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Draw Arc by Length
Tip# 4246 By Kent Cooper On 25-Jan-2014
Rated By 0 users Downloaded : 894
Categories : Curved Objects
Software type : AutoCAD 2014
Rename File To : ArcLength.lsp
You do not need to know the center point to draw arcs.

Kent Cooper brings us a routine to draw an arc based on the arc length. Start by loading the LISP file, then type in the command ARCL.

Kent has noted that a couple of similar routines exist among the Cadalyst CAD Tips (Nos. 4218 and 3392), but this submission is different in a few ways. By default, this routine will always start at the last point, and the user will then provide the radius, length, and direction. You do not need to know the center point, and the last point is used as the starting point for the next arc if you are drawing multiple arcs.


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User comments
Comment by Cooper,Kent
Posted on 2014-01-31 12:41:30
Just to clarify: the word "direction" has two meanings in the routine. It asks for the direction that the Arc starts in, defaulting to a tangent continuation of the ending direction of the last directional thing drawn. AND it asks for the direction that the Arc curves, i.e. Leftward or Rightward from the point of view of the starting point and direction.