[vtkusers] How to extact the geometry within a bounding box from a vtkPolyData ? Please Help !!!!!

[Deepak Roy]

>
>  Hello,
>
> Thanks for the reply.
>
> But i am using the vtk version 4.2 which does not seem to have the vtkBox
> class.
>
> Is there an alternative way ?
>
> Regards,.
>
> Deepak Roy
>
>
>  On 3/9/06, Randall Hand <randall.hand at gmail.com> wrote:
> >
> > I believe you're looking for vtkCutter, or in the case of polyData,
> > vtkClipPolyData: http://www.vtk.org/doc/release/5.0/html/a01243.html
> >
> > It clips against any implicit function, so if you h ave a ROI that's a
> > box, then vtkBox should do it for ya:
> > http://www.vtk.org/doc/release/5.0/html/a01189.html
> >
> >  On 3/9/06, Deepak Roy < cdeepakroy at gmail.com> wrote:
> >
> > >  Hello everybody,
> >
> > I have an open triangular mesh surface in the form of vtkPolyData.
> >
> > And i also have a Region of Interest ( ROI ) bounding box.
> >
> > How do i extract the geometry within this ROI bounding box from the
> > vtkPolyData surface ?
> >
> > I know that, one method is to create a scalar array and assign all the
> > geometry inside the ROI to be of one value ( inside value ) and all the
> > geometry outside the ROI to be of another value ( outside value ).
> >
> > But for this, i have to write a loop which sets a scalar value for each
> > and every point in the vtkPolyData, which will take a long time.
> >
> > I was looking for a vtk filter which can do this clipping
> > faster.........or is there a way to generate the scalars faster ?
> >
> > I am sure there is a nice way of doing this and i am sure there might be
> > a VTK filter for this job, since this is a very commonly
> > performed operation.
> >
> > But i could not find a filter in vtk for this.
> >
> > Does any one know how to do this ?
> >
> > Thanks in advance.
> >
> > Regards,
> >
> > Deepak Roy
> >
> >
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> >
> >
> >
> >
> > --
> > Randall Hand
> > Visualization Scientist,
> > ERDC-MSRC Vicksburg, MS
> > Homepage: http://www.yeraze.com
> >
>
>
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