[vtkusers] Merge polydatas of different sizes

[David Gobbi]

Hi Joey,

The vtkProbeFilter can apply the scalars of one dataset to a
second dataset.  It uses interpolation so it does not require a
point-to-point match.  I suggest that you look at the code in
vtkProbeFilter.cxx to see if it does what you need.

  David

On Thu, Oct 28, 2010 at 10:09 AM, Joey Mukherjee <joeymu at gmail.com> wrote:
> I have two datasets which I am using/rendering as polydata.  I can
> overlay these datasets and see that the results line up like I expect
> geometrically.
>
> However, I would like to color one dataset by the scalars of the
> other.  The problem is the datasets are different size and in fact,
> the one I would like to use a "color" is just a subset of the first
> dataset.  Ideally, I'd like to color just the parts present in the
> second dataset and leave the remaining scalars from the first dataset
> in place.
>
> Or maybe the reverse?  Get the subset of the geometry from the first
> dataset and then apply these colors, and then continue to overlay
> them?
>
> My first dataset has been warped with vtkWarpScalar and its geometry
> is perfect.  I just want to change the colors on a small region of the
> entire image.
>
> Does anyone have any hints on what filters I can use to achieve this?
>
> Thanks,
> Joey
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