Distortion in Distributed Virtual Environments

  • Matthew D. Ryan
  • Paul M. Sharkey
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1434)


This paper proposes a solution to the problems associated with network latency within distributed virtual environments. It begins by discussing the advantages and disadvantages of synchronous and asynchronous distributed models, in the areas of user and object representation and user-to-user interaction. By introducing a hybrid solution, which utilises the concept of a causal surface, the advantages of both synchronous and asynchronous models are combined. Object distortion is a characteristic feature of the hybrid system, and this is proposed as a solution which facilitates dynamic real-time user collaboration. The final section covers implementation details, with reference to a prototype system available from the Internet.


distributed virtual environments network latency collaboration interaction multi-user virtual reality 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Roberts, D. J., Sharkey, P. M.: Maximising Concurrency and Scalability in a Consistent, Causal, Distributed Virtual Reality System, Whilst Minimising the Effect of Network Delays. Proc IEEE 6th Workshops Enabling Tech: Infrastruct. Collab. Enterprises (WETICE’ 97), Boston (Jun. 1997)Google Scholar
  2. 2.
    Sharkey, P. M., Ryan, M. D., Roberts, D. J.: A Local Perception Filter for Distributed Virtual Environments. Proc IEEE VRAIS’ 98, Atlanta, GA, (Mar. 1998) 242–249Google Scholar
  3. 3.
    Sharkey, P. M., Roberts, D. J., Sandoz, P. D., Cruse, R.: A Single-user Perception Model for Multi-user Distributed Virtual Environments. Proc. Int. Workshop Collaborative Virtual Environments, Nottingham, UK, (Jun. 1996)Google Scholar
  4. 4.
    Ryan, M. D., Sharkey, P. M.: Causal Volumes in Distributed Virtual Reality. Proc. IEEE Int. Conf. Syst Man Cybernetics, Orlando, FL (Oct. 1997) 1064–1072Google Scholar
  5. 5.
    Ellis, F. R., Williams, R. M.: Flat and Curved Space-Times, Clarendon Press, Oxford (1988)Google Scholar
  6. 6.
    Franklin, G.F., Powell, J.D., Emami-Naeini, A.: Feedback Control of Dynamic Systems. Addison-Wesley (1986)Google Scholar
  7. 7.
    Broll, W.: Interacting in Distributed Collaborative Virtual Environments. Proc. VRAIS’ 95, North Carolina, (Mar. 1995)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • Matthew D. Ryan
    • 1
  • Paul M. Sharkey
    • 1
  1. 1.Interactive Systems Research Group Department of CyberneticsThe University of ReadingWhiteknights, ReadingUK

Personalised recommendations