[vtkusers] Picker

[David Gobbi]

What version of VTK are you using?  In VTK 5.6, you can do this:

vtkIdType pointId = picker->GetPointId();

The returned pointId will be in the cell returned by GetCellId().

 - David


On Sat, Aug 20, 2011 at 7:34 AM, seaer <wuweitianye at yahoo.com.cn> wrote:
> Hello everyone
>       I am trying to do the following things.  when I click the Interactor
> Window,  I need get  (x,y,z) of a vertex  which is closet  cliked-place in a
> cell which has lots of vertexs. so I used  vtkCellPicker to pick the cell
> ,how can i do next step?
>
>     int *Pos = this->GetInteractor()->GetEventPosition();
>     vtkRenderer *ren = iren->FindPokedRenderer(Pos[0],Pos[1]);
>
>     vtkCellPicker *picker =
> vtkCellPicker::SafeDownCast((iren->GetPicker()));
>     picker->SetTolerance(0.0001);
>     picker->Pick(Pos[0],Pos[1],0.0,ren);
>
>     double *worldPostion = picker->GetPickPosition();
>     int cellId = picker->GetCellId();
>
> thanks a lot !!!!