Computers as theatre
Scenario-based hypermedia: a model and a system
Hypertext: concepts, systems and applications
A guide to metaphorical design
Communications of the ACM
Hyper/Text/Theory
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Dynamic phase-spaces are suggested as a way ofdesigning and implementing interactive multimedia systems. Adynamic phase-space is a space of properties overlayed withdynamics. The space is “decorated” with multimedia resourcessuch as pictures, music, sound-effects, speech, and movies.This architecture may help resolve the basic problem ofinteractive systems, namely that both user and author need toinfluence the system. If the user is passive, the system is notinteractive, but if the author has no power, no interestingnarratives can be told. But how can two or more people influencethe same system at the same time?The solution presented in the paper is that the system objectsare controlled by a global dynamics and neither party is allowedto influence the objects directly; they may only influenceobjects indirectly by perturbing the global dynamics. In this way, contradictory inputs from user and author have a well-defined solution.The paper describes an experimental museum installation thatimplements these ideas. In addition, a set of interactiverhetorical patterns are defined and exemplified. The maintheoretical inspiration of the system is Thom‘s catastrophetheory, although it is not used in a literal sense.