[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 "AliLog.h"

#include <TGeoMatrix.h>
#include <TMath.h>
#include <TRandom.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 Module 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(kTRUE);
  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));

      for (Int_t iDe = 0; iDe < detElements->GetSize(); iDe++)
	{			// detection elements.
	  AliMUONGeometryDetElement *detElement =
	    (AliMUONGeometryDetElement *) detElements->GetObject(iDe);

	  if (!detElement)
	    AliFatal("Detection element not found.");

	  /// 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
	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	//
	18	//__________________________________________________________________
	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	///
	44	/// \author Bruce Becker, Javier Castillo
	45
	46	#include "AliMUONGeometryMisAligner.h"
	47	#include "AliMUONGeometryTransformer.h"
	48	#include "AliMUONGeometryModuleTransformer.h"
	49	#include "AliMUONGeometryDetElement.h"
	50	#include "AliMUONGeometryBuilder.h"
	51
	52	#include "AliMpExMap.h"
	53
	54	#include "AliLog.h"
	55
	56	#include <TGeoMatrix.h>
	57	#include <TMath.h>
	58	#include <TRandom.h>
	59
	60	/// \cond CLASSIMP
	61	ClassImp(AliMUONGeometryMisAligner)
	62	/// \endcond
	63
	64	//______________________________________________________________________________
	65	AliMUONGeometryMisAligner::AliMUONGeometryMisAligner(Double_t cartXMisAligM, Double_t cartXMisAligW, Double_t cartYMisAligM, Double_t cartYMisAligW, Double_t angMisAligM, Double_t angMisAligW)
	66	: TObject(),
	67	fUseUni(kFALSE),
	68	fUseGaus(kTRUE),
	69	fXYAngMisAligFactor(0.0),
	70	fZCartMisAligFactor(0.0),
	71	fDisplacementGenerator(0)
	72	{
	73	/// Standard constructor
	74	for (Int_t i=0; i<6; i++){
	75	for (Int_t j=0; j<2; j++){
	76	fDetElemMisAlig[i][j] = 0.0;
	77	fModuleMisAlig[i][j] = 0.0;
	78	}
	79	}
	80	fDetElemMisAlig[0][0] = cartXMisAligM;
	81	fDetElemMisAlig[0][1] = cartXMisAligW;
	82	fDetElemMisAlig[1][0] = cartYMisAligM;
	83	fDetElemMisAlig[1][1] = cartYMisAligW;
	84	fDetElemMisAlig[5][0] = angMisAligM;
	85	fDetElemMisAlig[5][1] = angMisAligW;
	86
	87	fDisplacementGenerator = new TRandom(0);
	88	}
	89
	90	//______________________________________________________________________________
	91	AliMUONGeometryMisAligner::AliMUONGeometryMisAligner(Double_t cartMisAligM, Double_t cartMisAligW, Double_t angMisAligM, Double_t angMisAligW)
	92	: TObject(),
	93	fUseUni(kFALSE),
	94	fUseGaus(kTRUE),
	95	fXYAngMisAligFactor(0.0),
	96	fZCartMisAligFactor(0.0),
	97	fDisplacementGenerator(0)
	98	{
	99	/// Standard constructor
	100	for (Int_t i=0; i<6; i++){
	101	for (Int_t j=0; j<2; j++){
	102	fDetElemMisAlig[i][j] = 0.0;
	103	fModuleMisAlig[i][j] = 0.0;
	104	}
	105	}
	106	fDetElemMisAlig[0][0] = cartMisAligM;
	107	fDetElemMisAlig[0][1] = cartMisAligW;
	108	fDetElemMisAlig[1][0] = cartMisAligM;
	109	fDetElemMisAlig[1][1] = cartMisAligW;
	110	fDetElemMisAlig[5][0] = angMisAligM;
	111	fDetElemMisAlig[5][1] = angMisAligW;
	112
	113	fDisplacementGenerator = new TRandom(0);
	114	}
	115
	116	//______________________________________________________________________________
	117	AliMUONGeometryMisAligner::AliMUONGeometryMisAligner(Double_t cartMisAlig, Double_t angMisAlig)
	118	: TObject(),
	119	fUseUni(kTRUE),
	120	fUseGaus(kFALSE),
	121	fXYAngMisAligFactor(0.0),
	122	fZCartMisAligFactor(0.0),
	123	fDisplacementGenerator(0)
	124	{
	125	/// Standard constructor
	126	for (Int_t i=0; i<6; i++){
	127	for (Int_t j=0; j<2; j++){
	128	fDetElemMisAlig[i][j] = 0.0;
	129	fModuleMisAlig[i][j] = 0.0;
	130	}
	131	}
	132	fDetElemMisAlig[0][1] = cartMisAlig;
	133	fDetElemMisAlig[1][1] = cartMisAlig;
	134	fDetElemMisAlig[5][1] = angMisAlig;
	135
	136	fDisplacementGenerator = new TRandom(0);
	137	}
	138
	139	//_____________________________________________________________________________
	140	AliMUONGeometryMisAligner::AliMUONGeometryMisAligner()
	141	: TObject(),
	142	fUseUni(kTRUE),
	143	fUseGaus(kFALSE),
	144	fXYAngMisAligFactor(0.0),
	145	fZCartMisAligFactor(0.0),
	146	fDisplacementGenerator(0)
	147	{
	148	/// Default constructor
	149	for (Int_t i=0; i<6; i++){
	150	for (Int_t j=0; j<2; j++){
	151	fDetElemMisAlig[i][j] = 0.0;
	152	fModuleMisAlig[i][j] = 0.0;
	153	}
	154	}
	155	}
	156
	157	//______________________________________________________________________________
	158	AliMUONGeometryMisAligner::~AliMUONGeometryMisAligner()
	159	{
	160	/// Destructor
	161
	162	if (fDisplacementGenerator) delete fDisplacementGenerator;
	163	}
	164
	165	//_________________________________________________________________________
	166	void
	167	AliMUONGeometryMisAligner::SetXYAngMisAligFactor(Double_t factor)
	168	{
	169	/// Set XY angular misalign factor
	170
	171	if (TMath::Abs(factor) > 1.0 && factor > 0.){
	172	fXYAngMisAligFactor = factor;
	173	fDetElemMisAlig[3][0] = fDetElemMisAlig[5][0]*factor; // These lines were
	174	fDetElemMisAlig[3][1] = fDetElemMisAlig[5][1]*factor; // added to keep
	175	fDetElemMisAlig[4][0] = fDetElemMisAlig[5][0]*factor; // backward
	176	fDetElemMisAlig[4][1] = fDetElemMisAlig[5][1]*factor; // compatibility
	177	}
	178	else
	179	AliError(Form("Invalid XY angular misalign factor, %d", factor));
	180	}
	181
	182	//_________________________________________________________________________
	183	void AliMUONGeometryMisAligner::SetZCartMisAligFactor(Double_t factor)
	184	{
	185	/// Set XY angular misalign factor
	186	if (TMath::Abs(factor)<1.0 && factor>0.) {
	187	fZCartMisAligFactor = factor;
	188	fDetElemMisAlig[2][0] = fDetElemMisAlig[0][0]; // These lines were added to
	189	fDetElemMisAlig[2][1] = fDetElemMisAlig[0][1]*factor; // keep backward compatibility
	190	}
	191	else
	192	AliError(Form("Invalid Z cartesian misalign factor, %d", factor));
	193	}
	194
	195	//_________________________________________________________________________
	196	void AliMUONGeometryMisAligner::GetUniMisAlign(Double_t cartMisAlig[3], Double_t angMisAlig[3], const Double_t lParMisAlig[6][2]) const
	197	{
	198	/// Misalign using uniform distribution
	199	/**
	200	misalign the centre of the local transformation
	201	rotation axes :
	202	fAngMisAlig[1,2,3] = [x,y,z]
	203	Assume that misalignment about the x and y axes (misalignment of z plane)
	204	is much smaller, since the entire detection plane has to be moved (the
	205	detection elements are on a support structure), while rotation of the x-y
	206	plane is more free.
	207	*/
	208	cartMisAlig[0] = fDisplacementGenerator->Uniform(-lParMisAlig[0][1]+lParMisAlig[0][0], lParMisAlig[0][0]+lParMisAlig[0][1]);
	209	cartMisAlig[1] = fDisplacementGenerator->Uniform(-lParMisAlig[1][1]+lParMisAlig[1][0], lParMisAlig[1][0]+lParMisAlig[1][1]);
	210	cartMisAlig[2] = fDisplacementGenerator->Uniform(-lParMisAlig[2][1]+lParMisAlig[2][0], lParMisAlig[2][0]+lParMisAlig[2][1]);
	211
	212	angMisAlig[0] = fDisplacementGenerator->Uniform(-lParMisAlig[3][1]+lParMisAlig[3][0], lParMisAlig[3][0]+lParMisAlig[3][1]);
	213	angMisAlig[1] = fDisplacementGenerator->Uniform(-lParMisAlig[4][1]+lParMisAlig[4][0], lParMisAlig[4][0]+lParMisAlig[4][1]);
	214	angMisAlig[2] = fDisplacementGenerator->Uniform(-lParMisAlig[5][1]+lParMisAlig[5][0], lParMisAlig[5][0]+lParMisAlig[5][1]); // degrees
	215	}
	216
	217	//_________________________________________________________________________
	218	void AliMUONGeometryMisAligner::GetGausMisAlign(Double_t cartMisAlig[3], Double_t angMisAlig[3], const Double_t lParMisAlig[6][2]) const
	219	{
	220	/// Misalign using gaussian distribution
	221	/**
	222	misalign the centre of the local transformation
	223	rotation axes :
	224	fAngMisAlig[1,2,3] = [x,y,z]
	225	Assume that misalignment about the x and y axes (misalignment of z plane)
	226	is much smaller, since the entire detection plane has to be moved (the
	227	detection elements are on a support structure), while rotation of the x-y
	228	plane is more free.
	229	*/
	230	cartMisAlig[0] = fDisplacementGenerator->Gaus(lParMisAlig[0][0], lParMisAlig[0][1]);
	231	cartMisAlig[1] = fDisplacementGenerator->Gaus(lParMisAlig[1][0], lParMisAlig[1][1]);
	232	cartMisAlig[2] = fDisplacementGenerator->Gaus(lParMisAlig[2][0], lParMisAlig[2][1]);
	233
	234	angMisAlig[0] = fDisplacementGenerator->Gaus(lParMisAlig[3][0], lParMisAlig[3][1]);
	235	angMisAlig[1] = fDisplacementGenerator->Gaus(lParMisAlig[4][0], lParMisAlig[4][1]);
	236	angMisAlig[2] = fDisplacementGenerator->Gaus(lParMisAlig[5][0], lParMisAlig[5][1]); // degrees
	237	}
	238
	239	//_________________________________________________________________________
	240	TGeoCombiTrans AliMUONGeometryMisAligner::MisAlignDetElem(const TGeoCombiTrans & transform) const
	241	{
	242	/// Misalign given transformation and return the misaligned transformation.
	243	/// Use misalignment parameters for detection elements.
	244	/// Note that applied misalignments are small deltas with respect to the detection
	245	/// element own ideal local reference frame. Thus deltaTransf represents
	246	/// the transformation to go from the misaligned d.e. local coordinates to the
	247	/// ideal d.e. local coordinates.
	248	/// Also note that this -is not- what is in the ALICE alignment framework known
	249	/// as local nor global (see AliMUONGeometryMisAligner::MisAlign)
	250
	251	Double_t cartMisAlig[3] = {0,0,0};
	252	Double_t angMisAlig[3] = {0,0,0};
	253
	254	if (fUseUni) {
	255	GetUniMisAlign(cartMisAlig,angMisAlig,fDetElemMisAlig);
	256	}
	257	else {
	258	if (!fUseGaus) {
	259	AliWarning("Neither uniform nor gausian distribution is set! Will use gausian...");
	260	}
	261	GetGausMisAlign(cartMisAlig,angMisAlig,fDetElemMisAlig);
	262	}
	263
	264	TGeoTranslation deltaTrans(cartMisAlig[0], cartMisAlig[1], cartMisAlig[2]);
	265	TGeoRotation deltaRot;
	266	deltaRot.RotateX(angMisAlig[0]);
	267	deltaRot.RotateY(angMisAlig[1]);
	268	deltaRot.RotateZ(angMisAlig[2]);
	269
	270	TGeoCombiTrans deltaTransf(deltaTrans,deltaRot);
	271	TGeoHMatrix newTransfMat = transform * deltaTransf;
	272
	273	AliInfo(Form("Rotated Module by %f about Z axis.", angMisAlig[2]));
	274
	275	return TGeoCombiTrans(newTransfMat);
	276	}
	277
	278	//_________________________________________________________________________
	279	TGeoCombiTrans AliMUONGeometryMisAligner::MisAlignModule(const TGeoCombiTrans & transform) const
	280	{
	281	/// Misalign given transformation and return the misaligned transformation.
	282	/// Use misalignment parameters for modules.
	283	/// Note that applied misalignments are small deltas with respect to the module
	284	/// own ideal local reference frame. Thus deltaTransf represents
	285	/// the transformation to go from the misaligned module local coordinates to the
	286	/// ideal module local coordinates.
	287	/// Also note that this -is not- what is in the ALICE alignment framework known
	288	/// as local nor global (see AliMUONGeometryMisAligner::MisAlign)
	289
	290	Double_t cartMisAlig[3] = {0,0,0};
	291	Double_t angMisAlig[3] = {0,0,0};
	292
	293	if (fUseUni) {
	294	GetUniMisAlign(cartMisAlig,angMisAlig,fModuleMisAlig);
	295	}
	296	else {
	297	if (!fUseGaus) {
	298	AliWarning("Neither uniform nor gausian distribution is set! Will use gausian...");
	299	}
	300	GetGausMisAlign(cartMisAlig,angMisAlig,fModuleMisAlig);
	301	}
	302
	303	TGeoTranslation deltaTrans(cartMisAlig[0], cartMisAlig[1], cartMisAlig[2]);
	304	TGeoRotation deltaRot;
	305	deltaRot.RotateX(angMisAlig[0]);
	306	deltaRot.RotateY(angMisAlig[1]);
	307	deltaRot.RotateZ(angMisAlig[2]);
	308
	309	TGeoCombiTrans deltaTransf(deltaTrans,deltaRot);
	310	TGeoHMatrix newTransfMat = transform * deltaTransf;
	311
	312	AliInfo(Form("Rotated Module by %f about Z axis.", angMisAlig[2]));
	313
	314	return TGeoCombiTrans(newTransfMat);
	315	}
	316
	317	//______________________________________________________________________
	318	AliMUONGeometryTransformer *
	319	AliMUONGeometryMisAligner::MisAlign(const AliMUONGeometryTransformer *
	320	transformer, Bool_t verbose)
	321	{
	322	/// Takes the internal geometry module transformers, copies them to
	323	/// new geometry module transformers.
	324	/// Calculates module misalignment parameters and applies these
	325	/// to the new module transformer.
	326	/// Calculates the module misalignment delta transformation in the
	327	/// Alice Alignment Framework newTransf = delta * oldTransf.
	328	/// Add a module misalignment to the new geometry transformer.
	329	/// Gets the Detection Elements from the module transformer.
	330	/// Calculates misalignment parameters and applies these
	331	/// to the local transformation of the Detection Element.
	332	/// Obtains the new global transformation by multiplying the new
	333	/// module transformer transformation with the new local transformation.
	334	/// Applies the new global transform to a new detection element.
	335	/// Adds the new detection element to a new module transformer.
	336	/// Calculates the d.e. misalignment delta transformation in the
	337	/// Alice Alignment Framework (newGlobalTransf = delta * oldGlobalTransf).
	338	/// Add a d.e. misalignment to the new geometry transformer.
	339	/// Adds the new module transformer to a new geometry transformer.
	340	/// Returns the new geometry transformer.
	341
	342
	343	AliMUONGeometryTransformer *newGeometryTransformer =
	344	new AliMUONGeometryTransformer(kTRUE);
	345	for (Int_t iMt = 0; iMt < transformer->GetNofModuleTransformers(); iMt++)
	346	{ // module transformers
	347	const AliMUONGeometryModuleTransformer *kModuleTransformer =
	348	transformer->GetModuleTransformer(iMt, true);
	349
	350	AliMUONGeometryModuleTransformer *newModuleTransformer =
	351	new AliMUONGeometryModuleTransformer(iMt);
	352	newGeometryTransformer->AddModuleTransformer(newModuleTransformer);
	353
	354	TGeoCombiTrans moduleTransform =
	355	TGeoCombiTrans(*kModuleTransformer->GetTransformation());
	356	// New module transformation
	357	TGeoCombiTrans newModuleTransform = MisAlignModule(moduleTransform);
	358	newModuleTransformer->SetTransformation(newModuleTransform);
	359
	360	// Get delta transformation:
	361	// Tdelta = Tnew * Told.inverse
	362	TGeoHMatrix deltaModuleTransform =
	363	AliMUONGeometryBuilder::Multiply(
	364	newModuleTransform,
	365	kModuleTransformer->GetTransformation()->Inverse());
	366
	367	// Create module mis alignment matrix
	368	newGeometryTransformer
	369	->AddMisAlignModule(kModuleTransformer->GetModuleId(), deltaModuleTransform);
	370
	371	AliMpExMap *detElements = kModuleTransformer->GetDetElementStore();
	372
	373	if (verbose)
	374	AliInfo(Form("%i DEs in old GeometryStore %i",detElements->GetSize(), iMt));
	375
	376	for (Int_t iDe = 0; iDe < detElements->GetSize(); iDe++)
	377	{ // detection elements.
	378	AliMUONGeometryDetElement *detElement =
	379	(AliMUONGeometryDetElement *) detElements->GetObject(iDe);
	380
	381	if (!detElement)
	382	AliFatal("Detection element not found.");
	383
	384	/// make a new detection element
	385	AliMUONGeometryDetElement *newDetElement =
	386	new AliMUONGeometryDetElement(detElement->GetId(),
	387	detElement->GetVolumePath());
	388
	389	// local transformation of this detection element.
	390	TGeoCombiTrans localTransform
	391	= TGeoCombiTrans(*detElement->GetLocalTransformation());
	392	TGeoCombiTrans newLocalTransform = MisAlignDetElem(localTransform);
	393	newDetElement->SetLocalTransformation(newLocalTransform);
	394
	395
	396	// global transformation
	397	TGeoHMatrix newGlobalTransform =
	398	AliMUONGeometryBuilder::Multiply(newModuleTransform,
	399	newLocalTransform);
	400	newDetElement->SetGlobalTransformation(newGlobalTransform);
	401
	402	// add this det element to module
	403	newModuleTransformer->GetDetElementStore()->Add(newDetElement->GetId(),
	404	newDetElement);
	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:
	411	// Tdelta = Tnew * Told.inverse
	412	TGeoHMatrix deltaGlobalTransform
	413	= AliMUONGeometryBuilder::Multiply(
	414	newGlobalTransform,
	415	newOldGlobalTransform.Inverse());
	416
	417	// Create mis alignment matrix
	418	newGeometryTransformer
	419	->AddMisAlignDetElement(detElement->GetId(), deltaGlobalTransform);
	420	}
	421
	422
	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