[vtkusers] vtkWarpVector/vtkGlyph3D array problem

[Robby Aungst]

Thanks. I need to do everything in terms of pipeline connections. Casting
back to polydata works for if you're doing everything as a stand-alone
dataset, but as far as I'm aware, you can't do that in terms of a pipeline.
My pipeline is:

vtkPolyData->vtkExtractSelectedIds->vtkWarpVector->vtkDistan
ceToCamera->vtkGlyph3D

I add the points and arrays to the polydata at the beginning. They just
aren't around anymore by the time I get to vtkGlyph3D and it seems like
vtkWarpVector is the culprit. Everything is connected with
SetInputConnection and it seems that polydata doesn't have an output port
so it has to be at the beginning and can't get created in the middle. I
can't use your workaround to get the arrays back in there. :/

On Wed, Jan 3, 2018 at 7:49 AM, Charles Kind <charles.kind at bristol.ac.uk>
wrote:

> As long as the arrays match the points you can move them between VTK data
> structures. I move arrays freely between polydata and structured grid in
> particular due to the nature of my research. I am not sure of your exact
> set
> up, maybe some pseudo code would help me understand.
> In my current VTK app I reconstruct with nearly every change/filter apart
> from subsampling which requires all arrays attached, some arrays I leave in
> their original data formats and only copy them over before creating actors
> and rendering. Again this may not be the 'correct' way of doing things and
> can be horribly memory intensive.
>
> Charlie
>
>
>
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