[vtkusers] Boolean operations with tubeFilters partially hide geometry

[Malsoaz James]

You just have to replace the current vtkImplicitPolyDataDistance files with mine and recompile VTK.

Note that the result is not perfect since it increases the computation time for big meshes. Anyway, it works.
I'm hoping that some of the initial developers will come back to this bug and find a better solution.

Best.


________________________________
 De : Jon Haitz Legarreta <jhlegarreta at vicomtech.org>
À : Malsoaz James <jmalsoaz at yahoo.fr> 
Cc : "vtkusers at vtk.org" <vtkusers at vtk.org> 
Envoyé le : Lundi 8 octobre 2012 11h13
Objet : Re: [vtkusers] Boolean operations with tubeFilters partially hide geometry
 

Dear James,
thank you for the tips.

I am trying to figure out if your vtkImplicitPolyDataDistance class contribution would help me somehow solve the issue. 

Would you be able to post some simple example on how to use it?

Thank you.
JON HAITZ





On 1 October 2012 10:41, Malsoaz James <jmalsoaz at yahoo.fr> wrote:

Hi,
>
>
>You should be aware that the vtkBooleanOperationPolyDataFilter has several bugs. 
>
>You can find information about it on previous threads:
>http://vtk.1045678.n5.nabble.com/PolyData-Boolean-operation-problem-td5714926.html
>http://vtk.1045678.n5.nabble.com/Holes-in-mesh-after-vtkBooleanOperationPolyDataFilter-td5713284.html
>
>
>Best
>James
>
>
>
>________________________________
> De : Jon Haitz Legarreta <jhlegarreta at vicomtech.org>
>À : vtkusers at vtk.org 
>Envoyé le : Mercredi 26 septembre 2012 17h48
>Objet : [vtkusers] Boolean operations with tubeFilters partially hide geometry
> 
>
>
>Hi there,
>I am facing some problems with a boolean filter (vtkBooleanOperationPolyDataFilter) applied to a pair of vtkTubeFilter. The thing is that for my application the vtkTubeFilterfits better than a vtkCylinderSource. Besides, I want the capping property of the tubeFilter to be off.
>
>I use a vtkTriangleFilter in order to transform the tubeFilters into objects that the boolean filter can deal with.
>
>When performing an intersection boolean operation, it seems like capping is necessary in order to get acceptable results. However, since I cannot erase the cap to the actor yielded by the boolean operator, this is not a good solution.
>
>On the other hand, I can give some "thickness" to the tubeFilter by creating an "inner" tubeFilter and then applying the difference boolean operator. 
>
>However, then the problem is that the inner wall of the resulting actor seems not to have a geometry. Or at least it is not shown. 
>
>Setting the backfaceculling property on does not change things.
>
>I have attached some images in order to clarify things.
>
>Any guess?
>
>Thank you,
>JON HAITZ
>
>
>
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