Strange volume calculation


#1

Hi,

I am trying to calculate a volume of a solid, but it gives very strange results. The size of the shape is approximately 0.1x0.3x14 m with a rough volume estimate of 0.4 m^3. Rhino however calculates:
Calculating volume… Press Esc to cancel
Volume = 340.17 (+/- 0.021) cubic meters

Can anyone provide some clues what is going wrong here?

Kind regards, Sander
Version 5 SR14 64-bit
(5.14.522.8390, 5/22/2017)

Error_volume_calculation.3dm (467.2 KB)


(Pascal Golay) #2

Hi Sander - I see that V5 gets it wrong - V6 seems to get the right number, and if you Mesh the object in V5, the mesh volume is correct as far as I can see.

-Pascal


#3

I need the volume in V5 so V6 is not really an option.
Meshing the object does not make a difference on my machine.

Sander


(Pascal Golay) #4

Here, Volume on the mesh, in V5, gets me .44644712 cu. mm. The exact number will depend on the mesh settings but should be in that neighborhood; the polysurface tells me its volume is 340.17 cu. mm. (the file is in mm)

-Pascal