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• To: billh@xxxxxxxxxxxxx
• Subject: Re: your mail
• From: d-nguyen@xxxxxxxxxxxxxxxx by webemail.it.northwestern.edu (8.9.3/8.9.3) id LAA03591; Sat, 22 Dec 2001 11:37:41 -0600 (CST)
• Date: Sat, 22 Dec 2001 11:37:41 -0600 (CST)

Bill, Matthias, 

Thanks for both of your suggestions. I have tried those and it seems like I 
cannot affect the transparency of these particles. 

I have tried creating a table with the ColorAlphaControl. I have also tried 
using constantMaps. I have tried using the LabeledColorWidget but I do not see 
a line for transparency. Nor did I see one when I ran Test20 as suggested. 

I'm pretty sure it is not a problem with my system configuration since example 
P4_06 from Ugo's tutorial seems to work fine. 

I have attached some files below if anyone could possible look at these. I 
would appreciate any feedback. 

particle_temperature_32.dat is a data file. 
readdata.java prints out point coordinate and values from data files. Run it by 
calling java readdata 32 particle_temperature_32.dat. 
partplot.java is the program I am trying to get working. Run it by calling java 
partplot 32 particle_temperature_32.dat 

Thanks for any help, 
-dave 

> 
> 
> 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 
> > 
> > 
> 
> 

Attachment: readdata.java
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Attachment: partplot.java
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Attachment: particle_temperature_32.dat
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