approximating ellipse
sam...@bbs.cruzio.com
The following question is admitadly for a commercial application, but I would
appreciate a response anyway.
I have a program that works with autocad which I want to upgrade to handle
the ellipse entity defined in release 13. It seems the logical way
to do this would be to treat the ellipse as a series of arcs (polylines with
bulge) as was done in previous versions. However I don't have the
formulas to convert an ellipse to a series of arcs. I thought about
setting PELLIPSE to 1 and redrawing the ellipse as a polyline, but the
manual says this won't be supported in r14 so why bother. Using DXFIX is not
an option.
Thanks for any help or references.
Samuel Eisenpress
Bill Gilliss
sam...@bbs.cruzio.com wrote:
>
>... However I don't have the
> formulas to convert an ellipse to a series of arcs. I thought about
> setting PELLIPSE to 1 and redrawing the ellipse as a polyline, but the
> manual says this won't be supported in r14 so why bother. Using DXFIX is not
> an option.
Samuel - Try any standard *manual* drafting manual. There are usually
two or three procedures given for approximating ellipses with arcs.
Bear in mind that they will only be approximations, and won't return
the same perimeter and area figures as an ellipse with the same nominal
axis endpoints.
--
-Bill Gilliss gil...@iglou.com 72320...@compuserve.com
Theo L.A. Groenenberg
sam...@bbs.cruzio.com wrote:
>
> The following question is admitadly for a commercial application, but I would
> appreciate a response anyway.
>
> I have a program that works with autocad which I want to upgrade to handle
> the ellipse entity defined in release 13. It seems the logical way
>
> Samuel Eisenpress
Have you tried exporting the file as a Release 12 DWG and than opening
it again?
Good luck.
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