[vtkusers] A simple VTK file format definition issue?

[David E DeMarle]

Yes both are problems. Search the mailing list for past discussions of why
that is a problem and what you might do about it.
On Jun 30, 2012 6:25 AM, "Alex Southern" <mrapsouthern at gmail.com> wrote:

>
> Aha yes they are,  and they could potentially not be in a single plane, is
> that a problem?
>
> Cheers
> A.
>
> On 6/30/2012 1:22 PM, David E DeMarle wrote:
>
> Are the last two polygons concave?
> On Jun 30, 2012 5:58 AM, "Alex Southern" <mrapsouthern at gmail.com> wrote:
>
>> Hi,
>>
>> Iver been looking at this for a couple of hours and I just cant find the
>> probelm.
>> What is wrong with this geometry definition?
>>
>> The last 2 polygons do not show up correctly, they produce the desired
>> polygon plus some additional unwanted planes, that flicker as you rotate
>> the model. The problem must be in this definition as it also occurs in
>> Paraview.
>>
>> Any help, have i got the format wrong or something?
>>
>> Thanks
>> A.
>>
>> # vtk DataFile Version 3.0
>> my VTK file
>> ASCII
>> DATASET POLYDATA
>> POINTS 16 float
>> 4.000000 3.000000 3.000000
>> 4.000000 0.000000 3.000000
>> 4.000000 0.000000 0.000000
>> 4.000000 3.000000 0.000000
>> 6.000000 3.000000 0.000000
>> 6.000000 7.000000 0.000000
>> 6.000000 7.000000 3.000000
>> 6.000000 3.000000 3.000000
>> 3.000000 7.000000 0.000000
>> 3.000000 7.000000 3.000000
>> 3.000000 4.000000 0.000000
>> 3.000000 4.000000 3.000000
>> 0.000000 4.000000 0.000000
>> 0.000000 4.000000 3.000000
>> 0.000000 0.000000 0.000000
>> 0.000000 0.000000 3.000000
>> POLYGONS 10 58
>> 4 0 1 2 3
>> 4 4 5 6 7
>> 4 5 8 9 6
>> 4 8 10 11 9
>> 4 10 12 13 11
>> 4 12 14 15 13
>> 4 15 14 2 1
>> 4 0 3 4 7
>> 8 4 3 2 14 12 10 8 5
>> 8 6 9 11 13 15 1 0 7
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>
>
>
>
>
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Follow this link to subscribe/unsubscribe:
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