[Paraview] [EXTERNAL] Plotting data to an existing model's surface

[Mark Belan]

Hi David,

Thanks for your suggestion. I was able to successfully render my points in
a .csv file into specific points on the model (thanks Alan!), but I'm not
sure how to go about the next steps into turning the points into a mesh and
thus interpolating.

Where can I input these python commands in paraview? I'm afraid my skills
in programming are minimal.

Thanks for your help,

- Mark

On Fri, Jan 23, 2015 at 4:24 PM, David E DeMarle <dave.demarle at kitware.com>
wrote:

> After you
>
> 1) get the list of points and values in the csv file:
> x,y,z,val1,val2,…
> 2) read into paraview and converted from a table to a vtkpointset as Alan
> suggested
> 3) try the vtkSurfaceReconstruction filter to convert it into a mesh.
> That isn't exposed in ParaView (maybe not parallel aware) so use this
> python programmable filter to do use it:
>
> import vtk
>
> pdi = self.GetPolyDataInput()
>
>
> subf1 = vtk.vtkSurfaceReconstructionFilter()
>
> subf1.SetInputData(pdi)
>
> subf2 = vtk.vtkContourFilter()
>
> subf2.SetInputConnection(subf1.GetOutputPort())
>
> subf2.SetValue(0, 0.0)
>
> subf2.Update()
>
>
> pdo =  self.GetPolyDataOutput()
>
> pdo.ShallowCopy(subf2.GetOutput())
>
> ParaView will then happily interpolate values across the faces of the mesh
>
>
>
> David E DeMarle
> Kitware, Inc.
> R&D Engineer
> 21 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-881-4909
>
> On Fri, Jan 23, 2015 at 3:51 PM, Scott, W Alan <wascott at sandia.gov> wrote:
>
>>  Mark,
>>
>> I don’t know the answer to your question, but a few years ago I wrote a
>> wiki page on converting .csv file data into points and structured grids.
>> The write-up is here:  http://www.paraview.org/Wiki/Data_formats.  Hope
>> that helps.
>>
>>
>>
>> Alan
>>
>>
>>
>> *From:* ParaView [mailto:paraview-bounces at paraview.org] *On Behalf Of *Mark
>> Belan
>> *Sent:* Thursday, January 22, 2015 9:50 AM
>> *To:* paraview at paraview.org
>> *Subject:* [EXTERNAL] [Paraview] Plotting data to an existing model's
>> surface
>>
>>
>>
>> Hello all,
>>
>> I'm a graduate student in geology trying to do some visual data work, but
>> I'm afraid my inexperience with paraview is making things a bit difficult
>> for me.
>>
>> Essentially what I'm trying to create is a 3D model of a rock that has
>> its surface coloured to show spatial distribution of a physical property
>> associated with certain areas on the rock.
>>
>> I was able to reproduce the rock I sample from using a 3D scanner but I
>> have no idea how to go about selecting particular areas of the rock's
>> surface, assigning a value to that "area", and having the program
>> interpolate between multiple "areas". Essentially I'd like this to produce
>> a color gradient showcasing the changing values.
>>
>> Can anyone offer some guidance/direction? I had someone at my campus
>> suggest creating a .csv file with x,y,z coordinates of the particular areas
>> of the model of interest, but after doing that all I've produced are
>> "points"...not sure how to specify the association to the model and color
>> and interpolation, etc.
>>
>> Thanks for any help,
>>
>> - Mark
>> --
>>
>> *Mark Belan*, B. Art Sc.
>> *M. Sc. Candidate - Astrobiology*
>>
>> *Lewis and Ruth Sherman Graduate Fellow*
>>
>> McMaster University
>>
>> School of Geography and Earth Sciences
>>
>> GSB 323
>> 1280 Main Street West
>> Hamilton, Ontario
>> Canada
>> L8S 4L8
>>
>> *Art*: www.markbelan.com
>>
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>


-- 
*Mark Belan*, B. Art Sc.
*M. Sc. Candidate - Astrobiology*
*Lewis and Ruth Sherman Graduate Fellow*
McMaster University
School of Geography and Earth Sciences
GSB 323
1280 Main Street West
Hamilton, Ontario
Canada
L8S 4L8

*Art*: www.markbelan.com
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