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Close Arcs and Segments
Tip# 4013 By Kent Cooper On 18-Nov-2012
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 Rated By 0 users Downloaded : 245
Categories : 2D Editing, Curved Objects
Software type : AutoCAD 2013
Rename File To : ArcClose.lsp
Close an arc, an arc segment of a polyline, or elliptical arcs.

Kent Cooper is back again with a nice routine to close circular objects in AutoCAD. This routine will allow you to close an arc, an arc segment of a polyline, or elliptical arcs, whether they are constructed that way or created by breaking an ellipse. To get started, load the LISP file and type in the command shortcut AC. Select any one of the entities mentioned above, and it will be "closed." Arcs and polyline arc segments will be converted to circles; elliptical arcs will be converted to a closed ellipse. The properties of the original object are maintained and this routine can be used in noun-verb or verb-noun selection mode. See the top of the LISP file for additional comments and any limitations.
 

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Comment by Cooper,Kent
Posted on 2012-11-19 09:24:59
Just to clarify two things: 1. It will close into a Circle not just ANY Polyline arc segment, but only a Polyline that consists of nothing but a single arc segment, and is therefore geometrically equivalent to an Arc. 2. In the case of an Elliptical arc with a minor-to-major axis ratio of 1 (also geometrically equivalent to an Arc), it will close that into a Circle, rather than a closed Ellipse. [If you Explode a Block with equal X & Y scale factors but a Z scale factor NOT equal to its X & Y, any Arc(s) in it become axis-ratio-1 partial Ellipses.]