NetLogo/Galapagos — pull request #109 by qiemem (2014-01-03 05:13:10+00:00)
Title: Support watch

Need a hook for watching and unwatching turtles (well, the unwatch is "reset-perspective", so you could definitely implement it as clearing all watching). The engine will keep track of "subject" and which turtles are actually currently being watched.