[Paraview] vtkImplicitBoolean + UnstructuredGrids

[Vinicius Pessôa]

Hi Amy! Thank you so much for answering again.

Before your
help, I was just using the vtkClipDataSet. By your using vtkCutter idea, I
now have an UnstructuredGrid with its respective scalars making the
contour of my cut / clip. The idea is for me to use this UG as an implicit
function for clipping a vtkSphereSource, so I can get the volumetric
intersection of the sphere with the arthery (thats right, I need the
sphere piece that is inside arthery). But my problems (since from the
beginning) are actually on using the vtkImplicitDataSet feeded by a
vtkUnstructuredGrid. When I use an structured grid, the vtkImplicitDataSet
works perfectly. But using a UG, it doesn`t.

Any Ideas? Amy?
Anyone?
________________________________________ 
Atenciosamente, 
Vinicius Pessôa 
Analista de Sistemas

Laboratório Nacional de Computação
Científica 
+55 (24) 2242-9498 
+55 (24) 8803-7061


> Hi Vinicius, 
> 
> If you want to fill
the clipped area, you could try the following. In 
> addition to
using vtkClipDataSet, also pass your original unstructured 
> grid
through the vtkCutter filter. Use the same vtkSphere implicit 
>
function that you used with vtkClipDataSet. Then to put the output of 
> vtkClipDataSet and vtkCutter together, you could use
vtkAppendFilter. 
> The output of vtkAppendFilter is still
vtkUnstructuredGrid. 
> 
> - Amy 
> 
>
Vinicius Pessôa wrote: 
>> Hi Amy! 
>> Thank
you for answering! 
>> 
>> And the answer for your
question is yes, I`ve tried to use 
>> vtkClipDataSet. The
problem is that I need to fill the clipped area, 
>> just like
the Ice Cream example. Then also, I would end up getting to 
>>
the old problem, that is having to use my UnstructuredGrid as an 
>> implicit function to make operation with a sphere. And also, I
would 
>> probably have to sew the two meshes manually. 
>> 
>> That`s why I`ve changed my path for resolving
this problem to the 
>> vtkImplicitBoolean. But, I`ve no
problems with changing my path again. 
>> So, if any solution
appears with another tools, I`m all ears! 
>> : ) 
>> 
>> Thank`s again for your time! 
>>
________________________________________ 
>> Atenciosamente,

>> Vinicius Pessôa 
>> Analista de Sistemas

>> Laboratório Nacional de Computação
Científica 
>> +55 (24) 2242-9498 
>> +55
(24) 8803-7061 
>> 
>> 
>> > Hi
Vinicius, 
>> > 
>> > In ParaView (or VTK),
have you tried applying the Clip filter to your 
>> >
unstructured grid? You can use a vtkSphere as the clip function. This 
>> > way you don't have to convert your dataset to an implicit
function. 
>> > 
>> > - Amy 
>>
> 
>> > Vinicius Pessôa wrote: 
>>
>> Hi All. 
>> >> 
>> >> That`s
more like a VTK question. But maybe some of you have had a 
>>
>> problem like this. 
>> >> 
>>
>> I have an UnstructuredGrid witch I must take the difference of it

>> from 
>> >> a vtkSphere implicit function.

>> >> 
>> >> Basically, I`m using the
vtkImplicitDataSet to turn my UG into an 
>> >> Implicit
Function and the using the vtkImplicitBoolean to make its 
>>
>> difference (just like the IceCreamBite example, also using the

>> >> vtkSampleFunction). I`ve also added some scalars
to the Unstructured 
>> >> Grid, so the ImplicitDataSet
filter stops complaining. Well, as 
>> Output 
>>
>> I`m getting just the sphere. 
>> >> 
>> >> I have also tried the vtkGeometryFilter, but it had no
effect. 
>> >> 
>> >> If anyone has been
through something like this and could get me a 
>> >>
hand, I would really apreciate. 
>> >> 
>>
>> Thank`s in advance to you all. 
>> >> 
>> >> [ ]`s 
>> >>
________________________________________ 
>> >>
Atenciosamente, 
>> >> Vinicius Pessôa 
>> >> Analista de Sistemas 
>> >>
Laboratório Nacional de Computação Científica

>> >> +55 (24) 2242-9498 
>> >> +55
(24) 8803-7061 
>> >> 
>>
------------------------------------------------------------------------

>> >> 
>> >>
_______________________________________________ 
>> >>
ParaView mailing list 
>> >> ParaView at paraview.org 
>> >> http://www.paraview.org/mailman/listinfo/paraview 
>> >> 
>> > 
>> > -- 
>> > Amy Squillacote 
>> > Kitware, Inc. 
>> > 28 Corporate Drive 
>> > Clifton Park, NY
12065 
>> > Phone: (518) 371-3971 x106 
>> >

>> > 
>>
------------------------------------------------------------------------

>> 
>>
_______________________________________________ 
>> ParaView
mailing list 
>> ParaView at paraview.org 
>>
http://www.paraview.org/mailman/listinfo/paraview 
>> 
> 
> -- 
> Amy Squillacote 
> Kitware, Inc.

> 28 Corporate Drive 
> Clifton Park, NY 12065 
>
Phone: (518) 371-3971 x106 
> 
>
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