1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 ///////////////////////////////////////////////////////////////////////////////
20 // Describes a pad plane of a TRD ROC //
22 // Contains the information on pad postions, pad dimensions, //
23 // tilting angle, etc. //
24 // It also provides methods to identify the current pad number from //
25 // global coordinates. //
27 ///////////////////////////////////////////////////////////////////////////////
29 #include "AliTRDpadPlane.h"
30 #include "AliTRDgeometry.h"
32 ClassImp(AliTRDpadPlane)
34 //_____________________________________________________________________________
35 AliTRDpadPlane::AliTRDpadPlane():TObject()
38 // Default constructor
69 //_____________________________________________________________________________
70 AliTRDpadPlane::AliTRDpadPlane(Int_t p, Int_t c):TObject(),fPadRow(0),fPadCol(0)
73 // Constructor that initializes a given pad plane type
76 fGeo = new AliTRDgeometry();
90 // The pad plane parameter
103 fTiltingAngle = -2.0;
114 fTiltingAngle = -2.0;
151 fTiltingAngle = -2.0;
162 fTiltingAngle = -2.0;
199 fTiltingAngle = -2.0;
210 fTiltingAngle = -2.0;
240 // Store tilting angle as tangens
242 fTiltingTan = TMath::Tan(TMath::Pi()/180.0 * fTiltingAngle);
245 // The positions of the borders of the pads
249 fPadRow = new Double_t[fNrows];
250 Double_t row = fGeo->GetChamberLength(p,0)
251 + fGeo->GetChamberLength(p,1)
252 + fGeo->GetChamberLength(p,2) / 2.
255 for (Int_t ic = 0; ic < c; ic++) {
256 row -= fGeo->GetChamberLength(p,ic);
258 for (Int_t ir = 0; ir < fNrows; ir++) {
271 fPadCol = new Double_t[fNcols];
272 Double_t col = fGeo->GetChamberWidth(p) / 2.
275 for (Int_t ic = 0; ic < fNcols; ic++) {
288 //_____________________________________________________________________________
289 AliTRDpadPlane::AliTRDpadPlane(const AliTRDpadPlane &p):TObject(p)
292 // AliTRDpadPlane copy constructor
295 ((AliTRDpadPlane &) p).Copy(*this);
299 //_____________________________________________________________________________
300 AliTRDpadPlane::~AliTRDpadPlane()
303 // AliTRDpadPlane destructor
323 //_____________________________________________________________________________
324 AliTRDpadPlane &AliTRDpadPlane::operator=(const AliTRDpadPlane &p)
327 // Assignment operator
330 if (this != &p) ((AliTRDpadPlane &) p).Copy(*this);
335 //_____________________________________________________________________________
336 void AliTRDpadPlane::Copy(TObject &p) const
344 ((AliTRDpadPlane &) p).fGeo = 0;
346 ((AliTRDpadPlane &) p).fPla = fPla;
347 ((AliTRDpadPlane &) p).fCha = fCha;
349 ((AliTRDpadPlane &) p).fLength = fLength;
350 ((AliTRDpadPlane &) p).fWidth = fWidth;
351 ((AliTRDpadPlane &) p).fLengthRim = fLengthRim;
352 ((AliTRDpadPlane &) p).fWidthRim = fWidthRim;
353 ((AliTRDpadPlane &) p).fLengthOPad = fLengthOPad;
354 ((AliTRDpadPlane &) p).fWidthOPad = fWidthOPad;
355 ((AliTRDpadPlane &) p).fLengthIPad = fLengthIPad;
356 ((AliTRDpadPlane &) p).fWidthIPad = fWidthIPad;
358 ((AliTRDpadPlane &) p).fRowSpacing = fRowSpacing;
359 ((AliTRDpadPlane &) p).fColSpacing = fColSpacing;
361 ((AliTRDpadPlane &) p).fNrows = fNrows;
362 ((AliTRDpadPlane &) p).fNcols = fNcols;
364 ((AliTRDpadPlane &) p).fTiltingAngle = fTiltingAngle;
365 ((AliTRDpadPlane &) p).fTiltingTan = fTiltingTan;
367 if (((AliTRDpadPlane &) p).fPadRow) delete [] ((AliTRDpadPlane &) p).fPadRow;
368 ((AliTRDpadPlane &) p).fPadRow = new Double_t[fNrows];
369 for (iBin = 0; iBin < fNrows; iBin++) {
370 ((AliTRDpadPlane &) p).fPadRow[iBin] = fPadRow[iBin];
373 if (((AliTRDpadPlane &) p).fPadCol) delete [] ((AliTRDpadPlane &) p).fPadCol;
374 ((AliTRDpadPlane &) p).fPadCol = new Double_t[fNrows];
375 for (iBin = 0; iBin < fNrows; iBin++) {
376 ((AliTRDpadPlane &) p).fPadCol[iBin] = fPadCol[iBin];
383 //_____________________________________________________________________________
384 Int_t AliTRDpadPlane::GetPadRowNumber(Double_t z) const
387 // Finds the pad row number for a given global z-position
395 if ((z > GetRow0()) || (z < GetRowEnd())) {
404 while (nabove - nbelow > 1) {
405 middle = (nabove + nbelow) / 2;
406 if (z == fPadRow[middle-1]) row = middle;
407 if (z > fPadRow[middle-1]) nabove = middle;
408 else nbelow = middle;
418 //_____________________________________________________________________________
419 Int_t AliTRDpadPlane::GetPadColNumber(Double_t rphi
420 , Double_t /*rowOffset*/) const
423 // Finds the pad column number for a given global rphi-position
430 Double_t rphiShift = 0;
432 // MI change don't apply tilting angle here - better to do it directly on hit level
433 // Take the tilting angle into account by shifting the hit position
434 // into the opposite direction
440 if ((rphiShift > GetCol0()) || (rphiShift < GetColEnd())) {
449 while (nabove - nbelow > 1) {
450 middle = (nabove + nbelow) / 2;
451 if (rphiShift == fPadCol[middle-1]) col = middle;
452 if (rphiShift > fPadCol[middle-1]) nabove = middle;
453 else nbelow = middle;