TitleHigh-Quality Volume Rendering of Adaptive Mesh Refinement Data (In Proceedings)
inVision, Modeling, and Visualization 2001
Author(s) Gunther H. Weber, Oliver Kreylos, Terry J. Ligocki, John M. Shalf, Hans Hagen, Bernd Hamann, Ken Joy, Kwan-Liu Ma
Year November 2001
LocationStuttgart, Germany
DateNovember 21--23, 2001
PublisherAkademische Verlagsgesellschaft Aka GmbH and IOS Press BV
AddressBerlin, Germany and Amsterdam, Netherlands
Pages121--128, 522
Abstract Adaptive mesh refinement (AMR) is a numerical simulation technique used in computational fluid dynamics (CFD). By using a set of nested grids of different resolutions, AMR combines the simplicity of structu red rectilinear grids with the ability to adapt to local changes in complexity in th e domain. Without proper interpolation on the boundaries of grids of different lev els of a hierarchy, discontinuities can arise. Treating locations of data values giv en at cell centers of AMR grids as vertices of a dual grid creates gaps between hierarchy levels. Using an index-based tessellation approach that fills these gaps with ``stitch cells'' we define an interpolation scheme that avoids discontinuities at level boundaries. We use the resulting interpolation scheme to generate volume-rendered images. Modifying transfer functions on a per-level basis allows us to emphasize (or de-emphasize) a specific level and gain a better understanding of the underlying hierarchical structure.