Switching to a linear formula in the case of straight tracks.

Cherry-picked from 03bec31
sevdokim · Jun 7, 2016 · 03815fb · 03815fb
1 parent b5efba5
commit 03815fb
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/STEER/STEERBase/AliExternalTrackParam.cxx b/STEER/STEERBase/AliExternalTrackParam.cxx
@@ -1562,6 +1562,9 @@ static void Evaluate(const Double_t *h, Double_t t,
   if (TMath::Abs(h[4])>kAlmost0) {
      r[0] += (sn - h[6])/h[4];
      r[1] -= (cs - h[7])/h[4];  
+  } else {
+     r[0] += t*cs;
+     r[1] -= -t*sn;  
   }
   r[2] = h[1] + h[3]*t;