// create any zone-specific data necessary for all zones for the given node
	void PCZSceneManager::createZoneSpecificNodeData(PCZSceneNode * node)
	{
		ZoneMap::iterator i;
		PCZone * zone;
		for (i = mZones.begin(); i != mZones.end(); i++)
		{
			zone = i->second;
			if (zone->requiresZoneSpecificNodeData())
			{
				zone->createNodeZoneData(node);
			}
		}		
	}