IRIS Explorer Example of Volume Visualization

There is an example of volume visualization in Chapter 1 of the IRIS Explorer's User's Guide. This example uses atmospheric data. The map uses the following modules:

ReadLat reads in the color map for the water buoyancy data.
ReadLat<3> reads in the water buoyancy data.
ReadLat<2> reads in the rain density data.
IsosurfaceLat generates an isosurface of the rain density.
WireFrame creates a frame that defines the boundaries of the storm data.
GenerateColorMap produces a colormap for the buoyancy data.
VolumeToGeom converts the volume data to geometry for Render - this module does the splatting - see below).
Render renders the rain density isosurface and the water buoyancy volume (the purple haze).

volmap.jpg (44228 bytes)

 

Example of a Combined Surface Fitting and Direct Volume Rendering image from Iris Explorer.

The cloud consists of splats, small planar shapes that simulate fuzzy blobs. Note that splats can take a long time to render. There is a quality-time tradeoff that can be adjusted in this module. The lower the error tolerance the higher the quality and the longer the rendering time.

volimg1.jpg (36176 bytes)

 


Return to Volume Visualization and Rendering
HyperVis Table of Contents

Last modified on February 16, 1999, G. Scott Owen, owen@siggraph.org