[vtkusers] Rendering more than one actor problem

[ZACK]

Hi to All, 

 Finally :), I was able to plot more than one actor by duplicating my 
vtkAppendFilter (list of unstructured grids).  I old vtk 5.4 I was able to 
use the same vtkappendFilter to create different actors output (like 
wireframe actor + Gray model-actor, mesh actor. 

In Vtk 8.1.0  I had to create a new vtkappendFilter (List of new 
vtkunstructuredGrid) to be able to render my previous plots. Why is that? 
will it slow vtk rendering? or is there a workaround for this? 

By the way, I tried to create new vtkappendFilter (copy from original 
Filter) but it did not work, I had to create new vtkunstructuredGrid too!! 

Thanks for all 

Regards 



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