// -*- mode: c++ -*- 
//
// $Id: BrCollisionFilter.h,v 1.3 2001/11/21 19:21:18 cholm Exp $
// $Author: cholm $
// $Date: 2001/11/21 19:21:18 $
// $Copyright: 2000 BRAHMS Collaboration
//

#ifndef BRAT_BrCollisionFilter
#define BRAT_BrCollisionFilter
#ifndef BRAT_BrVertexFilter
#include "BrVertexFilter.h"
#endif
#ifndef ROOT_TH2
#include "TH2.h"
#endif


class BrCollisionFilter : public BrVertexFilter 
{
private:
  Float_t fBbSigma;
  Float_t fSigmaRange;

  TH1F*   fAllBbZdc;
  TH1F*   fAccBbZdc;
  TH2F*   fAccBbZdc2D;

  Int_t   fNoAcceptedBBZDC; // No of times BB-ZDC req cut was passed.

  virtual Bool_t  CheckBbZdcVertex(BrEventNode* node);
public:
  BrCollisionFilter();
  BrCollisionFilter(const Char_t* name, const Char_t* title);

  virtual void    SetBBSigma(Float_t    z=6) {fBbSigma = z;}   //*MENU*
  virtual void    SetSigmaRange(Float_t z=3){fSigmaRange = z;} //*MENU*

  virtual void    DefineHistograms();
  virtual void    Event(BrEventNode* input, BrEventNode*); 
  virtual void    Print(Option_t* option="BS") const; //*MENU*

  ClassDef(BrCollisionFilter,0) // A Collision filter using vertex info
}
;
#endif 
//
// $Log: BrCollisionFilter.h,v $
// Revision 1.3  2001/11/21 19:21:18  cholm
// Fix so that statistics is properly printed.
//
// Revision 1.2  2001/11/02 15:18:37  cholm
// Changed the BrCollisionFilter to derive from BrVertexFilter (updates
// to both classes), since the collision filter is basically a vertex.
//
// Revision 1.1.1.1  2001/06/21 14:55:14  hagel
// Initial revision of brat2
//
// Revision 1.2  2001/06/19 15:16:27  brahmlib
// Declared SetDefaultParameters void
//
// Revision 1.1  2001/06/05 20:15:30  videbaek
// Add collision selection filter
//