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

[Fernando Nellmeldin]

Hello and thank you for your response.
Indeed I have tried with different Tolerance values. The screenshots were
made with tolerance of 0.001.
Right now (after your message), I'm using 0.0001. It improved the behavior
but still I have some annoying flickering (labels appear and disappear)
when I move the camera.

Thank you.

2016-01-28 19:32 GMT+01:00 Yumin Yuan <yumin.yuan at kitware.com>:

> 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
>>
>>
>


-- 
*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


*_________________________________________________________________________*
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/vtkusers/attachments/20160201/f1790770/attachment.html>