[vtkusers] vtkContourfilter produces uncomplete surface when cutting hex mesh

[Hans Gruendel]

Hi Bill,

thanks for your answer. You gave me an important hint: Result of the 
contour filter is always a set of triangles. Very good to know.

I will check the rectangle with regards to planarity (right word?).
Greetings Hans

Bill Lorensen schrieb:
> A rectangle might not be planar which may give some renderers trouble.
> The contour filter always produces triangles.
>
>
> On Wed, Oct 14, 2009 at 3:09 PM, Hans Gruendel <hans.gruendel at web.de> wrote:
>   
>> Hi All,
>>
>> this is my first email here.
>>
>> I use the vtkContourFilter on an unstructured 3D Grid.
>> Case 1: Cells are Tetraeder (Type 10) --> everything is fine.
>> Case 2. Cells are Hexaeder (Type 12) --> the resulting surface is not
>> complete. Each cutted face is divided into 4 triangles. An rectangle would
>> fill the whole.
>>
>> My question: Is there any method to produce a complete surface from a
>> Hexaeder mesh using the contour filter without any wholes?
>>
>> Looking forward to your help
>>
>> Best regards
>>
>> Hans
>>
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