[vtkusers] Selection with vtkCompositePolyDataMapper2 mapper problem

Alex Malyushytskyy alexmalvtk at gmail.com
Mon Jul 13 20:50:40 EDT 2015

Attempt to upgrade to vtk-6-2-0 did not fix the problem

On Fri, Jul 10, 2015 at 10:26 PM, Alex Malyushytskyy <alexmalvtk at gmail.com>

> Using vtkHardwareSelector with vtkMultiBlockDataSet and vtkCompositePolyDataMapper2
> sometimes is producing wrong results.
> I have a vtkMultiBlockDataSet with polydata (sometimes NULL) as blocks.
> On the screenshot you can see the simplest  geometry which I can reproduce
> the problem on. Each rectangle there is a separate block.
> It also displays window frame which supposed to define selection.
> As you can see results (in red like colors) There is an extra block
> selected which is totally outside of the frame.
> Relative  functions which do selection and extraction are available in the
> attachment.
> For some reason if I select a single component - basically by clicking
> without dragging selection frame, result is always correct.
> Result seems also depends on view angle.
> I tracked  that wrong results appear after vtkConvertSelection::ToSelectionType
> in converted to vtkSelectionNode::BLOCKS
> vtkSelection.
> I would appreciate any help or ideas.
> I am using vtk-6-1-0.
> Regards,
>       Alex
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