Hi Cicero,
> I´m using VisAD to visualize radar and lightling data. Now I've inserted
> also a GIF image on the background by visad.data.gif.GIFForm. The image
> is apearing behind all the other data, as it shoud.
>
> The problem is that I could not make the undefined radar data invisible
> (alpha =0). I´m using a Integer2DSet and setting the points outside the
> radar range to Float.NaN but these points apear on the display´s
> background color.
>
> I also tried to map to RGBA instead of RGB but didn´t worked either.
Transparency works in a number of our examples, so I don't
know enough to know what your problem is.
Unless you are using DisplayImplJ2D, which does not support
transparency.
Good luck,
Bill
----------------------------------------------------------
Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI 53706
hibbard@xxxxxxxxxxxxxxxxx 608-263-4427 fax: 608-263-6738
http://www.ssec.wisc.edu/~billh/vis.html
