[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 "AliTRDgeometry.h"
#include "AliTRDparameter.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;  

  // 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    =   2.0;
  // 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  =   2.1;

  // 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::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
  fCwidth[0] =  95.6;
  fCwidth[1] = 100.1;
  fCwidth[2] = 104.5;
  fCwidth[3] = 108.9;
  fCwidth[4] = 113.4;
  fCwidth[5] = 117.8;

  // The outer lengths of the chambers
  Float_t length[kNplan][kNcham]   = { { 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 }
                                     , { 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 *idtmed)
{
  //
  // Create TRD geometry
  //

}

//_____________________________________________________________________________
Bool_t AliTRDgeometry::Local2Global(Int_t idet, Float_t *local
                                   , Float_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
                                  , Float_t *local, Float_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;
  }

  Int_t    idet      = GetDetector(iplan,icham,isect); // Detector number

  Float_t  padRow    = local[0]+0.5;                   // Pad Row position
  Float_t  padCol    = local[1]+0.5;                   // Pad Column position
  Float_t  timeSlice = local[2]+0.5;                   // Time "position"

  Float_t  row0      = par->GetRow0(iplan,icham,isect);
  Float_t  col0      = par->GetCol0(iplan);
  Float_t  time0     = par->GetTime0(iplan);

  Float_t  rot[3];

  // calculate (x,y,z) position in rotated chamber
  rot[0] = time0 - (timeSlice - par->GetTimeBefore()) 
         * par->GetTimeBinSize();
  rot[1] = col0  + padCol                    
         * par->GetColPadSize(iplan);
  rot[2] = row0  + padRow                    
         * par->GetRowPadSize(iplan,icham,isect);

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

}

//_____________________________________________________________________________
Bool_t AliTRDgeometry::Rotate(Int_t d, Float_t *pos, Float_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, Float_t *rot, Float_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(const Int_t p, const Int_t c) const
{
  //
  // Convert plane / chamber into detector number for one single sector
  //

  return (p + c * fgkNplan);

}

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

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

}

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

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

}

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

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

}

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

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

}

//_____________________________________________________________________________
void AliTRDgeometry::SetOldGeometry()
{
  //
  // Use the old chamber lengths
  //

  Int_t icham;
  Int_t iplan;

  Float_t length[kNplan][kNcham]   = { { 123.5, 123.5, 110.0, 123.5, 123.5 }
				     , { 131.0, 131.0, 110.0, 131.0, 131.0 }
				     , { 134.5, 138.5, 110.0, 138.5, 134.5 }
				     , { 142.0, 146.0, 110.0, 146.0, 142.0 }
				     , { 142.0, 153.0, 110.0, 153.0, 142.0 }
                                     , { 134.0, 160.5, 110.0, 160.5, 134.0 } };

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

}
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
88cb7938	16	/* $Id$ */
f7336fa3	17
	18	///////////////////////////////////////////////////////////////////////////////
	19	// //
	20	// TRD geometry class //
	21	// //
	22	///////////////////////////////////////////////////////////////////////////////
	23
793ff80c	24
f7336fa3	25	#include "AliTRDgeometry.h"
5443e65e	26	#include "AliTRDparameter.h"
f7336fa3	27
	28	ClassImp(AliTRDgeometry)
	29
793ff80c	30	//_____________________________________________________________________________
	31
	32	//
	33	// The geometry constants
	34	//
	35	const Int_t AliTRDgeometry::fgkNsect = kNsect;
	36	const Int_t AliTRDgeometry::fgkNplan = kNplan;
	37	const Int_t AliTRDgeometry::fgkNcham = kNcham;
	38	const Int_t AliTRDgeometry::fgkNdet = kNdet;
	39
	40	//
	41	// Dimensions of the detector
	42	//
0a770ac9	43
0a770ac9	44	// Inner and outer radius of the mother volumes
793ff80c	45	const Float_t AliTRDgeometry::fgkRmin = 294.0;
	46	const Float_t AliTRDgeometry::fgkRmax = 368.0;
	47
0a770ac9	48	// Upper and lower length of the mother volumes
793ff80c	49	const Float_t AliTRDgeometry::fgkZmax1 = 378.35;
	50	const Float_t AliTRDgeometry::fgkZmax2 = 302.0;
	51
0a770ac9	52	// Parameter of the BTR mother volumes
793ff80c	53	const Float_t AliTRDgeometry::fgkSheight = 74.0;
	54	const Float_t AliTRDgeometry::fgkSwidth1 = 99.613;
	55	const Float_t AliTRDgeometry::fgkSwidth2 = 125.707;
	56	const Float_t AliTRDgeometry::fgkSlenTR1 = 751.0;
	57	const Float_t AliTRDgeometry::fgkSlenTR2 = 313.5;
	58	const Float_t AliTRDgeometry::fgkSlenTR3 = 159.5;
	59
0a770ac9	60	// Height of different chamber parts
	61	// Radiator
	62	const Float_t AliTRDgeometry::fgkCraH = 4.8;
	63	// Drift region
	64	const Float_t AliTRDgeometry::fgkCdrH = 3.0;
	65	// Amplification region
	66	const Float_t AliTRDgeometry::fgkCamH = 0.7;
	67	// Readout
	68	const Float_t AliTRDgeometry::fgkCroH = 2.0;
	69	// Total height
	70	const Float_t AliTRDgeometry::fgkCH = AliTRDgeometry::fgkCraH
	71	+ AliTRDgeometry::fgkCdrH
	72	+ AliTRDgeometry::fgkCamH
	73	+ AliTRDgeometry::fgkCroH;
	74
	75	// Vertical spacing of the chambers
	76	const Float_t AliTRDgeometry::fgkVspace = 2.1;
	77
	78	// Horizontal spacing of the chambers
	79	const Float_t AliTRDgeometry::fgkHspace = 2.0;
	80
	81	// Thicknesses of different parts of the chamber frame
	82	// Lower aluminum frame
	83	const Float_t AliTRDgeometry::fgkCalT = 0.3;
	84	// Lower G10 frame sides
	85	const Float_t AliTRDgeometry::fgkCclsT = 0.3;
	86	// Lower G10 frame front
	87	const Float_t AliTRDgeometry::fgkCclfT = 1.0;
	88	// Upper G10 frame
	89	const Float_t AliTRDgeometry::fgkCcuT = 0.9;
	90	// Upper Al frame
	91	const Float_t AliTRDgeometry::fgkCauT = 1.5;
	92
	93	// Additional width of the readout chamber frames
	94	const Float_t AliTRDgeometry::fgkCroW = 0.9;
	95
	96	// Difference of outer chamber width and pad plane width
	97	const Float_t AliTRDgeometry::fgkCpadW = 1.0;
de6df1b1	98	const Float_t AliTRDgeometry::fgkRpadW = 1.0;
793ff80c	99
	100	//
	101	// Thickness of the the material layers
	102	//
db30bf0f	103	const Float_t AliTRDgeometry::fgkRaThick = 0.3646;
793ff80c	104	const Float_t AliTRDgeometry::fgkMyThick = 0.005;
0a770ac9	105	const Float_t AliTRDgeometry::fgkDrThick = AliTRDgeometry::fgkCdrH;
	106	const Float_t AliTRDgeometry::fgkAmThick = AliTRDgeometry::fgkCamH;
	107	const Float_t AliTRDgeometry::fgkXeThick = AliTRDgeometry::fgkDrThick
	108	+ AliTRDgeometry::fgkAmThick;
793ff80c	109	const Float_t AliTRDgeometry::fgkCuThick = 0.001;
	110	const Float_t AliTRDgeometry::fgkSuThick = 0.06;
	111	const Float_t AliTRDgeometry::fgkFeThick = 0.0044;
	112	const Float_t AliTRDgeometry::fgkCoThick = 0.02;
db30bf0f	113	const Float_t AliTRDgeometry::fgkWaThick = 0.02;
793ff80c	114
	115	//
	116	// Position of the material layers
	117	//
0a770ac9	118	const Float_t AliTRDgeometry::fgkRaZpos = -1.50;
	119	const Float_t AliTRDgeometry::fgkMyZpos = 0.895;
	120	const Float_t AliTRDgeometry::fgkDrZpos = 2.4;
	121	const Float_t AliTRDgeometry::fgkAmZpos = 0.0;
	122	const Float_t AliTRDgeometry::fgkCuZpos = -0.9995;
793ff80c	123	const Float_t AliTRDgeometry::fgkSuZpos = 0.0000;
0a770ac9	124	const Float_t AliTRDgeometry::fgkFeZpos = 0.0322;
	125	const Float_t AliTRDgeometry::fgkCoZpos = 0.97;
	126	const Float_t AliTRDgeometry::fgkWaZpos = 0.99;
793ff80c	127
f7336fa3	128	//_____________________________________________________________________________
	129	AliTRDgeometry::AliTRDgeometry():AliGeometry()
	130	{
	131	//
	132	// AliTRDgeometry default constructor
	133	//
	134
	135	Init();
	136
	137	}
	138
	139	//_____________________________________________________________________________
	140	AliTRDgeometry::~AliTRDgeometry()
	141	{
8230f242	142	//
	143	// AliTRDgeometry destructor
	144	//
f7336fa3	145
	146	}
	147
	148	//_____________________________________________________________________________
	149	void AliTRDgeometry::Init()
	150	{
	151	//
	152	// Initializes the geometry parameter
	153	//
f7336fa3	154	// The maximum number of pads
	155	// and the position of pad 0,0,0
	156	//
	157	// chambers seen from the top:
	158	// +----------------------------+
	159	// \| \|
793ff80c	160	// \| \| ^
	161	// \| \| rphi\|
	162	// \| \| \|
	163	// \|0 \| \|
	164	// +----------------------------+ +------>
f7336fa3	165	// z
793ff80c	166	// chambers seen from the side: ^
	167	// +----------------------------+ drift\|
	168	// \|0 \| \|
	169	// \| \| \|
	170	// +----------------------------+ +------>
f7336fa3	171	// z
f7336fa3	172	//
a2b90f83	173	// IMPORTANT: time bin 0 is now the first one in the drift region
a2b90f83	174	// closest to the readout !!!
793ff80c	175	//
f7336fa3	176
0a770ac9	177	Int_t icham;
	178	Int_t iplan;
	179	Int_t isect;
	180
	181	// The outer width of the chambers
	182	fCwidth[0] = 95.6;
	183	fCwidth[1] = 100.1;
	184	fCwidth[2] = 104.5;
	185	fCwidth[3] = 108.9;
	186	fCwidth[4] = 113.4;
	187	fCwidth[5] = 117.8;
	188
	189	// The outer lengths of the chambers
8737e16f	190	Float_t length[kNplan][kNcham] = { { 124.0, 124.0, 110.0, 124.0, 124.0 }
	191	, { 131.0, 131.0, 110.0, 131.0, 131.0 }
	192	, { 138.0, 138.0, 110.0, 138.0, 138.0 }
	193	, { 145.0, 145.0, 110.0, 145.0, 145.0 }
	194	, { 147.0, 147.0, 110.0, 147.0, 147.0 }
	195	, { 147.0, 147.0, 110.0, 147.0, 147.0 } };
0a770ac9	196
	197	for (icham = 0; icham < kNcham; icham++) {
	198	for (iplan = 0; iplan < kNplan; iplan++) {
	199	fClength[iplan][icham] = length[iplan][icham];
	200	fClengthPH[iplan][icham] = 0.0;
	201	fClengthRH[iplan][icham] = 0.0;
	202	}
	203	}
	204
793ff80c	205	// The rotation matrix elements
	206	Float_t phi = 0;
	207	for (isect = 0; isect < fgkNsect; isect++) {
5443e65e	208	phi = -2.0 * TMath::Pi() / (Float_t) fgkNsect * ((Float_t) isect + 0.5);
793ff80c	209	fRotA11[isect] = TMath::Cos(phi);
	210	fRotA12[isect] = TMath::Sin(phi);
	211	fRotA21[isect] = TMath::Sin(phi);
	212	fRotA22[isect] = TMath::Cos(phi);
	213	phi = -1.0 * phi;
	214	fRotB11[isect] = TMath::Cos(phi);
	215	fRotB12[isect] = TMath::Sin(phi);
	216	fRotB21[isect] = TMath::Sin(phi);
	217	fRotB22[isect] = TMath::Cos(phi);
	218	}
	219
	220	}
	221
f7336fa3	222	//_____________________________________________________________________________
cbba4394	223	void AliTRDgeometry::CreateGeometry(Int_t *idtmed)
f7336fa3	224	{
f7336fa3	225	//
0a770ac9	226	// Create TRD geometry
0a770ac9	227	//
f7336fa3	228
	229	}
	230
	231	//_____________________________________________________________________________
5443e65e	232	Bool_t AliTRDgeometry::Local2Global(Int_t idet, Float_t *local
	233	, Float_t *global
	234	, AliTRDparameter *par) const
f7336fa3	235	{
	236	//
	237	// Converts local pad-coordinates (row,col,time) into
	238	// global ALICE reference frame coordinates (x,y,z)
	239	//
	240
793ff80c	241	Int_t icham = GetChamber(idet); // Chamber info (0-4)
	242	Int_t isect = GetSector(idet); // Sector info (0-17)
	243	Int_t iplan = GetPlane(idet); // Plane info (0-5)
f7336fa3	244
5443e65e	245	return Local2Global(iplan,icham,isect,local,global,par);
f7336fa3	246
	247	}
	248
	249	//_____________________________________________________________________________
	250	Bool_t AliTRDgeometry::Local2Global(Int_t iplan, Int_t icham, Int_t isect
5443e65e	251	, Float_t local, Float_t global
5443e65e	252	, AliTRDparameter *par) const
f7336fa3	253	{
	254	//
	255	// Converts local pad-coordinates (row,col,time) into
	256	// global ALICE reference frame coordinates (x,y,z)
	257	//
	258
5443e65e	259	if (!par) {
	260	Error("Local2Global","No parameter defined\n");
	261	return kFALSE;
	262	}
	263
793ff80c	264	Int_t idet = GetDetector(iplan,icham,isect); // Detector number
f7336fa3	265
16bf9884	266	Float_t padRow = local[0]+0.5; // Pad Row position
	267	Float_t padCol = local[1]+0.5; // Pad Column position
	268	Float_t timeSlice = local[2]+0.5; // Time "position"
f7336fa3	269
5443e65e	270	Float_t row0 = par->GetRow0(iplan,icham,isect);
	271	Float_t col0 = par->GetCol0(iplan);
	272	Float_t time0 = par->GetTime0(iplan);
f7336fa3	273
793ff80c	274	Float_t rot[3];
f7336fa3	275
f7336fa3	276	// calculate (x,y,z) position in rotated chamber
5443e65e	277	rot[0] = time0 - (timeSlice - par->GetTimeBefore())
	278	* par->GetTimeBinSize();
	279	rot[1] = col0 + padCol
	280	* par->GetColPadSize(iplan);
	281	rot[2] = row0 + padRow
	282	* par->GetRowPadSize(iplan,icham,isect);
f7336fa3	283
	284	// Rotate back to original position
	285	return RotateBack(idet,rot,global);
	286
	287	}
	288
	289	//_____________________________________________________________________________
793ff80c	290	Bool_t AliTRDgeometry::Rotate(Int_t d, Float_t pos, Float_t rot) const
f7336fa3	291	{
	292	//
	293	// Rotates all chambers in the position of sector 0 and transforms
	294	// the coordinates in the ALICE restframe <pos> into the
	295	// corresponding local frame <rot>.
	296	//
	297
793ff80c	298	Int_t sector = GetSector(d);
f7336fa3	299
793ff80c	300	rot[0] = pos[0] * fRotA11[sector] + pos[1] * fRotA12[sector];
793ff80c	301	rot[1] = -pos[0] * fRotA21[sector] + pos[1] * fRotA22[sector];
f7336fa3	302	rot[2] = pos[2];
	303
	304	return kTRUE;
	305
	306	}
	307
	308	//_____________________________________________________________________________
94de3818	309	Bool_t AliTRDgeometry::RotateBack(Int_t d, Float_t rot, Float_t pos) const
f7336fa3	310	{
	311	//
	312	// Rotates a chambers from the position of sector 0 into its
	313	// original position and transforms the corresponding local frame
	314	// coordinates <rot> into the coordinates of the ALICE restframe <pos>.
	315	//
	316
793ff80c	317	Int_t sector = GetSector(d);
f7336fa3	318
793ff80c	319	pos[0] = rot[0] * fRotB11[sector] + rot[1] * fRotB12[sector];
793ff80c	320	pos[1] = -rot[0] * fRotB21[sector] + rot[1] * fRotB22[sector];
6f1e466d	321	pos[2] = rot[2];
f7336fa3	322
	323	return kTRUE;
	324
	325	}
	326
	327	//_____________________________________________________________________________
0a770ac9	328	Int_t AliTRDgeometry::GetDetectorSec(const Int_t p, const Int_t c) const
	329	{
	330	//
	331	// Convert plane / chamber into detector number for one single sector
	332	//
	333
	334	return (p + c * fgkNplan);
	335
	336	}
	337
	338	//_____________________________________________________________________________
ff821236	339	Int_t AliTRDgeometry::GetDetector(const Int_t p, const Int_t c, const Int_t s) const
f7336fa3	340	{
	341	//
	342	// Convert plane / chamber / sector into detector number
	343	//
	344
793ff80c	345	return (p + c * fgkNplan + s * fgkNplan * fgkNcham);
f7336fa3	346
	347	}
	348
	349	//_____________________________________________________________________________
ff821236	350	Int_t AliTRDgeometry::GetPlane(const Int_t d) const
f7336fa3	351	{
	352	//
	353	// Reconstruct the plane number from the detector number
	354	//
	355
793ff80c	356	return ((Int_t) (d % fgkNplan));
f7336fa3	357
	358	}
	359
	360	//_____________________________________________________________________________
ff821236	361	Int_t AliTRDgeometry::GetChamber(const Int_t d) const
f7336fa3	362	{
	363	//
	364	// Reconstruct the chamber number from the detector number
	365	//
	366
793ff80c	367	return ((Int_t) (d % (fgkNplan * fgkNcham)) / fgkNplan);
f7336fa3	368
	369	}
	370
	371	//_____________________________________________________________________________
ff821236	372	Int_t AliTRDgeometry::GetSector(const Int_t d) const
f7336fa3	373	{
	374	//
	375	// Reconstruct the sector number from the detector number
	376	//
	377
793ff80c	378	return ((Int_t) (d / (fgkNplan * fgkNcham)));
f7336fa3	379
	380	}
	381
8737e16f	382	//_____________________________________________________________________________
	383	void AliTRDgeometry::SetOldGeometry()
	384	{
	385	//
	386	// Use the old chamber lengths
	387	//
	388
	389	Int_t icham;
	390	Int_t iplan;
	391
	392	Float_t length[kNplan][kNcham] = { { 123.5, 123.5, 110.0, 123.5, 123.5 }
	393	, { 131.0, 131.0, 110.0, 131.0, 131.0 }
	394	, { 134.5, 138.5, 110.0, 138.5, 134.5 }
	395	, { 142.0, 146.0, 110.0, 146.0, 142.0 }
	396	, { 142.0, 153.0, 110.0, 153.0, 142.0 }
	397	, { 134.0, 160.5, 110.0, 160.5, 134.0 } };
	398
	399	for (icham = 0; icham < kNcham; icham++) {
	400	for (iplan = 0; iplan < kNplan; iplan++) {
	401	fClength[iplan][icham] = length[iplan][icham];
	402	}
	403	}
	404
	405	}