Line Class Reference

#include <Line.h>

Public Types
typedef GlobalVector	DirectionType
typedef GlobalPoint	PositionType

Public Member Functions
GlobalPoint	closerPointToLine (const Line &aLine) const
DirectionType	direction () const
GlobalVector	distance (const Line &aLine) const
GlobalVector	distance (const GlobalPoint &aPoint) const
	Line ()
	Line (PositionType &pos, DirectionType &dir)
PositionType	position () const
	~Line ()

Private Attributes
DirectionType	theDir
PositionType	thePos

Detailed Description

A line in 3D space.

Definition at line 10 of file Line.h.

Member Typedef Documentation

typedef GlobalVector Line::DirectionType

Definition at line 14 of file Line.h.

typedef GlobalPoint Line::PositionType

Definition at line 13 of file Line.h.

Constructor & Destructor Documentation

Line::Line ( )

inline

Definition at line 16 of file Line.h.

{}

Line::Line ( PositionType &  pos, DirectionType &  dir  )

inline

Definition at line 19 of file Line.h.

                                               :
  thePos(pos), theDir(dir.unit()) {}

Line::~Line ( )

inline

Definition at line 22 of file Line.h.

{};

Member Function Documentation

GlobalPoint Line::closerPointToLine ( const Line &  aLine ) const

inline

Definition at line 29 of file Line.h.

References direction(), Vector3DBase< T, FrameTag >::dot(), position(), class-composition::Q, theDir, and thePos.

Referenced by TrajectoryExtrapolatorToLine::extrapolate(), and AnalyticalTrajectoryExtrapolatorToLine::extrapolateSingleState().

                                                         {

GlobalPoint  V = aLine.position();
GlobalVector J = aLine.direction();
GlobalVector Q = theDir - J.dot(theDir) * J;
double lambda = Q.dot(V-thePos)/Q.dot(theDir);
return   thePos + lambda*theDir;
}

DirectionType Line::direction ( ) const

inline

Definition at line 27 of file Line.h.

References theDir.

Referenced by closerPointToLine(), distance(), TSCBLBuilderWithPropagator::operator()(), and HelixExtrapolatorToLine2Order::pathLength().

{ return theDir;}

GlobalVector Line::distance ( const Line &  aLine ) const

inline

Definition at line 38 of file Line.h.

References Vector3DBase< T, FrameTag >::cross(), direction(), Vector3DBase< T, FrameTag >::dot(), position(), theDir, thePos, and csvLumiCalc::unit.

Referenced by SignedImpactParameter3D::distanceWithJetAxis(), TrajectoryExtrapolatorToLine::extrapolate(), and IPTools::jetTrackDistance().

                                                 {

GlobalPoint  V = aLine.position();
GlobalVector J = aLine.direction();
GlobalVector P = (theDir.cross(J)).unit();
GlobalVector D;
D= P.dot(thePos-V) * P;
return D;
}

GlobalVector Line::distance ( const GlobalPoint &  aPoint ) const

inline

Definition at line 48 of file Line.h.

References Vector3DBase< T, FrameTag >::dot(), theDir, thePos, PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

                                                        {

GlobalVector P(aPoint.x(),aPoint.y(),aPoint.z());
GlobalVector T0(thePos.x(),thePos.y(),thePos.z());
return T0-P + theDir.dot(P-T0) * theDir;
}

PositionType Line::position ( ) const

inline

Definition at line 26 of file Line.h.

References thePos.

Referenced by closerPointToLine(), distance(), SignedImpactParameter3D::distanceWithJetAxis(), IPTools::jetTrackDistance(), and HelixExtrapolatorToLine2Order::pathLength().

{ return thePos;}

Member Data Documentation

DirectionType Line::theDir

private

Definition at line 57 of file Line.h.

Referenced by closerPointToLine(), direction(), and distance().

PositionType Line::thePos

private

Definition at line 56 of file Line.h.

Referenced by closerPointToLine(), distance(), and position().