprecision(-1);
    return sl;
}

operator=()

Trk::LineSaggingDescriptor & Trk::LineSaggingDescriptor::operator=

(

const LineSaggingDescriptor &

lsd

)

Assignment operator.

Definition at line 46 of file LineSaggingDescriptor.cxx.

{
  if (this!=&lsd){
    m_wireLength    = lsd.m_wireLength;
    m_wireTension   = lsd.m_wireTension;
    m_linearDensity = lsd.m_linearDensity;
  }
  return(*this);
}

Member Data Documentation

m_linearDensity

double Trk::LineSaggingDescriptor::m_linearDensity

protected

Definition at line 76 of file LineSaggingDescriptor.h.

m_wireLength

double Trk::LineSaggingDescriptor::m_wireLength

protected

< the wire end positions

Definition at line 74 of file LineSaggingDescriptor.h.

m_wireTension

double Trk::LineSaggingDescriptor::m_wireTension

protected

Definition at line 75 of file LineSaggingDescriptor.h.

s_elecStatFactor

const double Trk::LineSaggingDescriptor::s_elecStatFactor

staticprotected

direction of gravity

Definition at line 79 of file LineSaggingDescriptor.h.

s_gravityDirection

const Amg::Vector3D Trk::LineSaggingDescriptor::s_gravityDirection = -1 * Amg::Vector3D::UnitY()

staticprotected

Definition at line 80 of file LineSaggingDescriptor.h.

s_referenceDirection

const Amg::Vector3D Trk::LineSaggingDescriptor::s_referenceDirection

staticprotected

Definition at line 81 of file LineSaggingDescriptor.h.

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

• LineSaggingDescriptor.h
• LineSaggingDescriptor.cxx