[vtkusers] Display different ImageData Scalar to different Viewport

[David Gobbi]

Hi Ruben,

Instead of data.SetActiveScalars(), use mapper.SetArrayId(i) or
mapper.SetArrayName(name).

 - David


On Thu, May 31, 2018 at 8:57 AM, Ruben Di Battista <
rubendibattista at gmail.com> wrote:

> Hello,
> I'm playing a bit with VTK and its Python bindings. I wrote down a simple
> case where I generate the distance function of a sphere, I extract the
> surface from it using the FlyingEdge3D algorithm, then I calculate the
> curvatures using the vtkCurvatures filter, and then I'd like to show the
> Mean_Curvature and the Gauss_Curvature in two different viewports.
>
> What I tried to do is to use the `SetActiveScalars` method of the
> `PointData` associated to my `ImageData` dataset, but at the end I get two
> Viewports showing the same scalar (the last one activated). I also tried to
> stop the program execution using a debugger and triggering the render
> before the second scalar is made "active", and it correctly shows the first
> scalar field. So It's like that the two mappers rendered are "linked".
>
> Do I need to do a ShallowCopy somewhere?
>
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