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The design and implementation of interactions in 3D environments remains a challenge. This is especially true for novices. Mechanisms to support the creation of interaction have been developed, but they lack a central metaphor that fits the natural way in which developers conceptualize interaction techniques. In this paper, the authors introduce a new framework whose design mirrors the essence of interaction throughout the Virtual Reality spectrum, where the user is literally in the center. It also reflects the way in which interactions are actually understood and described, based on the interactor and her actions.
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