[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(),
    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);

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