[vtkusers] How to reverse the colours to display contours.?

[Joseph Melnyk]

> From: rakesh patil [mailto:prakeshofficial at gmail.com] 
> Subject: Re: [vtkusers] How to reverse the colours to display contours.?
>
> Yes Joseph. I also personally feel there should be some efficient way to implement this. 
> Anyhow, everytime, looping will make app run slower (in worst case where number of colours are more) 

Agreed.  It certainly depends on your application.  In my case, I only needed to do it once when the application began.  So it wasn't a tremendous issue.

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