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 "AliTRDgeometryFull.h"
32 ClassImp(AliTRDpadPlane)
34 //_____________________________________________________________________________
35 AliTRDpadPlane::AliTRDpadPlane():TObject()
38 // Default constructor
68 //_____________________________________________________________________________
69 AliTRDpadPlane::AliTRDpadPlane(Int_t p, Int_t c):TObject()
72 // Constructor that initializes a given pad plane type
75 fGeo = new AliTRDgeometryFull();
89 // The pad plane parameter
102 fTiltingAngle = -2.0;
113 fTiltingAngle = -2.0;
150 fTiltingAngle = -2.0;
161 fTiltingAngle = -2.0;
198 fTiltingAngle = -2.0;
209 fTiltingAngle = -2.0;
239 // Store tilting angle as tangens (opposite direction!)
241 fTiltingAngle = TMath::Tan(TMath::Pi()/180.0 * -fTiltingAngle);
244 // The positions of the borders of the pads
248 fPadRow = new Double_t[fNrows];
249 Double_t row = fGeo->GetChamberLength(p,0)
250 + fGeo->GetChamberLength(p,1)
251 + fGeo->GetChamberLength(p,2) / 2.
254 for (Int_t ic = 0; ic < c; ic++) {
255 row -= fGeo->GetChamberLength(p,ic);
257 for (Int_t ir = 0; ir < fNrows; ir++) {
270 fPadCol = new Double_t[fNcols];
271 Double_t col = fGeo->GetChamberWidth(p) / 2.
274 for (Int_t ic = 0; ic < fNcols; ic++) {
287 //_____________________________________________________________________________
288 AliTRDpadPlane::AliTRDpadPlane(const AliTRDpadPlane &p):TObject(p)
291 // AliTRDpadPlane copy constructor
294 ((AliTRDpadPlane &) p).Copy(*this);
298 //_____________________________________________________________________________
299 AliTRDpadPlane::~AliTRDpadPlane()
302 // AliTRDpadPlane destructor
322 //_____________________________________________________________________________
323 AliTRDpadPlane &AliTRDpadPlane::operator=(const AliTRDpadPlane &p)
326 // Assignment operator
329 if (this != &p) ((AliTRDpadPlane &) p).Copy(*this);
334 //_____________________________________________________________________________
335 void AliTRDpadPlane::Copy(TObject &p) const
343 ((AliTRDpadPlane &) p).fGeo = 0;
345 ((AliTRDpadPlane &) p).fPla = fPla;
346 ((AliTRDpadPlane &) p).fCha = fCha;
348 ((AliTRDpadPlane &) p).fLength = fLength;
349 ((AliTRDpadPlane &) p).fWidth = fWidth;
350 ((AliTRDpadPlane &) p).fLengthRim = fLengthRim;
351 ((AliTRDpadPlane &) p).fWidthRim = fWidthRim;
352 ((AliTRDpadPlane &) p).fLengthOPad = fLengthOPad;
353 ((AliTRDpadPlane &) p).fWidthOPad = fWidthOPad;
354 ((AliTRDpadPlane &) p).fLengthIPad = fLengthIPad;
355 ((AliTRDpadPlane &) p).fWidthIPad = fWidthIPad;
357 ((AliTRDpadPlane &) p).fRowSpacing = fRowSpacing;
358 ((AliTRDpadPlane &) p).fColSpacing = fColSpacing;
360 ((AliTRDpadPlane &) p).fNrows = fNrows;
361 ((AliTRDpadPlane &) p).fNcols = fNcols;
363 ((AliTRDpadPlane &) p).fTiltingAngle = fTiltingAngle;
365 if (((AliTRDpadPlane &) p).fPadRow) delete [] ((AliTRDpadPlane &) p).fPadRow;
366 ((AliTRDpadPlane &) p).fPadRow = new Double_t[fNrows];
367 for (iBin = 0; iBin < fNrows; iBin++) {
368 ((AliTRDpadPlane &) p).fPadRow[iBin] = fPadRow[iBin];
371 if (((AliTRDpadPlane &) p).fPadCol) delete [] ((AliTRDpadPlane &) p).fPadCol;
372 ((AliTRDpadPlane &) p).fPadCol = new Double_t[fNrows];
373 for (iBin = 0; iBin < fNrows; iBin++) {
374 ((AliTRDpadPlane &) p).fPadCol[iBin] = fPadCol[iBin];
381 //_____________________________________________________________________________
382 Int_t AliTRDpadPlane::GetPadRowNumber(const Double_t z) const
385 // Finds the pad row number for a given global z-position
393 if ((z > GetRow0()) || (z < GetRowEnd())) {
402 while (nabove - nbelow > 1) {
403 middle = (nabove + nbelow) / 2;
404 if (z == fPadRow[middle-1]) row = middle;
405 if (z > fPadRow[middle-1]) nabove = middle;
406 else nbelow = middle;
416 //_____________________________________________________________________________
417 Int_t AliTRDpadPlane::GetPadColNumber(const Double_t rphi
418 , const Double_t rowOffset) const
421 // Finds the pad column number for a given global rphi-position
428 Double_t rphiShift = 0;
430 if ((rphi > GetCol0()) || (rphi < GetColEnd())) {
438 // Take the tilting angle into account by shifting the hit position
439 // into the opposite direction
442 rphiShift = rphi + fTiltingAngle * rowOffset;
446 while (nabove - nbelow > 1) {
447 middle = (nabove + nbelow) / 2;
448 if (rphi == fPadCol[middle-1]) col = middle;
449 if (rphi > fPadCol[middle-1]) nabove = middle;
450 else nbelow = middle;
454 //printf("rphi=%f, rphiShift=%f, col=%d, colH=%f\n"
455 // ,rphi,rphiShift,col,fPadCol[col]);