[Paraview] Scalars in Polydata

[Amy Squillacote]

Hi Bikash,

Try using the Pick filter in ParaView. It allows you to pick either 
cells or points with either a 3D coordinate ("World Point") or an id. 
You should use the Cell pick type. On the Parameters tab, it will list 
the cell and the points used by this cell as well as any point-centered 
or cell-centered data attributes.

If you are picking with a 3D coordinate, you can interactively select 
the point by either moving the point widget in the 3D scene or by 
placing the mouse cursor over a particular location and pressing the 'P' 
key.

- Amy

Bikash Agarwal wrote:
> Hi All,
>
> My question relates to legacy VTK file formats. For a polydata .vtk 
> file with points and lines how can identify which points are being 
> used by a particular line in paraview.
>
> I would like to identify the points used by each line and then use 
> them for calculations in a custom filter. I have given an example 
> below to demonstrate what I mean.
>
> #vtk DataFile Version 2.0
> My data
> ASCII
> DATASET POLYDATA
> POINTS 6 float
> 0.0 0.0 0.0
> 1.0 1.0 1.0
> 2.0 2.0 2.0
> 3.0 3.0 3.0
> 4.0 4.0 4.0
> 5.0 5.0 5.0
> LINES 3 9
> 2 0 1
> 2 2 3
> 2 4 5
>
> In this case after this has been read into paraview, I want to be able 
> pass this data to my filter and identify which points are being used 
> by which lines. I was thinking of assigning scalars to each line which 
> might be a unique id, but am not sure how to implement that or if that 
> is a correct approach.
>
> Thanks,
> Bikash
> ------------------------------------------------------------------------
>
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-- 
Amy Squillacote
Kitware, Inc.
28 Corporate Drive
Clifton Park, NY 12065
Phone: (518) 371-3971 x106