[u/mrichter/AliRoot.git] / MUON / AliMUONGeometryMisAligner.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *      SigmaEffect_thetadegrees                                          * 
 * 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 purpeateose. It is      *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

// $Id$
//
//-----------------------------------------------------------------------------
/// \class AliMUONGeometryMisAligner
///
/// This performs the misalignment on an existing muon arm geometry
/// based on the standard definition of the detector elements in 
/// $ALICE_ROOT/MUON/data
///
/// --> User has to specify the magnitude of the alignments, in the Cartesian 
/// co-ordiantes (which are used to apply translation misalignments) and in the
/// spherical co-ordinates (which are used to apply angular displacements)
///
/// --> If the constructor is used with no arguments, user has to set 
/// misalignment ranges by hand using the methods : 
/// SetApplyMisAlig, SetMaxCartMisAlig, SetMaxAngMisAlig, SetXYAngMisAligFactor
/// (last method takes account of the fact that the misalingment is greatest in 
/// the XY plane, since the detection elements are fixed to a support structure
/// in this plane. Misalignments in the XZ and YZ plane will be very small 
/// compared to those in the XY plane, which are small already - of the order 
/// of microns)
///
/// Note : If the detection elements are allowed to be misaligned in all
/// directions, this has consequences for the alignment algorithm
/// (AliMUONAlignment), which needs to know the number of free parameters. 
/// Eric only allowed 3 :  x,y,theta_xy, but in principle z and the other 
/// two angles are alignable as well.
///
/// \author Bruce Becker, Javier Castillo
//-----------------------------------------------------------------------------

#include "AliMUONGeometryMisAligner.h"
#include "AliMUONGeometryTransformer.h"
#include "AliMUONGeometryModuleTransformer.h"
#include "AliMUONGeometryDetElement.h"
#include "AliMUONGeometryBuilder.h"

#include "AliMpExMap.h"
#include "AliMpExMapIterator.h"

#include "AliLog.h"

#include <TGeoMatrix.h>
#include <TMath.h>
#include <TRandom.h>
#include <Riostream.h>

/// \cond CLASSIMP
ClassImp(AliMUONGeometryMisAligner)
/// \endcond

//______________________________________________________________________________
AliMUONGeometryMisAligner::AliMUONGeometryMisAligner(Double_t cartXMisAligM, Double_t cartXMisAligW, Double_t cartYMisAligM, Double_t cartYMisAligW, Double_t angMisAligM, Double_t angMisAligW)
  : TObject(),
    fUseUni(kFALSE),
    fUseGaus(kTRUE),
    fXYAngMisAligFactor(0.0),
    fZCartMisAligFactor(0.0),
    fDisplacementGenerator(0)
{
  /// Standard constructor
  for (Int_t i=0; i<6; i++){
    for (Int_t j=0; j<2; j++){
      fDetElemMisAlig[i][j] = 0.0;
      fModuleMisAlig[i][j] = 0.0;
    }
  }
  fDetElemMisAlig[0][0] = cartXMisAligM; 
  fDetElemMisAlig[0][1] = cartXMisAligW; 
  fDetElemMisAlig[1][0] = cartYMisAligM; 
  fDetElemMisAlig[1][1] = cartYMisAligW; 
  fDetElemMisAlig[5][0] = angMisAligM; 
  fDetElemMisAlig[5][1] = angMisAligW;

  fDisplacementGenerator = new TRandom(0);
}

//______________________________________________________________________________
AliMUONGeometryMisAligner::AliMUONGeometryMisAligner(Double_t cartMisAligM, Double_t cartMisAligW, Double_t angMisAligM, Double_t angMisAligW)
  : TObject(), 
    fUseUni(kFALSE),
    fUseGaus(kTRUE),
    fXYAngMisAligFactor(0.0),
    fZCartMisAligFactor(0.0),
    fDisplacementGenerator(0)
{
  /// Standard constructor
  for (Int_t i=0; i<6; i++){
    for (Int_t j=0; j<2; j++){
      fDetElemMisAlig[i][j] = 0.0;
      fModuleMisAlig[i][j] = 0.0;
    }
  }
  fDetElemMisAlig[0][0] = cartMisAligM; 
  fDetElemMisAlig[0][1] = cartMisAligW; 
  fDetElemMisAlig[1][0] = cartMisAligM; 
  fDetElemMisAlig[1][1] = cartMisAligW; 
  fDetElemMisAlig[5][0] = angMisAligM; 
  fDetElemMisAlig[5][1] = angMisAligW;

  fDisplacementGenerator = new TRandom(0);
}

//______________________________________________________________________________
AliMUONGeometryMisAligner::AliMUONGeometryMisAligner(Double_t cartMisAlig, Double_t angMisAlig)
  : TObject(), 
    fUseUni(kTRUE),
    fUseGaus(kFALSE),
    fXYAngMisAligFactor(0.0),
    fZCartMisAligFactor(0.0),
    fDisplacementGenerator(0)
{
  /// Standard constructor
  for (Int_t i=0; i<6; i++){
    for (Int_t j=0; j<2; j++){
      fDetElemMisAlig[i][j] = 0.0;
      fModuleMisAlig[i][j] = 0.0;
    }
  }
  fDetElemMisAlig[0][1] = cartMisAlig; 
  fDetElemMisAlig[1][1] = cartMisAlig; 
  fDetElemMisAlig[5][1] = angMisAlig;

  fDisplacementGenerator = new TRandom(0);
}

//_____________________________________________________________________________
AliMUONGeometryMisAligner::AliMUONGeometryMisAligner()
  : TObject(), 
    fUseUni(kTRUE),
    fUseGaus(kFALSE),
    fXYAngMisAligFactor(0.0),
    fZCartMisAligFactor(0.0),
    fDisplacementGenerator(0)
{
  /// Default constructor
  for (Int_t i=0; i<6; i++){
    for (Int_t j=0; j<2; j++){
      fDetElemMisAlig[i][j] = 0.0;
      fModuleMisAlig[i][j] = 0.0;
    }
  }
}

//______________________________________________________________________________
AliMUONGeometryMisAligner::~AliMUONGeometryMisAligner()
{
/// Destructor

  if (fDisplacementGenerator) delete fDisplacementGenerator;
}

//_________________________________________________________________________
void
AliMUONGeometryMisAligner::SetXYAngMisAligFactor(Double_t factor)
{
  /// Set XY angular misalign factor 

  if (TMath::Abs(factor) > 1.0 && factor > 0.){
    fXYAngMisAligFactor = factor;
    fDetElemMisAlig[3][0] = fDetElemMisAlig[5][0]*factor; // These lines were 
    fDetElemMisAlig[3][1] = fDetElemMisAlig[5][1]*factor; // added to keep
    fDetElemMisAlig[4][0] = fDetElemMisAlig[5][0]*factor; // backward 
    fDetElemMisAlig[4][1] = fDetElemMisAlig[5][1]*factor; // compatibility 
  }
  else
    AliError(Form("Invalid XY angular misalign factor, %d", factor));
}

//_________________________________________________________________________
void AliMUONGeometryMisAligner::SetZCartMisAligFactor(Double_t factor) 
{
  /// Set XY angular misalign factor 
  if (TMath::Abs(factor)<1.0 && factor>0.) {
    fZCartMisAligFactor = factor;
    fDetElemMisAlig[2][0] = fDetElemMisAlig[0][0];        // These lines were added to 
    fDetElemMisAlig[2][1] = fDetElemMisAlig[0][1]*factor; // keep backward compatibility
  }
  else
    AliError(Form("Invalid Z cartesian misalign factor, %d", factor));
}

//_________________________________________________________________________
void AliMUONGeometryMisAligner::GetUniMisAlign(Double_t cartMisAlig[3], Double_t angMisAlig[3], const Double_t lParMisAlig[6][2]) const
{
  /// Misalign using uniform distribution
  /**
    misalign the centre of the local transformation
    rotation axes : 
    fAngMisAlig[1,2,3] = [x,y,z]
    Assume that misalignment about the x and y axes (misalignment of z plane)
    is much smaller, since the entire detection plane has to be moved (the 
    detection elements are on a support structure), while rotation of the x-y
    plane is more free.
  */
  cartMisAlig[0] = fDisplacementGenerator->Uniform(-lParMisAlig[0][1]+lParMisAlig[0][0], lParMisAlig[0][0]+lParMisAlig[0][1]);
  cartMisAlig[1] = fDisplacementGenerator->Uniform(-lParMisAlig[1][1]+lParMisAlig[1][0], lParMisAlig[1][0]+lParMisAlig[1][1]);
  cartMisAlig[2] = fDisplacementGenerator->Uniform(-lParMisAlig[2][1]+lParMisAlig[2][0], lParMisAlig[2][0]+lParMisAlig[2][1]);  
 
  angMisAlig[0] = fDisplacementGenerator->Uniform(-lParMisAlig[3][1]+lParMisAlig[3][0], lParMisAlig[3][0]+lParMisAlig[3][1]);
  angMisAlig[1] = fDisplacementGenerator->Uniform(-lParMisAlig[4][1]+lParMisAlig[4][0], lParMisAlig[4][0]+lParMisAlig[4][1]);
  angMisAlig[2] = fDisplacementGenerator->Uniform(-lParMisAlig[5][1]+lParMisAlig[5][0], lParMisAlig[5][0]+lParMisAlig[5][1]);	// degrees
}

//_________________________________________________________________________
void AliMUONGeometryMisAligner::GetGausMisAlign(Double_t cartMisAlig[3], Double_t angMisAlig[3], const Double_t lParMisAlig[6][2]) const
{
  /// Misalign using gaussian distribution
  /**
    misalign the centre of the local transformation
    rotation axes : 
    fAngMisAlig[1,2,3] = [x,y,z]
    Assume that misalignment about the x and y axes (misalignment of z plane)
    is much smaller, since the entire detection plane has to be moved (the 
    detection elements are on a support structure), while rotation of the x-y
    plane is more free.
  */
  cartMisAlig[0] = fDisplacementGenerator->Gaus(lParMisAlig[0][0], lParMisAlig[0][1]);
  cartMisAlig[1] = fDisplacementGenerator->Gaus(lParMisAlig[1][0], lParMisAlig[1][1]);
  cartMisAlig[2] = fDisplacementGenerator->Gaus(lParMisAlig[2][0], lParMisAlig[2][1]);
 
  angMisAlig[0] = fDisplacementGenerator->Gaus(lParMisAlig[3][0], lParMisAlig[3][1]);
  angMisAlig[1] = fDisplacementGenerator->Gaus(lParMisAlig[4][0], lParMisAlig[4][1]);
  angMisAlig[2] = fDisplacementGenerator->Gaus(lParMisAlig[5][0], lParMisAlig[5][1]);	// degrees
}

//_________________________________________________________________________
TGeoCombiTrans AliMUONGeometryMisAligner::MisAlignDetElem(const TGeoCombiTrans & transform) const
{
  /// Misalign given transformation and return the misaligned transformation. 
  /// Use misalignment parameters for detection elements.
  /// Note that applied misalignments are small deltas with respect to the detection 
  /// element own ideal local reference frame. Thus deltaTransf represents 
  /// the transformation to go from the misaligned d.e. local coordinates to the 
  /// ideal d.e. local coordinates. 
  /// Also note that this -is not- what is in the ALICE alignment framework known 
  /// as local nor global (see AliMUONGeometryMisAligner::MisAlign) 
  
  Double_t cartMisAlig[3] = {0,0,0};
  Double_t angMisAlig[3] = {0,0,0};

  if (fUseUni) { 
    GetUniMisAlign(cartMisAlig,angMisAlig,fDetElemMisAlig);
  }
  else { 
    if (!fUseGaus) {
      AliWarning("Neither uniform nor gausian distribution is set! Will use gausian...");
    } 
    GetGausMisAlign(cartMisAlig,angMisAlig,fDetElemMisAlig);
  }

  TGeoTranslation deltaTrans(cartMisAlig[0], cartMisAlig[1], cartMisAlig[2]);
  TGeoRotation deltaRot;
  deltaRot.RotateX(angMisAlig[0]);
  deltaRot.RotateY(angMisAlig[1]);
  deltaRot.RotateZ(angMisAlig[2]);

  TGeoCombiTrans deltaTransf(deltaTrans,deltaRot);
  TGeoHMatrix newTransfMat = transform * deltaTransf;
    
  AliInfo(Form("Rotated DE by %f about Z axis.", angMisAlig[2]));

  return TGeoCombiTrans(newTransfMat);
}

//_________________________________________________________________________
TGeoCombiTrans AliMUONGeometryMisAligner::MisAlignModule(const TGeoCombiTrans & transform) const
{
  /// Misalign given transformation and return the misaligned transformation. 
  /// Use misalignment parameters for modules.
  /// Note that applied misalignments are small deltas with respect to the module 
  /// own ideal local reference frame. Thus deltaTransf represents 
  /// the transformation to go from the misaligned module local coordinates to the 
  /// ideal module local coordinates. 
  /// Also note that this -is not- what is in the ALICE alignment framework known 
  /// as local nor global (see AliMUONGeometryMisAligner::MisAlign) 
  
  Double_t cartMisAlig[3] = {0,0,0};
  Double_t angMisAlig[3] = {0,0,0};

  if (fUseUni) { 
    GetUniMisAlign(cartMisAlig,angMisAlig,fModuleMisAlig);
  }
  else { 
    if (!fUseGaus) {
      AliWarning("Neither uniform nor gausian distribution is set! Will use gausian...");
    } 
    GetGausMisAlign(cartMisAlig,angMisAlig,fModuleMisAlig);
  }

  TGeoTranslation deltaTrans(cartMisAlig[0], cartMisAlig[1], cartMisAlig[2]);
  TGeoRotation deltaRot;
  deltaRot.RotateX(angMisAlig[0]);
  deltaRot.RotateY(angMisAlig[1]);
  deltaRot.RotateZ(angMisAlig[2]);

  TGeoCombiTrans deltaTransf(deltaTrans,deltaRot);
  TGeoHMatrix newTransfMat = transform * deltaTransf;

  AliInfo(Form("Rotated Module by %f about Z axis.", angMisAlig[2]));

  return TGeoCombiTrans(newTransfMat);
}

//______________________________________________________________________
AliMUONGeometryTransformer *
AliMUONGeometryMisAligner::MisAlign(const AliMUONGeometryTransformer *
				    transformer, Bool_t verbose)
{
  /// Takes the internal geometry module transformers, copies them to
  /// new geometry module transformers. 
  /// Calculates  module misalignment parameters and applies these
  /// to the new module transformer.
  /// Calculates the module misalignment delta transformation in the 
  /// Alice Alignment Framework newTransf = delta * oldTransf.
  /// Add a module misalignment to the new geometry transformer.
  /// Gets the Detection Elements from the module transformer. 
  /// Calculates misalignment parameters and applies these
  /// to the local transformation of the Detection Element.
  /// Obtains the new global transformation by multiplying the new 
  /// module transformer transformation with the new local transformation. 
  /// Applies the new global transform to a new detection element.
  /// Adds the new detection element to a new module transformer.
  /// Calculates the d.e. misalignment delta transformation in the 
  /// Alice Alignment Framework (newGlobalTransf = delta * oldGlobalTransf).
  /// Add a d.e. misalignment to the new geometry transformer.
  /// Adds the new module transformer to a new geometry transformer.
  /// Returns the new geometry transformer.


  AliMUONGeometryTransformer *newGeometryTransformer =
    new AliMUONGeometryTransformer();
  for (Int_t iMt = 0; iMt < transformer->GetNofModuleTransformers(); iMt++)
    {				// module transformers
      const AliMUONGeometryModuleTransformer *kModuleTransformer =
	transformer->GetModuleTransformer(iMt, true);
      
      AliMUONGeometryModuleTransformer *newModuleTransformer =
	new AliMUONGeometryModuleTransformer(iMt);
      newGeometryTransformer->AddModuleTransformer(newModuleTransformer);

      TGeoCombiTrans moduleTransform =
	TGeoCombiTrans(*kModuleTransformer->GetTransformation());
      // New module transformation
      TGeoCombiTrans newModuleTransform = MisAlignModule(moduleTransform);
      newModuleTransformer->SetTransformation(newModuleTransform);

      // Get delta transformation: 
      // Tdelta = Tnew * Told.inverse
      TGeoHMatrix deltaModuleTransform = 
	AliMUONGeometryBuilder::Multiply(
	  newModuleTransform, 
	  kModuleTransformer->GetTransformation()->Inverse());

      // Create module mis alignment matrix
      newGeometryTransformer
	->AddMisAlignModule(kModuleTransformer->GetModuleId(), deltaModuleTransform);

      AliMpExMap *detElements = kModuleTransformer->GetDetElementStore();

      if (verbose)
	AliInfo(Form("%i DEs in old GeometryStore  %i",detElements->GetSize(), iMt));

      TIter next(detElements->CreateIterator());
      AliMUONGeometryDetElement *detElement;
      
      while ( ( detElement = static_cast<AliMUONGeometryDetElement*>(next()) ) )
      {
	  /// make a new detection element
	  AliMUONGeometryDetElement *newDetElement =
	    new AliMUONGeometryDetElement(detElement->GetId(),
					  detElement->GetVolumePath());

	  // local transformation of this detection element.
          TGeoCombiTrans localTransform
	    = TGeoCombiTrans(*detElement->GetLocalTransformation());
	  TGeoCombiTrans newLocalTransform = MisAlignDetElem(localTransform);
          newDetElement->SetLocalTransformation(newLocalTransform);


	  // global transformation
	  TGeoHMatrix newGlobalTransform =
	    AliMUONGeometryBuilder::Multiply(newModuleTransform,
					     newLocalTransform);
	  newDetElement->SetGlobalTransformation(newGlobalTransform);
	  
	  // add this det element to module
	  newModuleTransformer->GetDetElementStore()->Add(newDetElement->GetId(),
							  newDetElement);

	  // In the Alice Alignment Framework misalignment objects store
	  // global delta transformation
	  // Get detection "intermediate" global transformation
	  TGeoHMatrix newOldGlobalTransform = newModuleTransform * localTransform;
          // Get detection element global delta transformation: 
	  // Tdelta = Tnew * Told.inverse
	  TGeoHMatrix  deltaGlobalTransform
	    = AliMUONGeometryBuilder::Multiply(
	        newGlobalTransform, 
		newOldGlobalTransform.Inverse());
	  
	  // Create mis alignment matrix
	  newGeometryTransformer
	    ->AddMisAlignDetElement(detElement->GetId(), deltaGlobalTransform);
	}

      
      if (verbose)
	AliInfo(Form("Added module transformer %i to the transformer", iMt));
      newGeometryTransformer->AddModuleTransformer(newModuleTransformer);
    }
  return newGeometryTransformer;
}
Commit	Line	Data
21dd83fc	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* SigmaEffect_thetadegrees *
	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 purpeateose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	// $Id$
	17	//
3d1463c8	18	//-----------------------------------------------------------------------------
a9aad96e	19	/// \class AliMUONGeometryMisAligner
	20	///
	21	/// This performs the misalignment on an existing muon arm geometry
	22	/// based on the standard definition of the detector elements in
	23	/// $ALICE_ROOT/MUON/data
	24	///
	25	/// --> User has to specify the magnitude of the alignments, in the Cartesian
	26	/// co-ordiantes (which are used to apply translation misalignments) and in the
	27	/// spherical co-ordinates (which are used to apply angular displacements)
	28	///
	29	/// --> If the constructor is used with no arguments, user has to set
	30	/// misalignment ranges by hand using the methods :
	31	/// SetApplyMisAlig, SetMaxCartMisAlig, SetMaxAngMisAlig, SetXYAngMisAligFactor
	32	/// (last method takes account of the fact that the misalingment is greatest in
	33	/// the XY plane, since the detection elements are fixed to a support structure
	34	/// in this plane. Misalignments in the XZ and YZ plane will be very small
	35	/// compared to those in the XY plane, which are small already - of the order
	36	/// of microns)
	37	///
	38	/// Note : If the detection elements are allowed to be misaligned in all
	39	/// directions, this has consequences for the alignment algorithm
	40	/// (AliMUONAlignment), which needs to know the number of free parameters.
	41	/// Eric only allowed 3 : x,y,theta_xy, but in principle z and the other
	42	/// two angles are alignable as well.
	43	///
4600314b	44	/// \author Bruce Becker, Javier Castillo
3d1463c8	45	//-----------------------------------------------------------------------------
21dd83fc	46
21dd83fc	47	#include "AliMUONGeometryMisAligner.h"
	48	#include "AliMUONGeometryTransformer.h"
	49	#include "AliMUONGeometryModuleTransformer.h"
	50	#include "AliMUONGeometryDetElement.h"
21dd83fc	51	#include "AliMUONGeometryBuilder.h"
ef79ed3a	52
8c95578a	53	#include "AliMpExMap.h"
630711ed	54	#include "AliMpExMapIterator.h"
8c95578a	55
ef79ed3a	56	#include "AliLog.h"
ef79ed3a	57
328e160e	58	#include <TGeoMatrix.h>
21dd83fc	59	#include <TMath.h>
21dd83fc	60	#include <TRandom.h>
ef4cb4f1	61	#include <Riostream.h>
21dd83fc	62
a9aad96e	63	/// \cond CLASSIMP
21dd83fc	64	ClassImp(AliMUONGeometryMisAligner)
a9aad96e	65	/// \endcond
a9aad96e	66
328e160e	67	//______________________________________________________________________________
328e160e	68	AliMUONGeometryMisAligner::AliMUONGeometryMisAligner(Double_t cartXMisAligM, Double_t cartXMisAligW, Double_t cartYMisAligM, Double_t cartYMisAligW, Double_t angMisAligM, Double_t angMisAligW)
8395bff1	69	: TObject(),
	70	fUseUni(kFALSE),
	71	fUseGaus(kTRUE),
8395bff1	72	fXYAngMisAligFactor(0.0),
	73	fZCartMisAligFactor(0.0),
	74	fDisplacementGenerator(0)
328e160e	75	{
328e160e	76	/// Standard constructor
4600314b	77	for (Int_t i=0; i<6; i++){
	78	for (Int_t j=0; j<2; j++){
	79	fDetElemMisAlig[i][j] = 0.0;
	80	fModuleMisAlig[i][j] = 0.0;
	81	}
	82	}
	83	fDetElemMisAlig[0][0] = cartXMisAligM;
	84	fDetElemMisAlig[0][1] = cartXMisAligW;
	85	fDetElemMisAlig[1][0] = cartYMisAligM;
	86	fDetElemMisAlig[1][1] = cartYMisAligW;
	87	fDetElemMisAlig[5][0] = angMisAligM;
	88	fDetElemMisAlig[5][1] = angMisAligW;
	89
328e160e	90	fDisplacementGenerator = new TRandom(0);
328e160e	91	}
	92
	93	//______________________________________________________________________________
	94	AliMUONGeometryMisAligner::AliMUONGeometryMisAligner(Double_t cartMisAligM, Double_t cartMisAligW, Double_t angMisAligM, Double_t angMisAligW)
8395bff1	95	: TObject(),
	96	fUseUni(kFALSE),
	97	fUseGaus(kTRUE),
8395bff1	98	fXYAngMisAligFactor(0.0),
	99	fZCartMisAligFactor(0.0),
	100	fDisplacementGenerator(0)
328e160e	101	{
328e160e	102	/// Standard constructor
4600314b	103	for (Int_t i=0; i<6; i++){
	104	for (Int_t j=0; j<2; j++){
	105	fDetElemMisAlig[i][j] = 0.0;
	106	fModuleMisAlig[i][j] = 0.0;
	107	}
	108	}
	109	fDetElemMisAlig[0][0] = cartMisAligM;
	110	fDetElemMisAlig[0][1] = cartMisAligW;
	111	fDetElemMisAlig[1][0] = cartMisAligM;
	112	fDetElemMisAlig[1][1] = cartMisAligW;
	113	fDetElemMisAlig[5][0] = angMisAligM;
	114	fDetElemMisAlig[5][1] = angMisAligW;
	115
328e160e	116	fDisplacementGenerator = new TRandom(0);
328e160e	117	}
328e160e	118
21dd83fc	119	//______________________________________________________________________________
21dd83fc	120	AliMUONGeometryMisAligner::AliMUONGeometryMisAligner(Double_t cartMisAlig, Double_t angMisAlig)
8395bff1	121	: TObject(),
	122	fUseUni(kTRUE),
	123	fUseGaus(kFALSE),
8395bff1	124	fXYAngMisAligFactor(0.0),
	125	fZCartMisAligFactor(0.0),
	126	fDisplacementGenerator(0)
21dd83fc	127	{
21dd83fc	128	/// Standard constructor
4600314b	129	for (Int_t i=0; i<6; i++){
	130	for (Int_t j=0; j<2; j++){
	131	fDetElemMisAlig[i][j] = 0.0;
	132	fModuleMisAlig[i][j] = 0.0;
	133	}
	134	}
	135	fDetElemMisAlig[0][1] = cartMisAlig;
	136	fDetElemMisAlig[1][1] = cartMisAlig;
	137	fDetElemMisAlig[5][1] = angMisAlig;
	138
21dd83fc	139	fDisplacementGenerator = new TRandom(0);
	140	}
	141
	142	//_____________________________________________________________________________
	143	AliMUONGeometryMisAligner::AliMUONGeometryMisAligner()
8395bff1	144	: TObject(),
	145	fUseUni(kTRUE),
	146	fUseGaus(kFALSE),
8395bff1	147	fXYAngMisAligFactor(0.0),
	148	fZCartMisAligFactor(0.0),
	149	fDisplacementGenerator(0)
21dd83fc	150	{
8395bff1	151	/// Default constructor
4600314b	152	for (Int_t i=0; i<6; i++){
	153	for (Int_t j=0; j<2; j++){
	154	fDetElemMisAlig[i][j] = 0.0;
	155	fModuleMisAlig[i][j] = 0.0;
	156	}
	157	}
21dd83fc	158	}
21dd83fc	159
21dd83fc	160	//______________________________________________________________________________
	161	AliMUONGeometryMisAligner::~AliMUONGeometryMisAligner()
	162	{
	163	/// Destructor
	164
8395bff1	165	if (fDisplacementGenerator) delete fDisplacementGenerator;
21dd83fc	166	}
21dd83fc	167
490da820	168	//_________________________________________________________________________
21dd83fc	169	void
	170	AliMUONGeometryMisAligner::SetXYAngMisAligFactor(Double_t factor)
	171	{
328e160e	172	/// Set XY angular misalign factor
490da820	173
4600314b	174	if (TMath::Abs(factor) > 1.0 && factor > 0.){
21dd83fc	175	fXYAngMisAligFactor = factor;
4600314b	176	fDetElemMisAlig[3][0] = fDetElemMisAlig[5][0]*factor; // These lines were
	177	fDetElemMisAlig[3][1] = fDetElemMisAlig[5][1]*factor; // added to keep
	178	fDetElemMisAlig[4][0] = fDetElemMisAlig[5][0]*factor; // backward
	179	fDetElemMisAlig[4][1] = fDetElemMisAlig[5][1]*factor; // compatibility
	180	}
21dd83fc	181	else
328e160e	182	AliError(Form("Invalid XY angular misalign factor, %d", factor));
	183	}
	184
	185	//_________________________________________________________________________
	186	void AliMUONGeometryMisAligner::SetZCartMisAligFactor(Double_t factor)
	187	{
	188	/// Set XY angular misalign factor
4600314b	189	if (TMath::Abs(factor)<1.0 && factor>0.) {
328e160e	190	fZCartMisAligFactor = factor;
4600314b	191	fDetElemMisAlig[2][0] = fDetElemMisAlig[0][0]; // These lines were added to
	192	fDetElemMisAlig[2][1] = fDetElemMisAlig[0][1]*factor; // keep backward compatibility
	193	}
328e160e	194	else
	195	AliError(Form("Invalid Z cartesian misalign factor, %d", factor));
	196	}
	197
	198	//_________________________________________________________________________
4600314b	199	void AliMUONGeometryMisAligner::GetUniMisAlign(Double_t cartMisAlig[3], Double_t angMisAlig[3], const Double_t lParMisAlig[6][2]) const
328e160e	200	{
328e160e	201	/// Misalign using uniform distribution
a9aad96e	202	/**
328e160e	203	misalign the centre of the local transformation
	204	rotation axes :
	205	fAngMisAlig[1,2,3] = [x,y,z]
	206	Assume that misalignment about the x and y axes (misalignment of z plane)
	207	is much smaller, since the entire detection plane has to be moved (the
	208	detection elements are on a support structure), while rotation of the x-y
	209	plane is more free.
	210	*/
4600314b	211	cartMisAlig[0] = fDisplacementGenerator->Uniform(-lParMisAlig[0][1]+lParMisAlig[0][0], lParMisAlig[0][0]+lParMisAlig[0][1]);
	212	cartMisAlig[1] = fDisplacementGenerator->Uniform(-lParMisAlig[1][1]+lParMisAlig[1][0], lParMisAlig[1][0]+lParMisAlig[1][1]);
	213	cartMisAlig[2] = fDisplacementGenerator->Uniform(-lParMisAlig[2][1]+lParMisAlig[2][0], lParMisAlig[2][0]+lParMisAlig[2][1]);
328e160e	214
4600314b	215	angMisAlig[0] = fDisplacementGenerator->Uniform(-lParMisAlig[3][1]+lParMisAlig[3][0], lParMisAlig[3][0]+lParMisAlig[3][1]);
	216	angMisAlig[1] = fDisplacementGenerator->Uniform(-lParMisAlig[4][1]+lParMisAlig[4][0], lParMisAlig[4][0]+lParMisAlig[4][1]);
	217	angMisAlig[2] = fDisplacementGenerator->Uniform(-lParMisAlig[5][1]+lParMisAlig[5][0], lParMisAlig[5][0]+lParMisAlig[5][1]); // degrees
328e160e	218	}
	219
	220	//_________________________________________________________________________
4600314b	221	void AliMUONGeometryMisAligner::GetGausMisAlign(Double_t cartMisAlig[3], Double_t angMisAlig[3], const Double_t lParMisAlig[6][2]) const
328e160e	222	{
328e160e	223	/// Misalign using gaussian distribution
a9aad96e	224	/**
328e160e	225	misalign the centre of the local transformation
	226	rotation axes :
	227	fAngMisAlig[1,2,3] = [x,y,z]
	228	Assume that misalignment about the x and y axes (misalignment of z plane)
	229	is much smaller, since the entire detection plane has to be moved (the
	230	detection elements are on a support structure), while rotation of the x-y
	231	plane is more free.
	232	*/
4600314b	233	cartMisAlig[0] = fDisplacementGenerator->Gaus(lParMisAlig[0][0], lParMisAlig[0][1]);
	234	cartMisAlig[1] = fDisplacementGenerator->Gaus(lParMisAlig[1][0], lParMisAlig[1][1]);
	235	cartMisAlig[2] = fDisplacementGenerator->Gaus(lParMisAlig[2][0], lParMisAlig[2][1]);
328e160e	236
4600314b	237	angMisAlig[0] = fDisplacementGenerator->Gaus(lParMisAlig[3][0], lParMisAlig[3][1]);
	238	angMisAlig[1] = fDisplacementGenerator->Gaus(lParMisAlig[4][0], lParMisAlig[4][1]);
	239	angMisAlig[2] = fDisplacementGenerator->Gaus(lParMisAlig[5][0], lParMisAlig[5][1]); // degrees
21dd83fc	240	}
	241
	242	//_________________________________________________________________________
4600314b	243	TGeoCombiTrans AliMUONGeometryMisAligner::MisAlignDetElem(const TGeoCombiTrans & transform) const
21dd83fc	244	{
4600314b	245	/// Misalign given transformation and return the misaligned transformation.
	246	/// Use misalignment parameters for detection elements.
	247	/// Note that applied misalignments are small deltas with respect to the detection
	248	/// element own ideal local reference frame. Thus deltaTransf represents
	249	/// the transformation to go from the misaligned d.e. local coordinates to the
	250	/// ideal d.e. local coordinates.
	251	/// Also note that this -is not- what is in the ALICE alignment framework known
	252	/// as local nor global (see AliMUONGeometryMisAligner::MisAlign)
21dd83fc	253
	254	Double_t cartMisAlig[3] = {0,0,0};
	255	Double_t angMisAlig[3] = {0,0,0};
328e160e	256
328e160e	257	if (fUseUni) {
4600314b	258	GetUniMisAlign(cartMisAlig,angMisAlig,fDetElemMisAlig);
328e160e	259	}
	260	else {
	261	if (!fUseGaus) {
	262	AliWarning("Neither uniform nor gausian distribution is set! Will use gausian...");
	263	}
4600314b	264	GetGausMisAlign(cartMisAlig,angMisAlig,fDetElemMisAlig);
328e160e	265	}
328e160e	266
4600314b	267	TGeoTranslation deltaTrans(cartMisAlig[0], cartMisAlig[1], cartMisAlig[2]);
	268	TGeoRotation deltaRot;
	269	deltaRot.RotateX(angMisAlig[0]);
	270	deltaRot.RotateY(angMisAlig[1]);
	271	deltaRot.RotateZ(angMisAlig[2]);
	272
	273	TGeoCombiTrans deltaTransf(deltaTrans,deltaRot);
	274	TGeoHMatrix newTransfMat = transform * deltaTransf;
	275
ef4cb4f1	276	AliInfo(Form("Rotated DE by %f about Z axis.", angMisAlig[2]));
4600314b	277
	278	return TGeoCombiTrans(newTransfMat);
	279	}
	280
	281	//_________________________________________________________________________
	282	TGeoCombiTrans AliMUONGeometryMisAligner::MisAlignModule(const TGeoCombiTrans & transform) const
	283	{
	284	/// Misalign given transformation and return the misaligned transformation.
	285	/// Use misalignment parameters for modules.
	286	/// Note that applied misalignments are small deltas with respect to the module
	287	/// own ideal local reference frame. Thus deltaTransf represents
	288	/// the transformation to go from the misaligned module local coordinates to the
	289	/// ideal module local coordinates.
	290	/// Also note that this -is not- what is in the ALICE alignment framework known
	291	/// as local nor global (see AliMUONGeometryMisAligner::MisAlign)
21dd83fc	292
4600314b	293	Double_t cartMisAlig[3] = {0,0,0};
	294	Double_t angMisAlig[3] = {0,0,0};
	295
	296	if (fUseUni) {
	297	GetUniMisAlign(cartMisAlig,angMisAlig,fModuleMisAlig);
	298	}
	299	else {
	300	if (!fUseGaus) {
	301	AliWarning("Neither uniform nor gausian distribution is set! Will use gausian...");
	302	}
	303	GetGausMisAlign(cartMisAlig,angMisAlig,fModuleMisAlig);
	304	}
	305
	306	TGeoTranslation deltaTrans(cartMisAlig[0], cartMisAlig[1], cartMisAlig[2]);
	307	TGeoRotation deltaRot;
	308	deltaRot.RotateX(angMisAlig[0]);
	309	deltaRot.RotateY(angMisAlig[1]);
	310	deltaRot.RotateZ(angMisAlig[2]);
21dd83fc	311
4600314b	312	TGeoCombiTrans deltaTransf(deltaTrans,deltaRot);
	313	TGeoHMatrix newTransfMat = transform * deltaTransf;
	314
	315	AliInfo(Form("Rotated Module by %f about Z axis.", angMisAlig[2]));
	316
	317	return TGeoCombiTrans(newTransfMat);
21dd83fc	318	}
21dd83fc	319
21dd83fc	320	//______________________________________________________________________
	321	AliMUONGeometryTransformer *
	322	AliMUONGeometryMisAligner::MisAlign(const AliMUONGeometryTransformer *
4600314b	323	transformer, Bool_t verbose)
21dd83fc	324	{
4600314b	325	/// Takes the internal geometry module transformers, copies them to
	326	/// new geometry module transformers.
	327	/// Calculates module misalignment parameters and applies these
	328	/// to the new module transformer.
	329	/// Calculates the module misalignment delta transformation in the
	330	/// Alice Alignment Framework newTransf = delta * oldTransf.
	331	/// Add a module misalignment to the new geometry transformer.
	332	/// Gets the Detection Elements from the module transformer.
a9aad96e	333	/// Calculates misalignment parameters and applies these
4600314b	334	/// to the local transformation of the Detection Element.
	335	/// Obtains the new global transformation by multiplying the new
	336	/// module transformer transformation with the new local transformation.
	337	/// Applies the new global transform to a new detection element.
	338	/// Adds the new detection element to a new module transformer.
	339	/// Calculates the d.e. misalignment delta transformation in the
	340	/// Alice Alignment Framework (newGlobalTransf = delta * oldGlobalTransf).
	341	/// Add a d.e. misalignment to the new geometry transformer.
	342	/// Adds the new module transformer to a new geometry transformer.
	343	/// Returns the new geometry transformer.
21dd83fc	344
	345
	346	AliMUONGeometryTransformer *newGeometryTransformer =
ef4cb4f1	347	new AliMUONGeometryTransformer();
21dd83fc	348	for (Int_t iMt = 0; iMt < transformer->GetNofModuleTransformers(); iMt++)
21dd83fc	349	{ // module transformers
21dd83fc	350	const AliMUONGeometryModuleTransformer *kModuleTransformer =
	351	transformer->GetModuleTransformer(iMt, true);
	352
	353	AliMUONGeometryModuleTransformer *newModuleTransformer =
	354	new AliMUONGeometryModuleTransformer(iMt);
	355	newGeometryTransformer->AddModuleTransformer(newModuleTransformer);
	356
ef79ed3a	357	TGeoCombiTrans moduleTransform =
ef79ed3a	358	TGeoCombiTrans(*kModuleTransformer->GetTransformation());
4600314b	359	// New module transformation
	360	TGeoCombiTrans newModuleTransform = MisAlignModule(moduleTransform);
	361	newModuleTransformer->SetTransformation(newModuleTransform);
	362
	363	// Get delta transformation:
	364	// Tdelta = Tnew * Told.inverse
	365	TGeoHMatrix deltaModuleTransform =
	366	AliMUONGeometryBuilder::Multiply(
	367	newModuleTransform,
	368	kModuleTransformer->GetTransformation()->Inverse());
	369
	370	// Create module mis alignment matrix
	371	newGeometryTransformer
	372	->AddMisAlignModule(kModuleTransformer->GetModuleId(), deltaModuleTransform);
21dd83fc	373
8c95578a	374	AliMpExMap *detElements = kModuleTransformer->GetDetElementStore();
21dd83fc	375
21dd83fc	376	if (verbose)
4600314b	377	AliInfo(Form("%i DEs in old GeometryStore %i",detElements->GetSize(), iMt));
21dd83fc	378
630711ed	379	TIter next(detElements->CreateIterator());
	380	AliMUONGeometryDetElement *detElement;
	381
	382	while ( ( detElement = static_cast<AliMUONGeometryDetElement*>(next()) ) )
	383	{
ef79ed3a	384	/// make a new detection element
21dd83fc	385	AliMUONGeometryDetElement *newDetElement =
21dd83fc	386	new AliMUONGeometryDetElement(detElement->GetId(),
ef79ed3a	387	detElement->GetVolumePath());
21dd83fc	388
ef79ed3a	389	// local transformation of this detection element.
	390	TGeoCombiTrans localTransform
	391	= TGeoCombiTrans(*detElement->GetLocalTransformation());
4600314b	392	TGeoCombiTrans newLocalTransform = MisAlignDetElem(localTransform);
	393	newDetElement->SetLocalTransformation(newLocalTransform);
	394
21dd83fc	395
ef79ed3a	396	// global transformation
ef79ed3a	397	TGeoHMatrix newGlobalTransform =
4600314b	398	AliMUONGeometryBuilder::Multiply(newModuleTransform,
4600314b	399	newLocalTransform);
21dd83fc	400	newDetElement->SetGlobalTransformation(newGlobalTransform);
ef79ed3a	401
	402	// add this det element to module
	403	newModuleTransformer->GetDetElementStore()->Add(newDetElement->GetId(),
21dd83fc	404	newDetElement);
4600314b	405
	406	// In the Alice Alignment Framework misalignment objects store
	407	// global delta transformation
	408	// Get detection "intermediate" global transformation
	409	TGeoHMatrix newOldGlobalTransform = newModuleTransform * localTransform;
	410	// Get detection element global delta transformation:
ef79ed3a	411	// Tdelta = Tnew * Told.inverse
4600314b	412	TGeoHMatrix deltaGlobalTransform
ef79ed3a	413	= AliMUONGeometryBuilder::Multiply(
ef79ed3a	414	newGlobalTransform,
4600314b	415	newOldGlobalTransform.Inverse());
ef79ed3a	416
	417	// Create mis alignment matrix
	418	newGeometryTransformer
4600314b	419	->AddMisAlignDetElement(detElement->GetId(), deltaGlobalTransform);
21dd83fc	420	}
4600314b	421
4600314b	422
21dd83fc	423	if (verbose)
	424	AliInfo(Form("Added module transformer %i to the transformer", iMt));
	425	newGeometryTransformer->AddModuleTransformer(newModuleTransformer);
	426	}
	427	return newGeometryTransformer;
	428	}
	429
	430
	431
	432