1 / 7

OpenGL Visualization of Hurricane Isabel

Visualize Hurricane Isabel dataset with clouds, precipitation, and wind characteristics in real-time 3D using C++/OpenGL application with interactivity and multiple options. Challenges include data size and sorting for memory efficiency.

dansharp
Download Presentation

OpenGL Visualization of Hurricane Isabel

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. OpenGL Visualization of Hurricane Isabel Gregory P. Johnson, Christopher A. Burns Texas Advanced Computing Center The University of Texas at Austin

  2. Goals • Multiple Characteristics • Interactivity • Exploration Visualize the Hurricane Isabel dataset with the following three criteria:

  3. Our Solution • Standalone C++/OpenGL application • Standard language, APIs ==> Portability • Pthreads for multithreading • FLTK Toolkit for GUI widgets • Make use of modern GPU hardware Our solution runs on a standard desktop PC in real time

  4. Multiple Characteristics • Clouds • Billboarded quads • Opacity, luminance are functions of data • Precipitation • Color-coded spheres for snow, rain, and grauppel • Easily distinguished from clouds • Wind • Horizontal slicing plane • Colored either by wind direction, or wind magnitude Enable or disable any combination of the three visualizations

  5. Interactivity Challenges • Limited I/O Bandwidth • Very large files • Load data in a separate thread • Prefetch the next timestep • Sorting of cloud particle quads • Correct alpha blending requires sorting, sublinear performance • Organize voxel data in memory as 3D tiles • Sort quads in each tile, then sort the tiles • Good memory performance

  6. Exploration • Camera can move anywhere at any time • Transfer functions user-adjustable • Can pause simulation at any time, or advance to any timestep • Slicing plane altitude is user-adjustable

  7. Gallery Warmer wind vector colors indicate wind magnitude. Notice the sharp falloff of wind magnitude in the eye, heavy precipitation to the north. Wind vector colors are mapped to the compass directions above

More Related