--- a/src/buildings/helper/building-position-allocator.h	Tue Mar 20 18:02:56 2012 +0100
+++ b/src/buildings/helper/building-position-allocator.h	Tue Mar 20 18:33:42 2012 +0100
@@ -22,6 +22,7 @@
 
 #include <ns3/ptr.h>
 #include <ns3/position-allocator.h>
+#include <ns3/node-container.h>
 
 namespace ns3 {
 
@@ -82,6 +83,29 @@
 };
 
 
+/**
+ * Walks a given NodeContainer sequentially, and for each node allocate a new
+ * position randomly in the same room of that node
+ * 
+ */
+class SameRoomPositionAllocator : public PositionAllocator
+{
+public:
+  SameRoomPositionAllocator ();
+  SameRoomPositionAllocator (NodeContainer c);
+
+  // inherited from Object
+  static TypeId GetTypeId (void);
+
+  // inherited from PositionAllocator
+  virtual Vector GetNext (void) const;
+
+private:
+
+  NodeContainer m_nodes;
+  mutable NodeContainer::Iterator m_nodeIt;
+};
+
 
 } // namespace ns3