[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.
///
/// \authors Bruce Becker, Javier Castillo

#include "AliMUONGeometryMisAligner.h"
#include "AliMUONGeometryTransformer.h"
#include "AliMUONGeometryModuleTransformer.h"
#include "AliMUONGeometryDetElement.h"
#include "AliMUONGeometryStore.h"
#include "AliMUONGeometryBuilder.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(), fDisplacementGenerator(0)
{
  /// Standard constructor
  fCartXMisAligM = cartXMisAligM;
  fCartXMisAligW = cartXMisAligW;	// 0.5 mm. Perhaps this should go into AliMUONConstants.h ? 
  fCartYMisAligM = cartYMisAligM;
  fCartYMisAligW = cartYMisAligW;	// 0.5 mm. Perhaps this should go into AliMUONConstants.h ? 
  fAngMisAligM = angMisAligM;
  fAngMisAligW = angMisAligW;
  fXYAngMisAligFactor = 0.0;
  fZCartMisAligFactor = 0.0;
  fDisplacementGenerator = new TRandom(0);
  fUseUni = kFALSE;
  fUseGaus = kTRUE;
}

//______________________________________________________________________________
AliMUONGeometryMisAligner::AliMUONGeometryMisAligner(Double_t cartMisAligM, Double_t cartMisAligW, Double_t angMisAligM, Double_t angMisAligW)
:TObject(), fDisplacementGenerator(0)
{
  /// Standard constructor
  fCartXMisAligM = cartMisAligM;
  fCartXMisAligW = cartMisAligW;	// 0.5 mm. Perhaps this should go into AliMUONConstants.h ? 
  fCartYMisAligM = cartMisAligM;
  fCartYMisAligW = cartMisAligW;	// 0.5 mm. Perhaps this should go into AliMUONConstants.h ? 
  fAngMisAligM = angMisAligM;
  fAngMisAligW = angMisAligW;
  fXYAngMisAligFactor = 0.0;
  fZCartMisAligFactor = 0.0;
  fDisplacementGenerator = new TRandom(0);
  fUseUni = kFALSE;
  fUseGaus = kTRUE;
}

//______________________________________________________________________________
AliMUONGeometryMisAligner::AliMUONGeometryMisAligner(Double_t cartMisAlig, Double_t angMisAlig)
:TObject(), fDisplacementGenerator(0)
{
  /// Standard constructor
  fCartXMisAligM = 0.;
  fCartXMisAligW = cartMisAlig;	// 0.5 mm. Perhaps this should go into AliMUONConstants.h ? 
  fCartYMisAligM = 0.;
  fCartYMisAligW = cartMisAlig;	// 0.5 mm. Perhaps this should go into AliMUONConstants.h ? 
  fAngMisAligM = 0.;
  fAngMisAligW = angMisAlig;
  fXYAngMisAligFactor = 0.0;
  fZCartMisAligFactor = 0.0;
  fDisplacementGenerator = new TRandom(0);
  fUseUni = kTRUE;
  fUseGaus = kFALSE;
}

//_____________________________________________________________________________
AliMUONGeometryMisAligner::AliMUONGeometryMisAligner()
:TObject(), fDisplacementGenerator(0)
{
/// Default constructor
}

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

  delete fDisplacementGenerator;
}

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

  if (TMath::Abs(factor) > 1.0 && factor > 0.)
    fXYAngMisAligFactor = factor;
  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;
  else
    AliError(Form("Invalid Z cartesian misalign factor, %d", factor));
}

//_________________________________________________________________________
void AliMUONGeometryMisAligner::GetUniMisAlign(Double_t cartMisAlig[3], Double_t angMisAlig[3]) 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(-fCartXMisAligW+fCartXMisAligM, fCartXMisAligM+fCartXMisAligW);
  cartMisAlig[1] = fDisplacementGenerator->Uniform(-fCartYMisAligW+fCartYMisAligM, fCartYMisAligM+fCartYMisAligW);
  cartMisAlig[2] = fDisplacementGenerator->Uniform(-fZCartMisAligFactor*(fCartXMisAligW+fCartXMisAligM), fZCartMisAligFactor*(fCartXMisAligM+fCartXMisAligW));  
 
  angMisAlig[0] = fDisplacementGenerator->Uniform(-fXYAngMisAligFactor*(fAngMisAligW+fAngMisAligM), fXYAngMisAligFactor*(fAngMisAligM+fAngMisAligW));
  angMisAlig[1] = fDisplacementGenerator->Uniform(-fXYAngMisAligFactor*(fAngMisAligW+fAngMisAligM), fXYAngMisAligFactor*(fAngMisAligM+fAngMisAligW));
  angMisAlig[2] = fDisplacementGenerator->Uniform(-fAngMisAligW+fAngMisAligM, fAngMisAligM+fAngMisAligW);	// degrees
}

//_________________________________________________________________________
void AliMUONGeometryMisAligner::GetGausMisAlign(Double_t cartMisAlig[3], Double_t angMisAlig[3]) 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(fCartXMisAligM, fCartXMisAligW);
  cartMisAlig[1] = fDisplacementGenerator->Gaus(fCartYMisAligM, fCartYMisAligW);
  cartMisAlig[2] = fDisplacementGenerator->Gaus(fCartXMisAligM, fZCartMisAligFactor*fCartXMisAligW);
 
  angMisAlig[0] = fDisplacementGenerator->Gaus(fAngMisAligM, fXYAngMisAligFactor*fAngMisAligW);
  angMisAlig[1] = fDisplacementGenerator->Gaus(fAngMisAligM, fXYAngMisAligFactor*fAngMisAligW);
  angMisAlig[2] = fDisplacementGenerator->Gaus(fAngMisAligM, fAngMisAligW);	// degrees
}

//_________________________________________________________________________
TGeoCombiTrans AliMUONGeometryMisAligner::MisAlign(const TGeoCombiTrans & transform) const
{
  /// Misalign given transformation and return the misaligned transformation
  
  Double_t cartMisAlig[3] = {0,0,0};
  Double_t angMisAlig[3] = {0,0,0};
  const Double_t *trans = transform.GetTranslation();
  TGeoRotation *rot;
  // check if the rotation we obtain is not NULL
  if (transform.GetRotation())
    {
      rot = transform.GetRotation();
    }
  else
    {
      rot = new TGeoRotation("rot");
    }			// default constructor.

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

  TGeoTranslation newTrans(cartMisAlig[0] + trans[0], cartMisAlig[1] + trans[1], cartMisAlig[2] + trans[2]);
  
  AliInfo(Form("Rotated by %f about Z axis.", angMisAlig[2]));
  rot->RotateX(angMisAlig[0]);
  rot->RotateY(angMisAlig[1]);
  rot->RotateZ(angMisAlig[2]);

  return TGeoCombiTrans(newTrans, *rot);
}

//______________________________________________________________________
AliMUONGeometryTransformer *
AliMUONGeometryMisAligner::MisAlign(const AliMUONGeometryTransformer *
				 transformer, Bool_t verbose)
{
  /// Takes the internal geometry module transformers, copies them
  /// and gets the Detection Elements from them.
  /// Calculates misalignment parameters and applies these
  /// to the local transform of the Detection Element
  /// Obtains the global transform by multiplying the module transformer
  /// transformation with the local transformation 
  /// Applies the global transform to a new detection element
  /// Adds the new detection element to a new module 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());
      TGeoCombiTrans *newModuleTransform = new TGeoCombiTrans(moduleTransform);	
              // same module transform as the previous one 
	      // no mis align object created
      newModuleTransformer->SetTransformation(moduleTransform);

      AliMUONGeometryStore *detElements =
	kModuleTransformer->GetDetElementStore();

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

      for (Int_t iDe = 0; iDe < detElements->GetNofEntries(); iDe++)
	{			// detection elements.
	  AliMUONGeometryDetElement *detElement =
	    (AliMUONGeometryDetElement *) detElements->GetEntry(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 = MisAlign(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);
          // Get delta transformation: 
	  // Tdelta = Tnew * Told.inverse
	  TGeoHMatrix  deltaTransform
	    = AliMUONGeometryBuilder::Multiply(
	        newGlobalTransform, 
		detElement->GetGlobalTransformation()->Inverse());
	  
	  // Create mis alignment matrix
	  newGeometryTransformer
	    ->AddMisAlignDetElement(detElement->GetId(), deltaTransform);
	}
      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	//
21dd83fc	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	///
	44	/// \authors Bruce Becker, Javier Castillo
21dd83fc	45
21dd83fc	46	#include "AliMUONGeometryMisAligner.h"
	47	#include "AliMUONGeometryTransformer.h"
	48	#include "AliMUONGeometryModuleTransformer.h"
	49	#include "AliMUONGeometryDetElement.h"
	50	#include "AliMUONGeometryStore.h"
	51	#include "AliMUONGeometryBuilder.h"
ef79ed3a	52
	53	#include "AliLog.h"
	54
328e160e	55	#include <TGeoMatrix.h>
21dd83fc	56	#include <TMath.h>
	57	#include <TRandom.h>
	58
a9aad96e	59	/// \cond CLASSIMP
21dd83fc	60	ClassImp(AliMUONGeometryMisAligner)
a9aad96e	61	/// \endcond
a9aad96e	62
328e160e	63	//______________________________________________________________________________
	64	AliMUONGeometryMisAligner::AliMUONGeometryMisAligner(Double_t cartXMisAligM, Double_t cartXMisAligW, Double_t cartYMisAligM, Double_t cartYMisAligW, Double_t angMisAligM, Double_t angMisAligW)
	65	:TObject(), fDisplacementGenerator(0)
	66	{
	67	/// Standard constructor
	68	fCartXMisAligM = cartXMisAligM;
	69	fCartXMisAligW = cartXMisAligW; // 0.5 mm. Perhaps this should go into AliMUONConstants.h ?
	70	fCartYMisAligM = cartYMisAligM;
	71	fCartYMisAligW = cartYMisAligW; // 0.5 mm. Perhaps this should go into AliMUONConstants.h ?
	72	fAngMisAligM = angMisAligM;
	73	fAngMisAligW = angMisAligW;
	74	fXYAngMisAligFactor = 0.0;
	75	fZCartMisAligFactor = 0.0;
	76	fDisplacementGenerator = new TRandom(0);
	77	fUseUni = kFALSE;
	78	fUseGaus = kTRUE;
	79	}
	80
	81	//______________________________________________________________________________
	82	AliMUONGeometryMisAligner::AliMUONGeometryMisAligner(Double_t cartMisAligM, Double_t cartMisAligW, Double_t angMisAligM, Double_t angMisAligW)
	83	:TObject(), fDisplacementGenerator(0)
	84	{
	85	/// Standard constructor
	86	fCartXMisAligM = cartMisAligM;
	87	fCartXMisAligW = cartMisAligW; // 0.5 mm. Perhaps this should go into AliMUONConstants.h ?
	88	fCartYMisAligM = cartMisAligM;
	89	fCartYMisAligW = cartMisAligW; // 0.5 mm. Perhaps this should go into AliMUONConstants.h ?
	90	fAngMisAligM = angMisAligM;
	91	fAngMisAligW = angMisAligW;
	92	fXYAngMisAligFactor = 0.0;
	93	fZCartMisAligFactor = 0.0;
	94	fDisplacementGenerator = new TRandom(0);
	95	fUseUni = kFALSE;
	96	fUseGaus = kTRUE;
	97	}
	98
21dd83fc	99	//______________________________________________________________________________
	100	AliMUONGeometryMisAligner::AliMUONGeometryMisAligner(Double_t cartMisAlig, Double_t angMisAlig)
	101	:TObject(), fDisplacementGenerator(0)
	102	{
	103	/// Standard constructor
328e160e	104	fCartXMisAligM = 0.;
	105	fCartXMisAligW = cartMisAlig; // 0.5 mm. Perhaps this should go into AliMUONConstants.h ?
	106	fCartYMisAligM = 0.;
	107	fCartYMisAligW = cartMisAlig; // 0.5 mm. Perhaps this should go into AliMUONConstants.h ?
	108	fAngMisAligM = 0.;
	109	fAngMisAligW = angMisAlig;
	110	fXYAngMisAligFactor = 0.0;
	111	fZCartMisAligFactor = 0.0;
21dd83fc	112	fDisplacementGenerator = new TRandom(0);
328e160e	113	fUseUni = kTRUE;
328e160e	114	fUseGaus = kFALSE;
21dd83fc	115	}
	116
	117	//_____________________________________________________________________________
	118	AliMUONGeometryMisAligner::AliMUONGeometryMisAligner()
	119	:TObject(), fDisplacementGenerator(0)
	120	{
	121	/// Default constructor
	122	}
	123
21dd83fc	124	//______________________________________________________________________________
	125	AliMUONGeometryMisAligner::~AliMUONGeometryMisAligner()
	126	{
	127	/// Destructor
	128
	129	delete fDisplacementGenerator;
	130	}
	131
490da820	132	//_________________________________________________________________________
21dd83fc	133	void
	134	AliMUONGeometryMisAligner::SetXYAngMisAligFactor(Double_t factor)
	135	{
328e160e	136	/// Set XY angular misalign factor
490da820	137
21dd83fc	138	if (TMath::Abs(factor) > 1.0 && factor > 0.)
	139	fXYAngMisAligFactor = factor;
	140	else
328e160e	141	AliError(Form("Invalid XY angular misalign factor, %d", factor));
	142	}
	143
	144	//_________________________________________________________________________
	145	void AliMUONGeometryMisAligner::SetZCartMisAligFactor(Double_t factor)
	146	{
	147	/// Set XY angular misalign factor
	148	if (TMath::Abs(factor)<1.0 && factor>0.)
	149	fZCartMisAligFactor = factor;
	150	else
	151	AliError(Form("Invalid Z cartesian misalign factor, %d", factor));
	152	}
	153
	154	//_________________________________________________________________________
a9aad96e	155	void AliMUONGeometryMisAligner::GetUniMisAlign(Double_t cartMisAlig[3], Double_t angMisAlig[3]) const
328e160e	156	{
328e160e	157	/// Misalign using uniform distribution
a9aad96e	158	/**
328e160e	159	misalign the centre of the local transformation
	160	rotation axes :
	161	fAngMisAlig[1,2,3] = [x,y,z]
	162	Assume that misalignment about the x and y axes (misalignment of z plane)
	163	is much smaller, since the entire detection plane has to be moved (the
	164	detection elements are on a support structure), while rotation of the x-y
	165	plane is more free.
	166	*/
	167	cartMisAlig[0] = fDisplacementGenerator->Uniform(-fCartXMisAligW+fCartXMisAligM, fCartXMisAligM+fCartXMisAligW);
	168	cartMisAlig[1] = fDisplacementGenerator->Uniform(-fCartYMisAligW+fCartYMisAligM, fCartYMisAligM+fCartYMisAligW);
	169	cartMisAlig[2] = fDisplacementGenerator->Uniform(-fZCartMisAligFactor(fCartXMisAligW+fCartXMisAligM), fZCartMisAligFactor(fCartXMisAligM+fCartXMisAligW));
	170
	171	angMisAlig[0] = fDisplacementGenerator->Uniform(-fXYAngMisAligFactor(fAngMisAligW+fAngMisAligM), fXYAngMisAligFactor(fAngMisAligM+fAngMisAligW));
	172	angMisAlig[1] = fDisplacementGenerator->Uniform(-fXYAngMisAligFactor(fAngMisAligW+fAngMisAligM), fXYAngMisAligFactor(fAngMisAligM+fAngMisAligW));
	173	angMisAlig[2] = fDisplacementGenerator->Uniform(-fAngMisAligW+fAngMisAligM, fAngMisAligM+fAngMisAligW); // degrees
	174	}
	175
	176	//_________________________________________________________________________
	177	void AliMUONGeometryMisAligner::GetGausMisAlign(Double_t cartMisAlig[3], Double_t angMisAlig[3]) const
	178	{
	179	/// Misalign using gaussian distribution
a9aad96e	180	/**
328e160e	181	misalign the centre of the local transformation
	182	rotation axes :
	183	fAngMisAlig[1,2,3] = [x,y,z]
	184	Assume that misalignment about the x and y axes (misalignment of z plane)
	185	is much smaller, since the entire detection plane has to be moved (the
	186	detection elements are on a support structure), while rotation of the x-y
	187	plane is more free.
	188	*/
	189	cartMisAlig[0] = fDisplacementGenerator->Gaus(fCartXMisAligM, fCartXMisAligW);
	190	cartMisAlig[1] = fDisplacementGenerator->Gaus(fCartYMisAligM, fCartYMisAligW);
	191	cartMisAlig[2] = fDisplacementGenerator->Gaus(fCartXMisAligM, fZCartMisAligFactor*fCartXMisAligW);
	192
	193	angMisAlig[0] = fDisplacementGenerator->Gaus(fAngMisAligM, fXYAngMisAligFactor*fAngMisAligW);
	194	angMisAlig[1] = fDisplacementGenerator->Gaus(fAngMisAligM, fXYAngMisAligFactor*fAngMisAligW);
	195	angMisAlig[2] = fDisplacementGenerator->Gaus(fAngMisAligM, fAngMisAligW); // degrees
21dd83fc	196	}
	197
	198	//_________________________________________________________________________
	199	TGeoCombiTrans AliMUONGeometryMisAligner::MisAlign(const TGeoCombiTrans & transform) const
	200	{
	201	/// Misalign given transformation and return the misaligned transformation
	202
	203	Double_t cartMisAlig[3] = {0,0,0};
	204	Double_t angMisAlig[3] = {0,0,0};
	205	const Double_t *trans = transform.GetTranslation();
	206	TGeoRotation *rot;
	207	// check if the rotation we obtain is not NULL
	208	if (transform.GetRotation())
	209	{
	210	rot = transform.GetRotation();
	211	}
	212	else
	213	{
	214	rot = new TGeoRotation("rot");
	215	} // default constructor.
328e160e	216
	217	if (fUseUni) {
	218	GetUniMisAlign(cartMisAlig,angMisAlig);
	219	}
	220	else {
	221	if (!fUseGaus) {
	222	AliWarning("Neither uniform nor gausian distribution is set! Will use gausian...");
	223	}
	224	GetGausMisAlign(cartMisAlig,angMisAlig);
	225	}
	226
21dd83fc	227	TGeoTranslation newTrans(cartMisAlig[0] + trans[0], cartMisAlig[1] + trans[1], cartMisAlig[2] + trans[2]);
21dd83fc	228
21dd83fc	229	AliInfo(Form("Rotated by %f about Z axis.", angMisAlig[2]));
	230	rot->RotateX(angMisAlig[0]);
	231	rot->RotateY(angMisAlig[1]);
	232	rot->RotateZ(angMisAlig[2]);
	233
	234	return TGeoCombiTrans(newTrans, *rot);
	235	}
	236
21dd83fc	237	//______________________________________________________________________
	238	AliMUONGeometryTransformer *
	239	AliMUONGeometryMisAligner::MisAlign(const AliMUONGeometryTransformer *
	240	transformer, Bool_t verbose)
	241	{
a9aad96e	242	/// Takes the internal geometry module transformers, copies them
	243	/// and gets the Detection Elements from them.
	244	/// Calculates misalignment parameters and applies these
	245	/// to the local transform of the Detection Element
	246	/// Obtains the global transform by multiplying the module transformer
	247	/// transformation with the local transformation
	248	/// Applies the global transform to a new detection element
	249	/// Adds the new detection element to a new module transformer
	250	/// Adds the new module transformer to a new geometry transformer
	251	/// Returns the new geometry transformer
21dd83fc	252
	253
	254	AliMUONGeometryTransformer *newGeometryTransformer =
	255	new AliMUONGeometryTransformer(kTRUE);
	256	for (Int_t iMt = 0; iMt < transformer->GetNofModuleTransformers(); iMt++)
	257	{ // module transformers
	258
	259	const AliMUONGeometryModuleTransformer *kModuleTransformer =
	260	transformer->GetModuleTransformer(iMt, true);
	261
	262	AliMUONGeometryModuleTransformer *newModuleTransformer =
	263	new AliMUONGeometryModuleTransformer(iMt);
	264	newGeometryTransformer->AddModuleTransformer(newModuleTransformer);
	265
ef79ed3a	266	TGeoCombiTrans moduleTransform =
	267	TGeoCombiTrans(*kModuleTransformer->GetTransformation());
	268	TGeoCombiTrans *newModuleTransform = new TGeoCombiTrans(moduleTransform);
	269	// same module transform as the previous one
	270	// no mis align object created
	271	newModuleTransformer->SetTransformation(moduleTransform);
21dd83fc	272
	273	AliMUONGeometryStore *detElements =
	274	kModuleTransformer->GetDetElementStore();
	275
	276	if (verbose)
	277	AliInfo(Form
	278	("%i DEs in old GeometryStore %i",
	279	detElements->GetNofEntries(), iMt));
	280
	281	for (Int_t iDe = 0; iDe < detElements->GetNofEntries(); iDe++)
	282	{ // detection elements.
	283	AliMUONGeometryDetElement *detElement =
	284	(AliMUONGeometryDetElement *) detElements->GetEntry(iDe);
	285	if (!detElement)
	286	AliFatal("Detection element not found.");
	287
ef79ed3a	288	/// make a new detection element
21dd83fc	289	AliMUONGeometryDetElement *newDetElement =
21dd83fc	290	new AliMUONGeometryDetElement(detElement->GetId(),
ef79ed3a	291	detElement->GetVolumePath());
21dd83fc	292
ef79ed3a	293	// local transformation of this detection element.
	294	TGeoCombiTrans localTransform
	295	= TGeoCombiTrans(*detElement->GetLocalTransformation());
	296	TGeoCombiTrans newLocalTransform = MisAlign(localTransform);
	297	newDetElement->SetLocalTransformation(newLocalTransform);
21dd83fc	298
ef79ed3a	299	// global transformation
	300	TGeoHMatrix newGlobalTransform =
	301	AliMUONGeometryBuilder::Multiply(*newModuleTransform,
	302	newLocalTransform);
21dd83fc	303	newDetElement->SetGlobalTransformation(newGlobalTransform);
ef79ed3a	304
	305	// add this det element to module
	306	newModuleTransformer->GetDetElementStore()->Add(newDetElement->GetId(),
21dd83fc	307	newDetElement);
ef79ed3a	308	// Get delta transformation:
	309	// Tdelta = Tnew * Told.inverse
	310	TGeoHMatrix deltaTransform
	311	= AliMUONGeometryBuilder::Multiply(
	312	newGlobalTransform,
	313	detElement->GetGlobalTransformation()->Inverse());
	314
	315	// Create mis alignment matrix
	316	newGeometryTransformer
	317	->AddMisAlignDetElement(detElement->GetId(), deltaTransform);
21dd83fc	318	}
	319	if (verbose)
	320	AliInfo(Form("Added module transformer %i to the transformer", iMt));
	321	newGeometryTransformer->AddModuleTransformer(newModuleTransformer);
	322	}
	323	return newGeometryTransformer;
	324	}
	325
	326
	327
	328