[vtkusers] Draw point-cloud

[Suresh Joshi]

Hey Thomas, in the past I've done something like this and its worked out
quite nicely for making large point clouds:

    vtkPoints* pts = vtkPoints::New();
    vtkCellArray* conn = vtkCellArray::New();
    vtkPolyData* poly = vtkPolyData::New();

    for (int i = 0; i < ptrToData->GetNumberOfTuples(); i++)
        pts->InsertNextPoint(ptrToData->GetComponent(i, 0),
ptrToData->GetComponent(i, 1), ptrToData->GetComponent(i, 2));

    for (int i = 0; i < pts->GetNumberOfPoints(); i++)
          conn->InsertNextCell(1, &i);

    poly->SetPoints(pts);
    poly->SetVerts(conn);

    vtkPolyDataMapper* pmap = vtkPolyDataMapper::New();
    pmap->SetInput(poly);


Cheers,
-SJ



On Thu, Sep 3, 2009 at 9:14 AM, Thomas Obenaus <
thomaso at eas.iis.fraunhofer.de> wrote:

>
> Hello,
>
> I have to visualize a point-cloud whose number of points varies from 10 to
> 20000. At the Moment I use a sphere with low resolution for each point but
> the result is not satisfying (bad performance or ugly points). Is there a
> possibillity to draw points in VTK like using GL_POINTS in OpenGL?
>
> Thanks,
> Thomas.
> --
> View this message in context:
> http://www.nabble.com/Draw-point-cloud-tp25270914p25270914.html
> Sent from the VTK - Users mailing list archive at Nabble.com.
>
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