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 2004 Route des Lucioles, BP93 F-06902 Sophia-Antipolis Cedex, France +33 4 92 38 76 64 +33 6 78 35 16 90 http://www-sop.inria.fr/asclepios/ -------------------------------