[vtkusers] ICP with Point Cloud

[Tim Hutton]

Hi Sandra,

Try making a vtkPolyData, with a vertex for each point. This is easily
achieved using polydata->SetPoints(points) and a call to
polydata->InsertNextCell(VTK_VERTEX,1,&i) for each point index i. You
may need a polydata->Allocate() beforehand.

Tim

On 25/05/07, samo <sandra.moritz at gmx.de> wrote:
>
>
> Hello together
>
> I try to match a point cloud with a surface with the help of
> vtkIterativeClosestPointAlgorithm. What I would like to know is, whether and
> how I can use a point cloud in vtk. At the moment, I am using the vtkPoints
> array to store all the points in. But when I want to use the icp, I need a
> vtkDataSet. But, as I understood, the vtkDataSet always needs the cell
> information. Is that right? I tried to use vtkUnstructuredGrid with only
> setting points and no cells. But the icp calculated no transformation. Is
> there a possiblility to use the icp without the cell information? As, in my
> point cloud, I don't know how the points are organized. I just would like to
> calculate a transformation from the point cloud to the surface. The icp
> which I know from maths, is able to do that.
>
> Has anybody an idea?
> --
> View this message in context: http://www.nabble.com/ICP-with-Point-Cloud-tf3816487.html#a10804257
> Sent from the VTK - Users mailing list archive at Nabble.com.
>
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-- 
Tim Hutton - http://www.sq3.org.uk

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