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00001 #include "TrackingTools/TrajectoryState/interface/TrajectoryStateOnSurface.h"
00002 #include "TrackingTools/KalmanUpdators/interface/Chi2MeasurementEstimatorForTrackerHits.h"
00003 #include "TrackingTools/PatternTools/interface/MeasurementExtractor.h"
00004 #include "DataFormats/GeometrySurface/interface/BoundPlane.h"
00005 #include "DataFormats/Math/interface/invertPosDefMatrix.h"
00006 
00007 std::pair<bool,double> 
00008 Chi2MeasurementEstimatorForTrackerHits::estimate(
00009         const TrajectoryStateOnSurface& tsos,
00010         const TransientTrackingRecHit& aRecHit) const {
00011         if (!cacheUpToDate_) {
00012                 AlgebraicVector5 par5 = tsos.localParameters().vector();
00013                 tsosMeasuredParameters_[0] = par5[3]; 
00014                 tsosMeasuredParameters_[1] = par5[4]; 
00015                 const AlgebraicSymMatrix55 &err5 = tsos.localError().matrix();
00016                 tsosMeasuredError_ = err5.Sub<AlgebraicSymMatrix22>(3,3);
00017                 cacheUpToDate_ = true;
00018         }
00019         AlgebraicVector2     r = asSVector<2>(aRecHit.parameters())      - tsosMeasuredParameters_;
00020         AlgebraicSymMatrix22 R = asSMatrix<2>(aRecHit.parametersError()) + tsosMeasuredError_;
00021         invertPosDefMatrix(R);
00022         return returnIt( ROOT::Math::Similarity(r, R) );
00023 }
00024

/data/refman/pasoursint/CMSSW_5_3_1/src/TrackingTools/KalmanUpdators/src/Chi2MeasurementEstimatorForTrackerHits.cc