1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
21 This macro performs the misalignment on an existing muon arm geometry
22 based on the standard definition of the detector elements in
25 It uses AliMUONGeometryAligner :
26 --> creates a new AliMUONGeometryTransformer and AliMUONGeometryAligner
27 --> reads the transformations in from the transform.dat file (make sure that
28 this file is the _standard_ one by comparing it to the one in CVS)
29 --> creates a second AliMUONGeometryTransformer by misaligning the existing
30 one using AliMUONAligner::MisAlign
31 --> User has to specify the magnitude of the alignments, in the Cartesian
32 co-ordiantes (which are used to apply translation misalignments) and in the
33 spherical co-ordinates (which are used to apply angular displacements)
34 --> User can also set misalignment ranges by hand using the methods :
35 SetMaxCartMisAlig, SetMaxAngMisAlig, SetXYAngMisAligFactor
36 (last method takes account of the fact that the misalingment is greatest in
37 the XY plane, since the detection elements are fixed to a support structure
38 in this plane. Misalignments in the XZ and YZ plane will be very small
39 compared to those in the XY plane, which are small already - of the order
41 --> Default behavior generates a "residual" misalignment using gaussian
42 distributions. Uniform distributions can still be used, see
43 AliMUONGeometryAligner.
44 --> User can also generate module misalignments using SetModuleCartMisAlig
45 and SetModuleAngMisAlig
46 Note : If the detection elements are allowed to be misaligned in all
47 directions, this has consequences for the alignment algorithm, which
48 needs to know the number of free parameters. Eric only allowed 3 :
49 x,y,theta_xy, but in principle z and the other two angles are alignable
52 // Author:Bruce Becker
56 #if !defined(__CINT__) || defined(__MAKECINT__)
58 #include "AliMUONGeometryTransformer.h"
59 #include "AliMUONGeometryMisAligner.h"
61 #include "AliGeomManager.h"
62 #include "AliCDBManager.h"
63 #include "AliCDBMetaData.h"
66 #include <TGeoManager.h>
67 #include <TClonesArray.h>
71 void MUONCheckMisAligner(Double_t xcartmisaligm = 0.0, Double_t xcartmisaligw = 0.004,
72 Double_t ycartmisaligm = 0.0, Double_t ycartmisaligw = 0.003,
73 Double_t angmisaligm = 0.0, Double_t angmisaligw = 0.0023,
74 TString nameCDB = "ResMisAlignCDB",
75 const TString& geomFileName = "geometry.root")
78 AliMUONGeometryTransformer *transform = new AliMUONGeometryTransformer();
79 transform->LoadGeometryData(geomFileName.Data());
81 AliMUONGeometryMisAligner misAligner(xcartmisaligm,xcartmisaligw,
82 ycartmisaligm,ycartmisaligw,
83 angmisaligm,angmisaligw);
85 // Generate mis alignment data
87 // Uncomment lines below if you would like to generate module misalignments
88 // misAligner.SetModuleCartMisAlig(0.0,0.1,0.0,0.1,0.0,0.1); // Full
89 // misAligner.SetModuleAngMisAlig(0.0,0.02,0.0,0.04,0.0,0.02); // Full
90 // misAligner.SetModuleCartMisAlig(0.0,0.003,0.0,0.003,0.0,0.003); // Res
91 // misAligner.SetModuleAngMisAlig(0.0,0.0006,0.0,0.001,0.0,0.0005); // Res
93 AliMUONGeometryTransformer *newTransform = misAligner.MisAlign(transform,true);
94 newTransform->WriteTransformations("transform2.dat");
95 newTransform->WriteMisAlignmentData("misalign.root");
97 // Apply misAlignment via AliRoot framework
98 AliGeomManager::ApplyAlignObjsToGeom(
99 *const_cast<TClonesArray*>(newTransform->GetMisAlignmentData()));
100 // Save new geometry file
101 gGeoManager->Export("geometry2.root");
103 // Extract new transformations
104 AliMUONGeometryTransformer* transform3 = new AliMUONGeometryTransformer();
105 transform3->LoadGeometryData("geometry2.root");
106 transform3->WriteTransformations("transform3.dat");
107 // Check that transform3.dat is equal to transform2.dat
109 // Generate misaligned data in local cdb
110 const TClonesArray* array = newTransform->GetMisAlignmentData();
112 TString sLocCDB("local://");
115 AliCDBManager* cdbManager = AliCDBManager::Instance();
116 cdbManager->SetDefaultStorage(sLocCDB.Data());
118 AliCDBMetaData* cdbData = new AliCDBMetaData();
119 cdbData->SetResponsible("Dimuon Offline project");
120 cdbData->SetComment("MUON alignment objects with residual misalignment");
121 AliCDBId id("MUON/Align/Data", 0, 0);
122 cdbManager->Put(const_cast<TClonesArray*>(array), id, cdbData);
124 // To run simulation with misaligned geometry, you have to set
125 // the Align option in Config.C:
126 // MUON->SetAlign("transform2.dat");