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

[David E DeMarle]

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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