Collaborative Virtual Reality Environment
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This document discusses collaborative virtual reality (VR) environments. It describes how collaborative VR allows many participants to interact and collaborate in shared virtual worlds over large distances. It outlines four common architectures for collaborative VR - centralized primaries, distributed primaries, data ownership, and active replication. Examples of applications include social entertainment, education, architectural walkthroughs, and medical training. Technologies discussed include VRML and devices like BOOM and CAVE. Recent developments mentioned are DIVE and PlayStation Move controllers. Research groups in the field are also listed.
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Collaborative Virtual Reality Environment
- 1. Collaborative VR Environment Deepak Kumar Singh-IHC2013004 Sisir Kumar Sarkar-IHC2013005 Indian Institute Of Information Technology- Allahabad 1
- 2. Virtual Reality • Virtual Reality refers to a high-end user interface that involves real-time simulation and interactions through multiple sensorial channels. IndianInstituteOfInformationTechnology-Allahabad 2
- 3. Virtual Reality Environment • A computer generated world with which user can interact is called Virtual Environment • This interaction can vary from looking around to interactively modifying the world. IndianInstituteOfInformationTechnology-Allahabad 3
- 4. Collaborative VR Environment • CVEs, are used for collaboration and interaction of possibly many participants that may be spread over large distances. • The applications are usually based on the shared virtual environment. IndianInstituteOfInformationTechnology-Allahabad 4
- 7. Centralized primaries- • All primary replicas of each data item resides on the same computer called server. • Advantages: complete server control over the scene • Disadvantages: performance is limited by the server computer 7 IndianInstituteOfInformationTechnology-Allahabad
- 9. Distributed primaries • Primary replicas are distributed among the computers. • Advantages: high performance and scalability • Disadvantages: difficult programming model, weaker consistency IndianInstituteOfInformationTechnology-Allahabad 9
- 11. Data ownership • Primaries are allowed to migrate among the computers. This approach is often called system with transferable data ownership. • Advantages: more flexibility compared to Distributed Primaries • Disadvantages: high amount of ownership requests may limit the system performance IndianInstituteOfInformationTechnology-Allahabad 11
- 13. Active replication • Active replication uses peer-to-peer approach while all replicas are equal. Usually, atomic broadcast is used to deliver updates to all of them, thus they are kept synchronized. • Advantages: complete scene synchronization (equal scene content on all computers) • Disadvantages: the performance is limited by the slowest computer in the system IndianInstituteOfInformationTechnology-Allahabad 13
- 17. IndianInstituteOfInformationTechnology-Allahabad Built environment:architectural walkthroughs 17
- 20. Binocular Omni-Orientation Monitor (BOOM) Head-coupled stereoscopic display device. Uses CRT to provide high-resolution display. Convenient to use. Fast and accurate built-in tracking IndianInstituteOfInformationTechnology-Allahabad 20
- 21. Cave Automatic Virtual Environment (CAVE) IndianInstituteOfInformationTechnology-Allahabad 21
- 22. VRML(Virtual Reality Modeling Language) Standard language for interactive simulation within the World Wide Web. Allows to create "virtual worlds" networked via the Internet and hyperlinked with the World Wide Web. Aspects of virtual world display, interaction and internetworking can be specified using VRML without being dependent on special gear like HMD. • VR models can be viewed by Netscape or IE with a browser plug-in. IndianInstituteOfInformationTechnology-Allahabad 22
- 23. Advantages : Save time NO to Loneliness Work in a Team IndianInstituteOfInformationTechnology-Allahabad 23
- 24. Disadvantage : Initial cost is High Increases Unemployment Prolong usage may cause Psychological or Mental Stress IndianInstituteOfInformationTechnology-Allahabad 24
- 29. 1.Advanced VR Research Centre (AVRRC) Loughborough University, UK http://www.lboro.ac.uk/research/avrrc/ 2. National Center for Supercomputing Applications (NCSA) [6] -Argonne National Laboratory -Alliance Center for Collaboration, Education, Science and Software (ACCESS) 3.Immersive Interaction Group http://iig.epfl.ch/ 4.Swiss Federal Institute of Technology http://archiveweb.epfl.ch/vrlab.epfl.ch/research/research_index.html 5.University Of Minnesota http://vr.design.umn.edu/ 6.Stanford University(Virtual Human Interaction Lab) http://vhil.stanford.edu/ IndianInstituteOfInformationTechnology-Allahabad 29
- 30. References 1. http://en.wikipedia.org/wiki/Collaborative_virtual_environment 2. http://www.vrs.org.uk/virtual-reality- environments/collaborative.html 3. Collaborative virtual environments: going beyond virtual reality, Roberta L. Gomes, Guillermo J. Multimedia and Expo, 2003. ICME '03. Proceedings. 2003 International Conference on (Volume:2 ) 4. https://www.durovis.com/dive.html 5. http://us.playstation.com/ps3/playstation-move/ 6. http://vr.coe.ecu.edu/rave/RAVEtext.htm IndianInstituteOfInformationTechnology-Allahabad 30