Re: Color table from TextAdapter

• To: Bill Hibbard <billh@xxxxxxxxxxxxx>
• Subject: Re: Color table from TextAdapter
• From: Ugo Taddei <p6taug@xxxxxxxxxxx>
• Date: Thu, 24 Apr 2003 13:48:25 +0200

Hi Bill,

Bill Hibbard wrote:

Hi Ugo,
...

. . .

I'm attaching a test program and a color table. The program creates some
 2D data, displays with rgb and then pops up a file chooser for the
user to load a color table. As said, the table comes free with this
email and looks like this:
...

Note: colors must be between 0.0 and 1.0 (as specified in the
documentation).

Huh! I hadn't read the documentation correctly...
It says *domain* and range must be between 0.0 and 1.0

Can anyone tell me what's wrong or what I'm doing wrong?

The problem is that a Function passed to
ColorControl.setFunction() must have a domain
Set with extents in (0.0, 1.0). The call to
visad.jmet.DumpType.dumpDataType() gives the
domain Set as:

  Linear1DSet (index) Range = 0.0 to 7.0 step 1.0

Which must be what the TextAdapter creates. It
would need to be:

  Linear1DSet (index) Range = 0.0 to 1.0 step 0.14285

Now I see...

(index->(r,g,b))
r g b index(0.0:1.0)
1 1 1
1 0 0
0 1 0
0 0 1
0 0 1
1 0 1
1 1 0
0 0 0

Cheers,
Bill

Works great now!

Thanks,

Ugo

• Follow-Ups:
  • Re: Color table from TextAdapter (errata)
    • From: Ugo Taddei

• References:
  • Re: Color table from TextAdapter
    • From: Bill Hibbard