KVFrameTransform Class Reference

Detailed Description

Utility class for kinematical transformations of KVParticle class.

Created by KVClassFactory on Thu Jan 19 15:37:43 2017 Author: John Frankland,,,

This class is used as a generic argument for the KVEvent::SetFrame() and KVParticle::SetFrame() methods (amongst others).

It is not always necessary to explicitly use this class when calling these methods. Any class for which a single-argument KVFrameTransform constructor is defined can be used, even a temporary (unnamed) object:

e.g. for KVParticle::SetFrame(const Char_t* frame, const KVFrameTransform& ft) the following calls are valid:

KVParticle p;
TVector3 boost(0,0,3.0);// in cm/ns
p.SetFrame("toto", boost);
p.SetFrame("toto", TVector3(0,0,3.0)); // same effect as previous
TRotation rot;
rot.RotateZ(TMath::PiOver2()); // 90 deg. rotation around beam
p.SetFrame("titi", rot);

On the other hand, when more than one argument to the KVFrameTransform constructor is required, before C++11 you had to explicitly call the constructor in question, although once again it is sufficient to use a temporary object in the method call:

p.SetFrame("tata", KVFrameTransform(TVector3(0,0,0.1),kTRUE));
 --> boost to frame moving at 0.1c in beam direction
 
p.SetFrame("tutu", KVFrameTransform(rot, TVector3(0,0,0.1), kTRUE));
 --> rotation around beam axis followed by boost 0.1c

With C++11 this becomes

p.SetFrame("tata", {TVector3(0,0,0.1),kTRUE});
 --> boost to frame moving at 0.1c in beam direction
 
p.SetFrame("tutu", {rot, TVector3(0,0,0.1), kTRUE});
 --> rotation around beam axis followed by boost 0.1c

Note

for boosts, default units are cm/ns

for rotations (TRotation), default units are radians

Definition at line 61 of file KVFrameTransform.h.

#include <KVFrameTransform.h>

Inheritance diagram for KVFrameTransform:

Public Member Functions
	KVFrameTransform ()
	KVFrameTransform (const KVFrameTransform &r)
	Copy constructor. More...
	KVFrameTransform (const TLorentzRotation &r)
	Construct frame transformation using a TLorentzRotation. More...
	KVFrameTransform (const TRotation &r)
	Construct frame transformation using rotation of axes. More...
	KVFrameTransform (const TRotation &r, const TVector3 &boost, Bool_t beta=kFALSE)
	KVFrameTransform (const TVector3 &boost, Bool_t beta=kFALSE)
	KVFrameTransform (const TVector3 &boost, const TRotation &r, Bool_t beta=kFALSE)
virtual	~KVFrameTransform ()
KVFrameTransform &	operator= (const KVFrameTransform &)
	assignment by copy More...

Constructor & Destructor Documentation

KVFrameTransform() [1/7]

KVFrameTransform::KVFrameTransform ( )

inline

Definition at line 63 of file KVFrameTransform.h.

KVFrameTransform() [2/7]

KVFrameTransform::KVFrameTransform	(	const TVector3 &	boost,
		Bool_t	beta = kFALSE
	)

Construct frame transformation using velocity boost vector if beta=kTRUE, velocity given in light speed units if beta=kFALSE [default], velocity given in cm/ns units.

Definition at line 16 of file KVFrameTransform.cpp.

KVFrameTransform() [3/7]

KVFrameTransform::KVFrameTransform

(

const TRotation &

r

)

Construct frame transformation using rotation of axes.

Definition at line 37 of file KVFrameTransform.cpp.

KVFrameTransform() [4/7]

KVFrameTransform::KVFrameTransform

(

const TLorentzRotation &

r

)

Construct frame transformation using a TLorentzRotation.

Definition at line 49 of file KVFrameTransform.cpp.

KVFrameTransform() [5/7]

KVFrameTransform::KVFrameTransform

(

const KVFrameTransform &

r

)

Copy constructor.

Definition at line 60 of file KVFrameTransform.cpp.

KVFrameTransform() [6/7]

KVFrameTransform::KVFrameTransform	(	const TVector3 &	boost,
		const TRotation &	r,
		Bool_t	beta = kFALSE
	)

Construct frame transformation using rotation & velocity boost vector in the order: BOOST then ROTATION if beta=kTRUE, velocity given in light speed units if beta=kFALSE [default], velocity given in cm/ns units.

Definition at line 75 of file KVFrameTransform.cpp.

KVFrameTransform() [7/7]

KVFrameTransform::KVFrameTransform	(	const TRotation &	r,
		const TVector3 &	boost,
		Bool_t	beta = kFALSE
	)

Construct frame transformation using rotation & velocity boost vector in the order: ROTATION then BOOST if beta=kTRUE, velocity given in light speed units if beta=kFALSE [default], velocity given in cm/ns units.

Definition at line 100 of file KVFrameTransform.cpp.

~KVFrameTransform()

virtual KVFrameTransform::~KVFrameTransform ( )

inlinevirtual

Definition at line 71 of file KVFrameTransform.h.

Member Function Documentation

operator=()

KVFrameTransform & KVFrameTransform::operator=

(

const KVFrameTransform &

p

)

assignment by copy

Definition at line 121 of file KVFrameTransform.cpp.