New version of RALICE introduced
[u/mrichter/AliRoot.git] / RALICE / Ali4VectorObj.cxx
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959fbac5 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16/*
17$Log$
18*/
19
20///////////////////////////////////////////////////////////////////////////
21// Class Ali4VectorObj
22// Handling of Lorentz 4-vectors in various reference frames.
23//
24// This class is meant to provide an Ali4Vector object which is derived
25// from TObject such that it can be stored in e.g. TObjArray etc...
26// and that it can be written out using the ROOT I/O machinery.
27//
28// Example :
29// =========
30//
31// Float_t a[4]={5,1,2,3};
32// Float_t ea[4]={0.05,0.01,0.02,0.03};
33// Float_t b[4]={10,4,5,6};
34// Float_t eb[4]={0.1,0.04,0.05,0.06};
35//
36// Ali4Vector v,w;
37//
38// v.SetVector(a,"car");
39// v.SetErrors(ea,"car");
40// w.SetVector(b,"car");
41// w.SetErrors(eb,"car");
42//
43// Ali4Vector add=v+w;
44//
45// Ali4Vector sub=v-w;
46//
47// Ali4VectorObj vec1(add);
48//
49// Ali4VectorObj vec2;
50// vec2.Load(sub);
51//
52// vec1.Info();
53// vec2.Info();
54//
55//--- Author: Nick van Eijndhoven 18-oct-1999 UU-SAP Utrecht
56///////////////////////////////////////////////////////////////////////////
57
58#include "Ali4VectorObj.h"
59
60ClassImp(Ali4VectorObj) // Class implementation to enable ROOT I/O
61
62Ali4VectorObj::Ali4VectorObj()
63{
64// Creation of an Ali4VectorObj object and initialisation of parameters.
65// All attributes initialised to 0.
66}
67///////////////////////////////////////////////////////////////////////////
68Ali4VectorObj::Ali4VectorObj(Ali4Vector& q)
69{
70// Creation of an Ali3VectorObj object and initialisation of parameters.
71// All attributes are initialised to the values of the input Ali3Vector.
72 Load(q);
73}
74///////////////////////////////////////////////////////////////////////////
75Ali4VectorObj::~Ali4VectorObj()
76{
77// Destructor to delete dynamically allocated memory.
78}
79///////////////////////////////////////////////////////////////////////////
80void Ali4VectorObj::Load(Ali4Vector& q)
81{
82// Load all attributes of the input Ali4Vector into this Ali4VectorObj object.
83 Int_t temp1=q.GetScalarFlag();
84 Double_t temp2=q.GetResultError();
85 Double_t a[4];
86 q.GetVector(a,"sph");
87 SetVector(a,"sph");
88 q.GetErrors(a,"car");
89 SetErrors(a,"car");
90 fScalar=temp1;
91 fDresult=temp2;
92}
93///////////////////////////////////////////////////////////////////////////