[vtkusers] vtkTubeFilter and vtkpolyline problems

[David.Pont at ensisjv.com]

"Franke, Stephan" <Stephan.Franke at inpro.de>g wrote on 23/03/2006 00:28:07:

> Hi all,
>
> Long time ago that this question was posted inside this forum, but I
> have the same problem and could not find an answer with a solution
> for this problem here.
> So I want to ask this question once again in hope to get a solution.
> Thank you in advance for your help.
>
> Best regards,
> Stephan Franke
>
>
> OLD POST
> -------------------------------------------------------------------------
> Hi all,
>
> I am writing a program where I would like to display a boundary. The
> boundary must be like a thick line.
> If I use a polyline I get, when the line thickness is larger then 1,
> nasty looking joints at the vertices and if I use the tubefilter the
> thickness of the tube is not constant especially there where I have
> sharp angles.
>
> Are there any options I can use to overcome these problems?
> Thank you
>
>
----------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Dipl. Ing.  Stephan Franke
> Arbeitsfeld Aufbau (AB)
> Umform- und Fügesimulation
>
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You could use vtkImplicitModeller and vtkContourFilter on a polyline. In
theory this will give tubes with constant radius and 'smooth' joins. But
with SampleDimensions high enough to get adequate resolution on relatively
narrow 'tubes' it could be very slow!

    Dave P