Collaborative Virtual Reality Environment

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Collaborative VR EnvironmentDeepak Kumar Singh-IHC2013004Sisir Kumar Sarkar-IHC2013005Indian Institute Of Information Technology- Allahabad1

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Virtual RealityVirtual Reality refers to a high-end user interface that involves real-time simulation and interactions through multiple sensorial channels.

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Virtual Reality EnvironmentA computer generated world with which user can interact is called Virtual EnvironmentThis interaction can vary from looking around to interactively modifying the world.

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Collaborative VR EnvironmentCVEs, 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.Indian Institute Of Information Technology- Allahabad4

CVE Architecture[1]5

1. Centralized primaries

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Centralized primaries-

All primary replicas of each data item resides on the same computer called server.

Advantages: complete server control over the sceneDisadvantages: performance is limited by the server computer

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2. Distributed primaries

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Distributed primaries

Primary replicas are distributed among the computers.

Advantages: high performance and scalabilityDisadvantages: difficult programming model, weaker consistencyIndian Institute Of Information Technology- Allahabad9

3. Data ownership

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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 PrimariesDisadvantages: high amount of ownership requests may limit the system performanceIndian Institute Of Information Technology- Allahabad11

4. Active replication

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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 systemIndian Institute Of Information Technology- Allahabad13

Popular Collaborative VR Environment[2]

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Social entertainment

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Indian Institute Of Information Technology- AllahabadEducation/Training

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Built environment: architectural walkthroughs

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Indian Institute Of Information Technology- AllahabadMedicine: surgery simulation

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Technology used

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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

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Cave Automatic Virtual Environment (CAVE)

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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.

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Advantages :

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Disadvantage :

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Recent Discoveries[3]

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DIVE[4]

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PlayStation MOVE[5]

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Research Group

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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.html5.University Of Minnesotahttp://vr.design.umn.edu/6.Stanford University(Virtual Human Interaction Lab)http://vhil.stanford.edu/

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Referenceshttp://en.wikipedia.org/wiki/Collaborative_virtual_environmenthttp://www.vrs.org.uk/virtual-reality-environments/collaborative.htmlCollaborative virtual environments: going beyond virtual reality, Roberta L. Gomes, Guillermo J. Multimedia and Expo, 2003. ICME '03. Proceedings. 2003 International Conference on(Volume:2 )https://www.durovis.com/dive.htmlhttp://us.playstation.com/ps3/playstation-move/http://vr.coe.ecu.edu/rave/RAVEtext.htm

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