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Hypervolumetric Plasma-data Visualization

Florence Zara 1 Matthieu Haefele 2, 3 Christophe Mion 4 Jean-Michel Dischler 2, 3
1 SAARA - Simulation, Analyse et Animation pour la Réalité Augmentée
LIRIS - Laboratoire d'InfoRmatique en Image et Systèmes d'information
2 CALVI - Scientific computation and visualization
IRMA - Institut de Recherche Mathématique Avancée, LSIIT - Laboratoire des Sciences de l'Image, de l'Informatique et de la Télédétection, Inria Nancy - Grand Est, IECL - Institut Élie Cartan de Lorraine
4 ISA - Models, algorithms and geometry for computer graphics and vision
INRIA Lorraine, LORIA - Laboratoire Lorrain de Recherche en Informatique et ses Applications
Abstract : Several techniques have been proposed to explore hypervolumetric datasets but most of them fail to be efficient when very large fields are to be processed. This report describes an interactive visualization technique designed to explore at real-time framerates very large hypervolumetric 4-D+t scalarfields (with up to 16GB raw data per time step). We introduce a new out-of-core scheme aiming at generalizing to hypervolumes, brick-based techniques, already standartly used for large volumetric (e. g. 3D) datasets. For a given time step, we visualize the entire 4-D space by displaying directly 2-D arrays of height fields, each height field representing a 2-D hyperslice of the 4-D space. The contribution of this work consists in introducing an efficient partitionning scheme, that we called hyper-bricks, in such a way that it overcomes all hardware bottlenecks, namely the progressive load from disk, the decompression time (CPU) and the display time (GPU). We show that our technique, further using a cache system and a level of detail representation allows users to explore the full hypervolume at real-time framerates even on low-end PCs with basic graphics cards. We mainly apply our technique to the interactive exploration of plasma behaviors resulting from large numerical semi-Lagrangian simulations.
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Submitted on : Wednesday, September 6, 2006 - 10:52:08 AM
Last modification on : Saturday, October 16, 2021 - 11:18:02 AM
Long-term archiving on: : Friday, November 25, 2016 - 11:37:35 AM


  • HAL Id : inria-00090630, version 2


Florence Zara, Matthieu Haefele, Christophe Mion, Jean-Michel Dischler. Hypervolumetric Plasma-data Visualization. [Research Report] RR-5971, INRIA. 2006, pp.16. ⟨inria-00090630v2⟩



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