diff -u -r1.3 -r1.4
--- CheatTrackDriver.java	13 Sep 2007 14:48:25 -0000	1.3
+++ CheatTrackDriver.java	16 Oct 2007 18:17:48 -0000	1.4
@@ -18,6 +18,8 @@

 import org.lcsim.event.MCParticle;
 import org.lcsim.event.base.*;
 import org.lcsim.event.SimTrackerHit;

+import hep.physics.vec.BasicHep3Vector;
+import hep.physics.vec.Hep3Vector;

 
 /**
  *

@@ -27,6 +29,7 @@

 {
     private final CheatTracker _tracker = new CheatTracker();
     String outname;

+    private static final Hep3Vector origin = new BasicHep3Vector();

     
     /** Creates a new instance of CheatTrackDriver */
     public CheatTrackDriver()

@@ -44,20 +47,21 @@

 
     protected void process(EventHeader event)
     {

+        double bField = event.getDetector().getFieldMap().getField(origin).z();

         List<List<SimTrackerHit>> collections = event.get(SimTrackerHit.class);
         for (List<SimTrackerHit> collection : collections)
         {

-            List<BaseTrackerHitMC> result = _tracker.createTrackerHits(collection);

+           List<BaseTrackerHitMC> result = _tracker.createTrackerHits(collection);

             
             String name = event.getMetaData(collection).getName();
             event.put(name+"CheatTrackerHits", result, BaseTrackerHitMC.class, 0);

-            Map<MCParticle,BaseTrackMC> result2 = _tracker.createTracks(result);

+            Map<MCParticle,BaseTrackMC> result2 = _tracker.createTracks(bField,result);

             int flag = (1<<LCIOConstants.TRBIT_HITS);
             event.put(name+"CheatTracks", new ArrayList(result2.values()), BaseTrackMC.class, flag);
         }
 
         List<List<BaseTrackMC>> tracks = event.get(BaseTrackMC.class);

-        Map<MCParticle, BaseTrackMC> refined = _tracker.findRefinedTracks(tracks);

+        Map<MCParticle, BaseTrackMC> refined = _tracker.findRefinedTracks(bField,tracks);

         int flag = 1<<LCIOConstants.TRBIT_HITS;
         event.put(outname, new ArrayList(refined.values()), BaseTrackMC.class, flag );
     }

diff -u -r1.1 -r1.2
--- CheatTracker.java	15 Feb 2007 18:29:51 -0000	1.1
+++ CheatTracker.java	16 Oct 2007 18:17:48 -0000	1.2
@@ -16,6 +16,7 @@

 import java.util.List;
 import java.util.ArrayList;
 import java.util.Map;

+import org.lcsim.mc.fast.tracking.DocaTrackParameters;

 
 /**
  *

@@ -29,14 +30,19 @@

     public CheatTracker()
     {
     }

-    public Map<MCParticle,BaseTrackMC> createTracks(List<BaseTrackerHitMC> l)

+    public Map<MCParticle,BaseTrackMC> createTracks(double B,List<BaseTrackerHitMC> l)

     {
         Map<MCParticle,BaseTrackMC> map = new HashMap<MCParticle,BaseTrackMC>();
         for(BaseTrackerHitMC h:l)
         {
             MCParticle p = h.mcParticles().get(0);
             BaseTrackMC cl = map.get(p);

-            if(cl == null)map.put(p,cl = new BaseTrackMC(p));

+            if(cl == null)
+            {
+                map.put(p,cl = new BaseTrackMC(p));
+                DocaTrackParameters dtp = new DocaTrackParameters(p, B);
+                cl.setTrackParameters(dtp.getTrackParameters(), B);
+            }

             cl.addHit(h);
         }
         return map;

@@ -51,7 +57,7 @@

         }
         return out;
     }

-    public Map<MCParticle, BaseTrackMC> findRefinedTracks(List<List<BaseTrackMC>> collections)

+    public Map<MCParticle, BaseTrackMC> findRefinedTracks(double B,List<List<BaseTrackMC>> collections)

     {
         Map<MCParticle, BaseTrackMC> result = new HashMap<MCParticle,BaseTrackMC>();
         for (List<BaseTrackMC> clusters : collections)

@@ -60,7 +66,11 @@

             {
                 MCParticle p = cluster.getMCParticle();
                 BaseTrackMC rc = result.get(p);

-                if (rc == null) result.put(p,rc = new BaseTrackMC(p));

+                if (rc == null)
+                {
+                    result.put(p,rc = new BaseTrackMC(p));
+                    rc.setTrackParameters(cluster.getTrackParameters(), B);
+                }

                 rc.addHits(cluster.getTrackerHits());
             }
         }