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

[Berk Geveci]

Hi Stefan,

Try this:

- load dataset
- apply probe location
- create spreadsheet
- go to settings and turn on 'Auto Apply'
- change the probe location using 'p'

Does that work? What is the performance like?

-berk

On Fri, Mar 20, 2009 at 2:00 AM, Stefan Melber <Stefan.Melber at dlr.de> wrote:
> 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
>>>>
>>>>
>>>>
>>>
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>>
>>
>>
>
>