diff -u -r1.2 -r1.3
--- DiskTrackerConverter.java	26 Mar 2007 17:45:44 -0000	1.2
+++ DiskTrackerConverter.java	26 Mar 2007 18:12:30 -0000	1.3
@@ -61,11 +61,13 @@

             double layerOuterRadius = tracker.getOuterR()[i];
             double layerInnerZ = tracker.getInnerZ()[i];
 

+            System.out.println("thick="+layer.getThickness());            
+            

             Tube layerTube = new Tube(
                     name + "_layer" + i,
                     layerInnerRadius,
                     layerOuterRadius,

-                    layer.getThickness());

+                    layer.getThickness()/2);

 
             LogicalVolume layerLV = new LogicalVolume(
                     name + "_layer" + i,

@@ -103,9 +105,10 @@

                         i);                                       
             }                 
 

-            double sliceZ = -layer.getThickness();

+            double sliceZ = -layer.getThickness()/2;

             for (int j=0; j<layer.getNumberOfSlices(); j++)
             {

+                System.out.println("sliceZ="+sliceZ);

                 LayerSlice slice = layer.getSlice(j);
                 double sliceThickness = slice.getThickness();
                 IMaterial sliceMaterial = 

@@ -115,7 +118,7 @@

                     new Tube(name + "_layer" + i + "_slice"+j,
                             layerInnerRadius,
                             layerOuterRadius,

-                            sliceThickness);

+                            sliceThickness/2);

 
                 LogicalVolume sliceLV =
                     new LogicalVolume(