[Paraview] Export polydata and texture map in vtk file for viewing in paraview

[Berk Geveci]

In 3.4, if you load a 2D image and show it using the Slice
representation, ParaView will use texture map automatically. So you
shouldn't need to do anything but load the image data directly.

-berk

On Wed, Dec 10, 2008 at 2:34 PM, James Matthews
<james.matthews at earthling.net> wrote:
> Hi, I would like some advice regarding displaying a 2D slice of scalar data
> on a structured grid in a 3D scene containing polydata using Paraview.
>
> I have a 2D slice of data from an FE analysis which with I want to view in
> Paraview. I want to view it on a 2D plane within a 3D 'scene' consisting of
> 3D polydata. For example I have a vehicle placed in the center of the scene
> which is imported from a .vtp file I have created. I have analysis results
> on a plane through the centre of the vehicle. This is scalar data on a 2D
> structured grid. I want to be able to import the vehicle model in .vtp
> format and import the analysis results in a standard vtk format and view
> both.
>
> The analysis data I have in an vtkimagedata object. One solution is to use
> the geometry filter and create polydata and write this to a .vtp file. e.g.
> (assuming the image data is stored in *id);
>
> vtkImageDataGeometryFilter *idf = vtkImageDataGeometryFilter::New();
> idf->SetInput(id);
>
> vtkXMLPolyDataWriter *writer = vtkXMLPolyDataWriter::New();
> writer->SetInput(idf->GetOutput());
> writer->SetFileName(fname.c_str());
> writer->Write();
>
> For large data sets the visualisation is slow. What I really want to do is
> create a plane and texture map the analysis data onto it. I can create a
> plane with texture coords and export this separately as a .vtp file. I can
> also export the image data as an image file (png/jpeg etc.). In paraview I
> can then open the .vtp file containing the plane with texture coords and
> then apply the texture by reading in the image.
>
> However, can I do this using a single file? Is there a way to have the
> texture mapped polydata and texture in one file so that when it is opened
> you see the texture mapped polydata? Have I gone  about this all wrong? Any
> better ideas as to how I do this?
>
> Many Thanks,
>
> JM
>
>
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