[vtkusers] connecting points in from vtkPoints

[Bill Lorensen]

Once updated,the stripper will return polylines, one for each contour.

On Sat, Jan 30, 2010 at 2:52 PM, David Doria <daviddoria+vtk at gmail.com> wrote:
> Thanks,
>
> David
>
>
>
> On Sat, Jan 30, 2010 at 12:25 PM, Rakesh Patil <rakeshthp at in.com> wrote:
>> I need to store the points in an array.. but vtkStripper is not returning
>> the points.. i tried implementing it as follows
>>
>> vtkStripper *sp = vtkStripper::New();
>>
>> sp->SetInputConnection( contFilter->GetOutputPort());
>>
>> vtkPoints *pt = sp->GetPoints();
>>
>> Here pt is not showing any values.. It is all empty..
>>
>> ---------- Original message ----------
>> From:Bill Lorensen< bill.lorensen at gmail.com >
>> Date: 30 Jan 10 18:44:20
>> Subject: Re: [vtkusers] connecting points in from vtkPoints
>> To: Rakesh Patil
>>
>> Use vtkStripper to order the line segments output from vtkContourFilter.
>>
>> On Fri, Jan 29, 2010 at 5:30 AM, Rakesh Patil wrote:
>>> Hello,
>>>
>>> I have a scatter data, (xyz file), where x and y are long, and lat resp
>>> and
>>> z is depth. I need to extract a zero contour from this xyz data. I use
>>> vtkContourFilter to extract the points for zero contour.
>>>
>>> I get the points what i require correctly.. But if i connect them
>>> serially,
>>> it shows that points are connected in a zig-zag form. I get points
>>> directly
>>> from contuorfilter. i.e.
>>>
>>> vtkPoints *pts = contFilter->GetOutput()->GetPoints();
>>>
>>> What and how do i do, so that when i connect the points, i get a decent
>>> connected line, instead of zig zag ..?
>>>
>>> Thanks
>>>
>>> Regards
>>>
>>>
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>
> Try updating the stripper:
>
> vtkSmartPointer<vtkStripper> stripper =
>  vtkSmartPointer<vtkStripper>::New();
> stripper->SetInputConnection( contFilter->GetOutputPort());
> stripper->Update();
> vtkPoints *pt = stripper->GetPoints();
>
> Does that change anything?
>
> Dave
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