[vtkusers] Scalar interpolation

[Brian Curtis]

Jothy,

Thanks for your reply.

I am interested in printing the interpolated scalar values to the screen 
(Terminal window), how would I go about this?

~Brian



On 05/09/2012 09:41 AM, Jothybasu Selvaraj wrote:
> This should help you
>
> vtkSmartPointer<vtkProbeFilter>pf=
> vtkSmartPointer<vtkProbeFilter>::New();
> pf->SetInput(cube);//cube as vtkImageData
> pf->SetSource(line);line as vtkPolyData
> pf->Update();
>
> //Returns the result as a vtkTable
> vtkSmartPointer<vtkDataObjectToTable>polyDataToTable=
> vtkSmartPointer<vtkDataObjectToTable>::New();
> polyDataToTable->SetInputConnection(pf->GetOutputPort());
> polyDataToTable->SetFieldType(vtkDataObjectToTable::POINT_DATA);
> polyDataToTable->Update();
>
> Jothy
>
> On Wed, May 9, 2012 at 2:17 PM, Brian Curtis 
> <bcurtis3 at masonlive.gmu.edu <mailto:bcurtis3 at masonlive.gmu.edu>> wrote:
>
>     Hi,
>
>     I'm looking for an example that does this or a few examples that
>     show the proper way to do this.
>
>     I'm not sure how to understand vtkProbeFilter from
>     http://www.vtk.org/doc/nightly/html/classvtkProbeFilter.html and
>     what part of it will do the work I need.
>
>     vtkProbeFilter->Probe requires three vtkDataSet but how do I get
>     my points into a dataset?
>
>     Thanks for your help,
>     ~Brian
>
>     On 05/08/2012 11:10 AM, Brian Curtis wrote:
>
>         Hi,
>
>         I am interested in creating the following simple example in
>         order to expand off of at a later time:
>         - Create a cube (8 points) with scalar values all set to 1
>         - Create a line (5 points) that intersects with cube
>         - Get scalar interpolations for the line from the cube
>
>         Cube pts:
>         float pts[8][3] = { {-1.0, -1.0, -1.0}, {-1.0, 1.0, -1.0},
>                                {-1.0, 1.0, 1.0}, {-1.0, -1.0, 1.0},
>                                {1.0, -1.0, -1.0}, {1.0, 1.0, -1.0},
>                                {1.0, 1.0, 1.0}, {1.0, -1.0, 1.0} };
>         Line pts:
>         float line[5][3] = { {-2.0, 2.0, -2.0}, {-1.0, 1.0, -1.0},
>                                 {0.0, 0.0, 0.0}, {1.0, -1.0, 1.0},
>         {2.0, -2.0, 2.0} };
>
>         I could not find a simple example to do this, and I'm not
>         exactly sure if probefilter is the right way to go about this.
>         What the best (and easiest) way to approach this problem?
>
>         Thanks,
>         ~Brian
>
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>
> -- 
> Jothy
>

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