[vtkusers] Fill contour

[David Gobbi]

You can try vtkLinearExtrusionFilter, to extrude the filled contour towards
the camera (use CappingOn()).

On Tue, Mar 15, 2016 at 7:53 PM, Jothybasu Selvaraj <jothybasu at gmail.com>
wrote:

> Looks like it has something to do with the resolveCoincidentTopology. The
> filled contour is at the same depth as the image slice -that's why it is
> not shown.
>
>
> Jothy
>
> On Wed, Mar 16, 2016 at 12:41 PM, Jothybasu Selvaraj <jothybasu at gmail.com>
> wrote:
>
>> I commented this line in the original code.
>>
>> polyActor->GetProperty()->SetRepresentationToWireframe();
>>
>>
>> On Wed, Mar 16, 2016 at 12:40 PM, Jothybasu Selvaraj <jothybasu at gmail.com
>> > wrote:
>>
>>> Hi David
>>>
>>> If I set the representation to surface only the outline is shown. I even
>>> tried it with a vtkPolyDataMapper and the results are same.
>>>
>>> Here is the rough pipeline
>>>
>>> vtkSmartPointer<vtkPolyData>contour=
>>>
>>>             vtkSmartPointer<vtkPolyData>::New();
>>>
>>>     contour=this->ContourWidget->GetContourRepresentation()->GetContourRepresentationAsPolyData();
>>>
>>>
>>>
>>>     vtkSmartPointer<vtkContourTriangulator>tc=
>>>
>>>             vtkSmartPointer<vtkContourTriangulator>::New();
>>>
>>>     tc->SetInputData(contour);
>>>
>>>     tc->Update();
>>>
>>>
>>>
>>>
>>>     vtkSmartPointer<vtkDataSetMapper> polyMapper =
>>>
>>>             vtkSmartPointer<vtkDataSetMapper>::New();
>>>
>>>     polyMapper->SetInputData(tc->GetOutput());
>>>
>>>     polyMapper->ScalarVisibilityOn();
>>>
>>>     polyMapper->Update();
>>>
>>>
>>>
>>>      this->polyActor =
>>>
>>>             vtkSmartPointer<vtkActor>::New();
>>>
>>>     polyActor->SetMapper(polyMapper);
>>>
>>>     polyActor->GetProperty()->SetColor(0,1,0);
>>>
>>>     polyActor->GetProperty()->SetRepresentationToWireframe();
>>>
>>>
>>>     this->ViewRenderer->AddActor(this->polyActor);
>>>
>>>     this->ViewRenderer->GetRenderWindow()->Render();
>>>
>>>     this->ViewRenderer->ResetCamera();
>>>
>>>
>>> Thanks
>>>
>>>
>>> Jothy
>>>
>>>
>>> On Wed, Mar 16, 2016 at 12:24 PM, David Gobbi <david.gobbi at gmail.com>
>>> wrote:
>>>
>>>> Hi Jothy,
>>>>
>>>> The vtkContourTriangulator always produces a filled contour, so there
>>>> must be something wrong with the way it is being rendered.  Are you sure
>>>> that you aren't calling SetRepresentationToWireframe() on the actor's
>>>> property?
>>>>
>>>>  - David
>>>>
>>>>
>>>> On Tue, Mar 15, 2016 at 5:45 PM, Jothybasu Selvaraj <
>>>> jothybasu at gmail.com> wrote:
>>>>
>>>>> Hi All
>>>>>
>>>>> I am trying to fill a 2D contour generated by vtkContourWidget. I pass
>>>>> the polydata from the contour widget to vtkContourTriangulator and the
>>>>> output is as shown in the attached image. But, I want a filled contour. How
>>>>> do I do that?
>>>>>
>>>>>
>>>>> Thanks
>>>>>
>>>>> Jothy
>>>>>
>>>>
>>>>
>>>
>>
>
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