Getting the centroid of closed polyline

[David.Hoole]

Hi csgoh

Sorry, but I can't think of a solution other than Kennet's.

I don't know what these polylines represent or how they are being produced, but it seems to me that such a small dimension suggests a slight misalignment in the drawing rather than a real area/object. Please don't take this as a criticism, just trying to look at the problem practically.

[csgohjmj]

Hi David;
The issue here is not how the polylines are created or what it is for. The issue here is why it gives different results in acad14 & 2002 but not acad2004 & 2005 even it is the same polyline.

csgoh

[kennet.sjoberg]

Once again, "Probably AutoCAD do better calculating nowadays ; )"

to scale objects up and down is one solution for you, sometimes it is enough to move the objects closer to 0,0,0 especially when you are working in 3D with solids.
the phenomenon can appear when you create hath in R14 or R2002, and there do R2002 better calculation.

:. small and large numbers make the sense and miscalculation, the thing you can do is to avoid them.

Happy Computing !

kennet

[csgohjmj]

Kennet,
Thanks for your explanation and I will take heed of your advice in the future.

csgoh

[kennet.sjoberg]

OK csgoh glad if I can help, hope you enjoy the R14 centroid stuff.

: ) Happy Computing !

kennet


By the way the uploaded region is a typical example that will cause trouble to AutoCAD,
the best thing there is to avoid the unnecessary peripheral node from the beginning.