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Coherency-Based Curve Compression for High-Order Finite Element Model Visualization
Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-2849-6146
Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
University of Auckland, New Zealand .
University of Auckland, New Zealand .
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2012 (English)In: IEEE Transactions on Visualization and Computer Graphics, ISSN 1077-2626, E-ISSN 1941-0506, Vol. 18, no 12, 2315-2324 p.Article in journal (Refereed) Published
Abstract [en]

Finite element (FE) models are frequently used in engineering and life sciences within time-consuming simulations. In contrast with the regular grid structure facilitated by volumetric data sets, as used in medicine or geosciences, FE models are defined over a non-uniform grid. Elements can have curved faces and their interior can be defined through high-order basis functions, which pose additional challenges when visualizing these models. During ray-casting, the uniformly distributed sample points along each viewing ray must be transformed into the material space defined within each element. The computational complexity of this transformation makes a straightforward approach inadequate for interactive data exploration. In this paper, we introduce a novel coherency-based method which supports the interactive exploration of FE models by decoupling the expensive world-to-material space transformation from the rendering stage, thereby allowing it to be performed within a precomputation stage. Therefore, our approach computes view-independent proxy rays in material space, which are clustered to facilitate data reduction. During rendering, these proxy rays are accessed, and it becomes possible to visually analyze high-order FE models at interactive frame rates, even when they are time-varying or consist of multiple modalities. Within this paper, we provide the necessary background about the FE data, describe our decoupling method, and introduce our interactive rendering algorithm. Furthermore, we provide visual results and analyze the error introduced by the presented approach.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE) , 2012. Vol. 18, no 12, 2315-2324 p.
Keyword [en]
Finite element visualization, GPU-base dray-casting
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-86633DOI: 10.1109/TVCG.2012.206ISI: 000310143100035OAI: oai:DiVA.org:liu-86633DiVA: diva2:580110
Note

Funding Agencies|Swedish Research Council (VR)|2011-4113|Excellence Center at Linkoping and Lund in Information Technology (ELLIIT)||Swedish e-Science Research Centre (SeRC)||

Available from: 2012-12-20 Created: 2012-12-20 Last updated: 2017-12-06

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Bock, AlexanderSundén, ErikRopinski, Timo

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