Gel

Gel is built upon a system of Horizontal Products, and supports time-varying datasets. Pictured here is a shuttle dataset with an interactive positioning tool [dragger] in the foreground controlling the release point of a streamline [colored in red]. The UI is fully scripted. Built on the Field Encapsulation Library, the VisTechniques are written in a grid-independent manner, allowing all techniques to work on unstructured meshes as well as time-varying meshes. FEL now supports paged fields whereby only small subsets of the data are pulled from disk on demand. Thus we can interactively view very large time-varying data in real time.

This software runs on SGI, NT, and linux systems.

Some images...

Harrier data courtesy of Jasim Ahmad, Neal Chaderjian, Shishir Pandya, and Scott Murman.

Harrier 3/4 view [1065 KB]

Existing Vis Techniques include:

• Surfaces, Decimated surfaces [structured only]
• Contours
• Isosurfaces
• Cutting Planes
• Vector Fields (vectors at nodes, and randomly placed)
• FieldLines: StreamLines, StreakLines, PathLines, and TimeLines.
• Vortex Cores
• Flow separation lines
• Shock surfaces
• Point and Cell data Probes
• IBlanks

Other features:

• Keyframe animation.
• RGB output (can be combined with keyframe animation to make movies)
• 3D graphics metafile I/O[GelFile].
• ARCGraph, VRML, and DXF [surfaces only] output
• 3D Direct manipulation used for particle rake draggers, cutting planes...
• User malleable UI, widget and window positions saved between sessions.
• Colormap editing.
• Scripted [i.e. all GUI interactions are saved to a script file].

"Tapered Cylinder" dataset [D. Jespersen and C. Levit. 1991].

Remember to shift-click when mousing these links so you can transfer the data directly to your disk.

NT: Grid [1572876 bytes] and Soln [2621468 bytes]

SGI: Grid [1572876 bytes] and Soln [2621468 bytes]