Tutorial 8: Interaction in distributed virtual environments
Tuesday, August 30th, 2005. 08:30 - 12:30 (Half Day)
VENUE: Swift Theatre.
| ORGANISER: |
Mashhuda Glencross, The University of Manchester
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| SPEAKERS: |
Alan Chalmers (U. of Bristol)
Mashhuda Glencross (U. of Manchester)
Miguel Otaduy (ETH Zurich)
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Outline and Syllabus
This course will describe the main challenges faced when building engaging shared virtual
environments supporting complex behaviour and interaction, and provide discussions on techniques
that can be adopted to support some of these. In order to build such environments, it is necessary to
combine high quality graphics, better modes of interaction, rich behavioural simulations and appropriate distribution strategies.
After introducing the field of interaction and rich behavior in collaborative virtual environments,
we cover the main issues in three parts. First we look at techniques for improving the user's
experience by using high-fidelity graphical rendering, and explore how this may be achieved in real-
time through exploitation of features of the human visual perception system. We examine also how
additional sensory modalities such as audio and haptic rendering may further improve this
experience. Second we consider issues of distribution with an emphasis on avoiding potential
pitfalls when distributing complex simulations together with an analysis of real network conditions
and the implications of these for distribution architectures that provide for shared haptic interaction.
Finally we present the current state of the art of haptic interaction techniques. In particular the
motivations for perceptually-inspired force models for haptic texture rendering, interaction between
such models and GPU techniques for fast haptic texture rendering.
The objective of this course is to give an introduction to the issues to consider when building highly
engaging interactive shared virtual environments, and techniques to mediate complex haptic
interaction with sophisticated 3D environments.
- Introduction - Glencross (20 mins)
- Complex Interaction in Shared Virtual Environments
- Behaviourally Rich Shared Virtual Environments
-
Perceptually Based Graphical Rendering - Chalmers (45 mins)
- High Fidelity Graphics
- Performance Considerations
- Effects on Task Performance
- Selective Rendering
- Visual Perception
- In-attentional Blindness
- Task and Saliency Maps
- Perceptual Realism in Real-Time
-
Interaction in Distributed Virtual Environments (I) - Glencross (55 mins)
- Effects of Haptic Feedback on Task-Performance
- Collaborative experimental Studies
- Main Challenges
- Classes of Interaction in Shared Virtual Environments
- Common Shared Interaction Modes
- Distributing Simulations
- Real Networks
- Considerations for Behaviourally Rich Distributed Haptic Environments
- A Brief Survey of the State of the Art of Collaborative Haptic Environments
- Putting it All Together
- State of the Art of Haptic Interaction Techniques - Miguel Otaduy (75 mins)
- Fundamentals of Haptic Rendering
- Techniques for Six-Degree-of-Freedom Haptic Rendering
- Sensation Preserving Simplification of Complex Geometry
- Perceptually Driven Force Models
- Haptic Texture Rendering
- GPU-based Implementation
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General discussion/questions - ALL (15 mins)
Presenter Information
Alan Chalmers is Professor of computer graphics at The University of Bristol, United Kingdom. He
has published over one hundred papers on high fidelity graphics, parallel rendering, visual
perception, and virtual archaeology in journals and international conferences. Alan is also a former
Vice President and current Presidential candidate of ACM SIGGRAPH and a member of the
Eurographics Executive Committee. His current research area is investigating techniques to
compute high-fidelity graphics in real-time using a combination of parallel rendering and visual
perception.
Mashhuda Glencross received her B.Sc., M.Sc., and Ph.D. from The University of Manchester. She
has been working as a post-doctoral research associate in the Advanced Interfaces Group since
finishing her doctoral dissertation in 2000. Her research interests have been in the areas of
physically-based modelling and collaborative virtual environments. The group has developed
systems for building and distributing complex virtual reality applications and Mashhuda has worked
on large national and European research projects using these to build real-world CAD and
visualization applications. Her current research is in the area of collaboration in haptic
environments.
Miguel Otaduy received his Ph.D. in 2004 from the University of North Carolina, Chapel Hill,
supported by fellowships from the Government of the Basque Country and UNC Computer Science
Alumni. He received his B.S.from the University of Mondragon (Spain) and has worked both at la
Ikerlan and Immersion Medical. His research interests include haptic rendering, physically-based
simulation, collision detection, and geometric modelling. He and Prof. Ming C.Lin introduced the
novel concept of sensation preserving simplification for haptic rendering at SIGGRAPH 2003, and
proposed the first 6-DOF haptic texture rendering algorithm. Currently, he is a research associate at
ETH Zurich working with Prof. Markus Gross.
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