Manipulating Objects Behind Obstacles

This paper describes various techniques of accessing objects hidden behind obstacles in virtual environments. We show some of well known interaction techniques that are suitable for usage in this case. Next, we introduce new Head Manipulator method and several aids that allow a user to change the visibility of objects. We propose several combinations of interaction techniques and discuss their suitability for the given task. Finally, we describe our experiments when testing these methods and then we conclude with the results from the experiments and from users' observations.

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