[vtkusers] stl to Ensite dif conversion

[Bill Lorensen]

Is there a specification of the DIF model format.

Bill

On Mon, Sep 28, 2015 at 1:42 PM, Sebastian Hilbert
<sebastian.hilbert at gmx.net> wrote:
> Hi,
>
> I have a stl file which get produced by a medical software. I need to convert
> this to another formal which is very similar to the vtk ascii format with
> polygonal dataset.
>
> The target format is like this:
>
>  <DIFBody>
>     <Volumes number="1">
>       <Volume name="Left Atrium" color="eae0b2">
>         <Vertices number="3984">
>            32.4603  6.0825  -40.3249
>            13.9858  7.9016  -41.0501
>            16.6287  7.6514  -40.4356
>            30.7806  7.9503  -41.1414
>         </Vertices>
>         <Normals number="3984">
>            0.220882  -0.586701  -0.779098
>            -0.082953  -0.169572  -0.982021
>            0.393210  -0.647443  -0.652842
>            -0.106461  -0.248735  -0.962703
>         </Normals>
>         <Polygons number="7968">
>           3 40 8
>           17 10 13
>           41 13 42
>           4 36 43
>           </Polygons>
>       </Volume>
>     </Volumes>
>     <Labels number="0">
>     </Labels>
>    </DIFBody>
> </DIF>
>
>
> What would be the best way to go about converting stl to Ensite dif ?
>
> I have a sample target file and converted it to stl and vtk with a tool called
> 3D object converter (http://3doc.i3dconverter.com/formats.html) which seems to
> be the only tool able to load Einsite dif files.
>
> Looking at the vtk file the polygons are different from the ones in the xml
> (dif) file. Looking at the stl file (ascii) I can see some vertex lines that
> match a line in the vertices section of the xml (dif) file but there are a lot
> more vertex lines in the stl file then there are in the xml (dif file).
>
> I would prefer to use python if that is an option.
>
> Any help is appreciated.
>
> Sebastian
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