| 1 |
econte |
1.1 |
#include "TrackingTools/PatternTools/interface/TSCBLBuilderWithPropagator.h"
|
| 2 |
|
|
#include "TrackingTools/GeomPropagators/interface/AnalyticalPropagator.h"
|
| 3 |
|
|
#include "TrackingTools/PatternTools/interface/TrajectoryExtrapolatorToLine.h"
|
| 4 |
|
|
#include "FWCore/MessageLogger/interface/MessageLogger.h"
|
| 5 |
|
|
|
| 6 |
|
|
using namespace std;
|
| 7 |
|
|
|
| 8 |
|
|
TSCBLBuilderWithPropagator::TSCBLBuilderWithPropagator (const MagneticField* field) :
|
| 9 |
|
|
thePropagator(new AnalyticalPropagator(field, anyDirection)) {}
|
| 10 |
|
|
|
| 11 |
|
|
TSCBLBuilderWithPropagator::TSCBLBuilderWithPropagator (const Propagator& u) :
|
| 12 |
|
|
thePropagator(u.clone())
|
| 13 |
|
|
{
|
| 14 |
|
|
thePropagator->setPropagationDirection(anyDirection);
|
| 15 |
|
|
}
|
| 16 |
|
|
|
| 17 |
|
|
|
| 18 |
|
|
TrajectoryStateClosestToBeamLine
|
| 19 |
|
|
TSCBLBuilderWithPropagator::operator()
|
| 20 |
|
|
(const FreeTrajectoryState& originalFTS,
|
| 21 |
|
|
const reco::BeamSpot& beamSpot) const
|
| 22 |
|
|
{
|
| 23 |
|
|
|
| 24 |
|
|
GlobalPoint bspos(beamSpot.position().x(), beamSpot.position().y(), beamSpot.position().z());
|
| 25 |
|
|
GlobalVector bsvec(beamSpot.dxdz(), beamSpot.dydz(), 1.);
|
| 26 |
|
|
Line bsline(bspos,bsvec);
|
| 27 |
|
|
|
| 28 |
|
|
TrajectoryExtrapolatorToLine tetl;
|
| 29 |
|
|
|
| 30 |
|
|
TrajectoryStateOnSurface tsosfinal = tetl.extrapolate(originalFTS,bsline,*thePropagator);
|
| 31 |
|
|
|
| 32 |
|
|
//Compute point on beamline of closest approach
|
| 33 |
|
|
GlobalPoint tp = tsosfinal.globalPosition(); //position of trajectory closest approach
|
| 34 |
|
|
GlobalVector hyp(tp.x() - bspos.x(),tp.y() - bspos.y(),tp.z() - bspos.z()); //difference between traj and beamline reference
|
| 35 |
|
|
double l=bsline.direction().dot(hyp); //length along beamline away from reference point
|
| 36 |
|
|
GlobalPoint closepoint = bspos + l*bsvec;
|
| 37 |
|
|
|
| 38 |
|
|
//Get the free state and return the TSCBL
|
| 39 |
|
|
const FreeTrajectoryState theFTS = *tsosfinal.freeState();
|
| 40 |
|
|
return TrajectoryStateClosestToBeamLine(theFTS, closepoint, beamSpot);
|
| 41 |
|
|
}
|
