+void Layout::sensor_event(unsigned addr, bool state)
+{
+ if(state)
+ {
+ for(set<Block *>::iterator i=blocks.begin(); i!=blocks.end(); ++i)
+ if((*i)->get_sensor_id()==addr)
+ {
+ if(!(*i)->get_train())
+ emergency(format("Unreserved sensor %d triggered", addr));
+ break;
+ }
+ }
+}
+