From 18f657008d6fa598b534cff2d135c3950358687d Mon Sep 17 00:00:00 2001
From: cvetan <cvetan@f7af4fe6-9843-0410-8265-dc069ae4e863>
Date: Wed, 18 Mar 2009 15:17:04 +0000
Subject: [PATCH] Added AddTrackParams() method for convenience + some comments

---
 STEER/AliRelAlignerKalman.cxx | 11 +++++++++++
 STEER/AliRelAlignerKalman.h   |  1 +
 2 files changed, 12 insertions(+)

diff --git a/STEER/AliRelAlignerKalman.cxx b/STEER/AliRelAlignerKalman.cxx
index d81808f81be..b9f538ec03b 100644
--- a/STEER/AliRelAlignerKalman.cxx
+++ b/STEER/AliRelAlignerKalman.cxx
@@ -317,6 +317,15 @@ Bool_t AliRelAlignerKalman::AddESDtrack( const AliESDtrack* pTrack )
   return kFALSE;
 }
 
+//______________________________________________________________________________
+Bool_t AliRelAlignerKalman::AddTrackParams( const AliExternalTrackParam* p1, const AliExternalTrackParam* p2 )
+{
+  //Update the estimate using new matching tracklets
+
+  if (!SetTrackParams(p1, p2)) return kFALSE;
+  return Update();
+}
+
 //______________________________________________________________________________
 Bool_t AliRelAlignerKalman::AddCosmicEvent( const AliESDEvent* pEvent )
 {
@@ -690,6 +699,8 @@ Bool_t AliRelAlignerKalman::IsOutlier( const TVectorD& update, const TMatrixDSym
 //______________________________________________________________________________
 Bool_t AliRelAlignerKalman::IsPositiveDefinite( const TMatrixD& mat ) const
 {
+  //check for positive definiteness
+
   for (Int_t i=0; i<mat.GetNcols(); i++)
   {
     if (mat(i,i)<=0.) return kFALSE;
diff --git a/STEER/AliRelAlignerKalman.h b/STEER/AliRelAlignerKalman.h
index aa7b2870983..cc16cf78cf6 100644
--- a/STEER/AliRelAlignerKalman.h
+++ b/STEER/AliRelAlignerKalman.h
@@ -32,6 +32,7 @@ public:
 
     //User methods:
     Bool_t AddCosmicEvent( const AliESDEvent* pEvent );
+    Bool_t AddTrackParams( const AliExternalTrackParam* p1, const AliExternalTrackParam* p2 );
     
     void Print(Option_t* option="") const;
 
-- 
2.31.1