Re: ColorControls and images

  • To: Tennessee James Leeuwenburg <tjl@xxxxxxxxxx>
  • Subject: Re: ColorControls and images
  • From: Bill Hibbard <billh@xxxxxxxxxxxxx>
  • Date: Mon, 11 Oct 2004 06:23:27 -0500 (CDT)
Hi Tennessee,

> I've got a satellite pic to render which is an image. As such, the only
> visual scalarmap I can use is RGB. I want to display it in greyscale,
> but when I try to use initGreyWedge, nothing happens. I've got a code
> snippet below. When it executes I see the println of "Greyscale" but
> then there is no change.
>
> Would you expect this to work?

Yes, since visad/examples/SatDisplay.java uses the same
logic. Try running 'jaava SatDisplay' in the visad/examples
directory. It will read image and map files from the ftp
server at UW, so you may want to modify it to read local
files. Please let us know what you find.

Cheers,
Bill

> Code Snippet :
>
>          if(scalarMap != null) {
>              ColorControl cc = (ColorControl) scalarMap.getControl();
>
>              if(mode == ColorConfigurable.GREYSCALE) {
>                  System.out.println("Greyscale");
>                  cc.initGreyWedge();
>              }
>
>              if(mode == ColorConfigurable.RGB) {
>                  System.out.println("RGB");
>                  cc.initHSV();
>              }
>          }
>
>