On Mar 4, 2011, at 11:32 AM, Yang, Ming wrote: > Yes, my question on agent portrayal can apply to arbitrary objects > portrayal also. > I think I have gotten my answer. The main point is the method > "setupPortrayals()" in GUIState does not need to know exactly what are > the objects or the number of the objects. It needs only to know the > classifications such as the classes of the objects then it uses > "setPortrayalForClass(..)" or " setPortrayalForAll(...) to tell the > way > to portrayal them. Right. Or a few other method options (or if the objects are themselves SimplePortrayals, it'll just use them). Sean