--- /dev/null
+/**************************************************************************
+ * Copyright(c) 2007-2010, ALICE Experiment at CERN, All rights reserved. *
+ * *
+ * Author: The ALICE Off-line Project. *
+ * Contributors are mentioned in the code where appropriate. *
+ * *
+ * Permission to use, copy, modify and distribute this software and its *
+ * documentation strictly for non-commercial purposes is hereby granted *
+ * without fee, provided that the above copyright notice appears in all *
+ * copies and that both the copyright notice and this permission notice *
+ * appear in the supporting documentation. The authors make no claims *
+ * about the suitability of this software for any purpose. It is *
+ * provided "as is" without express or implied warranty. *
+ **************************************************************************/
+
+//========================================================================
+//
+// This class generates misalignment for HMPID. In particular it defines
+// the misalignment in the three canonical scenarios: "ideal", "residual"
+// and "full".
+// It is meant to be run standalone or from the steering macro
+// $ALICE_ROOT/macros/MakeAlignmentObjs.C
+// looping on the detectors.
+//
+//========================================================================
+
+#include "AliHMPIDMisAligner.h"
+#include "AliGeomManager.h"
+#include "TClonesArray.h"
+#include "TRandom.h"
+#include "TMath.h"
+#include "AliAlignObjMatrix.h"
+#include "AliLog.h"
+
+ClassImp(AliHMPIDMisAligner)
+
+//_______________________________________________________________________________________
+AliHMPIDMisAligner::AliHMPIDMisAligner() : AliMisAligner()
+{
+ //
+ // dummy constructor
+ //
+}
+
+//_______________________________________________________________________________________
+TClonesArray* AliHMPIDMisAligner::MakeAlObjsArray() {
+ // builds and returns the array of alignment objects
+ // according to the spcified misalignment scenario
+ // ("ideal", "residual" or "full").
+ //
+ if(!AliGeomManager::GetGeometry())
+ {
+ AliError("No geometry loaded into AliGeomManager! Returning null pointer!");
+ return 0;
+ }
+
+ TClonesArray *array = new TClonesArray("AliAlignObjMatrix",7);
+
+ AliGeomManager::ELayerID idHMPID = AliGeomManager::kHMPID;
+ Double_t sigmaTrans, sigmaRot;
+ Double_t dX=0., dY=0., dZ=0., dPsi=0., dTheta=0., dPhi=0.; //displacements
+
+ // TRandom *pRnd = new TRandom(4357);
+ gRandom->SetSeed(4357);
+
+ if(TString(GetMisalType())=="ideal")
+ {
+
+ for (Int_t iCh = 0; iCh < 7; iCh++) {
+ new((*array)[iCh]) AliAlignObjMatrix(AliGeomManager::SymName(idHMPID,iCh),
+ AliGeomManager::LayerToVolUID(idHMPID,iCh),dX,dY,dZ,dPsi,dTheta,dPhi,kTRUE);
+ }
+
+ }else if( TString(GetMisalType())=="residual" || TString(GetMisalType())=="full"){
+
+ sigmaTrans=0.1; // 1mm
+ sigmaRot=0.001*180/TMath::Pi(); // 1 mrad
+
+ for (Int_t iCh = 0; iCh < 7; iCh++) {
+ dX = (gRandom->Uniform()-0.5)*sigmaTrans;
+ dY = (gRandom->Uniform()-0.5)*sigmaTrans;
+ dZ = (gRandom->Uniform()-0.5)*sigmaTrans;
+ dPsi = (gRandom->Uniform()-0.5)*sigmaRot;
+ dTheta = (gRandom->Uniform()-0.5)*sigmaRot;
+ dPhi = (gRandom->Uniform()-0.5)*sigmaRot;
+ // dX = (pRnd->Uniform()-0.5)*sigmaTrans; dY = (pRnd->Uniform()-0.5)*sigmaTrans; dZ = (pRnd->Uniform()-0.5)*sigmaTrans;
+ // dPsi = (pRnd->Uniform()-0.5)*sigmaRot; dTheta = (pRnd->Uniform()-0.5)*sigmaRot; dPhi = (pRnd->Uniform()-0.5)*sigmaRot;
+ new((*array)[iCh]) AliAlignObjMatrix(AliGeomManager::SymName(idHMPID,iCh),
+ AliGeomManager::LayerToVolUID(idHMPID,iCh),dX,dY,dZ,dPsi,dTheta,dPhi,kTRUE);
+ }
+ }else{
+ AliError(Form("\"%s\" is not a valid identifier for misalignment types. Exiting ...",GetMisalType()));
+ return 0;
+ }
+
+ return array;
+}
+
+//_______________________________________________________________________________________
+AliCDBMetaData* AliHMPIDMisAligner::GetCDBMetaData() const {
+ // Returns the comment and responsible for the
+ // AliCDBMetaData to be associated with the OCDB entry
+ // containing the HMPID array of misalignment objects
+ //
+ AliCDBMetaData* md = new AliCDBMetaData();
+ md->SetResponsible("HMPID expert means nothing");
+
+ if(TString(GetMisalType())=="ideal")
+ md->SetComment("Alignment objects for HMPID ideal misalignment");
+ if(TString(GetMisalType())=="residual")
+ md->SetComment("Alignment objects for HMPID residual misalignment");
+ if(TString(GetMisalType())=="full")
+ md->SetComment("Full misalignment objects for HMPID produced with sigmaTrans=1mm and sigmaRot=1mrad");
+
+ return md;
+}