[vtkusers] Hide non visible labels on a 3d model

[Yumin Yuan]

Hi Fernando,

You got a quite complicated pipeline here :). Just a thought without
knowing all the details, you may try to decrease the Tolerance value in
vtkSelectVisiblePoints. The default value might not work well with your
data.

Yumin

On Thu, Jan 28, 2016 at 11:23 AM, Fernando Nellmeldin <
f.nellmeldin at open-engineering.com> wrote:

> Hello.
> Does anyone has any tips?
> Thank you.
>
> 2016-01-25 10:39 GMT+01:00 Fernando Nellmeldin <
> f.nellmeldin at open-engineering.com>:
>
>> Hello.
>> I'm trying to show the values of a contour as labels. Each label is fixed
>> to a point in the contour. I do not want to show the labels that are
>> anchored to points that are not visible.
>>
>> To achieve this, I followed these two examples:
>> http://www.vtk.org/Wiki/VTK/Examples/Cxx/Visualization/LabelContours
>>
>> http://www.vtk.org/gitweb?p=VTK.git;a=blob;f=Examples/Annotation/Python/labeledMesh.py
>>
>> Unfortunately, the removal of hidden points (and thus, of labels) is not
>> working as expected. I attach three pictures of the behavior when I move
>> the camera. Look at the values on the top (365 and 399).
>>
>> The Pipeline I am using is the following:
>> vtkUnstructuredGrid -> vtkGeometryFilter -> vtkContourFilter ->
>> vtkStripper -> (create a vtkPolyData with one point of each contour) ->
>> vtkSelectVisiblePoints -> vtkLabeledDataMapper -> vtkActor2D.
>>
>> I am using VTK 5.10 but I tried with VTK 6.3 and the problem is worse
>> (nothing is hidden). This is under Windows 8.1.
>>
>> Any ideas?
>>
>> Thank you.
>>
>>
>
>
> --
> *Fernando NELLMELDIN*
> Software Engineer
> *_______________________________________________________________*
>
> *Open Engineering s.a.*
>
> Rue Bois Saint-Jean 15/1
> B-4102 Seraing (Belgium)
> Tel: +32.4.353.30.34
>
> http://www.open-engineering.com
>
> https://www.linkedin.com/company/open-engineering?trk=biz-companies-cym
>
>
> *_________________________________________________________________________*
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> http://public.kitware.com/mailman/listinfo/vtkusers
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/vtkusers/attachments/20160128/92e3769f/attachment.html>