[vtkusers] Selected cells not visible

[Alex Malyushytskyy]

I printed information on selection modifying example:

		vtkIdType numNodes = selection->GetNumberOfNodes();
		for(int iNode=0; iNode < numNodes; iNode++)
		{

			std::cout << "Node: " << iNode << endl;
			vtkIdType listSize =
selection->GetNode(iNode)->GetSelectionList()->GetNumberOfTuples();
			for(int iVal=0; iVal < listSize; iVal++)
			{
				std::cout << "\t" << iVal << "\t" <<
selection->GetNode(iNode)->GetSelectionList()->GetVariantValue(iVal)
<< endl;
			}
		}

And even though example does not  change the color it looks like it
does  pick up the correct (visible only)  cells .
So check that you do not have anti-aliasing set otherwise you might
get cells which are not visible partially visible.

Alex


On Wed, Feb 13, 2013 at 3:38 PM, Alex Malyushytskyy
<alexmalvtk at gmail.com> wrote:
> It looks like I was mistaken and it prints number of vtkSelectionNode
> s which may be a valid number in this case,
> but as I understand example was supposed to color selection (assign
> red color ) and I do not see this happen.
>
>
> On Wed, Feb 13, 2013 at 3:21 PM, Alex Malyushytskyy
> <alexmalvtk at gmail.com> wrote:
>> I phrased it incorrectly.
>>
>> Selection ( visible triangles ) should have at least 3 nodes and in
>> reality more , depending on the on the point of view.
>> unless I misunderstand something which is fairly possible.
>>
>> Alex
>>
>> On Wed, Feb 13, 2013 at 3:13 PM, Alex Malyushytskyy
>> <alexmalvtk at gmail.com> wrote:
>>> Check that you window does not have anti-aliasing
>>>
>>> In C++ and mentioned above example it is set with line :
>>>   renderWindow->SetMultiSamples(0);
>>>
>>> I am not sure that
>>> http://www.cmake.org/Wiki/VTK/Examples/Cxx/Filtering/ExtractVisibleCells
>>> works as expected at least at my vtk version.
>>>
>>> Initiating selection over sphere and over bacjground always prints
>>> "Selection has 2 nodes",
>>> Even though if it were supposed to select cells I would expect it to
>>> be 3 nodes cause sphere is built from triangles.
>>>
>>>
>>> Alex
>>>
>>> On Wed, Feb 13, 2013 at 12:26 PM, -Daniel- <ich_daniel at habmalnefrage.de> wrote:
>>>> I included the following line
>>>>   selector.SetFieldAssociation(1);
>>>>
>>>> But this solved not the problem. My selected cells are still invisible. (but
>>>> nodes founded..)
>>>>
>>>>
>>>>
>>>> --
>>>> View this message in context: http://vtk.1045678.n5.nabble.com/Selected-cells-not-visible-tp5718419p5718506.html
>>>> Sent from the VTK - Users mailing list archive at Nabble.com.
>>>> _______________________________________________
>>>> 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
>>>>
>>>> Follow this link to subscribe/unsubscribe:
>>>> http://www.vtk.org/mailman/listinfo/vtkusers