[vtkusers] Merging adjacent cubes

[Amy Squillacote]

The real name of the filter is vtkThreshold. It's in the vtkGraphics 
library. The on-line documentation for vtkThreshold is here: 
http://www.vtk.org/doc/nightly/html/classvtkThreshold.html.

- Amy

Kent Eschenberg wrote:
> You probably have some variable that indicates whether you want to 
> display the box. Lets call it x where 1/0 means show/don't show. There 
> is a filter called "Threshold" in ParaView (don't know its real name) 
> that can select cells based on some variable. Use it with a threshold 
> of x >= 0.5. Then use vtkDataSetSurfaceFilter to show the outer 
> surface of threshold's output. It will draw only the "outer surface" 
> and so avoid interior boundaries.
>
> Kent
> Pittsburgh Supercomputer Center
>
> Freyr Magnússon wrote:
>> Hi,
>>
>> I have a project where I'm visualizing occupied areas in a 3d grid.  
>> Currently I'm rendering a box for each cell occupied for lack of 
>> better ideas.
>>
>> The question are:
>>
>> is there a better known way to render the grid?
>>
>> if not is there a way to merge adjacent cubes to form a single shape 
>> and remove the unnecessary internal geometry that will never be 
>> rendered anyway?
>>
>>
>> regards,
>> Freyr
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-- 
Amy Squillacote                    Phone: (256) 726-4839
Computer Scientist                 Fax: (256) 726-4806
CFD Research Corporation           Web: http://www.cfdrc.com
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Huntsville, AL  35805