Creation of alignment object from Survey information for V0A side (Lizardo)

diff --git a/VZERO/VZEROASurveyToAlignment.C b/VZERO/VZEROASurveyToAlignment.C
new file mode 100644 (file)
index 0000000..f9b4ef7
--- /dev/null
+++ b/VZERO/VZEROASurveyToAlignment.C
@@ -0,0 +1,280 @@
+void VZEROASurveyToAlignment(){
+
+  // Macro to convert survey data into alignment data. 
+  // The position of four fiducial marks, sticked on the 
+  // entrance face of the V0A box is converted into the 
+  // global position of the box. Positions given by surveyers 
+  // are extracted from Survey Data Base. Thanks to Brigitte Cheynis
+  // for providing this macro witch just had to be modified in order 
+  // to obtain the desired results. 
+
+  if(!gGeoManager) TGeoManager::Import("geometry.root");
+
+//  TClonesArray *array = new TClonesArray("AliAlignObjMatrix",10);
+  TClonesArray *array = new TClonesArray("AliAlignObjParams",10);
+  TClonesArray &mobj = *array;
+ 
+  Double_t l_vect[3]={0.,0.,0.}; // local vector (the origin)
+  Double_t g_vect[3];            // vector corresp. to it in global RS
+  Double_t m_vect[3];            // vector corresp. to it in mother RS
+ 
+  // ************* get global matrix g3 *******************
+  //  TGeoHMatrix *g3 = AliGeomManager::GetMatrix("VZERO/V0A");
+  TGeoHMatrix *g3 = gGeoManager->GetCurrentMatrix();
+  // this is used below as the IDEAL global matrix
+
+  // ************* get local matrix l3 *******************
+  TGeoNode* n3 = gGeoManager->GetCurrentNode();
+  TGeoHMatrix *l3 = n3->GetMatrix(); 
+  
+ // point coordinates in the global RS
+  g3->LocalToMaster(l_vect,g_vect);
+  cout<<endl<<"Point coordinates in the global RS: "
+      <<g_vect[0]<<" "<<g_vect[1]<<" "<<g_vect[2];
+
+ // point coordinates in the mother volume RS
+  l3->LocalToMaster(l_vect,m_vect);
+  cout<<endl<<"Point coordinates in the mother's volume RS: \n"
+      <<m_vect[0]<<" "<<m_vect[1]<<" "<<m_vect[2]<<" "<<endl;
+
+ // Hereafter are the four ideal fiducial marks on the V0A box, 
+ // expressed in local coordinates and in cms - hard coded. 
+
+  const Double_t xside   = 22.627;
+  const Double_t yside   = 22.627;
+  const Double_t zsize   = 2.5;
+  const Double_t zoffset = 0.3;
+  
+  const Double_t zdepth  = zsize+zoffset;
+  Double_t A[3]={-xside,-yside,zdepth};
+  Double_t B[3]={xside,-yside,zdepth};
+  Double_t C[3]={xside,yside,zdepth};
+  Double_t D[3]={-xside,yside,zdepth};
+
+  TGeoTranslation* Atr = new TGeoTranslation("Atr",-xside,-yside,zdepth);
+  TGeoTranslation* Btr = new TGeoTranslation("Btr",xside,-yside,zdepth);
+  TGeoTranslation* Ctr = new TGeoTranslation("Ctr",xside,yside,zdepth);
+  TGeoTranslation* Dtr = new TGeoTranslation("Dtr",-xside,yside,zdepth);
+
+  //                    ^ local y
+  //                    |
+  //      D-------------|-------------C
+  //      |             |             |
+  //      |             |             |
+  //      |             |             |
+  //      |             |             |
+  //      |             |             |
+  //      |             |             |
+  //  ------------------|------------------> local x
+  //      |             |             |
+  //      |             |             |
+  //      |             |             |
+  //      |             |             |
+  //      |             |             |
+  //      |             |             |
+  //      A-------------|-------------B
+  //
+  // local z exiting the plane of the screen
+   
+  Double_t gA[3], gB[3], gC[3], gD[3];
+  g3->LocalToMaster(A,gA);
+  g3->LocalToMaster(B,gB);
+  g3->LocalToMaster(C,gC);
+  g3->LocalToMaster(D,gD);
+  cout<<endl<<"Ideal fiducial marks coordinates in the global RS: \n"
+      <<"A "<<gA[0]<<" "<<gA[1]<<" "<<gA[2]<<" "<<endl
+      <<"B "<<gB[0]<<" "<<gB[1]<<" "<<gB[2]<<" "<<endl
+      <<"C "<<gC[0]<<" "<<gC[1]<<" "<<gC[2]<<" "<<endl
+      <<"D "<<gD[0]<<" "<<gD[1]<<" "<<gD[2]<<" "<<endl;
+  cout<<endl;  
+    
+// Retrieval of REAL survey data from ALICE Survey Data Depot : 
+
+  AliSurveyObj *so = new AliSurveyObj();
+ 
+  so->FillFromLocalFile("Survey_943928_V0.txt");
+  Int_t size = so->GetEntries();
+
+  Printf("Title: \"%s\"", so->GetReportTitle().Data());
+  Printf("Date: \"%s\"", so->GetReportDate().Data());
+  Printf("Detector: \"%s\"", so->GetDetector().Data());
+  Printf("URL: \"%s\"", so->GetURL().Data());
+  Printf("Number: \"%d\"", so->GetReportNumber());
+  Printf("Version: \"%d\"", so->GetReportVersion());
+  Printf("Observations: \"%s\"", so->GetObservations().Data());
+  Printf("Coordinate System: \"%s\"", so->GetCoordSys().Data());
+  Printf("Measurement Units: \"%s\"", so->GetUnits().Data());
+  Printf("Nr Columns: \"%d\" \n", so->GetNrColumns());
+  
+  TObjArray *colNames = so->GetColumnNames();
+  
+  TObjArray   *points = so->GetData();
+  const char  namePoint[4]  = "6001";
+  Double_t    coordinates[4][3];
+//  Printf("  ******* %c ******* \n\n ", namePoint[0]); 
+  Printf("Relevant points to be used for alignment procedure (in mm):"); 
+  for (Int_t i = 0; i < points->GetEntries(); ++i) {
+    if(((AliSurveyPoint *) points->At(i))->GetPointName()[0] == namePoint[0]) {
+           Printf("Point %d --> \"%s\" %f %f %f ", i, 
+           ((AliSurveyPoint *) points->At(i))->GetPointName().Data(),
+          ((AliSurveyPoint *) points->At(i))->GetX(),
+          ((AliSurveyPoint *) points->At(i))->GetY(),
+          ((AliSurveyPoint *) points->At(i))->GetZ() ); 
+          if(i > 17){
+          coordinates[i-18][0]  = (AliSurveyPoint *) points->At(i))->GetX();
+          coordinates[i-18][1]  = (AliSurveyPoint *) points->At(i))->GetY();
+          coordinates[i-18][2]  = (AliSurveyPoint *) points->At(i))->GetZ(); } 
+     }
+  }   
+    
+   Double_t ngA[3], ngB[3], ngC[3], ngD[3];
+
+   for(Int_t i=0; i<3; i++) 
+     { ngA[i]  = coordinates[0][i] / 10.0 ; 
+       ngD[i]  = coordinates[1][i] / 10.0 ;
+       ngB[i]  = coordinates[2][i] / 10.0 ; 
+       ngC[i]  = coordinates[3][i] / 10.0 ; }
+          
+   cout<<endl<<"Fiducial marks coordinates in the global RS given by surveyers: \n"
+       <<"A "<<ngA[0]<<" "<<ngA[1]<<" "<<ngA[2]<<" "<<endl
+       <<"B "<<ngB[0]<<" "<<ngB[1]<<" "<<ngB[2]<<" "<<endl
+       <<"C "<<ngC[0]<<" "<<ngC[1]<<" "<<ngC[2]<<" "<<endl
+       <<"D "<<ngD[0]<<" "<<ngD[1]<<" "<<ngD[2]<<" "<<endl;
+    
+  // From the new fiducial marks coordinates derive back the new global position
+  // of the surveyed volume
+  //*** What follows is the actual survey-to-alignment procedure which assumes,
+  //*** as is the case of the present example, 4 fiducial marks
+  //*** at the corners of a square lying on a plane parallel to a surface
+  //*** of the surveyed box at a certain offset and with
+  //*** x and y sides parallel to the box's x and y axes.
+  //*** If the code below is placed in a separate class or method, it needs
+  //*** as input the four points and the offset from the origin (zdepth)
+  //*** The algorithm can be easily modified for different placement
+  //*** and/or cardinality of the fiducial marks.
+  
+  Double_t ab[3], bc[3], n[3];
+  Double_t plane[4], s;
+
+  // first vector on the plane of the fiducial marks
+  for(i=0;i<3;i++){
+    ab[i] = ngB[i] - ngA[i];
+  }
+
+  // second vector on the plane of the fiducial marks
+  for(i=0;i<3;i++){
+    bc[i] = ngC[i] - ngB[i];
+  }
+
+  // vector normal to the plane of the fiducial marks obtained
+  // as cross product of the two vectors on the plane d0^d1
+  n[0] = ab[1] * bc[2] - ab[2] * bc[1];
+  n[1] = ab[2] * bc[0] - ab[0] * bc[2];
+  n[2] = ab[0] * bc[1] - ab[1] * bc[0];
+
+  Double_t sizen = TMath::Sqrt( n[0]*n[0] + n[1]*n[1] + n[2]*n[2] );
+  if(sizen>1.e-8){
+          s = Double_t(1.)/sizen ; //normalization factor
+  }else{
+          return 0;
+  }
+
+  // plane expressed in the hessian normal form, see:
+  // http://mathworld.wolfram.com/HessianNormalForm.html
+  // the first three are the coordinates of the orthonormal vector
+  // the fourth coordinate is equal to the distance from the origin
+  for(i=0;i<3;i++){
+    plane[i] = n[i] * s;
+  }
+  plane[3] = -( plane[0] * ngA[0] + plane[1] * ngA[1] + plane[2] * ngA[2] );
+//  cout<<plane[0]<<"  "<<plane[1]<<"  "<<plane[2]<<"  "<<plane[3]<<"  "<<endl;
+
+  // The center of the square with fiducial marks as corners
+  // as the middle point of one diagonal - md
+  // Used below to get the center - orig - of the surveyed box
+  
+  Double_t orig[3], md[3];
+  for(i=0;i<3;i++){
+    md[i] = (ngA[i] + ngC[i]) * 0.5;
+  }
+
+  //  center of the box
+  for(i=0;i<3;i++){
+    orig[i] = md[i] - plane[i]*zdepth;
+  }
+
+  cout<<endl<<"Center of the box: "<<orig[0]<<"  "<<orig[1]<<"  "<<orig[2]<<endl;
+
+  // get x,y local directions needed to write the global rotation matrix
+  // for the surveyed volume by normalising vectors ab and bc
+  
+  Double_t sx = TMath::Sqrt(ab[0]*ab[0] + ab[1]*ab[1] + ab[2]*ab[2]);
+  if(sx>1.e-8){
+     for(i=0;i<3;i++){
+          ab[i] /= sx;
+     }
+     cout<<"x direction "<<ab[0]<<"  "<<ab[1]<<"  "<<ab[2]<<endl;
+  }
+  Double_t sy = TMath::Sqrt(bc[0]*bc[0] + bc[1]*bc[1] + bc[2]*bc[2]);
+  if(sy>1.e-8){
+    for(i=0;i<3;i++){
+          bc[i] /= sy;
+    }
+    cout<<"y direction "<<bc[0]<<"  "<<bc[1]<<"  "<<bc[2]<<endl;
+  }
+
+  // the global matrix for the surveyed volume - ng
+  Double_t rot[9] = {ab[0],bc[0],plane[0],ab[1],bc[1],plane[1],ab[2],bc[2],plane[2]};
+  TGeoHMatrix ng;
+  ng.SetTranslation(orig);
+  ng.SetRotation(rot);
+
+//  cout<<"\n********* global matrix inferred from surveyed fiducial marks ***********\n";
+//  ng.Print();
+
+ // To produce the alignment object for the given volume you would
+ // then do something like this:
+ // Calculate the global delta transformation as ng * g3^-1
+ 
+ TGeoHMatrix gdelta = g3->Inverse(); //now equal to the inverse of g3
+ gdelta.MultiplyLeft(&ng);
+ Int_t index = 0;
+ 
+ // if the volume is in the look-up table use something like this instead:
+ // AliGeomManager::LayerToVolUID(AliGeomManager::kTOF,i); 
+ 
+ //AliAlignObjMatrix* mobj[0] = new AliAlignObjMatrix("VZERO/V0A",index,gdelta,kTRUE);
+ //  new(mobj[0]) AliAlignObjMatrix("VZERO/V0C",index,gdelta,kTRUE);
+
+  new(mobj[0]) AliAlignObjParams("VZERO/V0A",index,gdelta,kTRUE);
+  
+  if(!gSystem->Getenv("$TOCDB")){
+    // save on file
+     TFile f("V0ASurvey.root","RECREATE");
+     if(!f) cerr<<"cannot open file for output\n";
+     f.cd();
+     f.WriteObject(array,"V0ASurveyObjs ","kSingleKey");
+     f.Close();
+  }else{
+    // save in CDB storage
+     AliCDBManager* cdb = AliCDBManager::Instance();
+     AliCDBStorage* storage = cdb->GetStorage("local://$ALICE_ROOT");
+     AliCDBMetaData* mda = new AliCDBMetaData();
+     mda->SetResponsible("Lizardo Valencia");
+     mda->SetComment("Alignment objects for V0A survey");
+     mda->SetAliRootVersion(gSystem->Getenv("$ARVERSION"));
+     AliCDBId id("VZERO/Align/Data",0,9999999);
+     storage->Put(array,id,mda);
+  }
+  
+  cout<<"\n********* Alignment constants contained in alignment object ***********\n";
+  cout<<"*************** deduced from surveyed fiducial marks : ****************\n";
+  array->Print();
+  
+  AliAlignObjParams* itsalobj = (AliAlignObjParams*) mobj.UncheckedAt(0);
+  itsalobj->ApplyToGeometry(); 
+  
+  array->Delete();
+
+}
+