[Paraview] Selection of Multiple distinct cells/points

[Christian Werner]

Thanks for the info! However I am sorry to tell you that this selection 
query does not do its job. When I choose to select points with Region ID 
6,23 then it selects all points with region ID 0. It works if I say 6 
and 23 seperately (one at a time), but this way I cannot select both 
simultaneously. Also, the selection in general behaves strange. It seems 
to have a few glitches, I could reproduce this:

1) Have your objects in a 3D view and don't select anything. Then split 
your view and start a spreadsheet view. Select points in your 3D and 
switch back to spreadsheet view. Selection is gone.
2) In the 3D view and select some points. Open up a spreadsheet view. 
Switch between those two Views. Selection is gone.
3) When switching and selecting new points, then the spreadsheet does 
not always show the newly selected points. If it does, then some 
previously shown points are not listed anymore. In particular it listed 
only those points up to ID X where X is the RegionID of the newly 
selected points. I have to switch between "show all" and "show selected" 
to make the spreadsheet list all points again.

This is for a very recent (maybe two days old) cvs version.


Best regards,
Chrisian



Eric E. Monson wrote:
> Hey Christian,
>
> There is also the new Find Data functionality in ParaView CVS that Utkarsh informed us about recently:
>
> http://www.paraview.org/Wiki/Find_Data_using_Queries
>
> One of the choices there is "is one of", which takes a comma-separated list of attributes. So if you know the Region ID of the pieces you want, you can just list them there and "Run Selection" to grab them. It's maybe not as nice as just clicking, but it might do the trick.
>
> Talk to you later,
> -Eric
>
> ------------------------------------------------------
> Eric E Monson
> Duke Visualization Technology Group
>
>
> On Mar 28, 2010, at 7:12 AM, Christian Werner wrote:
>
>   
>> I just found out that the desired functionality IS there (multiselect with Ctrl). It just doesn't work with the frustum selection. Maybe this could be accomplished, too? Anyway I am fine for the moment.
>>
>> Put together there remains this wishlist:   Selection of cells by connectivity (select all cells with same RegionID with one click)
>>                                                            Multiselect with Frustum
>>                                                            Multiselect with new RegionID Selection feature ... :)
>>
>> Best regards,
>> Christian
>>
>>
>> Christian Werner wrote:
>>     
>>> 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
>>>>         
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