snap2diverse: coordinating information visualizations and virtual environments
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Snap2Diverse: Coordinating Information Visualizations and
Virtual Environments
Nicholas F. Polys, Chris North,
Doug A. Bowman, Andrew Ray,
Maxim Moldenhauer, Chetan Dandekar
Department of Computer Science
Center for Human Computer Interaction
Virginia Polytechnic Institute and State University
SPIE Visualization and Data Analysis 2004
Problem: Integrated Information Spaces
Researchers, designers, students, and analysts need to explore, search, recognize, and compare patterns across a wide variety of data types and applications.
Some representations are better suited to different data types and questions:– Abstract information -> Information Visualization
– Perceptual or spatial information -> Virtual Environments
User Problem:
• Perceptual, environmental phenomena alone do not guarantee accurate mental models
• Interfaces for information and controls are consistently under-represented and poorly integrated in VEs
Developer Problem:
• Increasingly, objects rendered in VEs have metadata and annotations associated with them. These may change over time.
• Lacking design guidelines and information architectures for efficient management of Integrated Information Spaces
Approach: Information-Rich Virtual Environments (IRVEs)
IRVEs are at the union of VE and Info Vis:perceptual + abstract information is simultaneously accessible and linked
• Define the issues and the task space for this class of applications
• Define the design space to solve and support them• Apply usability engineering methods to identify
tradeoffs and enumerate design guidelines
Some Research Questions
Where, how, and when should the abstract information be displayed in the VE?
In what form should the information be displayed?
How can interrelationships between the spatial and abstract information be represented?
Bowman, Doug, North, Chris, Chen, J., Polys, N., Pyla, P., Yilmaz, U., (2003) “Information-Rich Virtual Environments: Theory, Tools, and Research Agenda”. Proc. Virtual Reality Software and Technology (VRST)
IRVEs and Multiple Coordinated Views
Users can index to and from perceptual and abstract information through ‘brushing and linking’. Snap2Diverse uses RMI and RemoteSharedMemory to link VE and InfoVis toolkits:
• DIVERSE is an multi-platform, open-source VR toolkit [diverse.sourceforge.net]
• Snap-Together Visualization is a free, componentized toolkit for information visualization [infovis.cs.vt.edu]
Snap2Diverse IRVE
• Multiple-Views approach:• Abstract info in separate Infovis apps• hanging picture, HUD• Brushing and linking
• Layout location: display-fixed location; separate, opaque application; does not reside within the scenegraph.
• Layout Association: Hanging Picture is visually implicit; not localized in the environment; brushing and linking.
Snap
Video
Event Support
Diverse as a Snap-able component:– Unique data record Ids for 2 way communication– Event communication (e.g. select, load)
Snap Coordination
Manager
É
Component 1
CAVE Adapter (RMI Messaging
Events)
DIVERSEAtomView application
Java Component
Adapter Component 2
Application: Cheminformatics
Usability Evaluation Summary
• Snap2Diverse as tested is:– high-threshold for learnability– high-ceiling for functionality
• Users were able to brush & link to solve tasks• In most cases, users chose suitable visualizations to
recover the information required for the finding and comparing tasks
• Given a choice, users tended to recover information from the VE rather than the InfoVis window
• Xwand is a moded interface and switching between 2D and 3D navigation and selection was not intuitive.
Lessons Learned
Simple events provide ‘glue’ to support complex functionality:
• Benefits of exposing VE scenegraphs to external events; enabling technology must be extended
• Benefits of composable and integrated information spaces
• Designers must consider tasks and the knowledge required for completion (ie Sutcliffe and Faraday, Shneiderman)
Current Work: PathSim
http://www.vbi.vt.edu/~pathsim
Paper to be presented at Web3D 2004
Polys, N., Bowman, D., North, C., Laubenbacher, R., Duca, K., (2004). “PathSim Visualizer: An Information-Rich Virtual Environment for Systems Biology” Proceedings of Web3D 2004, ACM SIGGRAPH.
Future Work
• IRVE Testbed construction• Controlled experiments and usability evaluations to
identify the significant design dimensions and techniques for integrated information spaces.
• Identify tradeoffs, guidelines, and design patterns for this class of problems.
• Propose future X3D standard components:– Annotation (labels, metadata)
– Compositing (HUD, ApplicationTexture)
Thanks and Happy Hacking!
Nicholas F. Polys
npolys@vt.edu
Department of Computer Science
Center for Human Computer Interaction
Virginia Polytechnic Institute and State University
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