[Therion] Calculation of cave volume

[Benedikt Hallinger]

I'm not sure, but I somehow remember something about some script that 
did the caluclation.
Never run it so far, however.
And I don't remember the name.

Would be cool if such a function would be integrated in therion itself 
and printed to the log...
(maybe do both: just use LRUD data and another run by using the volumes 
calculated from the lox compiler)


Am 2022-01-27 15:21, schrieb Bill Gee:
> Hi Enrico -
> 
> Just to see what this method would produce, I installed both Paraview
> and MeshLab on my Fedora 35 system.  I opened a .lox file of the cave
> in Loch (which displays a 3d rendering of the cave) and then exported
> it to a .vtk file.  I opened the .vtk file in Paraview.  It shows
> nothing.  I cannot find the export function.  The Save data feature
> does not offer x3d as a file type.
> 
> In Paraview the Information tab says there are zero cells, zero points
> and zero memory used.  The x-, y- and z-range are "not available".
> 
> The .vtk file exists and is about 16k bytes (it is a small cave).
> 
> Am I missing something?
> 
> ========
> Bill Gee
> 
> 
> On Thursday, January 27, 2022 7:52:57 AM CST Enrico Fratnik wrote:
>> Hi Bill,
>> 
>>    normally I export the VTK model of the cave from LOCH then I open 
>> it
>> with ParaView
>> With ParaView I export the model in x3d format and I open it with 
>> MeshLab
>> where I use the filter "Surface Reconstruction: Screened Poisson" with
>> pre-clean option active
>> After that with the filter "Compute Geometric Measures" you can 
>> retrieve
>> the volume on the log view.
>> 
>> My big issue is which model is better to export with therion in order 
>> to
>> obtain an acceptable volume: the one with "-wall-source splays" or 
>> with
>> "-wall-source maps"?
>> 
>> Hope this helps
>> 
>> good caves to everyone
>> 
>> enrico
>> 
>> On Thu, Jan 27, 2022 at 1:37 PM Bill Gee <bgee at campercaver.net> wrote:
>> 
>> > Hello everyone -
>> >
>> > Several years ago I made a map of a small cave.  Among the data that was
>> > calculated was an estimation of the volume of the cave.  I need to find
>> > that information again, but it has so far eluded me.  I thought it was in
>> > therion.log along with other statistics like length and bounding box
>> > dimensions, but now I do not find it there.  The estimation was based on
>> > solids calculated from centerline and LRUD data.
>> >
>> > I looked in thTMPDIR and found nothing useful.  I also checked to see if
>> > it comes from Aven or Loch.  Nothing there.  I looked through a KML file
>> > and found nothing.
>> >
>> > Can any of you point me in the right direction?  Believe it or not, I need
>> > to testify in court early next week about this.  It's a long story ...
>> >
>> > Thanks!
>> > ========
>> > Bill Gee
>> >
>> >
>> >
>> >
>> > _______________________________________________
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>> > Therion at speleo.sk
>> > https://mailman.speleo.sk/listinfo/therion
>> >
>> 
>> 
>> 
> 
> 
> 
> 
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