X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=HMPID%2FAliHMPIDtrack.cxx;h=4a1d615ff4e4f74d4dd09f7c22ea8a2c3161826b;hb=1fc96a8a6e447e7cbc5775a67265b313b17309dd;hp=0168713794acfae81fb9e15254f8d7ab42e9ce8f;hpb=97a4d5386a1e8114730e7a1af54cd9f135ee8ccd;p=u%2Fmrichter%2FAliRoot.git

diff --git a/HMPID/AliHMPIDtrack.cxx b/HMPID/AliHMPIDtrack.cxx
index 0168713794a..4a1d615ff4e 100644
--- a/HMPID/AliHMPIDtrack.cxx
+++ b/HMPID/AliHMPIDtrack.cxx
@@ -71,8 +71,8 @@ Bool_t AliHMPIDtrack::PropagateTo(Double_t xk, Double_t xx0, Double_t xrho)
   if (xk == GetX()) {
     return kTRUE;
   }
-  Double_t bz   = GetBz();
-  if (!AliExternalTrackParam::PropagateTo(xk,bz)) {
+  Double_t b[3]; GetBxByBz(b);
+  if (!AliExternalTrackParam::PropagateToBxByBz(xk,b)) {
     return kFALSE;
   }
   if (!AliExternalTrackParam::CorrectForMeanMaterial(xx0,xrho,GetMass())) { 
@@ -190,15 +190,15 @@ Bool_t AliHMPIDtrack::PropagateTo(const AliCluster3D *c) {
   Double_t      p[3]={c->GetX(), c->GetY(), c->GetZ()};
   Double_t  covyz[3]={c->GetSigmaY2(), c->GetSigmaYZ(), c->GetSigmaZ2()};
   Double_t covxyz[3]={c->GetSigmaX2(), c->GetSigmaXY(), c->GetSigmaXZ()};
-  Double_t bz=GetBz();
-  
+  Double_t bz=-GetBz();
+    
   if(!AliExternalTrackParam::PropagateTo(p, covyz, covxyz, bz)) return kFALSE;
   if(IsStartedTimeIntegral()) 
     {
       Double_t d = TMath::Sqrt((GetX()-oldX)*(GetX()-oldX) + (GetY()-oldY)*(GetY()-oldY) + (GetZ()-oldZ)*(GetZ()-oldZ));
       if (GetX()<oldX) d=-d;
       AddTimeStep(d);
-  }
+    }
   return kTRUE;
 }//PropagateTo()
 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
@@ -244,7 +244,7 @@ void AliHMPIDtrack::Propagate(Double_t len, Double_t x[3],Double_t p[3]) const {
   GetXYZ(x);    
   Double_t bField[3];
   TGeoGlobalMagField::Instance()->Field(x,bField);
-  Double_t bz = bField[2];
+  Double_t bz = -bField[2];
   if (OneOverPt() < kAlmost0 || TMath::Abs(bz) < kAlmost0Field ){ //straight-line tracks
      Double_t unit[3]; GetDirection(unit);
      x[0]+=unit[0]*len;