[vtkusers] Threshold in a volume

[Iliana García Resines]

Hello,
Thanks for the information, it actually works, but with one little problem related to the Lookup Table. 
I have defined it by setting a blue to red Hue Range, being 0 blue and 100 red. When I change the range values on the mapper, I get to hide the values below my minimum number, but the new range re-scales the lookup table, being the new minimum colored with blue (i.e., the minimum) and not with its previous color.
How can I avoid this rescaling?
Thanks again
Date: Wed, 14 Jul 2010 11:08:31 +0100
Subject: Re: [vtkusers] Threshold in a volume
From: jothybasu at gmail.com
To: iliana_lancing at hotmail.com
CC: vtkusers at vtk.org

Try vtkPolyDataMapper()->SetScalarRange(yourMin,YourMax).


Jothy

On Wed, Jul 14, 2010 at 11:05 AM, Iliana García Resines <iliana_lancing at hotmail.com> wrote:






Hello,
I would like to know which is the best way of doing the following thing: I have a colored volume, with its values going from 0 to 100. I would like to  given a float parameter, hide all the points with value below this parameter, and keep showing the rest of the points. I guess there is some way in VTK to do this, but I wonder if it is a vtk procedure itself, or maybe some flag in the mapper I am using.

Does someone knows how to perform this? I am using a vtkPolyDataMapper, which makes use of an own-defined Lookup Table.
Thanks in advance
 		 	   		  

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