title: Adaptive extraction of time-varying isosurfaces.
abstract: We present an algorithm for adaptively extracting and rendering isosurfaces from compressed time-varying volume data sets. Tetrahedral meshes defined by longest edge bisection are used to create a multiresolution representation of the volume in the spatial domain that is adapted over time to approximate the time-varying volume. The reextraction of the isosurface at each time step is accelerated with the vertex programming capabilities of modern graphics hardware. A data layout scheme which follows the access pattern indicated by mesh refinement is used to access the volume in a spatially and temporally coherent manner. This data layout scheme allows our algorithm to be used for out-of-core visualization.
authors.affiliation: Center for Applied Scientific Computing, Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, CA 94551, USA. gregorski1@llnl.gov
authors.forename: Benjamin
authors.initials: B
authors.lastname: Gregorski
authors.forename: Joshua
authors.initials: J
authors.lastname: Senecal
authors.forename: Mark A
authors.initials: MA
authors.lastname: Duchaineau
authors.forename: Kenneth I
authors.initials: KI
authors.lastname: Joy