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DOI: 10.4230/DFU.Vol2.SciViz.2011.276

Interactive Isocontouring of High-Order Surfaces

Authors: Christian Pagot, Joachim Vollrath, Filip Sadlo, Daniel Weiskopf, Thomas Ertl, and João Luiz Dihl Comba

Published in: Dagstuhl Follow-Ups, Volume 2, Scientific Visualization: Interactions, Features, Metaphors (2011)

Abstract

Scientists and engineers are making increasingly use of hp-adaptive discretization methods to compute simulations. While techniques for isocontouring the high-order data generated by these methods have started to appear, they typically do not facilitate interactive data exploration. This work presents a novel interactive approach for approximate isocontouring of high-order data. The method is based on a two-phase hybrid rendering algorithm. In the first phase, coarsely seeded particles are guided by the gradient of the field for obtaining an initial sampling of the isosurface in object space. The second phase performs ray casting in the image space neighborhood of the initial samples. Since the neighborhood is small, the initial guesses tend to be close to the isosurface, leading to accelerated root finding and thus efficient rendering. The object space phase affects the density of the coarse samples on the isosurface, which can lead to holes in the final rendering and overdraw. Thus, we also propose a heuristic, based on dynamical systems theory, that adapts the neighborhood of the seeds in order to obtain a better coverage of the surface. Results for datasets from computational fluid dynamics are shown and performance measurements for our GPU implementation are given.

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Christian Pagot, Joachim Vollrath, Filip Sadlo, Daniel Weiskopf, Thomas Ertl, and João Luiz Dihl Comba. Interactive Isocontouring of High-Order Surfaces. In Scientific Visualization: Interactions, Features, Metaphors. Dagstuhl Follow-Ups, Volume 2, pp. 276-291, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2011)

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@InCollection{pagot_et_al:DFU.Vol2.SciViz.2011.276,
  author =	{Pagot, Christian and Vollrath, Joachim and Sadlo, Filip and Weiskopf, Daniel and Ertl, Thomas and Comba, Jo\~{a}o Luiz Dihl},
  title =	{{Interactive Isocontouring of High-Order Surfaces}},
  booktitle =	{Scientific Visualization: Interactions, Features, Metaphors},
  pages =	{276--291},
  series =	{Dagstuhl Follow-Ups},
  ISBN =	{978-3-939897-26-2},
  ISSN =	{1868-8977},
  year =	{2011},
  volume =	{2},
  editor =	{Hagen, Hans},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DFU.Vol2.SciViz.2011.276},
  URN =		{urn:nbn:de:0030-drops-33052},
  doi =		{10.4230/DFU.Vol2.SciViz.2011.276},
  annote =	{Keywords: High-order finite elements, isosurface visualization, GPU}
}

Document

DOI: 10.4230/DagSemRep.381

Scientific Visualization: Extracting Information and Knowledge from Scientific Data Sets (Dagstuhl Seminar 03231)

Authors: George-Pierre Bonneau, Thomas Ertl, and Gregory M. Nielson

Published in: Dagstuhl Seminar Reports. Dagstuhl Seminar Reports, Volume 1 (2021)

Abstract

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George-Pierre Bonneau, Thomas Ertl, and Gregory M. Nielson. Scientific Visualization: Extracting Information and Knowledge from Scientific Data Sets (Dagstuhl Seminar 03231). Dagstuhl Seminar Report 381, pp. 1-6, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2003)

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@TechReport{bonneau_et_al:DagSemRep.381,
  author =	{Bonneau, George-Pierre and Ertl, Thomas and Nielson, Gregory M.},
  title =	{{Scientific Visualization: Extracting Information and Knowledge from Scientific Data Sets (Dagstuhl Seminar 03231)}},
  pages =	{1--6},
  ISSN =	{1619-0203},
  year =	{2003},
  type = 	{Dagstuhl Seminar Report},
  number =	{381},
  institution =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemRep.381},
  URN =		{urn:nbn:de:0030-drops-152619},
  doi =		{10.4230/DagSemRep.381},
}

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Documents authored by Ertl, Thomas

Interactive Isocontouring of High-Order Surfaces

Abstract

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Scientific Visualization: Extracting Information and Knowledge from Scientific Data Sets (Dagstuhl Seminar 03231)

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