[vtkusers] Create Blue-White-Red color map lookup table

[Eric E. Monson]

Hey Hong,

I've never found an easier way. I end up building a color transfer function since that can be set to "diverging" color mode, and then I copy the color values into a lookup table if I can't use the color transfer function directly.

Hopefully someone else has a more clever idea,
-Eric

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Eric E Monson
Duke Visualization Technology Group


On Sep 27, 2011, at 12:49 PM, Hong Yi wrote:

> Hello,
>  
> I am wondering whether there is a simple way to create a blue-white-red color map vtkLookupTable other than defining scalar to color mapping through color transfer function. If I set the hue range from 0.667 to 0, a rainbow blue to red colormap will be generated. What I want is not a rainbow colormap, but a blue-white-red color map which varies colors from blue through white to red. Any advice is very much appreciated.
>  
> Thanks,
>  
> Hong
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