[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()
{
  //
  // Default constructor
  //
  fIpart = 0;
  fExplicit = kFALSE;
}

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

//_____________________________________________________________________________
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, nt;
  //
  for(i=0;i<fNpart;i++) 
    PushTrack(fTrackIt,-1,fIpart,fP,fOrigin.GetArray(),polar,0,kPPrimary,nt);
}
  
//_____________________________________________________________________________
void AliGenFixed::SetSigma(Float_t /*sx*/, Float_t /*sy*/, Float_t /*sz*/)
{
  //
  // Set the interaction point sigma
  //
  printf("Vertex smearing not implemented for fixed generator\n");
}
Commit	Line	Data
790bbabf	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
803d1ab0	16	/* $Id$ */
675e9664	17
	18	// Simple particle gun.
	19	// Momentum, phi and theta of the partice as well as the particle type can be set.
0af12c00	20	// If fExplicit is true the user set momentum vector is used,
0af12c00	21	// otherwise it is calculated.
675e9664	22	// andreas.morsch@cern.ch
790bbabf	23
116cbefd	24	#include "TPDGCode.h"
116cbefd	25
790bbabf	26	#include "AliGenFixed.h"
790bbabf	27	#include "AliRun.h"
790bbabf	28
	29	ClassImp(AliGenFixed)
	30
	31	//_____________________________________________________________________________
	32	AliGenFixed::AliGenFixed()
	33	:AliGenerator()
	34	{
	35	//
	36	// Default constructor
	37	//
	38	fIpart = 0;
f1f30542	39	fExplicit = kFALSE;
790bbabf	40	}
	41
	42	//_____________________________________________________________________________
	43	AliGenFixed::AliGenFixed(Int_t npart)
	44	:AliGenerator(npart)
	45	{
	46	//
	47	// Standard constructor
	48	//
	49	fName="Fixed";
	50	fTitle="Fixed Particle Generator";
	51	// Generate Proton by default
	52	fIpart=kProton;
49c4fdc3	53	fExplicit = kFALSE;
790bbabf	54	}
	55
	56	//_____________________________________________________________________________
	57	void AliGenFixed::Generate()
	58	{
	59	//
	60	// Generate one trigger
	61	//
	62	Float_t polar[3]= {0,0,0};
f1f30542	63	if(!fExplicit) {
	64	fP[0] = fPMinTMath::Cos(fPhiMin)TMath::Sin(fThetaMin);
	65	fP[1] = fPMinTMath::Sin(fPhiMin)TMath::Sin(fThetaMin);
	66	fP[2] = fPMin*TMath::Cos(fThetaMin);
	67	}
790bbabf	68	Int_t i, nt;
790bbabf	69	//
f1f30542	70	for(i=0;i<fNpart;i++)
642f15cf	71	PushTrack(fTrackIt,-1,fIpart,fP,fOrigin.GetArray(),polar,0,kPPrimary,nt);
790bbabf	72	}
	73
	74	//_____________________________________________________________________________
198bb1c7	75	void AliGenFixed::SetSigma(Float_t /sx/, Float_t /sy/, Float_t /sz/)
790bbabf	76	{
	77	//
	78	// Set the interaction point sigma
	79	//
	80	printf("Vertex smearing not implemented for fixed generator\n");
	81	}