Introducing the view model
Understanding constraints and policies
- A chain of relationships control this mapping between worlds
- Eye locations relative to the user's head
- Head location relative to a head tracker
- Head tracker relative to the tracker base
- Tracker base relative to an image plate (display)
- . . . and so on, with variations
- A constraint system defines these relationships
- For a given environment and usage, some relationships
are constants, while others vary
- Java 3D policies select among standard constraint systems
and control how they adapt to changes
