[vtkusers] creating colortables (and opacity) with 3 scalars, rather than 1

[Alex Malyushytskyy]

VTK has 2 ways to color datasets.
You can directly specify color  or you can make the mapper to use look up
table to color according to point or cell scalar array.

http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/ColorCells

Does this answer your question?


On Sat, Jul 20, 2013 at 2:44 AM, Ruff <albin.nilsson at gmail.com> wrote:

> I would like some way to rewrite the current color- and opacity settings.
> I have a structuredPoints-set and I am currently using one scalar value and
> the following settings for volume rendering:
>
> opacity = vtk.vtkPiecewiseFunction()
> opacity.AddPoint('scalar', 'opacity') #repeated a bunch of times
> colors = vtk.vtkColorTransferFunction()
> colors.AddRGBPoint('scalar','red','green','blue') #repeated a bunch of
> times
>
> (the opacity and colors goes into ->vtkVolumeProperty->vtkVolume)
> Is there some easy way to rewrite this so I can color structuredPoints with
> 3 scalars in it?
>
>
>
> --
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> Sent from the VTK - Users mailing list archive at Nabble.com.
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