[u/mrichter/AliRoot.git] / EVGEN / AliGenFixed.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.                  *
 **************************************************************************/

/* $Id$ */

// Simple particle gun. 
// Momentum, phi and theta of the partice as well as the particle type can be set.
// If fExplicit is true the user set momentum vector is used,
// otherwise it is calculated.
// andreas.morsch@cern.ch

#include "TPDGCode.h"

#include "AliGenFixed.h"
#include "AliRun.h"
  
ClassImp(AliGenFixed)

//_____________________________________________________________________________
AliGenFixed::AliGenFixed()
    :AliGenerator(), 
     fIpart(0),
     fExplicit(kFALSE)
{
  //
  // Default constructor
  //
}

//_____________________________________________________________________________
AliGenFixed::AliGenFixed(Int_t npart)
    :AliGenerator(npart),
     fIpart(kProton),
     fExplicit(kFALSE)
{
  //
  // Standard constructor
  //
  fName="Fixed";
  fTitle="Fixed Particle Generator";
}

//_____________________________________________________________________________
void AliGenFixed::Generate()
{
  //
  // Generate one trigger
  //
  Float_t polar[3]= {0,0,0};
  if(!fExplicit) {
    fP[0] = fPMin * TMath::Cos(fPhiMin) * TMath::Sin(fThetaMin);
    fP[1] = fPMin * TMath::Sin(fPhiMin) * TMath::Sin(fThetaMin);
    fP[2] = fPMin * TMath::Cos(fThetaMin);
  }
  Int_t i, j, nt;
  //
  Float_t o[3] = {0., 0., 0.}; 
  if(fVertexSmear == kPerEvent) {
      Vertex();
      for (j = 0;j < 3; j++) o[j] = fVertex[j];
  }
  
  for(i = 0; i < fNpart; i++) 
    PushTrack(fTrackIt, -1, fIpart, fP, o , polar, 0, kPPrimary, nt);
}
Commit	Line	Data
	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	// Simple particle gun.
	19	// Momentum, phi and theta of the partice as well as the particle type can be set.
	20	// If fExplicit is true the user set momentum vector is used,
	21	// otherwise it is calculated.
	22	// andreas.morsch@cern.ch
	23
	24	#include "TPDGCode.h"
	25
	26	#include "AliGenFixed.h"
	27	#include "AliRun.h"
	28
	29	ClassImp(AliGenFixed)
	30
	31	//_____________________________________________________________________________
	32	AliGenFixed::AliGenFixed()
	33	:AliGenerator(),
	34	fIpart(0),
	35	fExplicit(kFALSE)
	36	{
	37	//
	38	// Default constructor
	39	//
	40	}
	41
	42	//_____________________________________________________________________________
	43	AliGenFixed::AliGenFixed(Int_t npart)
	44	:AliGenerator(npart),
	45	fIpart(kProton),
	46	fExplicit(kFALSE)
	47	{
	48	//
	49	// Standard constructor
	50	//
	51	fName="Fixed";
	52	fTitle="Fixed Particle Generator";
	53	}
	54
	55	//_____________________________________________________________________________
	56	void AliGenFixed::Generate()
	57	{
	58	//
	59	// Generate one trigger
	60	//
	61	Float_t polar[3]= {0,0,0};
	62	if(!fExplicit) {
	63	fP[0] = fPMin * TMath::Cos(fPhiMin) * TMath::Sin(fThetaMin);
	64	fP[1] = fPMin * TMath::Sin(fPhiMin) * TMath::Sin(fThetaMin);
	65	fP[2] = fPMin * TMath::Cos(fThetaMin);
	66	}
	67	Int_t i, j, nt;
	68	//
	69	Float_t o[3] = {0., 0., 0.};
	70	if(fVertexSmear == kPerEvent) {
	71	Vertex();
	72	for (j = 0;j < 3; j++) o[j] = fVertex[j];
	73	}
	74
	75	for(i = 0; i < fNpart; i++)
	76	PushTrack(fTrackIt, -1, fIpart, fP, o , polar, 0, kPPrimary, nt);
	77	}
	78