/************************************************************************** * 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\$ */ /////////////////////////////////////////////////////////////////////// // Paramter class for AliDetector // // // // Origin: Marian Ivanov, Uni. of Bratislava, ivanov@fmph.uniba.sk // // // /////////////////////////////////////////////////////////////////////// #include "TObject.h" #include "AliDetectorParam.h" Float_t * AliDetectorParam::GetAnglesAccMomentum(Float_t *x, Int_t * /*index*/, Float_t *momentum, Float_t *angle) { // //calculates deflection angle of particle with longitudinal //longitudinal momentum[0] and transversal momentum momentum[1] //at position (x,y,z) = (x[0],x[1],x[2]) //angle[0] - deep angle //angle[1] - magnetic deflection angle if (momentum==0) { Float_t rtotal =TMath::Sqrt(x[0]*x[0]+x[1]*x[1]); if (rtotal==0) angle[0]=0; else angle[0] = TMath::ATan(x[2]/rtotal); angle[1]=0; return angle; } Float_t mtotal =TMath::Sqrt(momentum[0]*momentum[0]+momentum[1]*momentum[1]); if (mtotal==0) { angle[0]= 0; angle[1]=0; return angle; } angle[0]= TMath::ATan(momentum[2]/mtotal); Float_t radius1 = TMath::Sqrt(x[0]*x[0]+x[1]*x[1]); //axial symetry in z Float_t radius2 = 1000*mtotal/(3*fBField); if (radius1