[vtkusers] InfoVis: Setting vertex color LUT range?

[Jeff Baumes]

Looks like a feature request for vtkViewTheme. We should have made it
store a general color map, rather than restricting it to HSV ranges.
It should be a fairly simple fix. The theme would need to store a
lookup table, and the ApplyViewTheme() function in each view would
need to use this directly. The old range methods on vtkViewTheme would
modify its lookup table.

Jeff

On Fri, Jan 9, 2009 at 9:47 PM, Eric E. Monson <emonson at cs.duke.edu> wrote:
> Hey folks,
>
> To color vertices according to an array that contains both positive and
> negative values, I need to build a diverging color map (lookup table) and
> force the scalar range that's mapped over these colors to be centered on
> zero:
>
> 1.  If I'm using a vtkGraphLayoutView, is there any way to force the lookup
> table to cover a certain range of values (rather than the real range of the
> vertex scalar array)?
>
> 2.  Is there a way with a theme to set a lookup table that's been built
> separately (rather than using ranges for hue, saturation, etc.) for extra
> control over the color map?
>
> It would be very cool if within a theme, or someplace handy like that, you
> could set the scalar range and the "Color Space" like when you use the Color
> Scale Editor in ParaView...
>
> Thanks,
> -Eric
>
> ------------------------------------------------------
> Eric E Monson
> Duke Visualization Technology Group
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-- 
Jeff Baumes, Ph.D.
R&D Engineer, Kitware Inc.
(518) 371-3971 x132
jeff.baumes at kitware.com