09-jul-2001 NvE Support for impact points and user identifier introduced in AliTrack.

[u/mrichter/AliRoot.git] / RALICE / AliPosition.cxx

diff --git a/RALICE/AliPosition.cxx b/RALICE/AliPosition.cxx
index 94541f701fbf62bdfa4b993be5d6182507a74a5a..e20f1b97bfdb4e0c09c6102d1a7a681ad99f6f70 100644 (file)
--- a/RALICE/AliPosition.cxx
+++ b/RALICE/AliPosition.cxx
@@ -131,3 +131,14 @@ void AliPosition::GetPositionErrors(Float_t* r,TString f)
  GetErrors(r,f);
 }
 ///////////////////////////////////////////////////////////////////////////
+Double_t AliPosition::GetDistance(AliPosition& p)
+{
+// Provide distance to position p.
+// The error on the result can be obtained as usual by invoking
+// GetResultError() afterwards. 
+ Ali3Vector d=(Ali3Vector)((*this)-p);
+ Double_t dist=d.GetNorm();
+ fDresult=d.GetResultError();
+ return dist;
+}
+///////////////////////////////////////////////////////////////////////////