[vtkusers] vtkCellPicker: Check for a particular actor?

[David Gobbi]

On Wed, Mar 4, 2015 at 8:29 AM, DVigneault <davis.vigneault at gmail.com>
wrote:

>
> vtkProp3DCollection* props =
> static_cast<vtkCellPicker*>(this->InteractionPicker)->GetProp3Ds();
>
> static_cast<vtkProp3DCollection*>(props)->IsItemPresent(this->IntendedActor);
>
> ...but I then get an "invalid use of incomplete type" error on the last
> line.  How can I go about ensuring that I've picked the right actor?
>

If the compiler says "invalid use of incomplete type", that means you
forgot to
include the header:

#include <vtkProp3DCollection.h>

 - David
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