fastjet 2.4.5
HepEntity.h
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00001 #ifndef  D0RunIIconeJets_HepEntity_class
00002 #define  D0RunIIconeJets_HepEntity_class
00003 
00004 #include "inline_maths.h"
00005 
00006 #include <fastjet/internal/base.hh>
00007 
00008 FASTJET_BEGIN_NAMESPACE
00009 
00010 namespace d0{
00011 
00012 //Author: Lars Sonnenschein 28/Mar/2007
00013 //This is an example class fulfilling the minimal requirements needed by the
00014 //D0 RunII cone jet algorithm implementation, which is an inlined template class
00015 
00016 class HepEntity {
00017 
00018  public:
00019 
00020   HepEntity() {
00021     E=0.;
00022     px=0.;
00023     py=0.;
00024     pz=0.;
00025     index = -1;
00026     return;
00027   }
00028 
00029 
00030   HepEntity(double E_in, double px_in, double py_in, double pz_in, int index_in = -1) : 
00031     E(E_in), px(px_in), py(py_in), pz(pz_in), index(index_in) {
00032     return;
00033   }
00034 
00035 
00036     HepEntity(const HepEntity& in) : E(in.E), px(in.px), py(in.py), pz(in.pz), index(in.index) {
00037     return;
00038   }
00039 
00040   
00041   inline double y() const {
00042     return inline_maths::y(E,pz);
00043   }
00044 
00045 
00046   inline double phi() const {
00047      return inline_maths::phi(px,py);
00048   }
00049 
00050 
00051   inline double pT() const {
00052      return sqrt(inline_maths::sqr(px)+inline_maths::sqr(py));
00053   }
00054 
00055 
00056   inline void p4vec(float* p) const {
00057     p[0] = px;
00058     p[1] = py;
00059     p[2] = pz;
00060     p[3] = E;
00061     return;
00062   }
00063 
00064   inline void Add(const HepEntity el) {
00065     E += el.E;
00066     px += el.px;
00067     py += el.py;
00068     pz += el.pz;
00069     return;
00070   }
00071 
00072   inline void Fill(double E_in, double px_in, double py_in, double pz_in, int index_in = -1) {
00073     E = E_in;
00074     px = px_in;
00075     py = py_in;
00076     pz = pz_in;
00077     index = index_in;
00078     return;
00079   }
00080 
00081 
00082   double E;
00083   double px;
00084   double py;
00085   double pz;
00086   int    index;
00087 
00088  private:
00089 
00090 
00091 
00092 };
00093 //end of class HepEntity;
00094 
00095 
00096 }  // namespace d0
00097 
00098 FASTJET_END_NAMESPACE
00099 
00100 #endif
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