Changes in external/TrackCovariance/ObsTrk.cc [942a705:a0f5d71] in git

File:

• external/TrackCovariance/ObsTrk.cc (modified) (3 diffs)

external/TrackCovariance/ObsTrk.cc

@@ -20 +20 @@
         fGenPar.ResizeTo(5);
         fGenParACTS.ResizeTo(6);
+        fGenParILC.ResizeTo(5);
         fObsPar.ResizeTo(5);
         fObsParACTS.ResizeTo(6);
+        fObsParILC.ResizeTo(5);
         fCov.ResizeTo(5, 5);
         fCovACTS.ResizeTo(6, 6);
+        fCovILC.ResizeTo(5, 5);
         fGenPar = XPtoPar(x,p,Q);
         fGenParACTS = ParToACTS(fGenPar);
+        fGenParILC = ParToILC(fGenPar);
         /*
         std::cout << "ObsTrk::ObsTrk: fGenPar";
@@ -33 +37 @@
         fObsPar = GenToObsPar(fGenPar, fGC);
         fObsParACTS = ParToACTS(fObsPar);
+        fObsParILC = ParToILC(fObsPar);
         fObsX = ParToX(fObsPar);
         fObsP = ParToP(fObsPar);
         fObsQ = ParToQ(fObsPar);
         fCovACTS = CovToACTS(fCov);
+        fCovILC = CovToILC(fCov);
 }
 //
@@ -206 +212 @@
 }
 
+// Parameter conversion to ILC format
+TVectorD ObsTrk::ParToILC(TVectorD Par)
+{
+        TVectorD pILC(5);       // Return vector
+        //
+        pILC(0) = Par(0)*1.0e3;                 // d0 in mm
+        pILC(1) = Par(1);                               // phi0 is unchanged
+        pILC(2) = -2 * Par(2)*1.0e-3;   // w in mm^-1
+        pILC(3) = Par(3)*1.0e3;                 // z0 in mm
+        pILC(4) = Par(4);                               // tan(lambda) = cot(theta)
+        //
+        return pILC;
+}
+// Covariance conversion to ILC format
+TMatrixDSym ObsTrk::CovToILC(TMatrixDSym Cov)
+{
+        TMatrixDSym cILC(5); cILC.Zero();
+        //
+        // Fill derivative matrix
+        TMatrixD A(5, 5);       A.Zero();
+        //
+        A(0, 0) = 1.0e3;                // D-d0 in mm
+        A(1, 1) = 1.0;          // phi0-phi0
+        A(2, 2) = -2.0e-3;      // w-C
+        A(3, 3) = 1.0e3;                // z0-z0 conversion to mm
+        A(4, 4) = 1.0;          // tan(lambda) - cot(theta)
+        //
+        TMatrixDSym Cv = Cov;
+        TMatrixD At(5, 5);
+        At.Transpose(A);
+        Cv.Similarity(At);
+        cILC = Cv;
+        //
+        return cILC;
+}
+