[u/mrichter/AliRoot.git] / TRD / AliTRDgeometry.cxx

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

/* $Id$ */

///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  TRD geometry class                                                       //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////


#include <TError.h>

#include "AliRunLoader.h"
#include "AliTRDgeometry.h"
#include "AliTRDpadPlane.h"

#include "AliRun.h"
#include "AliTRD.h"
#include "AliTRDcalibDB.h"
#include "AliTRDCommonParam.h"

ClassImp(AliTRDgeometry)

//_____________________________________________________________________________

  //
  // The geometry constants
  //
  const Int_t   AliTRDgeometry::fgkNsect   = kNsect;
  const Int_t   AliTRDgeometry::fgkNplan   = kNplan;
  const Int_t   AliTRDgeometry::fgkNcham   = kNcham;
  const Int_t   AliTRDgeometry::fgkNdet    = kNdet;

  //
  // Dimensions of the detector
  //

  // Inner and outer radius of the mother volumes 
  const Float_t AliTRDgeometry::fgkRmin    = 294.0;
  const Float_t AliTRDgeometry::fgkRmax    = 368.0;

  // Upper and lower length of the mother volumes 
  const Float_t AliTRDgeometry::fgkZmax1   = 378.35; 
  const Float_t AliTRDgeometry::fgkZmax2   = 302.0; 

  // Parameter of the BTR mother volumes 
  const Float_t AliTRDgeometry::fgkSheight =  74.0; 
  const Float_t AliTRDgeometry::fgkSwidth1 =  99.613;
  const Float_t AliTRDgeometry::fgkSwidth2 = 125.707;
  const Float_t AliTRDgeometry::fgkSlenTR1 = 751.0;
  const Float_t AliTRDgeometry::fgkSlenTR2 = 313.5; 
  const Float_t AliTRDgeometry::fgkSlenTR3 = 159.5;  

  // The super module side plates
  const Float_t AliTRDgeometry::fgkSMpltT  =   0.2;
  const Float_t AliTRDgeometry::fgkSMgapT  =   0.5;  

  // Height of different chamber parts
  // Radiator
  const Float_t AliTRDgeometry::fgkCraH    =   4.8; 
  // Drift region
  const Float_t AliTRDgeometry::fgkCdrH    =   3.0;
  // Amplification region
  const Float_t AliTRDgeometry::fgkCamH    =   0.7;
  // Readout
  const Float_t AliTRDgeometry::fgkCroH    =   2.316;
  // Total height
  const Float_t AliTRDgeometry::fgkCH      = AliTRDgeometry::fgkCraH
                                           + AliTRDgeometry::fgkCdrH
                                           + AliTRDgeometry::fgkCamH
                                           + AliTRDgeometry::fgkCroH;  

  // Vertical spacing of the chambers
  const Float_t AliTRDgeometry::fgkVspace  =   1.784;

  // Horizontal spacing of the chambers
  const Float_t AliTRDgeometry::fgkHspace  =   2.0;

  // Thicknesses of different parts of the chamber frame
  // Lower aluminum frame
  const Float_t AliTRDgeometry::fgkCalT    =   0.3;
  // Lower G10 frame sides
  const Float_t AliTRDgeometry::fgkCclsT   =   0.3;
  // Lower G10 frame front
  const Float_t AliTRDgeometry::fgkCclfT   =   1.0;
  // Upper G10 frame
  const Float_t AliTRDgeometry::fgkCcuT    =   0.9;
  // Upper Al frame
  const Float_t AliTRDgeometry::fgkCauT    =   1.5;

  // Additional width of the readout chamber frames
  const Float_t AliTRDgeometry::fgkCroW    =   0.9;

  // Difference of outer chamber width and pad plane width
  //const Float_t AliTRDgeometry::fgkCpadW   =   1.0;
  const Float_t AliTRDgeometry::fgkCpadW   =   0.0;
  const Float_t AliTRDgeometry::fgkRpadW   =   1.0;

  //
  // Thickness of the the material layers
  //
  const Float_t AliTRDgeometry::fgkRaThick = 0.3646;  
  const Float_t AliTRDgeometry::fgkMyThick = 0.005;
  const Float_t AliTRDgeometry::fgkDrThick = AliTRDgeometry::fgkCdrH;    
  const Float_t AliTRDgeometry::fgkAmThick = AliTRDgeometry::fgkCamH;
  const Float_t AliTRDgeometry::fgkXeThick = AliTRDgeometry::fgkDrThick
                                           + AliTRDgeometry::fgkAmThick;
  const Float_t AliTRDgeometry::fgkCuThick = 0.001; 
  const Float_t AliTRDgeometry::fgkSuThick = 0.06; 
  const Float_t AliTRDgeometry::fgkFeThick = 0.0044; 
  const Float_t AliTRDgeometry::fgkCoThick = 0.02;
  const Float_t AliTRDgeometry::fgkWaThick = 0.02;

  //
  // Position of the material layers
  //
  const Float_t AliTRDgeometry::fgkRaZpos  = -1.50;
  const Float_t AliTRDgeometry::fgkMyZpos  =  0.895;
  const Float_t AliTRDgeometry::fgkDrZpos  =  2.4;
  const Float_t AliTRDgeometry::fgkAmZpos  =  0.0;
  const Float_t AliTRDgeometry::fgkCuZpos  = -0.9995;
  const Float_t AliTRDgeometry::fgkSuZpos  =  0.0000;
  const Float_t AliTRDgeometry::fgkFeZpos  =  0.0322;
  const Float_t AliTRDgeometry::fgkCoZpos  =  0.97;
  const Float_t AliTRDgeometry::fgkWaZpos  =  0.99;
  
  const Double_t AliTRDgeometry::fgkTime0Base = Rmin() + CraHght() + CdrHght() + CamHght()/2.;
  const Float_t  AliTRDgeometry::fgkTime0[6]  = { fgkTime0Base + 0 * (Cheight() + Cspace()), 
                                                  fgkTime0Base + 1 * (Cheight() + Cspace()), 
                                                  fgkTime0Base + 2 * (Cheight() + Cspace()), 
                                                  fgkTime0Base + 3 * (Cheight() + Cspace()), 
                                                  fgkTime0Base + 4 * (Cheight() + Cspace()), 
                                                  fgkTime0Base + 5 * (Cheight() + Cspace()) };

//_____________________________________________________________________________
AliTRDgeometry::AliTRDgeometry():AliGeometry()
{
  //
  // AliTRDgeometry default constructor
  //

  Init();
}

//_____________________________________________________________________________
AliTRDgeometry::~AliTRDgeometry()
{
  //
  // AliTRDgeometry destructor
  //
}

//_____________________________________________________________________________
void AliTRDgeometry::Init()
{
  //
  // Initializes the geometry parameter
  //
  // The maximum number of pads
  // and the position of pad 0,0,0 
  // 
  // chambers seen from the top:
  //     +----------------------------+
  //     |                            |
  //     |                            |      ^
  //     |                            |  rphi|
  //     |                            |      |
  //     |0                           |      | 
  //     +----------------------------+      +------>
  //                                             z 
  // chambers seen from the side:            ^
  //     +----------------------------+ drift|
  //     |0                           |      |
  //     |                            |      |
  //     +----------------------------+      +------>
  //                                             z
  //                                             
  // IMPORTANT: time bin 0 is now the first one in the drift region 
  // closest to the readout !!!
  //

  Int_t icham;
  Int_t iplan;
  Int_t isect;

  // The outer width of the chambers
  //
  // Changed with the introduction of 
  // the new layer 0. The old layer 6
  // is removed.
  fCwidth[0] =  90.4;
  fCwidth[1] =  94.8;
  fCwidth[2] =  99.3;
  fCwidth[3] = 103.7;
  fCwidth[4] = 108.1;
  fCwidth[5] = 112.6;
  // Old layer 6
  // fCwidth[5] = 117.0;

  // The outer lengths of the chambers
  // Includes the spacings between the chambers!
  // Changed with the introduction of 
  // the new layer 0. The old layer 6
  // is removed.
  Float_t length[kNplan][kNcham]   = { { 124.0, 124.0, 110.0, 124.0, 124.0 }
				     , { 124.0, 124.0, 110.0, 124.0, 124.0 }
                                     , { 131.0, 131.0, 110.0, 131.0, 131.0 }
                                     , { 138.0, 138.0, 110.0, 138.0, 138.0 }
                                     , { 145.0, 145.0, 110.0, 145.0, 145.0 }
				     , { 147.0, 147.0, 110.0, 147.0, 147.0 } };
  // Old layer 6
  //                                 , { 147.0, 147.0, 110.0, 147.0, 147.0 } };

  for (icham = 0; icham < kNcham; icham++) {
    for (iplan = 0; iplan < kNplan; iplan++) {
      fClength[iplan][icham]   = length[iplan][icham];
      fClengthPH[iplan][icham] = 0.0;
      fClengthRH[iplan][icham] = 0.0;
    }
  }

  // The rotation matrix elements
  Float_t phi = 0;
  for (isect = 0; isect < fgkNsect; isect++) {
    phi = -2.0 * TMath::Pi() /  (Float_t) fgkNsect * ((Float_t) isect + 0.5);
    fRotA11[isect] = TMath::Cos(phi);
    fRotA12[isect] = TMath::Sin(phi);
    fRotA21[isect] = TMath::Sin(phi);
    fRotA22[isect] = TMath::Cos(phi);
    phi = -1.0 * phi;
    fRotB11[isect] = TMath::Cos(phi);
    fRotB12[isect] = TMath::Sin(phi);
    fRotB21[isect] = TMath::Sin(phi);
    fRotB22[isect] = TMath::Cos(phi);
  }
 
}

//_____________________________________________________________________________
void AliTRDgeometry::CreateGeometry(Int_t* )
{
  //
  // Create TRD geometry
  //

}

//_____________________________________________________________________________
Bool_t AliTRDgeometry::Local2Global(Int_t idet, Double_t *local
                                   , Double_t *global) const
{
  //
  // Converts local pad-coordinates (row,col,time) into 
  // global ALICE reference frame coordinates (x,y,z)
  //

  Int_t icham = GetChamber(idet);    // Chamber info (0-4)
  Int_t isect = GetSector(idet);     // Sector info  (0-17)
  Int_t iplan = GetPlane(idet);      // Plane info   (0-5)

  return Local2Global(iplan,icham,isect,local,global);

}
 
//_____________________________________________________________________________
Bool_t AliTRDgeometry::Local2Global(Int_t iplan, Int_t icham, Int_t isect
                                  , Double_t *local, Double_t *global) const
{
  //
  // Converts local pad-coordinates (row,col,time) into 
  // global ALICE reference frame coordinates (x,y,z)
  //

  AliTRDCommonParam* commonParam = AliTRDCommonParam::Instance();
  if (!commonParam)
    return kFALSE;

  AliTRDcalibDB* calibration = AliTRDcalibDB::Instance();
  if (!calibration)
    return kFALSE;  
  
  AliTRDpadPlane *padPlane = commonParam->GetPadPlane(iplan,icham);

  // calculate (x,y,z) position in rotated chamber
  Int_t    row       = ((Int_t) local[0]);
  Int_t    col       = ((Int_t) local[1]);
  Float_t  timeSlice = local[2] + 0.5;
  Float_t  time0     = GetTime0(iplan);

  Int_t idet = GetDetector(iplan, icham, isect);

  Double_t  rot[3];
  rot[0] = time0 - (timeSlice - calibration->GetT0(idet, col, row))
      * calibration->GetVdrift(idet, col, row)/calibration->GetSamplingFrequency();
  rot[1] = padPlane->GetColPos(col) - 0.5 * padPlane->GetColSize(col);
  rot[2] = padPlane->GetRowPos(row) - 0.5 * padPlane->GetRowSize(row);

  // Rotate back to original position
  return RotateBack(idet,rot,global);

}

//_____________________________________________________________________________
Bool_t AliTRDgeometry::Global2Local(Int_t mode, Double_t *local, Double_t *global
                                   , Int_t* index) const
{
  //
  // Converts local pad-coordinates (row,col,time) into 
  // global ALICE reference frame coordinates (x,y,z)
  //
  // index[0] = plane number
  // index[1] = chamber number
  // index[2] = sector number
  //
  // mode=0  - local coordinate in y, z,             x - rotated global   
  // mode=2  - local coordinate in pad, and pad row, x - rotated global
  //

  //Int_t    idet    = GetDetector(iplan,icham,isect); // Detector number
  Int_t    idet      = GetDetector(index[0],index[1],index[2]); // Detector number
  Rotate(idet,global,local);
  if (mode==0) return kTRUE;
  //
  //  Float_t  row0      = par->GetRow0(iplan,icham,isect);
  //Float_t  col0      = par->GetCol0(iplan);
  //Float_t  time0     = GetTime0(iplan);
  //
  // mode 1 to be implemented later
  // calculate (x,y,z) position in time bin pad row pad
  //
  //rot[0] = time0 - (timeSlice - par->GetTimeBefore()) 
  //       * par->GetDriftVelocity()/par->GetSamplingFrequency();
  //rot[1] = col0  + padCol                    
  //       * par->GetColPadSize(iplan);
  //rot[2] = row0  + padRow                    
  //       * par->GetRowPadSize(iplan,icham,isect);

  return kTRUE;

}

//_____________________________________________________________________________
Bool_t AliTRDgeometry::Global2Detector(Double_t global[3], Int_t index[3])
{
  //  
  // input    = global position
  // output   = index
  // index[0] = plane number
  // index[1] = chamber number
  // index[2] = sector number
  //

  Float_t fi;
  //
  fi = TMath::ATan2(global[1],global[0]);
  if (fi<0) fi += 2*TMath::Pi();
  index[2] = Int_t(TMath::Nint((fi - GetAlpha()/2.)/GetAlpha()));
  //
  //
  Float_t locx = global[0] * fRotA11[index[2]] + global[1] * fRotA12[index[2]];  
  index[0] = 0;
  Float_t max = locx - GetTime0(0);
  for (Int_t iplane=1; iplane<fgkNplan;iplane++){
    Float_t dist = TMath::Abs(locx - GetTime0(iplane));
    if (dist < max){
      index[0] = iplane;
      max = dist;
    }
  }
  Float_t theta = TMath::ATan2(global[2],locx);
  index[1] = TMath::Nint(float(fgkNcham)*theta/(0.25*TMath::Pi()));
  return kTRUE;

}


//_____________________________________________________________________________
Bool_t AliTRDgeometry::Rotate(Int_t d, Double_t *pos, Double_t *rot) const
{
  //
  // Rotates all chambers in the position of sector 0 and transforms
  // the coordinates in the ALICE restframe <pos> into the 
  // corresponding local frame <rot>.
  //

  Int_t sector = GetSector(d);

  rot[0] =  pos[0] * fRotA11[sector] + pos[1] * fRotA12[sector];
  rot[1] = -pos[0] * fRotA21[sector] + pos[1] * fRotA22[sector];
  rot[2] =  pos[2];

  return kTRUE;

}

//_____________________________________________________________________________
Bool_t AliTRDgeometry::RotateBack(Int_t d, Double_t *rot, Double_t *pos) const
{
  //
  // Rotates a chambers from the position of sector 0 into its
  // original position and transforms the corresponding local frame 
  // coordinates <rot> into the coordinates of the ALICE restframe <pos>.
  //

  Int_t sector = GetSector(d);

  pos[0] =  rot[0] * fRotB11[sector] + rot[1] * fRotB12[sector];
  pos[1] = -rot[0] * fRotB21[sector] + rot[1] * fRotB22[sector];
  pos[2] =  rot[2];

  return kTRUE;

}

//_____________________________________________________________________________
Int_t AliTRDgeometry::GetDetectorSec(Int_t p, Int_t c)
{
  //
  // Convert plane / chamber into detector number for one single sector
  //

  return (p + c * fgkNplan);

}

//_____________________________________________________________________________
Int_t AliTRDgeometry::GetDetector(Int_t p, Int_t c, Int_t s)
{
  //
  // Convert plane / chamber / sector into detector number
  //

  return (p + c * fgkNplan + s * fgkNplan * fgkNcham);

}

//_____________________________________________________________________________
Int_t AliTRDgeometry::GetPlane(Int_t d) const
{
  //
  // Reconstruct the plane number from the detector number
  //

  return ((Int_t) (d % fgkNplan));

}

//_____________________________________________________________________________
Int_t AliTRDgeometry::GetChamber(Int_t d) const
{
  //
  // Reconstruct the chamber number from the detector number
  //

  return ((Int_t) (d % (fgkNplan * fgkNcham)) / fgkNplan);

}

//_____________________________________________________________________________
Int_t AliTRDgeometry::GetSector(Int_t d) const
{
  //
  // Reconstruct the sector number from the detector number
  //

  return ((Int_t) (d / (fgkNplan * fgkNcham)));

}

//_____________________________________________________________________________
AliTRDgeometry* AliTRDgeometry::GetGeometry(AliRunLoader* runLoader)
{
  //
  // load the geometry from the galice file
  //

  if (!runLoader) runLoader = AliRunLoader::GetRunLoader();
  if (!runLoader) {
    ::Error("AliTRDgeometry::GetGeometry", "No run loader");
    return NULL;
  }

  TDirectory* saveDir = gDirectory;
  runLoader->CdGAFile();

  // Try from the galice.root file
  AliTRDgeometry* geom = (AliTRDgeometry*) gDirectory->Get("TRDgeometry");

  if (!geom) {
    // It is not in the file, try to get it from gAlice, 
    // which corresponds to the run loader 
    AliTRD * trd = (AliTRD*)runLoader->GetAliRun()->GetDetector("TRD");
    geom = trd->GetGeometry();
  }
  if (!geom) ::Error("AliTRDgeometry::GetGeometry", "Geometry not found");

  saveDir->cd();
  return geom;
}
Commit	Line	Data
f7336fa3	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	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 purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
afc51ac2	16	/* $Id$ */
f7336fa3	17
	18	///////////////////////////////////////////////////////////////////////////////
	19	// //
	20	// TRD geometry class //
	21	// //
	22	///////////////////////////////////////////////////////////////////////////////
	23
793ff80c	24
bdbb05bb	25	#include <TError.h>
	26
	27	#include "AliRunLoader.h"
f7336fa3	28	#include "AliTRDgeometry.h"
a5cadd36	29	#include "AliTRDpadPlane.h"
f7336fa3	30
ecb36af7	31	#include "AliRun.h"
ecb36af7	32	#include "AliTRD.h"
3551db50	33	#include "AliTRDcalibDB.h"
3551db50	34	#include "AliTRDCommonParam.h"
ecb36af7	35
f7336fa3	36	ClassImp(AliTRDgeometry)
f7336fa3	37
793ff80c	38	//_____________________________________________________________________________
	39
	40	//
	41	// The geometry constants
	42	//
	43	const Int_t AliTRDgeometry::fgkNsect = kNsect;
	44	const Int_t AliTRDgeometry::fgkNplan = kNplan;
	45	const Int_t AliTRDgeometry::fgkNcham = kNcham;
	46	const Int_t AliTRDgeometry::fgkNdet = kNdet;
	47
	48	//
	49	// Dimensions of the detector
	50	//
0a770ac9	51
0a770ac9	52	// Inner and outer radius of the mother volumes
793ff80c	53	const Float_t AliTRDgeometry::fgkRmin = 294.0;
	54	const Float_t AliTRDgeometry::fgkRmax = 368.0;
	55
0a770ac9	56	// Upper and lower length of the mother volumes
793ff80c	57	const Float_t AliTRDgeometry::fgkZmax1 = 378.35;
	58	const Float_t AliTRDgeometry::fgkZmax2 = 302.0;
	59
0a770ac9	60	// Parameter of the BTR mother volumes
793ff80c	61	const Float_t AliTRDgeometry::fgkSheight = 74.0;
	62	const Float_t AliTRDgeometry::fgkSwidth1 = 99.613;
	63	const Float_t AliTRDgeometry::fgkSwidth2 = 125.707;
	64	const Float_t AliTRDgeometry::fgkSlenTR1 = 751.0;
	65	const Float_t AliTRDgeometry::fgkSlenTR2 = 313.5;
	66	const Float_t AliTRDgeometry::fgkSlenTR3 = 159.5;
	67
73ae7b59	68	// The super module side plates
287c5d50	69	const Float_t AliTRDgeometry::fgkSMpltT = 0.2;
287c5d50	70	const Float_t AliTRDgeometry::fgkSMgapT = 0.5;
73ae7b59	71
0a770ac9	72	// Height of different chamber parts
	73	// Radiator
	74	const Float_t AliTRDgeometry::fgkCraH = 4.8;
	75	// Drift region
	76	const Float_t AliTRDgeometry::fgkCdrH = 3.0;
	77	// Amplification region
	78	const Float_t AliTRDgeometry::fgkCamH = 0.7;
	79	// Readout
73ae7b59	80	const Float_t AliTRDgeometry::fgkCroH = 2.316;
0a770ac9	81	// Total height
	82	const Float_t AliTRDgeometry::fgkCH = AliTRDgeometry::fgkCraH
	83	+ AliTRDgeometry::fgkCdrH
	84	+ AliTRDgeometry::fgkCamH
	85	+ AliTRDgeometry::fgkCroH;
	86
	87	// Vertical spacing of the chambers
73ae7b59	88	const Float_t AliTRDgeometry::fgkVspace = 1.784;
0a770ac9	89
	90	// Horizontal spacing of the chambers
	91	const Float_t AliTRDgeometry::fgkHspace = 2.0;
	92
	93	// Thicknesses of different parts of the chamber frame
	94	// Lower aluminum frame
	95	const Float_t AliTRDgeometry::fgkCalT = 0.3;
	96	// Lower G10 frame sides
	97	const Float_t AliTRDgeometry::fgkCclsT = 0.3;
	98	// Lower G10 frame front
	99	const Float_t AliTRDgeometry::fgkCclfT = 1.0;
	100	// Upper G10 frame
	101	const Float_t AliTRDgeometry::fgkCcuT = 0.9;
	102	// Upper Al frame
	103	const Float_t AliTRDgeometry::fgkCauT = 1.5;
	104
	105	// Additional width of the readout chamber frames
	106	const Float_t AliTRDgeometry::fgkCroW = 0.9;
	107
	108	// Difference of outer chamber width and pad plane width
73ae7b59	109	//const Float_t AliTRDgeometry::fgkCpadW = 1.0;
73ae7b59	110	const Float_t AliTRDgeometry::fgkCpadW = 0.0;
de6df1b1	111	const Float_t AliTRDgeometry::fgkRpadW = 1.0;
793ff80c	112
	113	//
	114	// Thickness of the the material layers
	115	//
db30bf0f	116	const Float_t AliTRDgeometry::fgkRaThick = 0.3646;
793ff80c	117	const Float_t AliTRDgeometry::fgkMyThick = 0.005;
0a770ac9	118	const Float_t AliTRDgeometry::fgkDrThick = AliTRDgeometry::fgkCdrH;
	119	const Float_t AliTRDgeometry::fgkAmThick = AliTRDgeometry::fgkCamH;
	120	const Float_t AliTRDgeometry::fgkXeThick = AliTRDgeometry::fgkDrThick
	121	+ AliTRDgeometry::fgkAmThick;
793ff80c	122	const Float_t AliTRDgeometry::fgkCuThick = 0.001;
	123	const Float_t AliTRDgeometry::fgkSuThick = 0.06;
	124	const Float_t AliTRDgeometry::fgkFeThick = 0.0044;
	125	const Float_t AliTRDgeometry::fgkCoThick = 0.02;
db30bf0f	126	const Float_t AliTRDgeometry::fgkWaThick = 0.02;
793ff80c	127
	128	//
	129	// Position of the material layers
	130	//
0a770ac9	131	const Float_t AliTRDgeometry::fgkRaZpos = -1.50;
	132	const Float_t AliTRDgeometry::fgkMyZpos = 0.895;
	133	const Float_t AliTRDgeometry::fgkDrZpos = 2.4;
	134	const Float_t AliTRDgeometry::fgkAmZpos = 0.0;
	135	const Float_t AliTRDgeometry::fgkCuZpos = -0.9995;
793ff80c	136	const Float_t AliTRDgeometry::fgkSuZpos = 0.0000;
0a770ac9	137	const Float_t AliTRDgeometry::fgkFeZpos = 0.0322;
	138	const Float_t AliTRDgeometry::fgkCoZpos = 0.97;
	139	const Float_t AliTRDgeometry::fgkWaZpos = 0.99;
3551db50	140
	141	const Double_t AliTRDgeometry::fgkTime0Base = Rmin() + CraHght() + CdrHght() + CamHght()/2.;
	142	const Float_t AliTRDgeometry::fgkTime0[6] = { fgkTime0Base + 0 * (Cheight() + Cspace()),
	143	fgkTime0Base + 1 * (Cheight() + Cspace()),
	144	fgkTime0Base + 2 * (Cheight() + Cspace()),
	145	fgkTime0Base + 3 * (Cheight() + Cspace()),
	146	fgkTime0Base + 4 * (Cheight() + Cspace()),
	147	fgkTime0Base + 5 * (Cheight() + Cspace()) };
793ff80c	148
f7336fa3	149	//_____________________________________________________________________________
	150	AliTRDgeometry::AliTRDgeometry():AliGeometry()
	151	{
	152	//
	153	// AliTRDgeometry default constructor
	154	//
	155
	156	Init();
f7336fa3	157	}
	158
	159	//_____________________________________________________________________________
	160	AliTRDgeometry::~AliTRDgeometry()
	161	{
8230f242	162	//
	163	// AliTRDgeometry destructor
	164	//
f7336fa3	165	}
	166
	167	//_____________________________________________________________________________
	168	void AliTRDgeometry::Init()
	169	{
	170	//
	171	// Initializes the geometry parameter
	172	//
f7336fa3	173	// The maximum number of pads
	174	// and the position of pad 0,0,0
	175	//
	176	// chambers seen from the top:
	177	// +----------------------------+
	178	// \| \|
793ff80c	179	// \| \| ^
	180	// \| \| rphi\|
	181	// \| \| \|
	182	// \|0 \| \|
	183	// +----------------------------+ +------>
f7336fa3	184	// z
793ff80c	185	// chambers seen from the side: ^
	186	// +----------------------------+ drift\|
	187	// \|0 \| \|
	188	// \| \| \|
	189	// +----------------------------+ +------>
f7336fa3	190	// z
f7336fa3	191	//
a2b90f83	192	// IMPORTANT: time bin 0 is now the first one in the drift region
a2b90f83	193	// closest to the readout !!!
793ff80c	194	//
f7336fa3	195
0a770ac9	196	Int_t icham;
	197	Int_t iplan;
	198	Int_t isect;
	199
	200	// The outer width of the chambers
e0d47c25	201	//
	202	// Changed with the introduction of
	203	// the new layer 0. The old layer 6
	204	// is removed.
287c5d50	205	fCwidth[0] = 90.4;
e0d47c25	206	fCwidth[1] = 94.8;
	207	fCwidth[2] = 99.3;
	208	fCwidth[3] = 103.7;
	209	fCwidth[4] = 108.1;
	210	fCwidth[5] = 112.6;
	211	// Old layer 6
	212	// fCwidth[5] = 117.0;
0a770ac9	213
0a770ac9	214	// The outer lengths of the chambers
73ae7b59	215	// Includes the spacings between the chambers!
e0d47c25	216	// Changed with the introduction of
	217	// the new layer 0. The old layer 6
	218	// is removed.
8737e16f	219	Float_t length[kNplan][kNcham] = { { 124.0, 124.0, 110.0, 124.0, 124.0 }
e0d47c25	220	, { 124.0, 124.0, 110.0, 124.0, 124.0 }
8737e16f	221	, { 131.0, 131.0, 110.0, 131.0, 131.0 }
	222	, { 138.0, 138.0, 110.0, 138.0, 138.0 }
	223	, { 145.0, 145.0, 110.0, 145.0, 145.0 }
e0d47c25	224	, { 147.0, 147.0, 110.0, 147.0, 147.0 } };
	225	// Old layer 6
	226	// , { 147.0, 147.0, 110.0, 147.0, 147.0 } };
0a770ac9	227
	228	for (icham = 0; icham < kNcham; icham++) {
	229	for (iplan = 0; iplan < kNplan; iplan++) {
	230	fClength[iplan][icham] = length[iplan][icham];
	231	fClengthPH[iplan][icham] = 0.0;
	232	fClengthRH[iplan][icham] = 0.0;
	233	}
	234	}
	235
793ff80c	236	// The rotation matrix elements
	237	Float_t phi = 0;
	238	for (isect = 0; isect < fgkNsect; isect++) {
5443e65e	239	phi = -2.0 * TMath::Pi() / (Float_t) fgkNsect * ((Float_t) isect + 0.5);
793ff80c	240	fRotA11[isect] = TMath::Cos(phi);
	241	fRotA12[isect] = TMath::Sin(phi);
	242	fRotA21[isect] = TMath::Sin(phi);
	243	fRotA22[isect] = TMath::Cos(phi);
	244	phi = -1.0 * phi;
	245	fRotB11[isect] = TMath::Cos(phi);
	246	fRotB12[isect] = TMath::Sin(phi);
	247	fRotB21[isect] = TMath::Sin(phi);
	248	fRotB22[isect] = TMath::Cos(phi);
	249	}
	250
	251	}
	252
f7336fa3	253	//_____________________________________________________________________________
73ae7b59	254	void AliTRDgeometry::CreateGeometry(Int_t* )
f7336fa3	255	{
f7336fa3	256	//
0a770ac9	257	// Create TRD geometry
0a770ac9	258	//
f7336fa3	259
	260	}
	261
	262	//_____________________________________________________________________________
a5cadd36	263	Bool_t AliTRDgeometry::Local2Global(Int_t idet, Double_t *local
dde59437	264	, Double_t *global) const
f7336fa3	265	{
	266	//
	267	// Converts local pad-coordinates (row,col,time) into
	268	// global ALICE reference frame coordinates (x,y,z)
	269	//
	270
793ff80c	271	Int_t icham = GetChamber(idet); // Chamber info (0-4)
	272	Int_t isect = GetSector(idet); // Sector info (0-17)
	273	Int_t iplan = GetPlane(idet); // Plane info (0-5)
f7336fa3	274
dde59437	275	return Local2Global(iplan,icham,isect,local,global);
f7336fa3	276
	277	}
	278
	279	//_____________________________________________________________________________
	280	Bool_t AliTRDgeometry::Local2Global(Int_t iplan, Int_t icham, Int_t isect
dde59437	281	, Double_t local, Double_t global) const
f7336fa3	282	{
	283	//
	284	// Converts local pad-coordinates (row,col,time) into
	285	// global ALICE reference frame coordinates (x,y,z)
	286	//
	287
3551db50	288	AliTRDCommonParam* commonParam = AliTRDCommonParam::Instance();
	289	if (!commonParam)
	290	return kFALSE;
5443e65e	291
3551db50	292	AliTRDcalibDB* calibration = AliTRDcalibDB::Instance();
	293	if (!calibration)
	294	return kFALSE;
	295
	296	AliTRDpadPlane *padPlane = commonParam->GetPadPlane(iplan,icham);
f7336fa3	297
a5cadd36	298	// calculate (x,y,z) position in rotated chamber
	299	Int_t row = ((Int_t) local[0]);
	300	Int_t col = ((Int_t) local[1]);
	301	Float_t timeSlice = local[2] + 0.5;
3551db50	302	Float_t time0 = GetTime0(iplan);
f7336fa3	303
7754cd1f	304	Int_t idet = GetDetector(iplan, icham, isect);
7754cd1f	305
a5cadd36	306	Double_t rot[3];
7754cd1f	307	rot[0] = time0 - (timeSlice - calibration->GetT0(idet, col, row))
7754cd1f	308	* calibration->GetVdrift(idet, col, row)/calibration->GetSamplingFrequency();
a5cadd36	309	rot[1] = padPlane->GetColPos(col) - 0.5 * padPlane->GetColSize(col);
a5cadd36	310	rot[2] = padPlane->GetRowPos(row) - 0.5 * padPlane->GetRowSize(row);
f7336fa3	311
	312	// Rotate back to original position
	313	return RotateBack(idet,rot,global);
	314
	315	}
	316
3d7b6a24	317	//_____________________________________________________________________________
a5cadd36	318	Bool_t AliTRDgeometry::Global2Local(Int_t mode, Double_t local, Double_t global
7754cd1f	319	, Int_t* index) const
3d7b6a24	320	{
	321	//
	322	// Converts local pad-coordinates (row,col,time) into
	323	// global ALICE reference frame coordinates (x,y,z)
	324	//
e0d47c25	325	// index[0] = plane number
	326	// index[1] = chamber number
	327	// index[2] = sector number
3d7b6a24	328	//
	329	// mode=0 - local coordinate in y, z, x - rotated global
	330	// mode=2 - local coordinate in pad, and pad row, x - rotated global
	331	//
e0d47c25	332
3d7b6a24	333	//Int_t idet = GetDetector(iplan,icham,isect); // Detector number
	334	Int_t idet = GetDetector(index[0],index[1],index[2]); // Detector number
	335	Rotate(idet,global,local);
	336	if (mode==0) return kTRUE;
	337	//
	338	// Float_t row0 = par->GetRow0(iplan,icham,isect);
	339	//Float_t col0 = par->GetCol0(iplan);
3551db50	340	//Float_t time0 = GetTime0(iplan);
3d7b6a24	341	//
	342	// mode 1 to be implemented later
	343	// calculate (x,y,z) position in time bin pad row pad
	344	//
	345	//rot[0] = time0 - (timeSlice - par->GetTimeBefore())
ccb4315c	346	// * par->GetDriftVelocity()/par->GetSamplingFrequency();
3d7b6a24	347	//rot[1] = col0 + padCol
	348	// * par->GetColPadSize(iplan);
	349	//rot[2] = row0 + padRow
	350	// * par->GetRowPadSize(iplan,icham,isect);
	351
	352	return kTRUE;
	353
	354	}
	355
a5cadd36	356	//_____________________________________________________________________________
3551db50	357	Bool_t AliTRDgeometry::Global2Detector(Double_t global[3], Int_t index[3])
3d7b6a24	358	{
3d7b6a24	359	//
e0d47c25	360	// input = global position
	361	// output = index
	362	// index[0] = plane number
	363	// index[1] = chamber number
	364	// index[2] = sector number
3d7b6a24	365	//
e0d47c25	366
3d7b6a24	367	Float_t fi;
	368	//
	369	fi = TMath::ATan2(global[1],global[0]);
	370	if (fi<0) fi += 2*TMath::Pi();
	371	index[2] = Int_t(TMath::Nint((fi - GetAlpha()/2.)/GetAlpha()));
	372	//
	373	//
	374	Float_t locx = global[0] * fRotA11[index[2]] + global[1] * fRotA12[index[2]];
	375	index[0] = 0;
3551db50	376	Float_t max = locx - GetTime0(0);
3d7b6a24	377	for (Int_t iplane=1; iplane<fgkNplan;iplane++){
3551db50	378	Float_t dist = TMath::Abs(locx - GetTime0(iplane));
3d7b6a24	379	if (dist < max){
	380	index[0] = iplane;
	381	max = dist;
	382	}
	383	}
	384	Float_t theta = TMath::ATan2(global[2],locx);
	385	index[1] = TMath::Nint(float(fgkNcham)theta/(0.25TMath::Pi()));
	386	return kTRUE;
	387
	388	}
	389
	390
f7336fa3	391	//_____________________________________________________________________________
a5cadd36	392	Bool_t AliTRDgeometry::Rotate(Int_t d, Double_t pos, Double_t rot) const
f7336fa3	393	{
	394	//
	395	// Rotates all chambers in the position of sector 0 and transforms
	396	// the coordinates in the ALICE restframe <pos> into the
	397	// corresponding local frame <rot>.
	398	//
	399
793ff80c	400	Int_t sector = GetSector(d);
f7336fa3	401
793ff80c	402	rot[0] = pos[0] * fRotA11[sector] + pos[1] * fRotA12[sector];
793ff80c	403	rot[1] = -pos[0] * fRotA21[sector] + pos[1] * fRotA22[sector];
f7336fa3	404	rot[2] = pos[2];
	405
	406	return kTRUE;
	407
	408	}
	409
	410	//_____________________________________________________________________________
a5cadd36	411	Bool_t AliTRDgeometry::RotateBack(Int_t d, Double_t rot, Double_t pos) const
f7336fa3	412	{
	413	//
	414	// Rotates a chambers from the position of sector 0 into its
	415	// original position and transforms the corresponding local frame
	416	// coordinates <rot> into the coordinates of the ALICE restframe <pos>.
	417	//
	418
793ff80c	419	Int_t sector = GetSector(d);
f7336fa3	420
793ff80c	421	pos[0] = rot[0] * fRotB11[sector] + rot[1] * fRotB12[sector];
793ff80c	422	pos[1] = -rot[0] * fRotB21[sector] + rot[1] * fRotB22[sector];
6f1e466d	423	pos[2] = rot[2];
f7336fa3	424
	425	return kTRUE;
	426
	427	}
	428
	429	//_____________________________________________________________________________
3551db50	430	Int_t AliTRDgeometry::GetDetectorSec(Int_t p, Int_t c)
0a770ac9	431	{
	432	//
	433	// Convert plane / chamber into detector number for one single sector
	434	//
	435
	436	return (p + c * fgkNplan);
	437
	438	}
	439
	440	//_____________________________________________________________________________
3551db50	441	Int_t AliTRDgeometry::GetDetector(Int_t p, Int_t c, Int_t s)
f7336fa3	442	{
	443	//
	444	// Convert plane / chamber / sector into detector number
	445	//
	446
793ff80c	447	return (p + c * fgkNplan + s * fgkNplan * fgkNcham);
f7336fa3	448
	449	}
	450
	451	//_____________________________________________________________________________
afc51ac2	452	Int_t AliTRDgeometry::GetPlane(Int_t d) const
f7336fa3	453	{
	454	//
	455	// Reconstruct the plane number from the detector number
	456	//
	457
793ff80c	458	return ((Int_t) (d % fgkNplan));
f7336fa3	459
	460	}
	461
	462	//_____________________________________________________________________________
afc51ac2	463	Int_t AliTRDgeometry::GetChamber(Int_t d) const
f7336fa3	464	{
	465	//
	466	// Reconstruct the chamber number from the detector number
	467	//
	468
793ff80c	469	return ((Int_t) (d % (fgkNplan * fgkNcham)) / fgkNplan);
f7336fa3	470
	471	}
	472
	473	//_____________________________________________________________________________
afc51ac2	474	Int_t AliTRDgeometry::GetSector(Int_t d) const
f7336fa3	475	{
	476	//
	477	// Reconstruct the sector number from the detector number
	478	//
	479
793ff80c	480	return ((Int_t) (d / (fgkNplan * fgkNcham)));
f7336fa3	481
	482	}
	483
bdbb05bb	484	//_____________________________________________________________________________
	485	AliTRDgeometry* AliTRDgeometry::GetGeometry(AliRunLoader* runLoader)
	486	{
	487	//
	488	// load the geometry from the galice file
	489	//
	490
	491	if (!runLoader) runLoader = AliRunLoader::GetRunLoader();
	492	if (!runLoader) {
	493	::Error("AliTRDgeometry::GetGeometry", "No run loader");
	494	return NULL;
	495	}
	496
	497	TDirectory* saveDir = gDirectory;
	498	runLoader->CdGAFile();
	499
ecb36af7	500	// Try from the galice.root file
bdbb05bb	501	AliTRDgeometry* geom = (AliTRDgeometry*) gDirectory->Get("TRDgeometry");
ecb36af7	502
	503	if (!geom) {
	504	// It is not in the file, try to get it from gAlice,
	505	// which corresponds to the run loader
	506	AliTRD * trd = (AliTRD*)runLoader->GetAliRun()->GetDetector("TRD");
	507	geom = trd->GetGeometry();
	508	}
bdbb05bb	509	if (!geom) ::Error("AliTRDgeometry::GetGeometry", "Geometry not found");
	510
	511	saveDir->cd();
	512	return geom;
	513	}