[Therion] Calculation of cave volume

[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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> >
> 
> 
>