Topic: converting splines into best fit lines and arcs to withing a certain tolerance?

[Bob Q]

I saw there was someone working on routine back in 2004, just wondering if there have been any nice routines created that will do a Spline to best fit lines and arcs?

I had one years ago in the era of 2000, but lost it! Ha!

[CAB]

Looking through my collections I have:

Code: [Select]

;;CADALYST 12/03 AutoLISP Solutions  SPLINE-TO-PLINE.LSP
;;(c) 2003 Tony Hotchkiss

(defun spline-to-pline (/ i)

Code: [Select]

;;;CADALYST 01/06  Tip 2082: Spline2Pline2.lsp     Spline to Polyline Conversion - Update     (c) 2006 Cadalyst and Lloyd Beachy + narrator
 
;; Spline2Pline2.lsp (c) 2005 Lloyd Beachy + narrator
;; Routine to convert splines to plines

(Defun C:S2P2 (/ ss pt# cmdecho osmode clayer count ent lay lng pt-list cnt)
7/29/2004

Code: [Select]

;|Try this snippet. What it does is step through the given spline at a given tolerance
distance and pull a point off of the curve. It then adds that point to a running list.
The snippet returns that list of points that you could then use to build your polyline.
|;

(vl-load-com)

(defun Spline->Pline

[GP]

Try FLATTEN (the best).

[Bob Q]

Any chance I could get a copy of those couple routines?
Thanks!

[Bob Q]

Try FLATTEN (the best).

I tried flatten, and the attached image shows what it does. It seems to convert everything into lines, making the radiuses really jaged.

[Lee Mac]

What about using PEDIT?

[Bob Q]

You get a similar situation, all lines, no best fit arcs.

[gile]

Hi

Look at the PLINECONVERTMODE sysvar.

[Bob Q]

Hi

Look at the PLINECONVERTMODE sysvar.

o.k. cool! I will check it out!
Thanks

[CAB]

Try FLATTEN (the best).

I tried flatten, and the attached image shows what it does. It seems to convert everything into lines, making the radiuses really jaged.

Wow that was drawn using a spline? 

[Bob Q]

It was a nice smooth spline, the result was after running flatten...