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

[Randall Hand]

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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