* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.8 2003/01/14 10:50:18 alibrary
-Cleanup of STEER coding conventions
-
-Revision 1.7 2002/02/08 16:50:50 morsch
-Add name and title in constructor.
-
-Revision 1.6 2001/07/27 17:09:35 morsch
-Use local SetTrack, KeepTrack and SetHighWaterMark methods
-to delegate either to local stack or to stack owned by AliRun.
-(Piotr Skowronski, A.M.)
-
-Revision 1.5 2000/12/21 16:24:06 morsch
-Coding convention clean-up
-
-Revision 1.4 2000/11/30 07:12:49 alibrary
-Introducing new Rndm and QA classes
-
-Revision 1.3 2000/10/02 21:28:06 fca
-Removal of useless dependecies via forward declarations
-
-Revision 1.2 2000/07/11 18:24:55 fca
-Coding convention corrections + few minor bug fixes
-
-Revision 1.1 2000/06/09 20:22:58 morsch
-Same class as previously in AliSimpleGen.cxx
-All coding rule violations except RS3 corrected (AM)
-
-*/
-
+/* $Id$ */
// Generator for particles in a preset
// kinematic range (flat distribution)
// Note that for a given theta pt and p are not independent
// Range for only one variable (pt or p) should be given.
-//
// Comments and suggestions: andreas.morsch@cern.ch
-//
-//Begin_Html
-/*
-<img src="picts/AliGeneratorClass.gif">
-</pre>
-<br clear=left>
-<font size=+2 color=red>
-<p>The responsible person for this module is
-<a href="mailto:andreas.morsch@cern.ch">Andreas Morsch</a>.
-</font>
-<pre>
-*/
-//End_Html
-// //
-///////////////////////////////////////////////////////////////////
+
#include "TPDGCode.h"
#include "AliConst.h"
#include "AliGenBox.h"
#include "AliRun.h"
+#include "AliGenEventHeader.h"
+#include "TDatabasePDG.h"
+#include "AliPDG.h"
ClassImp(AliGenBox)
//_____________________________________________________________________________
AliGenBox::AliGenBox()
- :AliGenerator()
+ :AliGenerator(),
+ fIpart(0),
+ fEtaMin(0),
+ fEtaMax(0)
{
//
// Default constructor
//
- fIpart=0;
}
//_____________________________________________________________________________
AliGenBox::AliGenBox(Int_t npart)
- :AliGenerator(npart)
+ :AliGenerator(npart),
+ fIpart(kProton),
+ fEtaMin(0),
+ fEtaMax(0)
{
//
// Standard constructor
//
fName = "Box";
fTitle = "Box particle generator";
- // Generate Proton by default
- fIpart=kProton;
}
//_____________________________________________________________________________
Float_t polar[3]= {0,0,0};
//
Float_t origin[3];
+ Float_t time;
Float_t p[3];
Int_t i, j, nt;
Double_t pmom, theta, phi, pt;
+ Double_t y, mt;
//
Float_t random[6];
//
for (j=0;j<3;j++) origin[j]=fOrigin[j];
+ time = fTimeOrigin;
if(fVertexSmear==kPerEvent) {
Vertex();
for (j=0;j<3;j++) origin[j]=fVertex[j];
+ time = fTime;
}
+ Double_t m = TDatabasePDG::Instance()->GetParticle(fIpart)->Mass();
+
for(i=0;i<fNpart;i++) {
Rndm(random,3);
- theta=fThetaMin+random[0]*(fThetaMax-fThetaMin);
- if(TestBit(kMomentumRange)) {
- pmom=fPMin+random[1]*(fPMax-fPMin);
- pt=pmom*TMath::Sin(theta);
+
+ if (TestBit(kYRange)) {
+ y = fYMin+random[0]*(fYMax-fYMin);
+
+ if(TestBit(kMomentumRange)) {
+ pmom=fPMin+random[1]*(fPMax-fPMin);
+ mt = TMath::Sqrt(pmom*pmom+m*m)/TMath::CosH(y);
+ pt = TMath::Sqrt(mt*mt - m*m);
+ } else {
+ pt=fPtMin+random[1]*(fPtMax-fPtMin);
+ mt=TMath::Sqrt(pt*pt+m*m);
+ }
+
+ phi=fPhiMin+random[2]*(fPhiMax-fPhiMin);
+ p[0] = pt*TMath::Cos(phi);
+ p[1] = pt*TMath::Sin(phi);
+ p[2] = mt*TMath::SinH(y);
} else {
+ if (TestBit(kThetaRange)) {
+ theta = fThetaMin+random[0]*(fThetaMax-fThetaMin);
+ } else {
+ Float_t eta = fEtaMin+random[0]*(fEtaMax-fEtaMin);
+ theta = 2. * TMath::ATan(TMath::Exp(-eta));
+ }
+
+ if(TestBit(kMomentumRange)) {
+ pmom=fPMin+random[1]*(fPMax-fPMin);
+ pt=pmom*TMath::Sin(theta);
+ } else {
+
+ pt=fPtMin+random[1]*(fPtMax-fPtMin);
+ pmom=pt/TMath::Sin(theta);
+ }
- pt=fPtMin+random[1]*(fPtMax-fPtMin);
- pmom=pt/TMath::Sin(theta);
+ phi=fPhiMin+random[2]*(fPhiMax-fPhiMin);
+ p[0] = pt*TMath::Cos(phi);
+ p[1] = pt*TMath::Sin(phi);
+ p[2] = pmom*TMath::Cos(theta);
}
- phi=fPhiMin+random[2]*(fPhiMax-fPhiMin);
- p[0] = pt*TMath::Cos(phi);
- p[1] = pt*TMath::Sin(phi);
- p[2] = pmom*TMath::Cos(theta);
if(fVertexSmear==kPerTrack) {
Rndm(random,6);
origin[j]=fOrigin[j]+fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())*
TMath::Sqrt(-2*TMath::Log(random[2*j+1]));
}
+
+ Rndm(random,2);
+ time = fTimeOrigin + fOsigma[2]/TMath::Ccgs()*
+ TMath::Cos(2*random[0]*TMath::Pi())*
+ TMath::Sqrt(-2*TMath::Log(random[1]));
}
- SetTrack(fTrackIt,-1,fIpart,p,origin,polar,0,kPPrimary,nt);
+ PushTrack(fTrackIt,-1,fIpart,p,origin,polar,time,kPPrimary,nt);
+ }
+
+ AliGenEventHeader* header = new AliGenEventHeader("BOX");
+ header->SetPrimaryVertex(fVertex);
+ header->SetNProduced(fNpart);
+ header->SetInteractionTime(fTime);
+
+ // Passes header either to the container or to gAlice
+ if (fContainer) {
+ fContainer->AddHeader(header);
+ } else {
+ gAlice->SetGenEventHeader(header);
}
}
Fatal("Init","You should not set the momentum range and the pt range!\n");
if((!TestBit(kPtRange))&&(!TestBit(kMomentumRange)))
Fatal("Init","You should set either the momentum or the pt range!\n");
+ if((TestBit(kYRange)&&TestBit(kThetaRange)) || (TestBit(kYRange)&&TestBit(kEtaRange)) || (TestBit(kEtaRange)&&TestBit(kThetaRange)) )
+ Fatal("Init","You should only set the range of one of these variables: y, eta or theta\n");
+ if((!TestBit(kYRange)) && (!TestBit(kEtaRange)) && (!TestBit(kThetaRange)) )
+ Fatal("Init","You should set the range of one of these variables: y, eta or theta\n");
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff