Shared 3D World WYSIWYG Contruction toolkit "Sim City" like simulation Messaging system message in a bottle broadcast for recipient only "you have mail" in a bottle cool game in a bottle "Ring World", etc Avatars for users chat between users Real estate agency Sound, music, midi Growing things time based shrubery Inverse causality Sim net Dead reckoning Interaction between people and objects triggered behaviors car alarm dog alarm house alarm Laws Responsiveness Behaviors Protocol for adding objects Where are we map overview view you are here XML, DB Representations Tree structure Locality based Standards expandable Weather virtual real Lego sculptures "dat files" parser Terrian rivers bridges mountains hills vallieys islands clouds chutes and ladders floating island Server timestamp Own representation Server simulation Stateless Persistent parametizable "thing" Adding to the world Reflection Serialized objects Renderer Bounding boxes Things you might want to make for this assignment growing thing moss etc sound thing home/residence pets structures monuments light houses rocks treescommunication between userschat pneumatic tube delivery service furniture wall art road signs alphabet