Implementation of single-event reconstruction for TPC. The clusterer is instantiated...
[u/mrichter/AliRoot.git] / HMPID / SurveyToAlignHmpid.C
CommitLineData
447e91ca 1TVector3 fFM[28]; //array of global coordinates for 28 fiducial marks
2Int_t sNch, oNch; // survey and offline chamber's number
3
4
5TGeoHMatrix GetResSurvAlign(Int_t survNch, Int_t& offNch);
6
7void SurveyToAlignHmpid(const char* filename="Survey_781282_HMPID.txt"){
8 // Open file with AliSurveyPoints for the 7 HMPID chambers
9 // Produce the corresponding alignment objects
10
11 AliSurveyObj *so = new AliSurveyObj();
12
13 Int_t size = so->GetEntries();
14 printf("-> %d\n", size);
15
16 so->FillFromLocalFile(filename);
17 size = so->GetEntries();
18 printf("--> %d\n", size);
19
20 TObjArray *points = so->GetData();
21
22 //AliCDBManager* cdbman = AliCDBManager::Instance();
23 //cdbman->SetSpecificStorage("local://$ALICE_ROOT");
24 //cdbman->SetRun(0);
25 //cdbman->Get("GRP/Align/Geometry");
26 TGeoManager::Import("geometry.root");
27
28 for (Int_t i = 0; i < points->GetEntries(); ++i)
29 {
30 AliSurveyPoint *p=(AliSurveyPoint *) points->At(i);
31 fFM[i].SetXYZ(p->GetX()*100.,p->GetY()*100.,p->GetZ()*100.);
32 }
33
34 TString chbasename("/HMPID/Chamber");
35 for(Int_t sNch=0; sNch<7; sNch++){
36 TGeoHMatrix mtx = GetResSurvAlign(sNch,oNch); //get global matrix from survey points
37
38 TString chsymname = chbasename;
39 chsymname += oNch;
40 printf("getting global matrix for the alignable volume %s\n",chsymname.Data());
41 TGeoHMatrix *gm = AliGeomManager::GetMatrix(chsymname.Data());
42
43 if(!gm){
44 printf("unable to get global matrix for the alignable volume %s\n",chsymname.Data());
45 continue;
46 }
47 TGeoHMatrix gdelta = gm->Inverse();
48 gdelta.MultiplyLeft(&mtx);
49
50 //gdelta.Print();
51
52 AliAlignObjMatrix* mobj = new
53 AliAlignObjMatrix(AliGeomManager::SymName(AliGeomManager::LayerToVolUID(AliGeomManager::kHMPID,oNch)),
54 AliGeomManager::LayerToVolUID(AliGeomManager::kHMPID,oNch),gdelta,kTRUE);
55 /*
56 cout<<"\n************* obtained AliAlignObjMatrix************\n";
57 mobj->Print();
58 cout<<""<<endl;
59
60 TGeoHMatrix pa=gdelta*g0;
61
62 pa.Print();
63 */
64 }
e4c1cb11 65}
66
67
447e91ca 68TGeoHMatrix GetResSurvAlign(Int_t survNch, Int_t& offNch)
e4c1cb11 69{
447e91ca 70 // For a given chamber identified by survey chamber number 'survNch',
71 // return the global matrix inferred from the survey points of its
72 // 4 fiducial marks and set the offline chamber number 'offNch'
73 //
74 Int_t ChSrv2Off[7] = {4,3,5,1,6,2,0};
75 //cout<<" ********* Chamber Numbers ******"<<endl;
76 //cout<<" **** Survey **** Offline *****"<<endl;
77 //for(Int_t ch=0; ch<7; ch++){
78 // cout<<" "<<ch<<" "<<ChSrv2Off[ch]<<endl;
79 //}
80
81 offNch=ChSrv2Off[survNch];
82
83 Double_t ab[3], bc[3], n[3];
84 Double_t plane[4], s;
85 Double_t ngA[3]={fFM[0+4*survNch].X(),fFM[0+4*survNch].Y(),fFM[0+4*survNch].Z()};
86 Double_t ngB[3]={fFM[1+4*survNch].X(),fFM[1+4*survNch].Y(),fFM[1+4*survNch].Z()};
87 Double_t ngC[3]={fFM[2+4*survNch].X(),fFM[2+4*survNch].Y(),fFM[2+4*survNch].Z()};
88 Double_t ngD[3]={fFM[3+4*survNch].X(),fFM[3+4*survNch].Y(),fFM[3+4*survNch].Z()};
89 if(survNch>4)
90 {
91 // first vector on the plane of the fiducial marks
92 for(Int_t i=0;i<3;i++){
93 ab[i] = ngB[i] - ngA[i];
94 }
95
96 // second vector on the plane of the fiducial marks
97 for(Int_t i=0;i<3;i++){
98 bc[i] = ngC[i] - ngB[i];
99 }
100 }
101 else{
102 // first vector on the plane of the fiducial marks
103 for(Int_t i=0;i<3;i++){
104 ab[i] = ngB[i] - ngA[i];
105 }
106
107 // second vector on the plane of the fiducial marks
108 for(Int_t i=0;i<3;i++){
109 bc[i] = ngD[i] - ngB[i];
110 }
111
112 }
113 // vector normal to the plane of the fiducial marks obtained
114 // as cross product of the two vectors on the plane d0^d1
115 n[0] = ab[1] * bc[2] - ab[2] * bc[1];
116 n[1] = ab[2] * bc[0] - ab[0] * bc[2];
117 n[2] = ab[0] * bc[1] - ab[1] * bc[0];
118
119 Double_t sizen = TMath::Sqrt( n[0]*n[0] + n[1]*n[1] + n[2]*n[2] );
120 if(sizen>1.e-8){
121 s = Double_t(1.)/sizen ; //normalization factor
122 }else{
123 return 0;
124 }
125
126 // plane expressed in the hessian normal form, see:
127 // http://mathworld.wolfram.com/HessianNormalForm.html
128 // the first three are the coordinates of the orthonormal vector
129 // the fourth coordinate is equal to the distance from the origin
130
131 for(i=0;i<3;i++){
132 plane[i] = n[i] * s;
133 }
134 plane[3] = -( plane[0] * ngA[0] + plane[1] * ngA[1] + plane[2] * ngA[2] );
135 cout<<"normal to plane and distance from IP: "<<plane[0]<<" "<<plane[1]<<" "<<plane[2]<<" "<<plane[3]<<" "<<endl;
136
137 // The center of the square with fiducial marks as corners
138 // as the middle point of one diagonal - md
139 // Used below to get the center - orig - of the surveyed box
140 Double_t orig[3], md[3];
141
142 if(survNch>4){
143 for(i=0;i<3;i++){
144 md[i] = (ngA[i] + ngC[i]) * 0.5;//modified!!!!!!!!!
145 }
146
147 }
148
149 else {
150 for(i=0;i<3;i++){
151 md[i] = (ngA[i] + ngD[i]) * 0.5;//modified!!!!!!!!!
152 }
153 }
154 cout<<endl<<"The center of the box from Survey data: "<<md[0]<<" "<<md[1]<<" "<<md[2]<<endl;
155 const Double_t zdepth=-0.9-4.85; //the fiducial marks are down the radiator (behind the honeycomb structure). They
156 //lay on 4 cylinders whose height is 9 mm.
157
158 // The center of the box
159 for(i=0;i<1;i++){
160 orig[i] = md[i] - (-plane[i])*(zdepth+plane[3]);
161 }
162 orig[1] = md[1] - (-plane[1])*(zdepth+plane[3]);
163 orig[2] = md[2] - (-plane[2])*(zdepth+plane[3]);
164
165 cout<<endl<<"The origin of the box: "<<orig[0]<<" "<<orig[1]<<" "<<orig[2]<<endl;
166
167 // get x,y local directions needed to write the global rotation matrix
168 // for the surveyed volume by normalising vectors ab and bc
169 Double_t sx = TMath::Sqrt(ab[0]*ab[0] + ab[1]*ab[1] + ab[2]*ab[2]);
170 if(sx>1.e-8){
171 for(i=0;i<3;i++){
172 ab[i] /= sx;
173 }
174 cout<<endl<<"x "<<ab[0]<<" "<<ab[1]<<" "<<ab[2]<<endl;
175 }
176 Double_t sy = TMath::Sqrt(bc[0]*bc[0] + bc[1]*bc[1] + bc[2]*bc[2]);
177 if(sy>1.e-8){
178 for(i=0;i<3;i++){
179 bc[i] /= sy;
180 }
181 cout<<endl<<"y "<<bc[0]<<" "<<bc[1]<<" "<<bc[2]<<endl;
182 }
183
184
185 // the global matrix for the surveyed volume - ng
186 Double_t rot[9] = {-ab[0],bc[0],-plane[0],-ab[1],bc[1],-plane[1],-ab[2],bc[2],-plane[2]};
187 TGeoHMatrix ng;
188 ng.SetTranslation(md);
189 ng.SetRotation(rot);
190
191 cout<<"\n********* global matrix inferred from surveyed fiducial marks for chamber"<<survNch<<"***********\n";
192 ng.Print();
193
194
195 return ng;
e4c1cb11 196
197}
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