[vtkusers] interpolation

[Marie-Gabrielle Vallet]

Oliver,

it depends what you mean by the best way...
Piecewise linear interpolation is continuous, and not expensive once you
know which cell the point belongs to.

The attribute of a point (x,y,z) included in a grid cell is the weighted
average of cell node attributes. The weight associated to a node i is the
relative volume of the virtual cell obtained after changing i for the point
location.

Marie-Gabrielle Vallet

> Date: Thu, 24 Apr 2008 13:45:44 +0200
> From: "Oliver Gloth" <oliver.gloth at engits.com>
> Subject: [vtkusers] interpolation
> To: "'vtkusers'" <vtkusers at vtk.org>
> Message-ID: <005901c8a600$bada5220$0b01a8c0 at cod>
> Content-Type: text/plain;       charset="us-ascii"
>
> Hello,
>
> What would be the best way to interpolate attributes of a
> vtkUnstructuredGrid? I have a given point (x,y,z) which is not a node of
the
> grid and I want to interpolate the values of point attributes for this
> position.
>
> It is not a visualisation task -- I am rather "abusing" the VTK data
> structures for unstructured mesh generation.
>
> Thanks,
> Oliver
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