[vtkusers] how to modify vtkActor2D opacity?

[Sebastien]

Alright I found out!

Here is the thing, I forgot to say that was using a vtkLabelPlacementMapper
for my labels working with a vtkPointSetToLabelHierarchy, well, by acting on
that last object the opacity of labels is taken into account:
this->pSetToLabelHier->GetTextProperty()->SetOpacity( opacity );

I kept the post, it might help someone in the future....

Sebastien.



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