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Author Topic: centroid inaccuracy  (Read 1347 times)

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ribarm

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  • Marko Ribar, architect
centroid inaccuracy
« on: April 07, 2018, 07:46:28 AM »
I know that perhaps no one can answer this question, but just curious...

Which centroid point is more accurate?

Look in DWG to see the problem...
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Marko Ribar, d.i.a. (graduated engineer of architecture)

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gile

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  • Marseille, France
Re: centroid inaccuracy
« Reply #1 on: April 07, 2018, 08:37:13 AM »
Hi,

If you extrude the spline and get the centroid of the newly created 3d solid, the projection of this centroid on the XY plane is quite on the point got with gcen osnap (1e-14 tolerance).
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ribarm

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  • Marko Ribar, architect
Re: centroid inaccuracy
« Reply #2 on: April 07, 2018, 09:23:33 AM »
You are right, but on AutoCAD 2017 where gcen exist... On A2014, projection of centroid don't match to either point... This is what I get on A2014... (attachment)
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Marko Ribar, d.i.a. (graduated engineer of architecture)

:)

M.R. on Youtube

gile

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  • Marseille, France
Re: centroid inaccuracy
« Reply #3 on: April 07, 2018, 10:02:50 AM »
Autodesk should have change the way they compute a (extruded or not) Spline centroid when they added the gcen osnap with 2016 version.
Anyway, a spline is an approximated curve which necessarily alters the accuracy of the calculations.
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