ABSTRACTIn this paper, we present a novel idea to integrate a low cost inertial measurement unit (IMU) and

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virtual actor control for such interactive cinema or As multimedia services have been generalized, users wish to interact with service providers while converting services as desired rather than being provided with oneside services. The present paper is related to the scriptbased virtual actor control for interactive drama or interactive cinema which is a kind of such applications. The entire system is in the form of the clientkerver, where the client generates scenario graphs, which are a type of scripts, after receiving various scenario information for developing stories fiom the server providing services, and generates and shows other scenes according to the conversation with and action of the user while traversing generated graphs. Information on the movement of virtual actor are all stored in the form of files, and are animated through the motion generation engine whenever they are necessary -while traversing generated scenario graphs.

Exposure therapy is a clinical treatment based on gradual and systematical exposure of the phobic people to the feared object or situation a little at a time. Through the repeated rehearsals, their fear decreases little by little and they become more comfortable with the stimuli. For this purpose, we developed V-Theme Park -an immersive virtual environment, in which the patients themselves construct virtual worlds with the stimuli bothering them in the real world. Our V-Theme Park includes virtual environments of flying, driving, diving and virtual objects of spider, snake and so on. This involves exposing the psychologically disordered patients to a virtual environment containing the feared stimulus in place of taking the patients into a real environment or having the patient imagine the stimulus. Due to weak background on this medical field we don't have well-established clinical results yet. This paper describes the considerations and implementation of a treatment system with virtual environments and its authoring tool for fear diminishment and the feasibility tests that were performed to a panic patient in mild symptom. The user can test the fear about the authored environments by himself through the Internet, because V-Theme Park is saved as a VRML file. We constructed bungee jump, road, and elevator contents and in our study VR exposure therapy was shown to be very effective in reducing the fear of diving, driving, and high elevation.