| 1 |
//--------------------------------------------------------------------------------------------------
|
| 2 |
// $Id: MatchingTools.h,v 1.3 2009/02/17 06:49:01 phedex Exp $
|
| 3 |
//
|
| 4 |
// MatchingTools
|
| 5 |
//
|
| 6 |
//
|
| 7 |
//
|
| 8 |
// Authors: C.Loizides
|
| 9 |
//--------------------------------------------------------------------------------------------------
|
| 10 |
|
| 11 |
#ifndef MITPHYSICS_UTILS_MATCHINGTOOLS_H
|
| 12 |
#define MITPHYSICS_UTILS_MATCHINGTOOLS_H
|
| 13 |
|
| 14 |
#include <TMath.h>
|
| 15 |
#include "MitCommon/MathTools/interface/MathUtils.h"
|
| 16 |
#include "MitAna/DataCont/interface/Collection.h"
|
| 17 |
|
| 18 |
namespace mithep
|
| 19 |
{
|
| 20 |
class MatchingTools {
|
| 21 |
public:
|
| 22 |
template<class V1, class V2>
|
| 23 |
static const V2 *Closest(const V1 *v1, const Collection<V2> &col, Double_t maxR);
|
| 24 |
template<class V1, class V2>
|
| 25 |
static const V2 *ClosestEtaPhiPt(const V1 *v1, const Collection<V2> &col, Double_t max);
|
| 26 |
};
|
| 27 |
|
| 28 |
//------------------------------------------------------------------------------------------------
|
| 29 |
template<class V1, class V2>
|
| 30 |
const V2 *MatchingTools::Closest(const V1 *v1, const Collection<V2> &col, Double_t maxR)
|
| 31 |
{
|
| 32 |
// Return closest geometrical neighbor in eta-phi within maximum delta R of maxR.
|
| 33 |
|
| 34 |
const V2 *res = 0;
|
| 35 |
|
| 36 |
const UInt_t ents = col.GetEntries();
|
| 37 |
if (ents>0) {
|
| 38 |
Double_t dR = 1e30;
|
| 39 |
for (UInt_t i = 0; i<ents; ++i) {
|
| 40 |
const V2 *v2 = col.At(i);
|
| 41 |
Double_t diff = MathUtils::DeltaR(*v1,*v2);
|
| 42 |
if ((diff<maxR) && (diff<dR)) {
|
| 43 |
res = v2;
|
| 44 |
dR = diff;
|
| 45 |
}
|
| 46 |
}
|
| 47 |
}
|
| 48 |
return res;
|
| 49 |
}
|
| 50 |
|
| 51 |
//------------------------------------------------------------------------------------------------
|
| 52 |
template<class V1, class V2>
|
| 53 |
const V2 *MatchingTools::ClosestEtaPhiPt(const V1 *v1, const Collection<V2> &col, Double_t max)
|
| 54 |
{
|
| 55 |
// Return closest geometrical neighbor in eta-phi-pt within maximum delta of max.
|
| 56 |
|
| 57 |
const V2 *res = 0;
|
| 58 |
|
| 59 |
const UInt_t ents = col.GetEntries();
|
| 60 |
if (ents>0) {
|
| 61 |
Double_t d = 1e30;
|
| 62 |
for (UInt_t i = 0; i<ents; ++i) {
|
| 63 |
const V2 *v2 = col.At(i);
|
| 64 |
Double_t diff = MathUtils::DeltaR2(*v1,*v2);
|
| 65 |
Double_t ptd = 1-v1->Pt()/v2->Pt();
|
| 66 |
diff += ptd*ptd;
|
| 67 |
diff = TMath::Sqrt(diff);
|
| 68 |
if ((diff<max) && (diff<d)) {
|
| 69 |
res = v2;
|
| 70 |
d = diff;
|
| 71 |
}
|
| 72 |
}
|
| 73 |
}
|
| 74 |
return res;
|
| 75 |
}
|
| 76 |
}
|
| 77 |
#endif
|
