AFAIK, this feature is built into R14.
First you must change your object into a region.
Type "region" at the command line then select the objects you want to
convert into a region.
Once you have done this, type "massprop" at the command line and then select
the region object you just created.
Bill Allen, S.E.
Laguna Niguel, CA
||From: Fountain Conner [mailto:fconner(--nospam--at)pcola.gulf.net]
||Sent: Thursday, February 10, 2000 10:45 AM
||Subject: Off topic, Moment of Inertia
||Does anyone have an ACAD Lisp routine that will reliably calculate the
||moment of inertia of a shape once it's drawn?
||I tried one, but it wasn't too accurate -- even on a simple rectanguar
||section. Build-up sections were worse.
||Fountain E. Conner, P.E.
||1724 Beaver Pond Rd.
||Gulf Breeze, Fl. 32561
|| Phone 850-932-5547
|| Fax 850-934-1916