bug fix: reconstruction crash when the output buffer size exceed

[u/mrichter/AliRoot.git] / HLT / TPCLib / tracking-ca / AliHLTTPCCATrackConvertor.cxx

diff --git a/HLT/TPCLib/tracking-ca/AliHLTTPCCATrackConvertor.cxx b/HLT/TPCLib/tracking-ca/AliHLTTPCCATrackConvertor.cxx
index 600a0144942284af2aee10000ec52ea635646b84..cba11f872332ed6d8a87b7a189169ddfc2b98c9b 100644 (file)
--- a/HLT/TPCLib/tracking-ca/AliHLTTPCCATrackConvertor.cxx
+++ b/HLT/TPCLib/tracking-ca/AliHLTTPCCATrackConvertor.cxx
@@ -24,11 +24,13 @@
 #include "AliHLTTPCCAMath.h"
 
 
-void AliHLTTPCCATrackConvertor::GetExtParam( const AliHLTTPCCATrackParam &T1, AliExternalTrackParam &T2, double alpha )
+bool AliHLTTPCCATrackConvertor::GetExtParam( const AliHLTTPCCATrackParam &T1, AliExternalTrackParam &T2, double alpha )
 {
   //* Convert from AliHLTTPCCATrackParam to AliExternalTrackParam parameterisation,
   //* the angle alpha is the global angle of the local X axis
 
+  bool ok = T1.CheckNumericalQuality();
+
   double par[5], cov[15];
   for ( int i = 0; i < 5; i++ ) par[i] = T1.GetPar()[i];
   for ( int i = 0; i < 15; i++ ) cov[i] = T1.GetCov()[i];
@@ -47,7 +49,13 @@ void AliHLTTPCCATrackConvertor::GetExtParam( const AliHLTTPCCATrackParam &T1, Al
     cov[10] = -cov[10];
     cov[11] = -cov[11];
   }
+
+  if ( CAMath::Abs( par[4] ) < 1.e-5 ) par[4] = 1.e-5; // some other software will crash if q/Pt==0
+  if ( CAMath::Abs( par[4] ) > 1./0.08 ) ok = 0; // some other software will crash if q/Pt is too big
+
   T2.Set( ( double ) T1.GetX(), alpha, par, cov );
+
+  return ok;
 }
 
 void AliHLTTPCCATrackConvertor::SetExtParam( AliHLTTPCCATrackParam &T1, const AliExternalTrackParam &T2 )