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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 | ||
f531a546 | 16 | // $Id$ |
959fbac5 | 17 | |
18 | /////////////////////////////////////////////////////////////////////////// | |
19 | // Class Ali4VectorObj | |
20 | // Handling of Lorentz 4-vectors in various reference frames. | |
21 | // | |
22 | // This class is meant to provide an Ali4Vector object which is derived | |
23 | // from TObject such that it can be stored in e.g. TObjArray etc... | |
24 | // and that it can be written out using the ROOT I/O machinery. | |
25 | // | |
26 | // Example : | |
27 | // ========= | |
28 | // | |
29 | // Float_t a[4]={5,1,2,3}; | |
30 | // Float_t ea[4]={0.05,0.01,0.02,0.03}; | |
31 | // Float_t b[4]={10,4,5,6}; | |
32 | // Float_t eb[4]={0.1,0.04,0.05,0.06}; | |
33 | // | |
34 | // Ali4Vector v,w; | |
35 | // | |
36 | // v.SetVector(a,"car"); | |
37 | // v.SetErrors(ea,"car"); | |
38 | // w.SetVector(b,"car"); | |
39 | // w.SetErrors(eb,"car"); | |
40 | // | |
41 | // Ali4Vector add=v+w; | |
42 | // | |
43 | // Ali4Vector sub=v-w; | |
44 | // | |
45 | // Ali4VectorObj vec1(add); | |
46 | // | |
47 | // Ali4VectorObj vec2; | |
48 | // vec2.Load(sub); | |
49 | // | |
50 | // vec1.Info(); | |
51 | // vec2.Info(); | |
52 | // | |
53 | //--- Author: Nick van Eijndhoven 18-oct-1999 UU-SAP Utrecht | |
f531a546 | 54 | //- Modified: NvE $Date$ UU-SAP Utrecht |
959fbac5 | 55 | /////////////////////////////////////////////////////////////////////////// |
56 | ||
57 | #include "Ali4VectorObj.h" | |
58 | ||
59 | ClassImp(Ali4VectorObj) // Class implementation to enable ROOT I/O | |
60 | ||
61 | Ali4VectorObj::Ali4VectorObj() | |
62 | { | |
63 | // Creation of an Ali4VectorObj object and initialisation of parameters. | |
64 | // All attributes initialised to 0. | |
65 | } | |
66 | /////////////////////////////////////////////////////////////////////////// | |
67 | Ali4VectorObj::Ali4VectorObj(Ali4Vector& q) | |
68 | { | |
69 | // Creation of an Ali3VectorObj object and initialisation of parameters. | |
70 | // All attributes are initialised to the values of the input Ali3Vector. | |
71 | Load(q); | |
72 | } | |
73 | /////////////////////////////////////////////////////////////////////////// | |
74 | Ali4VectorObj::~Ali4VectorObj() | |
75 | { | |
76 | // Destructor to delete dynamically allocated memory. | |
77 | } | |
78 | /////////////////////////////////////////////////////////////////////////// | |
79 | void Ali4VectorObj::Load(Ali4Vector& q) | |
80 | { | |
81 | // Load all attributes of the input Ali4Vector into this Ali4VectorObj object. | |
82 | Int_t temp1=q.GetScalarFlag(); | |
83 | Double_t temp2=q.GetResultError(); | |
84 | Double_t a[4]; | |
85 | q.GetVector(a,"sph"); | |
86 | SetVector(a,"sph"); | |
87 | q.GetErrors(a,"car"); | |
88 | SetErrors(a,"car"); | |
89 | fScalar=temp1; | |
90 | fDresult=temp2; | |
91 | } | |
92 | /////////////////////////////////////////////////////////////////////////// |