The Cone of Vision: A New Technique for Interactive Volumetric Display

✍ Scribed by Dominique Astruc; Jean-Régis Angilella; Alain Vincent

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 984 KB
• Volume: 58
• Category: Article
• ISSN: 1077-3169
• DOI: 10.1006/gmip.1996.0031

✦ Synopsis

for an interactive postprocessing since a comprehensive A new technique is proposed for interactive exploration of understanding of the physics requires both the ability to very large (out-of-core) 3-dimensional time-varying data sets. adjust the visualization parameters interactively and the The idea is to process only the part of the data which is actually capability to animate a set of successive fields for timeseen by the observer's eye, i.e., the cone of vision (COV). This evolving phenomena. These questions of modern visualizatechnique involves a ''real-time'' data clipping algorithm to tion techniques have been investigated recently [3][4][5][6][7].

compute the data lying inside the COV with a negligible over-Several interactive softwares are available for 3D data head. Using the COV approach, the time required to render a visualization but they proved to be poorly efficient for scene becomes independent of the size of the data set. As only very large and/or time-evolving data sets, mostly because the data lying inside the COV are to be in the main memory whatever the observer's position is, the whole data set is of the computer, we introduce a new data structure and a new memory management technique so that arbitrarily large-sized processed and stored in the memory of the computer. The time-evolving data sets may be explored. Actual measures (scamain advantage of such an implementation is the rapid lar data set from direct numerical simulation of turbulence access to the data. But several limitations exist; e.g., the at resolution 256 3 ) of the global efficiency are given.