diff -u -r1.2 -r1.3
--- ThinXYPlaneMs.java	7 Mar 2005 06:11:13 -0000	1.2
+++ ThinXYPlaneMs.java	11 Sep 2007 05:34:47 -0000	1.3
@@ -8,8 +8,8 @@

 import org.lcsim.recon.tracking.trfbase.TrackError;
 import org.lcsim.recon.tracking.trfbase.TrackVector;
 import org.lcsim.recon.tracking.trfbase.Surface;

-import org.lcsim.recon.tracking.trfbase.VTrack;

 import org.lcsim.recon.tracking.trfbase.Interactor;

+import org.lcsim.recon.tracking.trfbase.PropDir;

 /**
  *
  * Class for modifying the covariance matrix of a track to account

@@ -159,6 +159,12 @@

         
     }
     

+    // method for adding the interaction with direction
+    public void interact_dir(ETrack tre, PropDir dir)
+    {
+        interact(tre);
+    }
+    

     /**
      *Return the number of radiation lengths.
      *