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Adaptive extraction of time-varying isosurfaces

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4 Author(s)
Gregorski, B. ; Center for Appl. Sci. Comput., Lawrence Livermore Nat. Lab., CA, USA ; Senecal, J. ; Duchaineau, M.A. ; Joy, K.I.

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 overtime 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.

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Visualization and Computer Graphics, IEEE Transactions on  (Volume:10 ,  Issue: 6 )