[vtkusers] Draw point-cloud

[Thomas Obenaus]

Thank you, it works fine!
Do you know if there is a possibility to adjust the size of the points like
using GL_POINT_SIZE in OpenGL?

Thanks,
Thomas.


SureshJ wrote:
> 
> 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.
>> --
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