PixelRecoLineRZ Class Reference

#include <PixelRecoLineRZ.h>

Public Types
typedef PixelRecoPointRZ	LineOrigin

Public Member Functions
float	cotLine () const
LineOrigin	origin () const
	PixelRecoLineRZ ()
	PixelRecoLineRZ (const GlobalPoint &p1, const GlobalPoint &p2)
	PixelRecoLineRZ (const LineOrigin &aOrigin, float aCotLine, float transverseIP=0.f)
	PixelRecoLineRZ (const LineOrigin &aOrigin, const PixelRecoPointRZ &aPoint, float transverseIP=0.f)
float	rAtZ (float z) const
float	transverseIP () const
float	transverseIP2 () const
float	zAtR (float r) const

Private Member Functions
float	addTIP (float val) const
float	subTIP (float val) const

Static Private Member Functions
static float	initCot (float dz, float dr)
static float	initTIP2 (float x1, float y1, float x2, float y2)

Private Attributes
float	theCotLine
LineOrigin	theOrigin
float	theTIP2

Detailed Description

two dimensional line in r-z coordinates. line is defined by the point and cotangent

Definition at line 12 of file PixelRecoLineRZ.h.

Member Typedef Documentation

typedef PixelRecoPointRZ PixelRecoLineRZ::LineOrigin

Definition at line 15 of file PixelRecoLineRZ.h.

Constructor & Destructor Documentation

PixelRecoLineRZ::PixelRecoLineRZ ( )

inline

Definition at line 17 of file PixelRecoLineRZ.h.

{ }

PixelRecoLineRZ::PixelRecoLineRZ ( const GlobalPoint &  p1, const GlobalPoint &  p2  )

inline

Definition at line 19 of file PixelRecoLineRZ.h.

    : theTIP2 ( initTIP2( p1.x(), p1.y(), p2.x(), p2.y() ) ),
      theOrigin ( LineOrigin( subTIP(p1.perp()), p1.z() ) ),
      theCotLine ( initCot( p2.z()-theOrigin.z(), subTIP(p2.perp())-theOrigin.r() ) )
    { }

PixelRecoLineRZ::PixelRecoLineRZ ( const LineOrigin &  aOrigin, float  aCotLine, float  transverseIP = 0.f  )

inline

Definition at line 25 of file PixelRecoLineRZ.h.

    : theTIP2( transverseIP*transverseIP ),
      theOrigin( subTIP(aOrigin.r()), aOrigin.z() ),
      theCotLine(aCotLine) { }

PixelRecoLineRZ::PixelRecoLineRZ ( const LineOrigin &  aOrigin, const PixelRecoPointRZ &  aPoint, float  transverseIP = 0.f  )

inline

Definition at line 30 of file PixelRecoLineRZ.h.

    : theTIP2( transverseIP*transverseIP ),
      theOrigin( subTIP(aOrigin.r()), aOrigin.z() ),
      theCotLine( initCot( aPoint.z()-theOrigin.z(), subTIP(aPoint.r())-theOrigin.r() ) )
    { } 

Member Function Documentation

float PixelRecoLineRZ::addTIP ( float  val ) const

inlineprivate

Definition at line 55 of file PixelRecoLineRZ.h.

References mathSSE::sqrt(), and theTIP2.

Referenced by origin(), and rAtZ().

    { return theTIP2 ? std::sqrt(val * val + theTIP2) : val; }

float PixelRecoLineRZ::cotLine ( ) const

inline

Definition at line 36 of file PixelRecoLineRZ.h.

References theCotLine.

Referenced by ThirdHitCorrection::init(), MultipleScatteringParametrisation::operator()(), and L1MuonPixelTrackFitter::valCotTheta().

{ return theCotLine; }

static float PixelRecoLineRZ::initCot ( float  dz, float  dr  )

inlinestaticprivate

Definition at line 47 of file PixelRecoLineRZ.h.

References funct::abs(), alignCSCRings::e, and f.

    { return (std::abs(dr) > 1.e-4f)  ? dz/dr : 99999.f; }

static float PixelRecoLineRZ::initTIP2 ( float  x1, float  y1, float  x2, float  y2  )

inlinestaticprivate

Definition at line 49 of file PixelRecoLineRZ.h.

References ConfigFiles::l.

    {
      double l = y1 * (x2 - x1) - x1 * (y2 - y1);
      return l * l / ( (x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1) );
    }

LineOrigin PixelRecoLineRZ::origin ( ) const

inline

Definition at line 39 of file PixelRecoLineRZ.h.

References addTIP(), PixelRecoPointRZ::r(), theOrigin, and PixelRecoPointRZ::z().

{ return LineOrigin( addTIP(theOrigin.r()), theOrigin.z() ); }

float PixelRecoLineRZ::rAtZ ( float  z ) const

inline

Definition at line 43 of file PixelRecoLineRZ.h.

References funct::abs(), addTIP(), alignCSCRings::e, f, PixelRecoPointRZ::r(), theCotLine, theOrigin, and PixelRecoPointRZ::z().

Referenced by MSLayer::crossing().

    { return (std::abs(theCotLine) > 1.e-4f) ? addTIP(theOrigin.r()+(z-theOrigin.z())/theCotLine) : 99999.f; }

float PixelRecoLineRZ::subTIP ( float  val ) const

inlineprivate

Definition at line 57 of file PixelRecoLineRZ.h.

References mathSSE::sqrt(), and theTIP2.

Referenced by zAtR().

    {
      if (!theTIP2) return val;
      float val2 = val * val;
      return val2 > theTIP2 ? std::sqrt(val2 - theTIP2) : 0.;
    }

float PixelRecoLineRZ::transverseIP ( ) const

inline

Definition at line 37 of file PixelRecoLineRZ.h.

References mathSSE::sqrt(), and theTIP2.

{ return std::sqrt(theTIP2); }

float PixelRecoLineRZ::transverseIP2 ( ) const

inline

Definition at line 38 of file PixelRecoLineRZ.h.

References theTIP2.

{ return theTIP2; }

float PixelRecoLineRZ::zAtR ( float  r ) const

inline

Definition at line 41 of file PixelRecoLineRZ.h.

References PixelRecoPointRZ::r(), subTIP(), theCotLine, theOrigin, and PixelRecoPointRZ::z().

Referenced by MSLayer::crossing().

    { return theOrigin.z()+(subTIP(r)-theOrigin.r())*theCotLine; }

Member Data Documentation

float PixelRecoLineRZ::theCotLine

private

Definition at line 67 of file PixelRecoLineRZ.h.

Referenced by cotLine(), rAtZ(), and zAtR().

LineOrigin PixelRecoLineRZ::theOrigin

private

Definition at line 66 of file PixelRecoLineRZ.h.

Referenced by origin(), rAtZ(), and zAtR().

float PixelRecoLineRZ::theTIP2

private

Definition at line 65 of file PixelRecoLineRZ.h.

Referenced by addTIP(), subTIP(), transverseIP(), and transverseIP2().