[Paraview] "Select Points on" and nearest point ...

[Stefan Melber]

Hi David,

tried this way: theoretically it works, but its a bit laborious:

-) Activate the filter
-) "p" + mouse
-) Apply
-) Spreadsheet + select source

And: i found no possibility to select a new point with the current 
filter - so i have to start a new one. Further on, i clicking apply i 
have an update of "PointerPolyDataMapper", which takes a (short) time.

So overall, it would be nice if i can use it that way:

-) Activate new Probe-Filter + Spreadsheet
-) "p" + Mouse - every time clicking, automatic update of the spreadsheet

Best regards,

     Stefan
> Select points find vertices, select cells find cells, I believe you
> are trying to find data at a specific location within a cell, which is
> not necessarily on a vertex.
>
> Try the probe location filter. Activate it, then press p with the
> mouse on the point you are interested in, then click accept. This
> filter does not need additional render passes like selection does, so
> it should be fast.
>
> If you need to process the data you've identified further, you can
> manually make a location type selection out of the selected coordinate
> (there may be automatic ways to convert that I am not aware of) in the
> selection view.
>
> On Thu, Mar 19, 2009 at 1:46 AM, Stefan Melber <Stefan.Melber at dlr.de> wrote:
>   
>> Hi Berk,
>>     
>>>> using the button "select points on" i can drag up a rectangle to select
>>>> some. But sometimes it would be nice by clicking on e.g. a surface to
>>>> find
>>>> the nearest point around - in fieldview for example i have to press to
>>>> cntl-key to do this.
>>>>
>>>>         
>>> Using the point selection mode, you should be able to click to select
>>> 1 point. Doesn't this work?
>>>
>>>       
>> This works if the point is nearby. If i click e.g. in the middle of a
>> triangle of medium size (unstructured mesh) it does not select a point. The
>> problem is: exploring a solution i am not interested in the points but in
>> the flow field and so normally i do not show the points but a e.g. a cut
>> with a scalar. There i would like to get information about this scalar ...
>>
>>     
>>>> And: every time selection points the update of the graphic window takes
>>>> some
>>>> time. Is there a speed up?
>>>>
>>>>         
>>> How slow? How big is the geometry that is being rendered?
>>>
>>>       
>> The case has about 20e6 points and there is only a cut visible. Rendering
>> the clicked point it takes about 5 secs ...
>>
>> Regards,
>>
>>   Stefan
>>     
>>> -berk
>>>
>>>
>>>       
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the ParaView Wiki at:
>> http://paraview.org/Wiki/ParaView
>>
>> Follow this link to subscribe/unsubscribe:
>> http://www.paraview.org/mailman/listinfo/paraview
>>
>>     
>
>
>
>