Point-based stream surfaces and path surfaces

Authors:
Tobias Schafhitzel;Eduardo Tejada;Daniel Weiskopf;Thomas Ertl
Affiliations:
Universität Stuttgart;Universität Stuttgart;Simon Fraser University;Universität Stuttgart
Venue:
GI '07 Proceedings of Graphics Interface 2007
Year:
2007

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Abstract

We introduce a point-based algorithm for computing and rendering stream surfaces and path surfaces of a 3D flow. The points are generated by particle tracing, and an even distribution of those particles on the surfaces is achieved by selective particle removal and creation. Texture-based surface flow visualization is added to show inner flow structure on those surfaces. We demonstrate that our visualization method is designed for steady and unsteady flow alike: both the path surface component and the texture-based flow representation are capable of processing time-dependent data. Finally, we show that our algorithms lend themselves to an efficient GPU implementation that allows the user to interactively visualize and explore stream surfaces and path surfaces, even when seed curves are modified and even for time-dependent vector fields.