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

[James Matthews]

Thanks for the quick reply. I am not quite sure what you mean. 

I have written out my image data from a vtkImageData object using 
vtkXMLImageDataWriter to a .vti file. 

I have written my polydata out using vtkXMLPolyDataWriter to a .vtp file.

The image data is orientated and locate such that it is a plane through the 
centre of the polydata model (which is a vehicle). 

If I open the files in Paraview (v3.4) it opens the image data in a separate 
window to the polydata. The image data cannot by rotated, just panned in 2D. I 
see options for 'slices' but not sure what I can do with them to solve this 
problem.

Hopefully I've explained the problem reasonably well.

<Apologies if this is a duplicate reply, I have had some email problems and my 
last reply doesn't seem to appear on the list>

On Wednesday 10 December 2008 21:08:46 you wrote:
> 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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