[Paraview] Selection of Multiple distinct cells/points

[Christian Werner]

Hi David,

thanks for your suggestion. The Threshold may help in the occluding 
scenario, but I am mainly looking for a way to extract several objects 
which might have completely different IDs, e.g. 2,10 and 137. Multiple 
selection would help here very much! For what I am doing it would 
perfectly suffice if I could just select one point per object on 
mulitple objects and only extract those points. Somehow I have the 
feeling that this was possible in 3.6. I will try that.

Best regards,
Christian


David Doria wrote:
> On Sat, Mar 27, 2010 at 7:23 PM, Christian Werner 
> <christian.werner at rwth-aachen.de 
> <mailto:christian.werner at rwth-aachen.de>> wrote:
>
>     Hello!
>
>     I like the selection/spreadsheet combination. It helps you analyse
>     your data alot. However in my case, I'd like to select several
>     distinct cells in the 3D view by pressing the CTRL key, like in
>     the spreadsheet view. This would save me a lot of time since I
>     have to manually cut out (or extract the invers of) several
>     unwanted objects out of my data.
>
>     Also, I would like to know if there is a way to select all cells
>     belonging to one object (by connectivity). This would help in
>     situations where different objects occlude each other. I have
>     attached an image that explains the situation. In this case it is
>     difficult to select the red object - parts of the green object
>     which lies behind the red one are selected, too. I have data that
>     will yield a lot more different objects. This will make the
>     selection pretty hard.
>     Multiple selection would already help here, in that I could
>     subsequently mark an object's cells from different viewpoints
>     until I have captured it completely.
>
>     The data is the result a Contour filter with a Connectivity filter
>     applied afterwards.
>
>     Best regards,
>     Christian
>
>  
> The ctrl+click selection would also help my group quite a bit. We 
> typically export and use Blender for these operations - it would be 
> nice to stay in Paraview.
>
>
> Christian,
> The Connectivity filter produces a "RegionId" array. You could use a 
> Threshold filter on the RegionId to select the object you want. It 
> would be nice if this could be wrapped into the "select connected 
> object" filter that you are talking about.
>
> Thanks,
>
> David