Line data    Source code

       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             : 
      16             : /* $Id$ */
      17             : 
      18             : // Realisation of AliFastResponse for the
      19             : // fast simulation of the muon spectrometer acceptance.
      20             : // The acceptance depends on the muon 3-vector which can be passed as (pt, theta, phi), 
      21             : // where pt is the transverse momentum, theta the polar angle and phi the azimuthal angle.
      22             : // Author: Andreas Morsch
      23             : // andreas.morsch@cern.ch 
      24             : 
      25             : #include <TMath.h>
      26             : 
      27             : #include "AliFastMuonTrackingAcc.h"
      28             : #include "AliMUONFastTracking.h"
      29             : 
      30          12 : ClassImp(AliFastMuonTrackingAcc)
      31             : 
      32             : 
      33             : AliFastMuonTrackingAcc::AliFastMuonTrackingAcc() :
      34           0 :     AliFastResponse("Acceptance", "Muon Tracking Acceptance"),
      35           0 :     fBackground(1.),
      36           0 :     fCharge(1.),
      37           0 :     fFastTracking(0)
      38           0 : {
      39             :     // Default Constructor
      40           0 : }
      41             : 
      42             : AliFastMuonTrackingAcc::AliFastMuonTrackingAcc(const AliFastMuonTrackingAcc & acc)
      43           0 :     :AliFastResponse(acc),
      44           0 :      fBackground(1.),
      45           0 :      fCharge(1.),
      46           0 :      fFastTracking(0)
      47           0 : {
      48             : // Copy constructor
      49           0 :     acc.Copy(*this);
      50           0 : }
      51             : 
      52             : void AliFastMuonTrackingAcc::Init()
      53             : {
      54           0 :     fFastTracking = AliMUONFastTracking::Instance();
      55           0 :     fFastTracking->Init(fBackground);
      56           0 : }
      57             : 
      58             : 
      59             : 
      60             : Float_t AliFastMuonTrackingAcc::Evaluate(Float_t /*charge*/, Float_t pt, Float_t theta, Float_t phi)
      61             : {
      62             : // Evaluate the tracking acceptance for 3-vector pt, theta, phi
      63           0 :     Float_t p = pt / TMath::Sin(theta*TMath::Pi()/180.);
      64           0 :     Float_t eff =  fFastTracking->Acceptance(p, theta, phi, Int_t(fCharge));
      65           0 :     return eff;
      66             : }
      67             : 
      68             : AliFastMuonTrackingAcc& AliFastMuonTrackingAcc::operator=(const  AliFastMuonTrackingAcc& rhs)
      69             : {
      70             : // Assignment operator
      71           0 :     rhs.Copy(*this);
      72           0 :     return *this;
      73             : }