Re: your mail

• To: d-nguyen@xxxxxxxxxxxxxxxx
• Subject: Re: your mail
• From: "From: Bill Hibbard <hibbard@xxxxxxxxxxxxxxxxx>" <billh@xxxxxxxxxxxxx>
• Date: Sat, 22 Dec 2001 09:45:47 -0600 (CST)

Hi Dave,

Try replacing the two ScalarMaps to RGB amd to Alpha,
with one Sca;arMap to RGBA. See visad/examples/Test20.java
for an example. You can either use a LabeledColorWidget
to set the color table interactively, or you can get the
ColorAlphaControl and call its setTable(float[][] table)
method where table is [4][table_length].

Happy Holidays,
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


On Fri, 21 Dec 2001 d-nguyen@xxxxxxxxxxxxxxxx wrote:

> Hello, 
> 
> I am trying to add transparency to my program. It's currently set up like 
> this: 
> 
> (index)->(x, y, z, value) 
> 
> and I have Maps added as such 
> 
> display.addMap( new ScalarMap( x, Display.XAxis ) ); 
> display.addMap( new ScalarMap( y, Display.YAxis ) ); 
> display.addMap( new ScalarMap( z, Display.ZAxis ) ); 
> display.addMap( new ScalarMap( value, Display.RGB ) ); 
> display.addMap( new ScalarMap( value, Display.Alpha ) ); 
> 
> But it does not seem to be working. I am currently running Java3D OpenGl 
> version. 
> 
> The value data set ranges from 0 to about 3,000 with the majority of the 
> values 
> being near 1. I would like it so that the lower the value, the more 
> transparent 
> it is so that those near the higher end stands out and is not hidden by the 
> "cloud" of lower level particles. 
> 
> Any ideas? 
> 
> Thanks everyone, 
> -dave 
> 
> 

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    • From: 8.9.3/8.9.3