[vtkusers] Updating actor colors without manual call to Render()

[Dave Edmunds]

Hi all,

Currently I have a long list of actors, and I periodically update the color
of a particular actor using

double rgb[3] = ...
actors[i]->GetProperty()->SetColor(rgb)

The only way I have found so far to actually display this new color in the
render window is to manually call

renderWindow->Render()

after each color change. However, this redraws the entire scene, not just
the actor I am updating, and causes my app to become quite sluggish since
the colors can be changed interactively by the user at a fast pace. 

Is there a better/more efficient way to do this?

Kind regards,

Dave 



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