[Therion] Calculation of cave volume

[Bill Gee]

Hi Enrico -

Thank you very much!  That helps.  There is one more step that I had to figure out - After importing the VTK file into Paraview, I had to click on Apply.

What are the units?  I think it is all in meters, but not sure.

========
Bill Gee


On Thursday, January 27, 2022 8:57:59 AM CST Enrico Fratnik wrote:
> Dear Bill,
> 
>    attached you can find the screenshots of the steps I have described.
> 
> Hope this can help you
> 
> enrico
> 
> On Thu, Jan 27, 2022 at 3:23 PM Bill Gee <bgee at campercaver.net> wrote:
> 
> > 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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> > > >
> > >
> > >
> > >
> >
> >
> >
> >
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> 
> 
>