[Paraview] CSV Data using extra fields.

[Andy Bauer]

Something like the code below should work for the programmable filter.  Note
that this assumes the input and output are polydata.

  pdi = self.GetPolyDataInput()

pdo = self.GetPolyDataOutput()

pdo.SetPoints(pdi.GetPoints())

np = pdo.GetNumberOfPoints()

a = vtk.vtkUnsignedCharArray()

a.SetNumberOfComponents(3)

a.SetNumberOfTuples(np)

a.SetName("color")

r = pdi.GetPointData().GetArray("r")

g = pdi.GetPointData().GetArray("g")

b = pdi.GetPointData().GetArray("b")

for i in range(np):

a.SetValue(i*3, r.GetValue(i))

a.SetValue(i*3+1, g.GetValue(i))

a.SetValue(i*3+2, b.GetValue(i))


pdo.GetPointData().AddArray(a)



On Fri, Jul 30, 2010 at 2:13 AM, Andrew Maclean
<andrew.amaclean at gmail.com>wrote:

> I have a file that looks like this:
> x y z r g b px py
>
> -2.064749 -1.623789 5.264024 254 254 254 5.000000 7.000000
>
> -2.267242 -1.790226 5.803583 254 254 254 5.000000 8.000000
>
> -2.251401 -1.784915 5.786366 254 254 254 5.000000 9.000000
>
> -1.401535 -1.134097 3.676532 201 201 201 5.000000 14.000000
>
> -1.420374 -1.154109 3.741410 179 179 179 5.000000 15.000000
>
> ...
>
> In ParaVew, I use the inbuilt CSV reader and get a table of labelled
> columns.
> In order tot get the points, I use a TableToPoints filter.
> The output of this filter is a table consisting of r,g,b, px, py,
> points, point ID.
> This plots OK in 3D.
>
> How can I transform the r, g, b arrays into a vtkUnsignedCharArray in
> order to add colour information to the points?
> I have been trying to use a programmable filter but don't seem to be
> able to access the r, g, b components.
> Also will the other components of the array be passed through, namely
> (points, and px, py)? Ultimately I want to create a 2d image of the
> px, py and colours.
>
>
>
> Any help appreciated.
>
> Thanks
>   Andrew
>
> --
> ___________________________________________
> Andrew J. P. Maclean
> Centre for Autonomous Systems
> The Rose Street Building J04
> The University of Sydney  2006  NSW
> AUSTRALIA
> Ph: +61 2 9351 3283
> Fax: +61 2 9351 7474
> URL: http://www.acfr.usyd.edu.au/
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