[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 "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),
    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(0)
{
  /// Standard constructor
  fDisplacementGenerator = new TRandom(0);
}

//______________________________________________________________________________
AliMUONGeometryMisAligner::AliMUONGeometryMisAligner(Double_t cartMisAligM, Double_t cartMisAligW, Double_t angMisAligM, Double_t angMisAligW)
  : TObject(), 
    fUseUni(kFALSE),
    fUseGaus(kTRUE),
    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(0)
{
  /// Standard constructor
  fDisplacementGenerator = new TRandom(0);
}

//______________________________________________________________________________
AliMUONGeometryMisAligner::AliMUONGeometryMisAligner(Double_t cartMisAlig, Double_t angMisAlig)
  : TObject(), 
    fUseUni(kTRUE),
    fUseGaus(kFALSE),
    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(0)
{
  /// Standard constructor
  fDisplacementGenerator = new TRandom(0);
}

//_____________________________________________________________________________
AliMUONGeometryMisAligner::AliMUONGeometryMisAligner()
  : TObject(), 
    fUseUni(kTRUE),
    fUseGaus(kFALSE),
    fCartXMisAligM(0.),
    fCartXMisAligW(0.),
    fCartYMisAligM(0.),
    fCartYMisAligW(0.),
    fAngMisAligM(0.),
    fAngMisAligW(0.),
    fXYAngMisAligFactor(0.0),
    fZCartMisAligFactor(0.0),
    fDisplacementGenerator(0)
{
  /// Default constructor
}

//______________________________________________________________________________
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;
  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);

      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 = 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"
21dd83fc	50	#include "AliMUONGeometryBuilder.h"
ef79ed3a	51
8c95578a	52	#include "AliMpExMap.h"
8c95578a	53
ef79ed3a	54	#include "AliLog.h"
ef79ed3a	55
328e160e	56	#include <TGeoMatrix.h>
21dd83fc	57	#include <TMath.h>
	58	#include <TRandom.h>
	59
a9aad96e	60	/// \cond CLASSIMP
21dd83fc	61	ClassImp(AliMUONGeometryMisAligner)
a9aad96e	62	/// \endcond
a9aad96e	63
328e160e	64	//______________________________________________________________________________
328e160e	65	AliMUONGeometryMisAligner::AliMUONGeometryMisAligner(Double_t cartXMisAligM, Double_t cartXMisAligW, Double_t cartYMisAligM, Double_t cartYMisAligW, Double_t angMisAligM, Double_t angMisAligW)
8395bff1	66	: TObject(),
	67	fUseUni(kFALSE),
	68	fUseGaus(kTRUE),
	69	fCartXMisAligM(cartXMisAligM),
	70	fCartXMisAligW(cartXMisAligW), // 0.5 mm. Perhaps this should go into AliMUONConstants.h ?
	71	fCartYMisAligM(cartYMisAligM),
	72	fCartYMisAligW(cartYMisAligW), // 0.5 mm. Perhaps this should go into AliMUONConstants.h ?
	73	fAngMisAligM(angMisAligM),
	74	fAngMisAligW(angMisAligW),
	75	fXYAngMisAligFactor(0.0),
	76	fZCartMisAligFactor(0.0),
	77	fDisplacementGenerator(0)
328e160e	78	{
328e160e	79	/// Standard constructor
328e160e	80	fDisplacementGenerator = new TRandom(0);
328e160e	81	}
	82
	83	//______________________________________________________________________________
	84	AliMUONGeometryMisAligner::AliMUONGeometryMisAligner(Double_t cartMisAligM, Double_t cartMisAligW, Double_t angMisAligM, Double_t angMisAligW)
8395bff1	85	: TObject(),
	86	fUseUni(kFALSE),
	87	fUseGaus(kTRUE),
	88	fCartXMisAligM(cartMisAligM),
	89	fCartXMisAligW(cartMisAligW), // 0.5 mm. Perhaps this should go into AliMUONConstants.h ?
	90	fCartYMisAligM(cartMisAligM),
	91	fCartYMisAligW(cartMisAligW), // 0.5 mm. Perhaps this should go into AliMUONConstants.h ?
	92	fAngMisAligM(angMisAligM),
	93	fAngMisAligW(angMisAligW),
	94	fXYAngMisAligFactor(0.0),
	95	fZCartMisAligFactor(0.0),
	96	fDisplacementGenerator(0)
328e160e	97	{
328e160e	98	/// Standard constructor
328e160e	99	fDisplacementGenerator = new TRandom(0);
328e160e	100	}
328e160e	101
21dd83fc	102	//______________________________________________________________________________
21dd83fc	103	AliMUONGeometryMisAligner::AliMUONGeometryMisAligner(Double_t cartMisAlig, Double_t angMisAlig)
8395bff1	104	: TObject(),
	105	fUseUni(kTRUE),
	106	fUseGaus(kFALSE),
	107	fCartXMisAligM(0.),
	108	fCartXMisAligW(cartMisAlig), // 0.5 mm. Perhaps this should go into AliMUONConstants.h ?
	109	fCartYMisAligM(0.),
	110	fCartYMisAligW(cartMisAlig), // 0.5 mm. Perhaps this should go into AliMUONConstants.h ?
	111	fAngMisAligM(0.),
	112	fAngMisAligW(angMisAlig),
	113	fXYAngMisAligFactor(0.0),
	114	fZCartMisAligFactor(0.0),
	115	fDisplacementGenerator(0)
21dd83fc	116	{
21dd83fc	117	/// Standard constructor
21dd83fc	118	fDisplacementGenerator = new TRandom(0);
	119	}
	120
	121	//_____________________________________________________________________________
	122	AliMUONGeometryMisAligner::AliMUONGeometryMisAligner()
8395bff1	123	: TObject(),
	124	fUseUni(kTRUE),
	125	fUseGaus(kFALSE),
	126	fCartXMisAligM(0.),
	127	fCartXMisAligW(0.),
	128	fCartYMisAligM(0.),
	129	fCartYMisAligW(0.),
	130	fAngMisAligM(0.),
	131	fAngMisAligW(0.),
	132	fXYAngMisAligFactor(0.0),
	133	fZCartMisAligFactor(0.0),
	134	fDisplacementGenerator(0)
21dd83fc	135	{
8395bff1	136	/// Default constructor
21dd83fc	137	}
21dd83fc	138
21dd83fc	139	//______________________________________________________________________________
	140	AliMUONGeometryMisAligner::~AliMUONGeometryMisAligner()
	141	{
	142	/// Destructor
	143
8395bff1	144	if (fDisplacementGenerator) delete fDisplacementGenerator;
21dd83fc	145	}
21dd83fc	146
490da820	147	//_________________________________________________________________________
21dd83fc	148	void
	149	AliMUONGeometryMisAligner::SetXYAngMisAligFactor(Double_t factor)
	150	{
328e160e	151	/// Set XY angular misalign factor
490da820	152
21dd83fc	153	if (TMath::Abs(factor) > 1.0 && factor > 0.)
	154	fXYAngMisAligFactor = factor;
	155	else
328e160e	156	AliError(Form("Invalid XY angular misalign factor, %d", factor));
	157	}
	158
	159	//_________________________________________________________________________
	160	void AliMUONGeometryMisAligner::SetZCartMisAligFactor(Double_t factor)
	161	{
	162	/// Set XY angular misalign factor
	163	if (TMath::Abs(factor)<1.0 && factor>0.)
	164	fZCartMisAligFactor = factor;
	165	else
	166	AliError(Form("Invalid Z cartesian misalign factor, %d", factor));
	167	}
	168
	169	//_________________________________________________________________________
a9aad96e	170	void AliMUONGeometryMisAligner::GetUniMisAlign(Double_t cartMisAlig[3], Double_t angMisAlig[3]) const
328e160e	171	{
328e160e	172	/// Misalign using uniform distribution
a9aad96e	173	/**
328e160e	174	misalign the centre of the local transformation
	175	rotation axes :
	176	fAngMisAlig[1,2,3] = [x,y,z]
	177	Assume that misalignment about the x and y axes (misalignment of z plane)
	178	is much smaller, since the entire detection plane has to be moved (the
	179	detection elements are on a support structure), while rotation of the x-y
	180	plane is more free.
	181	*/
	182	cartMisAlig[0] = fDisplacementGenerator->Uniform(-fCartXMisAligW+fCartXMisAligM, fCartXMisAligM+fCartXMisAligW);
	183	cartMisAlig[1] = fDisplacementGenerator->Uniform(-fCartYMisAligW+fCartYMisAligM, fCartYMisAligM+fCartYMisAligW);
	184	cartMisAlig[2] = fDisplacementGenerator->Uniform(-fZCartMisAligFactor(fCartXMisAligW+fCartXMisAligM), fZCartMisAligFactor(fCartXMisAligM+fCartXMisAligW));
	185
	186	angMisAlig[0] = fDisplacementGenerator->Uniform(-fXYAngMisAligFactor(fAngMisAligW+fAngMisAligM), fXYAngMisAligFactor(fAngMisAligM+fAngMisAligW));
	187	angMisAlig[1] = fDisplacementGenerator->Uniform(-fXYAngMisAligFactor(fAngMisAligW+fAngMisAligM), fXYAngMisAligFactor(fAngMisAligM+fAngMisAligW));
	188	angMisAlig[2] = fDisplacementGenerator->Uniform(-fAngMisAligW+fAngMisAligM, fAngMisAligM+fAngMisAligW); // degrees
	189	}
	190
	191	//_________________________________________________________________________
	192	void AliMUONGeometryMisAligner::GetGausMisAlign(Double_t cartMisAlig[3], Double_t angMisAlig[3]) const
	193	{
	194	/// Misalign using gaussian distribution
a9aad96e	195	/**
328e160e	196	misalign the centre of the local transformation
	197	rotation axes :
	198	fAngMisAlig[1,2,3] = [x,y,z]
	199	Assume that misalignment about the x and y axes (misalignment of z plane)
	200	is much smaller, since the entire detection plane has to be moved (the
	201	detection elements are on a support structure), while rotation of the x-y
	202	plane is more free.
	203	*/
	204	cartMisAlig[0] = fDisplacementGenerator->Gaus(fCartXMisAligM, fCartXMisAligW);
	205	cartMisAlig[1] = fDisplacementGenerator->Gaus(fCartYMisAligM, fCartYMisAligW);
	206	cartMisAlig[2] = fDisplacementGenerator->Gaus(fCartXMisAligM, fZCartMisAligFactor*fCartXMisAligW);
	207
	208	angMisAlig[0] = fDisplacementGenerator->Gaus(fAngMisAligM, fXYAngMisAligFactor*fAngMisAligW);
	209	angMisAlig[1] = fDisplacementGenerator->Gaus(fAngMisAligM, fXYAngMisAligFactor*fAngMisAligW);
	210	angMisAlig[2] = fDisplacementGenerator->Gaus(fAngMisAligM, fAngMisAligW); // degrees
21dd83fc	211	}
	212
	213	//_________________________________________________________________________
	214	TGeoCombiTrans AliMUONGeometryMisAligner::MisAlign(const TGeoCombiTrans & transform) const
	215	{
	216	/// Misalign given transformation and return the misaligned transformation
	217
	218	Double_t cartMisAlig[3] = {0,0,0};
	219	Double_t angMisAlig[3] = {0,0,0};
	220	const Double_t *trans = transform.GetTranslation();
	221	TGeoRotation *rot;
	222	// check if the rotation we obtain is not NULL
	223	if (transform.GetRotation())
	224	{
	225	rot = transform.GetRotation();
	226	}
	227	else
	228	{
	229	rot = new TGeoRotation("rot");
	230	} // default constructor.
328e160e	231
	232	if (fUseUni) {
	233	GetUniMisAlign(cartMisAlig,angMisAlig);
	234	}
	235	else {
	236	if (!fUseGaus) {
	237	AliWarning("Neither uniform nor gausian distribution is set! Will use gausian...");
	238	}
	239	GetGausMisAlign(cartMisAlig,angMisAlig);
	240	}
	241
21dd83fc	242	TGeoTranslation newTrans(cartMisAlig[0] + trans[0], cartMisAlig[1] + trans[1], cartMisAlig[2] + trans[2]);
21dd83fc	243
21dd83fc	244	AliInfo(Form("Rotated by %f about Z axis.", angMisAlig[2]));
	245	rot->RotateX(angMisAlig[0]);
	246	rot->RotateY(angMisAlig[1]);
	247	rot->RotateZ(angMisAlig[2]);
	248
	249	return TGeoCombiTrans(newTrans, *rot);
	250	}
	251
21dd83fc	252	//______________________________________________________________________
	253	AliMUONGeometryTransformer *
	254	AliMUONGeometryMisAligner::MisAlign(const AliMUONGeometryTransformer *
	255	transformer, Bool_t verbose)
	256	{
a9aad96e	257	/// Takes the internal geometry module transformers, copies them
	258	/// and gets the Detection Elements from them.
	259	/// Calculates misalignment parameters and applies these
	260	/// to the local transform of the Detection Element
	261	/// Obtains the global transform by multiplying the module transformer
	262	/// transformation with the local transformation
	263	/// Applies the global transform to a new detection element
	264	/// Adds the new detection element to a new module transformer
	265	/// Adds the new module transformer to a new geometry transformer
	266	/// Returns the new geometry transformer
21dd83fc	267
	268
	269	AliMUONGeometryTransformer *newGeometryTransformer =
	270	new AliMUONGeometryTransformer(kTRUE);
	271	for (Int_t iMt = 0; iMt < transformer->GetNofModuleTransformers(); iMt++)
	272	{ // module transformers
	273
	274	const AliMUONGeometryModuleTransformer *kModuleTransformer =
	275	transformer->GetModuleTransformer(iMt, true);
	276
	277	AliMUONGeometryModuleTransformer *newModuleTransformer =
	278	new AliMUONGeometryModuleTransformer(iMt);
	279	newGeometryTransformer->AddModuleTransformer(newModuleTransformer);
	280
ef79ed3a	281	TGeoCombiTrans moduleTransform =
	282	TGeoCombiTrans(*kModuleTransformer->GetTransformation());
	283	TGeoCombiTrans *newModuleTransform = new TGeoCombiTrans(moduleTransform);
	284	// same module transform as the previous one
	285	// no mis align object created
	286	newModuleTransformer->SetTransformation(moduleTransform);
21dd83fc	287
8c95578a	288	AliMpExMap *detElements = kModuleTransformer->GetDetElementStore();
21dd83fc	289
	290	if (verbose)
	291	AliInfo(Form
	292	("%i DEs in old GeometryStore %i",
8c95578a	293	detElements->GetSize(), iMt));
21dd83fc	294
8c95578a	295	for (Int_t iDe = 0; iDe < detElements->GetSize(); iDe++)
21dd83fc	296	{ // detection elements.
21dd83fc	297	AliMUONGeometryDetElement *detElement =
8c95578a	298	(AliMUONGeometryDetElement *) detElements->GetObject(iDe);
21dd83fc	299	if (!detElement)
	300	AliFatal("Detection element not found.");
	301
ef79ed3a	302	/// make a new detection element
21dd83fc	303	AliMUONGeometryDetElement *newDetElement =
21dd83fc	304	new AliMUONGeometryDetElement(detElement->GetId(),
ef79ed3a	305	detElement->GetVolumePath());
21dd83fc	306
ef79ed3a	307	// local transformation of this detection element.
	308	TGeoCombiTrans localTransform
	309	= TGeoCombiTrans(*detElement->GetLocalTransformation());
	310	TGeoCombiTrans newLocalTransform = MisAlign(localTransform);
	311	newDetElement->SetLocalTransformation(newLocalTransform);
21dd83fc	312
ef79ed3a	313	// global transformation
	314	TGeoHMatrix newGlobalTransform =
	315	AliMUONGeometryBuilder::Multiply(*newModuleTransform,
	316	newLocalTransform);
21dd83fc	317	newDetElement->SetGlobalTransformation(newGlobalTransform);
ef79ed3a	318
	319	// add this det element to module
	320	newModuleTransformer->GetDetElementStore()->Add(newDetElement->GetId(),
21dd83fc	321	newDetElement);
ef79ed3a	322	// Get delta transformation:
	323	// Tdelta = Tnew * Told.inverse
	324	TGeoHMatrix deltaTransform
	325	= AliMUONGeometryBuilder::Multiply(
	326	newGlobalTransform,
	327	detElement->GetGlobalTransformation()->Inverse());
	328
	329	// Create mis alignment matrix
	330	newGeometryTransformer
	331	->AddMisAlignDetElement(detElement->GetId(), deltaTransform);
21dd83fc	332	}
	333	if (verbose)
	334	AliInfo(Form("Added module transformer %i to the transformer", iMt));
	335	newGeometryTransformer->AddModuleTransformer(newModuleTransformer);
	336	}
	337	return newGeometryTransformer;
	338	}
	339
	340
	341
	342