#ifndef ALI3VECTOR_H
#define ALI3VECTOR_H
-///////////////////////////////////////////////////////////////////////////
-// Class Ali3Vector
-// Handling of 3-vectors in various reference frames.
-//
-// This class is meant to serve as a base class for ALICE objects
-// that have 3-dimensional vector characteristics.
-//
-// Note :
-// ------
-// Vectors (v) and reference frames (f) are specified via
-// SetVector(Float_t* v,TString f) under the following conventions :
-//
-// f="car" ==> v in Cartesian coordinates (x,y,z)
-// f="sph" ==> v in Spherical coordinates (r,theta,phi)
-// f="cyl" ==> v in Cylindrical coordinates (rho,phi,z)
-//
-// All angles are in radians.
-//
-// Example :
-// ---------
-//
-// Ali3Vector a;
-// Float_t v[3]={-1,25,7};
-// a.SetVector(v,"car");
-// a.Info();
-//
-// Float_t vec[3];
-// a.GetVector(vec,"sph");
-//
-// Ali3Vector b;
-// Float_t v2[3]={6,-18,33};
-// b.SetVector(v2,"car");
-//
-// Float_t dotpro=a.Dot(b);
-//
-// Ali3Vector c=a.Cross(b);
-// c.Info("sph");
-// c.GetVector(vec,"cyl");
-// Float_t norm=c.GetNorm();
-// c=a+b;
-// c=a-b;
-// c=a*5;
-//
-//--- NvE 30-mar-1999 UU-SAP Utrecht
-///////////////////////////////////////////////////////////////////////////
+/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * See cxx source for full Copyright notice */
+
+// $Id$
-#include <iostream.h>
#include <math.h>
#include "TObject.h"
#include "TString.h"
+#include "TRotMatrix.h"
class Ali3Vector
{
public:
Ali3Vector(); // Default constructor
virtual ~Ali3Vector(); // Destructor
- virtual void SetVector(Double_t* v,TString f); // Store vector v in frame f
- virtual void GetVector(Double_t* v,TString f); // Provide vector v in frame f
- virtual void SetVector(Float_t* v,TString f); // Store vector v in frame f
- virtual void GetVector(Float_t* v,TString f); // Provide vector v in frame f
- virtual void Info(TString f="car"); // Print vector components in frame f
+ Ali3Vector(const Ali3Vector& v); // Copy constructor
+ virtual void Load(Ali3Vector& q); // Load all attributes of input Ali3Vector
+ virtual void SetZero(); // (Re)set all attributes to zero.
+ void SetVector(Double_t* v,TString f,TString u="rad"); // Store vector v in frame f with ang units u
+ void GetVector(Double_t* v,TString f,TString u="rad") const; // Provide vector v in frame f in ang units u
+ void SetVector(Float_t* v,TString f,TString u="rad"); // Store vector v in frame f with ang units u
+ void GetVector(Float_t* v,TString f,TString u="rad") const; // Provide vector v in frame f in ang units u
+ void SetErrors(Double_t* e,TString f,TString u="rad"); // Store errors of vector in frame f with ang units u
+ void GetErrors(Double_t* e,TString f,TString u="rad") const; // Provide errors of vector in frame f in ang units u
+ void SetErrors(Float_t* e,TString f,TString u="rad"); // Store errors of vector in frame f with ang units u
+ void GetErrors(Float_t* e,TString f,TString u="rad") const; // Provide errors of vector in frame f in ang units u
+ virtual void Data(TString f="car",TString u="rad") const; // Print vector components in frame f in ang units u
Double_t GetNorm(); // Provide norm of the vector
Double_t Dot(Ali3Vector& q); // Provide dot product with q
- Ali3Vector Cross(Ali3Vector& q); // Provide cross product with q
- Ali3Vector operator+(Ali3Vector& q); // Add vector q
- Ali3Vector operator-(Ali3Vector& q); // Subtract vector q
- Ali3Vector operator*(Double_t s); // Multiply vector with scalar s
- Ali3Vector operator/(Double_t s); // Divide vector by scalar s
+ Double_t GetPseudoRapidity(); // Provide the pseudorapidity w.r.t z-axis
+ Double_t GetResultError() const; // Provide error on scalar result (e.g. norm)
+ Ali3Vector Cross(Ali3Vector& q) const; // Provide cross product with q
+ Ali3Vector operator+(Ali3Vector& q) const; // Add vector q
+ Ali3Vector operator-(Ali3Vector& q) const; // Subtract vector q
+ Ali3Vector operator*(Double_t s) const; // Multiply vector with scalar s
+ Ali3Vector operator/(Double_t s) const; // Divide vector by scalar s
Ali3Vector& operator+=(Ali3Vector& q); // Add vector q
Ali3Vector& operator-=(Ali3Vector& q); // Subtract vector q
Ali3Vector& operator*=(Double_t s); // Multiply with scalar s
Ali3Vector& operator/=(Double_t s); // Divide by scalar s
+ Ali3Vector GetVecTrans() const; // Provide transverse vector w.r.t. z-axis
+ Ali3Vector GetVecLong() const; // Provide longitudinal vector w.r.t. z-axis
+ Ali3Vector GetPrimed(TRotMatrix* m) const; // Provide vector components in a rotated frame
+ Ali3Vector GetUnprimed(TRotMatrix* m) const; // Provide original vector components from a rotated one
+ Double_t GetX(Int_t i,TString f,TString u="rad"); // Provide i-th vector component in frame f in units u
+ virtual Double_t GetOpeningAngle(Ali3Vector& q,TString u="rad"); // Provide opening angle with q in units u
protected:
- Double_t fV,fTheta,fPhi; // Vector in spherical coordinates
+ Double32_t fV,fTheta,fPhi; // Vector in spherical coordinates
+ Double32_t fDx,fDy,fDz; // Errors on Cartesian coordinates
+ Double32_t fDresult; //! Error on scalar result (e.g. norm or dotproduct)
- ClassDef(Ali3Vector,1) // Class definition to enable ROOT I/O
+ ClassDef(Ali3Vector,11) // Handling of 3-vectors in various reference frames.
};
#endif
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