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Viewpoint adaptation during navigation based on stimuli from the virtual environment

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Viewpoint adaptation during navigation based on stimuli from the virtual environment

Content Provider	ACM Digital Library
Author	Nijholt, Anton Kiss, Szilárd
Abstract	We consider the possibility of automatically modifying the user's viewpoint orientation for the purpose of enhancing the navigation experience. We concentrate on outdoor virtual environments where the terrain is uneven as well as certain cases of indoor at environment floors, respectively on environments where focus-drawing objects and different types of obstacles exist. Most natural environments present these properties and virtual environments that are based on natural environments are in abundance. The navigational adjustments are introduced as response to environment stimuli such as slope changes, the emergence of visibility rays to focus objects or as navigational difficulty events occur after encounters with nonoversteppable obstacles. A scheme is presented that facilitates the viewpoint orientation feature. Conceptually, the viewpoint orientation is a method of partially and temporarily decoupling the head movements from the navigation direction. Virtual environments in general and their encoding in VRML, X3D, Java3D as well as other scenegraphs are analyzed to reveal bottlenecks in current scenegraphs that make the implementation of such automatic adjustments from difficult to impossible, needing custom navigational code where possible. Different scenarios are presented, where these adjustments can prove useful by speeding up the navigation and providing a higher quality, richer experience. Additional to relevant literature, further experiments are necessary to analyze the effect of automatic view adjustments on the user's immersiveness experience and direction sense (path finding), experiments which could be carried out using custom navigational interfaces incorporating head movement extensions separated from the navigational data, extensions proposed in this paper.
Starting Page	19
Ending Page	26
Page Count	8
File Format	PDF
ISBN	1581136447
DOI	10.1145/636593.636597
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2003-03-09
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Virtual environments. Navigation Automatic viewpoint adaptation Attention
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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