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ABSTRACT

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, we 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.

Based on the central metaphor of the interactor, an implementation that is composed of three phases is developed. Those phases are: input retrieval and shaping, interpretation of user intentions, and execution of changes to the environment. Through these divisions, software requirements like composition and reusability of components are satisfied. The resultant system ACTIF, an ACTor centric Interaction Framework, structures interaction development in a meaningful and understandable way and at the same time eases the design and creation of new and experimental interactions.

REFERENCES

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• 2: Figueroa, P., Green, M., and Watson, B. 2001. A Framework for 3D Interaction Techniques. In CAD/Graphics'2001 August 22--24, International Academic Publishers, Kunming, China.
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• 5: Paul S. Strauss, IRIS Inventor, a 3D graphics toolkit, Proceedings of the eighth annual conference on Object-oriented programming systems, languages, and applications, p.192-200, September 26-October 01, 1993, Washington, D.C., United States
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• 7: Wingrave, C. A., and Bowman, D. A. 2008. Tiered Developer-Centric Representations for 3D Interfaces: Concept-Oriented Design in Chasm. In IEEE Virtual Reality Conference, 2008. VR '08., IEEE, 193--200.

INDEX TERMS

Primary Classification:
  H. Information Systems
  H.5 INFORMATION INTERFACES AND PRESENTATION (I.7)
      H.5.2 User Interfaces (D.2.2, H.1.2, I.3.6)

Additional Classification:
  I. Computing Methodologies
  I.3 COMPUTER GRAPHICS
      I.3.6 Methodology and Techniques
      I.3.7 Three-Dimensional Graphics and Realism

Keywords:
3D user interfaces, user centered HCI, virtual reality