[vtkusers] vtkHardwareSelector Can't work with vtkUnstructuredGrid data?

[David E DeMarle]

I haven't seen it fail in a long time so I can not say what is wrong.

In order for us to help you will have to provide a small sample of code so
we can replicate the problem.

ParaView uses the same hardware selector, it just has extra layers of
complexity on top because of its client/server parallel render windows.
Thus there must be something different in the setup it does from what your
program does.

hope that helps


David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909

On Tue, Nov 11, 2014 at 10:38 PM, Xianliang.Zeng <xjtuzxl at 163.com> wrote:

> Thanks very much.
>
> vtkHardwareSelector seems to select point sometimes wrong, but it works
> very well with cell.
> Why doesn't paraview have such problem about selecting points?
>
>
> At 2014-11-10 23:58:24, "David E DeMarle" <dave.demarle at kitware.com>
> wrote:
>
> VTK won't render UnstructuredGrid (UG) directly (other than in volume
> rendering) either.
>
> So, apply the vtkDataSetSurface (DSSF) filter to convert the outer skin of
> the UG data into a vtkPolyData and render+select that.
>
> The PassThough*Ids methods on the DSSF are there to maintain the
> correspondence of input cells to output cells so that you can figure out
> what exactly was selected in the UG.
>
> cheers
>
>
> David E DeMarle
> Kitware, Inc.
> R&D Engineer
> 21 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-881-4909
>
> On Mon, Nov 10, 2014 at 12:48 AM, Xianliang.Zeng <xjtuzxl at 163.com> wrote:
>
>> Hello
>>
>> I want to select cells in a vtkUnstructuredGrid data, and I created a
>> vtkHardwareSelector for it. And then I found nothing can be selected.
>> By the way, I test the vtkHardwareSelector with a vtkPolyData, and it
>> works well.
>> So, why can't vtkHardwareSelector select cells from vtkUnstructuredGrid?
>>
>> Best regards,
>> Shane
>>
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