[vtkusers] Help for using of cone source

[Rong Xu]

Dear David Doria & Bill Lorensen;

I am sorry, I made a mistake. The number of points with
vtkLinearSubdivisionFilter has been about 3 times compared with the number
of points without vtkLinearSubdivisionFilter for a cone source. Also I
displayed point cloud of a cone source which has been subdivided by
vtkLinearSubdivisionFilter in Img-01.png (Img-00.png shows the point cloud
of a cone source without subdivision).

My new problem is that I want to much more points than one subdivision by
vtkLinearSubdivisionFilter. I know I can use vtkLinearSubdivisionFilter for
many times to realize this purpose, for example I use
vtkLinearSubdivisionFilter 10 times to obtain much more points, but is
there any simple method to realize the same purpose ?

Thank you!

2012/5/11 Bill Lorensen <bill.lorensen at gmail.com>

> Rong,
>
> I believe that David is correct. Subdivision only works on triangles,
> so add a vtkTriangleFilter before the subdivision filter.
>
> Bill
>
> On Thu, May 10, 2012 at 11:08 AM, David Doria <daviddoria at gmail.com>
> wrote:
> >> I tried subdivision on above link, but the number of points is not
> changed
> >> on vtkConeSource. Moreover, I used subdivision on vtkSphereSource, the
> >> number of points on sphere is increased. So I do not know why there is
> no
> >> effect on vtkConeSource?
> >
> > Please send some compilable code that shows that the number of points
> > is not changing. The only thing I could suggest is to use the
> > vtkTriangleFilter on the vtkConeSource before using a subdivision
> > filter.
> >
> > David
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> --
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>



-- 

---------------------
Best Regards!

===============================================
Rong Xu,  Ph.D Student
Ohya Lab
Graduate School of Global Information and Telecommunication
Studies (GITS), Waseda University
1-6-1 Nishi Waseda, Shinjuku-ku, Tokyo, Japan (¨“169-8050)

Tel:          +81-80-4208-1207
E-mail:     xurong1981 at gmail.com
               xurong at fuji.waseda.jp
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