[Therion] the volume of a cave

[Xavier Pennec]

Dear Marco,

Could you expand on how you computed the volume from the dxf file?
I would be very interested to perform that for (no so small) mines!

Thanks

Xavier


Le 27/02/2013 11:37, Marco Corvi a écrit :
> hi,
>
> it just happened that i was asked to estimate the volume of a "cave"
> (actually a small mine).
>
> therion dxf export is a triangulated surface of the cave wall.
> if the surface were oriented
> it would be extremely easy to compute the volume.
> (the surface of a real cave is always orientable: no klein cave).
>
> all recent versions of therion produce nice-looking dxf.
> i tried 5.3.5 and the volume seemed reasonable.
> then i tried 5.3.11 and i got an unreasonable value (there is also
> a commented option for new 3d, and the result was even more unreasonable).
>
> so i checked the dxf files.
> it seems that none of them is oriented.
> is it possible to make therion produce an oriented surface?
> thanks.
>
> marco
>
>
>
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> -------------------------
> Xavier Pennec
> Senior Research Scientist / Directeur de recherche
> Asclepios project-team, INRIA Sophia-Antipolis
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