[Paraview] Returning a point cloud

[Burlen Loring]

Hi Federico,

You have to create some vertex cells. So use a polydata or unstructured 
grid instead of pointset. Polydata is the easier you'd make a cell array 
like this: 1 0 1 1 1 2 ... 1 n where n is the number of points, and add 
this with SetVerts method. You won't have to use the Delaunay filter to 
see this.

Burlen

On 08/18/2011 09:54 AM, Federico Milano wrote:
> Hi. I want to show a colored point cloud (vtkPointSet) returning from 
> a custom filter. In my custom filter, I prepare the pointCloud in this 
> way:
>
> vtkSmartPointer<vtkPointSet> pointCloud = 
> vtkSmartPointer<vtkPolyData>::New();
>    pointCloud->SetPoints(points);
>    pointCloud->GetPointData()->SetScalars(distances);
>    pointCloud->Update();
>
> output->DeepCopy(pointCloud);
>
> points is a vtkPoints and distances is a vtkDoubleArray.
>
> The problem is that nothing is showing. If instead of using a 
> vtkPointSet I use a vtkPolyData and filter it with a vtkDelaunay2D, it 
> shows some points, but other points are left out (Do you know why is 
> this happening?). If I use a vtkDelaunay3D, again, I see nothing.
>
> Do you know why is this happening? What do you recommend to build 
> point clouds?
>
> I would really appreciate any suggestion.
>
> Thanks in advance,
>
> Federico
>
>
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