Updatesector
updatesector <x> <y> <gamevar>
Returns sector number of sector at (<x>,<y>) into gamevar <gamevar>. See updatesectorz. If it is not a valid sector (like outside the map or inside a column) it is set to -1. You may verify if the actual sector doens't equal to -1 before using getsector or you can get an warning in the log file.