[Paraview] Calculating the distance between two surfaces as a function of time during large deformation process

[Cory Quammen]

Hi Alan,

There is a filter in VTK called vtkDistancePolyDataFilter. It takes
two polydata as inputs and produces up two two outputs, each with an
the (optionally) signed distance from each point in the first polydata
to the closest point on the second polydata. If the polydata inputs
overlap and the signed distance is requested, the distance may be
negative, which means that the point at which the distance is computed
is inside the other polydata.

Attached is a ParaView 4.2 state file with a Programmable Filter that
exposes the vtkDistancePolyDataFilter. It could also be exposed as an
XML plugin.

Cheers,
Cory

On Tue, Dec 23, 2014 at 6:20 PM, Biddiscombe, John A. <biddisco at cscs.ch> wrote:
> The way I did this was to use one surface as a “source” - fire rays from
> this surface along the surface normal until they hit the “target” and
> return the distance. Then use the distances for every source node as a new
> field which is output. One requires ideally a source mesh with quite dense
> points to get a good sampling.
>
> JB
>
> On 23/12/14 21:02, "Scott, W Alan" <wascott at sandia.gov> wrote:
>
>>I have a user that asked the following question.  Any ideas how to do
>>this?
>>
>>Thanks,
>>
>>Alan
>>
>>
>>Greetings,
>>
>>I need to quantify the distance between two curved and deforming surfaces
>>(large deformation mechanical analysis) as a function of time in batch
>>mode. I don't know (and don't want to know) which two node points are the
>>closest. Could you outline how you would code up something like this ?
>>
>>George
>>
>>
>>
>>
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-- 
Cory Quammen
R&D Engineer
Kitware, Inc.
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