+
+ const Catalogue::ObjectMap &object_types = designer.get_catalogue().get_all();
+ for(Catalogue::ObjectMap::const_iterator i=object_types.begin(); i!=object_types.end(); ++i)
+ if(const TrackType *tt = dynamic_cast<const TrackType *>(i->second))
+ {
+ const vector<TrackPart> &parts = tt->get_parts();
+ if(parts.size()!=1)
+ continue;
+ if(parts.front().is_curved() || parts.front().is_dead_end())
+ continue;
+
+ types_by_length[parts.front().get_length()] = tt;
+ max_preference = max(max_preference, tt->get_autofit_preference());
+ }