[vtkusers] Fwd: vtkTubeFilter Side/Border Thickness

[Fauze Polpeta]

Hi David;

I tried to use the vtkExtractPolyDataGeometry clipper but,
unfortunately the clipping function is not applied to the
vtkPolyDataToPolyDataFilter (vtkTubeFilter in my case). Indeed, it
considers the abstraction over which the filter is connected
(vtkLineSource in my case). So what happens? The the ring built with
vtkTubeFilter disappears as whole since the vtkLineSource is who is
being fully clipped.

As a solution, I'm considering the adoption of a vtkCylinderSource and
vtkCylinder for clipping. However, as I'm not a math expert (and not
even VTK), I can not figure out how to positioning a Cylinder using
two 3D points. vtkLineSource provides me with an interface for that,
but it seems that vtkCylinder and vtkCylinderSource not.

Is there a way of doing this? Aligning a cylinder between two points.

Regards

Fauze

On Thu, Apr 8, 2010 at 3:25 PM, Fauze Polpeta <fauze.polpeta at gmail.com> wrote:
> Hi David;
>
> I think I need to fallback to the first approach you suggested.
> Gobbi's clipper relies on a vtkPlaneCollection to perform clipping. In
> my case I have to clip using a vtkPolyDataToPolyDataFilter (i.e.
> vtkTubeFilter) which is inherently different from vtkImplicitFunction
> (i.e. vtkPlane).
>
> Thanks
>
> Fauze
>
>
>
> On Thu, Apr 8, 2010 at 2:32 PM, David Doria <daviddoria+vtk at gmail.com> wrote:
>> On Thu, Apr 8, 2010 at 1:25 PM, Fauze Polpeta <fauze.polpeta at gmail.com> wrote:
>>> Hi;
>>>
>>> I will try that and let you know the results.
>>>
>>> If it works fine I will certainly try to add this to vtkTubeFilter.
>>>
>>> Thank you very much.
>>>
>>> Fauze
>>
>> Fauze,
>>
>> David Gobbi has just added a new class that will reduce the number of
>> steps in this operation:
>> http://www.vtk.org/Wiki/VTK/Closed_Surface_Clipping
>>
>> You would just need to make the outer cylinder (radius R2, length L,
>> CappedOn), and clip it
>> (using closed surface clipping) with a slightly longer inner cylinder
>> (R1, L+epsilon).
>>
>> Thanks,
>>
>> David
>>
>