[vtkusers] switchOff lights in a vtkRenderer

[Hua Qian]

>Francis Bouchet wrote:
 
> I try to have my vtkRenderer looking as empty while I modify its content :
> 1. I tried to Remove my actors but when I add new ones, the zoom is so high
> that the Renderer concentrates on
> the origin of the scene.

Reset the Camera will reset the zoom, e.g.
renderer.ResetCamera()

> 2. I tried to switch off the light, but I do not succeed in getting the
> Renderer lights pointer.

If you just want actor invisible, set the opacity to 0 will do it, e.g.
actor.GetProperty().SetOpacity(0)

Hua
-- 
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Hua Qian, Ph.D.                          Programmer-Analyst          
Imaging Research Laboratories            voice: (519) 663-5777x34066 
The John P. Robarts Research Institute   email: hqian at irus.rri.on.ca