Modeling and Simulation in a Reconfigurable Distributed Virtual Environment

1
Collaborative Synthetic Environments
Air/Land/Sea Defense
Human Body Walkthrough
Molecular World
2
Modeling and Simulation in a Reconfigurble
Distributed Virtual Environment/Chandrajit
Bajaj/N00014-94-1-0370

• Project Approaches
• Hierarchical spatial-search data structures.
• Fast collision detection
• An object-oriented geometric toolkit.
• Enhancement of Distribution and Collaboration
  Substrate
• Prototypes of Synthetic Environments
• Scientific Approach to Resolving Questions
• Geometric Support
• Space Decomposition Search Structures
• Model Construction
• Collision Detection
• Visualization
• Interrogative
• Distributed and Collaborative Support
• Object Communication Layer, Network Layer
• Session Manger, Brokers, Constraint Management

3
Modeling and Simulation in a Reconfigurble
Distributed Virtual Environment/Chandrajit
Bajaj/N00014-94-1-0370

• Project Objectives
• Collaborative Development Infrastructure
• Synthetic Environments for exploring Design
  Strategies and Training
• Scientific Questions
• Rapid creation of synthetic environments from
  scans
• Efficient search data structures
• Efficient techniques for Visualization and
  Quantitative Querying
• Paradigms for object interoperability and task
  sharing in multi-user environments

4
Modeling and Simulation in a Reconfigurble
Distributed Virtual Environment/Chandrajit
Bajaj/N00014-94-1-0370

• Empirical Observations
• We have developed algorithms for the
  reconstruction of smooth surfaces from scattered
  points and cross sectional slices.
• Detection and representation of sharp features
  need to be further investigated.
• Fast Isocontouring, Mesh Reduction, Topology,
  Computation paradigms for Visualization
• Tradeoffs between triangle-based vs convex based
  spatial-search data structures depend on the
  number and complexity of objects in the
  environment
• Hierarchical Session Managers
• Constraint Management for View/View, View/Object
  and Object/Object relations.
• Proven Results
• Software Toolkits
• A-splines and A-patch reconstruction form
  scattered points
• Triangle-mesh surface reconstruction from
  cross-sectional data.
• Fast Isocontouring Error-bounded mesh decimation
• Scalar Topology Computation
• Molecular modeling and visualization
• Object-oriented geometric toolkit for
  spatial-search.
• Broker and Constraint Management modules in
  Collaboration Substrate