[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 "AliTRDparameter.h"
#include "AliTRDpadPlane.h"

#include "AliRun.h"
#include "AliTRD.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;

//_____________________________________________________________________________
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
                                   , AliTRDparameter *par) 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,par);

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

  if (!par) {
    Error("Local2Global","No parameter defined\n");
    return kFALSE;
  }

  AliTRDpadPlane *padPlane = par->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     = par->GetTime0(iplan);

  Double_t  rot[3];
  rot[0] = time0 - (timeSlice - par->GetTimeBefore()) 
         * par->GetDriftVelocity()/par->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
  Int_t idet = GetDetector(iplan,icham,isect); 
  return RotateBack(idet,rot,global);

}

//_____________________________________________________________________________
Bool_t AliTRDgeometry::Global2Local(Int_t mode, Double_t *local, Double_t *global
                                   , Int_t* index,  AliTRDparameter *par) 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
  //

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