Re: Display RGB values / P4_09

• To: Detlef Gaisser <detlef.gaisser@xxxxxx>
• Subject: Re: Display RGB values / P4_09
• From: Bill Hibbard <billh@xxxxxxxxxxxxx>
• Date: Tue, 5 Aug 2003 04:53:51 -0500 (CDT)

Hi Detlef,

> I'm trying to Display RGB values in a Color Cube like in Example P4_09, with 
> the
> difference that i already have the RGB Values in a 3 dimensional array.
> (e.g [255,255,0] should map to yellow and should be displayed as 255,255,0).
>
> I looked at also at the other examples, but couldn't find a good way to 
> achieve
> this.
>
> Thanks for any hint.

P4_09.java constructs a FlatField with MathType:

  ((red, green, blue) -> RGB_VALUE)

and ScalarMaps:

  red -> XAxis
  green -> YAxis
  blue -> ZAxis
  red -> Red
  green -> Green
  blue -> Blue

What you probably want is a FlatField with MathType
something like:

  ((x, y, z) -> (red, green, blue))

and ScalarMaps:

  x -> XAxis
  y -> YAxis
  z -> ZAxis
  red -> Red
  green -> Green
  blue -> Blue

For each of your ScalarMaps to Red, Green and Blue, call
setRange(0.0, 255.0) - this will map 0.0 to 0.0 and 255.0
to 1.0 (in VisAD/Java3D colors, 1.0 is full on and the same
as what you mean by 255).

Good luck,
Bill

• References:
  • Display RGB values / P4_09
    • From: Detlef Gaisser