[vtkusers] vtkActor rendering time

[David Doria]

On Fri, Dec 18, 2009 at 4:25 AM, Broggi, Pomme
<pomme.broggi at capgemini.com>wrote:

>  Hello,
>
> I have created my own octree, if I show my ground using one actor,
> between starting of rendering loop and first render  of my ground actor, 10
> s are needed. If I use   16 actors to display the same ground (128/128), and
> I show all parts at the same time, 60 s are needed.
> What happens, why the first render is so slow, why is it so more slow to
> display 16 smalls actors than 1 big actor?
>
> Objects used to create vtk actors are :
>
> vtkPoints * pPoints = vtkPoints::New(); //Liste des points du maillage
>
> vtkPolyData * pPolyData = vtkPolyData::New(); // Objet comprenant les
> points, les cellules, et les donnees (valeurs profondeur) de notre maillage
>
> vtkPolyDataMapper * pMapper= vtkPolyDataMapper::New( );
>
> vtkCellArray * pCells = vtkCellArray::New(); //Liste des cellules qui vont
> constituer notre maillage
>
> vtkFloatArray * pScalars = vtkFloatArray::New(); // Liste des valeurs de la
> profondeurs (sert pour la color map)
>
>
>
> Thanks for your answer.
>
> Pômme
>
>
All you have shown there is instantiating some objects. Can you make the
smallest possible compilable example of your issue and send it to us?

Thanks,

David
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