[vtkusers] construct a vtkPolyLine/PolyGon from a set of vtkLines

[nsarrasin]

Hi David,

That's what I've tried but it seems quite long when I iterated threw all 
the lines.
Anyway I'll try again and try to optimize it.

Thanks a lot,

Le 03/01/2011 15:19, David Gobbi [via VTK] a écrit :
> On Mon, Jan 3, 2011 at 1:47 PM, nsarrasin <[hidden email] 
> </user/SendEmail.jtp?type=node&node=3325747&i=0>> wrote:
> >
> > First of all, Happy New Year to everyone !
> >
> > Now that's done, I describe my problem.
> >
> > Is there a way to construct a vtkPolyLine from a set of vtkLines ?
>
> Yes, the vtkStripper filter will do exactly that.
>
> But there is something else that you need to fix.  The Points in a
> vtkPolyData are not ordered according to connectivity.  What you have
> to do is get the cells from the data, since the PointIds in the cells
> _are_ ordered by connectivity:
>
> vtkCellArray *lines = data->GetLines();
> vtkPoints *points = data->GetPoints();
>
> Go through all the polylines in the cell array and use the point Ids
> to get the points.
>
>   David
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