[vtkusers] slice structured grid with polydata

[Bill Lorensen]

I updated and added two wiki examples:
http://www.vtk.org/Wiki/VTK/Examples/Cxx/Meshes/ClipDataSetWithPolyData
http://www.vtk.org/Wiki/VTK/Examples/Cxx/Meshes/TableBasedClipDataSetWithPolyData

The table based method seems superior.

Justin, thanks for investigating the two approaches.

Bill

On Fri, Mar 25, 2016 at 11:02 AM, Bill Lorensen <bill.lorensen at gmail.com>
wrote:

> Agreed, the TableBased version just a much better job and retains the
> hexahedrons that are completely inside the clipped region.
>
> I'll also add a C++ example.
>
>
> On Fri, Mar 25, 2016 at 9:16 AM, Cory Quammen <cory.quammen at kitware.com>
> wrote:
>
>> Awesome, thanks!
>>
>> Cory
>>
>> On Fri, Mar 25, 2016 at 12:11 PM, Justin Weber <onlyjus at gmail.com> wrote:
>>
>>> vtkTableBasedClipDataSet looks like what I want.
>>>
>>>
>>> I tried a cube. Background mesh is 9x9x9 = 729 cells
>>>
>>>
>>> cell breakdown:
>>>
>>> tetra: 8
>>>
>>> wedge: 84
>>>
>>> hexahedron: 637
>>>
>>> total: 729
>>>
>>>
>>> Thanks for all your help! I'll add another example using
>>> vtkTableBasedClipDataSet  to the wiki.
>>>
>>> Justin
>>>
>>> [image: Inline image 2]
>>>
>>> On Thu, Mar 24, 2016 at 9:04 PM, Justin Weber <onlyjus at gmail.com> wrote:
>>>
>>>> Every hex is converted to 5 tets.  So the "background mesh" starts with:
>>>> 51x51x51x5 = 663,255 tets
>>>>
>>>> Volume cone / volume of mesh * tets = 1÷3×3.14×.5^2×1÷8×663255=21694
>>>>
>>>> Does seem a little off...
>>>>
>>>
>>>
>>
>>
>> --
>> Cory Quammen
>> R&D Engineer
>> Kitware, Inc.
>>
>
>
>
> --
> Unpaid intern in BillsBasement at noware dot com
>



-- 
Unpaid intern in BillsBasement at noware dot com
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