diff -u -r1.3 -r1.4
--- VRML2Writer.cc	9 Jul 2009 18:24:36 -0000	1.3
+++ VRML2Writer.cc	9 Jul 2009 20:57:43 -0000	1.4
@@ -1,4 +1,4 @@

-// $Header: /cvs/lcd/slic/src/VRML2Writer.cc,v 1.3 2009/07/09 18:24:36 jeremy Exp $

+// $Header: /cvs/lcd/slic/src/VRML2Writer.cc,v 1.4 2009/07/09 20:57:43 jeremy Exp $

 #include "VRML2Writer.hh"
 
 // stl

@@ -54,24 +54,36 @@

 
     void VRML2Writer::processPhysicalVolume(G4VPhysicalVolume* pv)
     {

-        writeLine("Transform {");

+        writeLine("DEF " + pv->GetName() + " Transform {");

         indent();
         writeLine("children [");
         indent();
 

-        // shape node
-        writeLine("Shape {");
-        indent();
-        processVisualization(pv);
-        processSolid(pv->GetLogicalVolume()->GetSolid());
-        unindent();
-        writeLine("}");

+        // shape node for each physical volume
+        const G4VisAttributes* vis = pv->GetLogicalVolume()->GetVisAttributes();
+        bool show = true;
+        if (vis && !vis->IsVisible()) show = false;
+        if (show) 
+        {
+            writeLine("DEF " + pv->GetName() + " Shape {");
+            indent();
+            processVisualization(pv);
+            processSolid(pv->GetLogicalVolume()->GetSolid());
+            unindent();
+            writeLine("}");
+        }

 
         G4LogicalVolume* lv = pv->GetLogicalVolume();

-

+        

         // Recurse through daughter volumes

-        for (int i=0, ndau=lv->GetNoDaughters(); i < ndau; i++) {           
-            processPhysicalVolume(lv->GetDaughter(i));

+        bool showDaughters = true;
+        if (vis && vis->IsDaughtersInvisible()) showDaughters = false;
+        if (showDaughters)
+        {
+            for (int i=0, ndau=lv->GetNoDaughters(); i < ndau; i++) 
+            {           
+                processPhysicalVolume(lv->GetDaughter(i));
+            }

         }
 
         unindent();

@@ -117,7 +129,7 @@

         std::stringstream ss;
         ss << r << " " << g << " " << b;
         writeLine("diffuseColor " + ss.str());

-        writeLine("transparency 0.7");

+        writeLine("transparency 0.0"); // use viewer like Deep View to get a wireframe or transparent view

         unindent();
         writeLine("}");        
         unindent();