[vtkusers] Build my own polydata ?

[David Doria]

On Mon, Dec 7, 2009 at 12:09 PM, David Gobbi <david.gobbi at gmail.com> wrote:
> On Mon, Dec 7, 2009 at 10:00 AM, David Gobbi <david.gobbi at gmail.com> wrote:
>> On Mon, Dec 7, 2009 at 9:45 AM, Adeline Joliet <adeline_joli at hotmail.com> wrote:
>>> Hello,
>>>
>>> Here my question, I'using AreaPicker to get the frustum (getClipPoint)
>>> created from 4 points.getClipPoint return me the 8 points (8 vertices) that
>>> define the selected frustum.
>>>
>>> Is there any posibilitie to build a polydata from that ? If so, how ?
>>>
>>> any help would be appreciable :)
>
> Ignore my last email, it will probably be much easier to use the
> vtkFrustumSource.  It doesn't do exactly what you want (it needs the
> frustum as a vtkPlanes object, not as eight points) but it's still
> much better than having to build the polydata from scratch.  You just
> have to create a vtkPlanes object from your eight points.
>
>   David
> _______________________________________________

There is a shell of an example here (it doesn't current work/do anything):
http://www.vtk.org/Wiki/Frustum

Adeline, if you figure out how to construct a frustum it would be nice
if you could add it to the example (or at least report back here with
some short code)

Thanks,

David