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- PfPortals:
the authors describe an approach for determining potentially
visible sets in dynamic architectural models. Their scheme divides the models
into cells and portals, computing a conservative estimate of which cells
are visible at render time. The technique is simple to implement and can be
easily integrated into existing systems, providing increased interactive
performance on large architectural models.
- A nice introduction to Portal Engines.
- VisPak :
a package of visibility related algorithms written at the
University of Lethbridge, in C++ and using LEDA (Library of Efficient Data
types and Algorithms).
- VRML2's VisibilitySensor :
The VisibilitySensor detects visibility changes of a
rectangular box as the user navigates the world. VisibilitySensor is
typically used to detect when the user can see a specific object or
region in the scene, and to activate or deactivate some behavior or
animation in order to attract the user or improve performance.
- An X-Windows
Visibility Graph Exploring Tool by
Heather Alef.
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Labs
