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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
Hi Doug, Unfortunately, transparent volume rendering is not yet implemented in VisAD (if it was, you'd want to replace the two maps of cloud_type to RGB abd Alpha, with one map to RGBA). Probably the best you can do currently is to organize your data with the MathType: (sm_alt -> ((sm_lat, sm_lon) -> cloud_type)) and then map sm_alt -> ZAxis sm_lat -> XAxis sm_lon -> YAxis cloud_type -> RGBA which should render as many transparent horizontal layers. This will look pretty good from the top, less good from the side. On the other hand, except for thunderstroms, most clouds are organized in thin horizontal layers ;) This way of rendering transparent volumes is pretty much what Vis5D does, except that it swicthes the orientation of the layers as the user rotates the box. This approach is harder in VisAD, since domain Sets don't have to be Linear or even Gridded. By the way, note the visad.util.LabeledRGBAWidget for user control over the mapping to RGBA. Cheers, Bill ---------------------------------------------------------- Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI 53706 whibbard@xxxxxxxxxxxxx 608-263-4427 fax: 608-263-6738 http://www.ssec.wisc.edu/~billh/vis.html
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