Hi Dirk,
> I just started using VisAd and have gone through the 2D examples by
> Ugo Taddei. Well as much as I could considering... The issue is
> that any time I am using more than one ScalarMap for a data set I get
> a bus error (read potential memory leak). Now I can create more than
> one Map for a dataset but cannot .addMap() it <shrug>. For example
> in the contour example:
>
> tempIsoMap = new ScalarMap( data, Display.IsoContour );
> tempRGBMap = new ScalarMap( data, Display.RGB );
>
> this works fine for:
>
> display.addMap( latMap );
> display.addMap( lonMap );
>
> display.addMap( tempRGBMap );
>
> so I get a shaded map of my data that is good but I'd like contours
> instead. If I use:
>
> display.addMap( latMap );
> display.addMap( lonMap );
>
> display.addMap( tempIsoMap );
> display.addMap( tempRGBMap );
>
> <plus all the iso-contour bits as well>
>
> I get a "Bus error" which usually means a memory fault. I even tried
> recompiling the classes but the same error occurs.
>
> Does anyone have any suggestions, I am using MacOS X 10.0.4 and
> Java 3.1 DP2 by the way.
>
> My main desire to use multiple maps with shading is so that I can
> use the .setRange() for topo data, blue hues for elevation below sea
> level and green hues above. I could use an index map (a la GMT)
> instead I guess, but I have not learned enough of the VisAd to work
> that out yet.
Bus errors have to be bugs in the Mac OS X implementation
of Java. The worst you should be able to get from a bug in
Java code is an Exception or Error.
If you have access to a Solaris, Linux or (shudder) Windows
machine, try that. In the meantime, you might want to let
Apple know about the bug you found in their Java
implementation.
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
