CAD tip # 6706:

Question

CAD

% platform category

What is the maximum number of vertices in AutoCAD polylines?

The number of polyline vertices (in a Polyline, LWpolyline, 3Dpolyline, Spline) is not limited in AutoCAD, you can use any practical number of polyline nodes (vertex). So you can create and edit curves with more than 100.000 vertices.

With such extremely large polylines, you have to count with slower response in some operations (e.g. displaying grips on grip-editing).

You can try yourself the following AutoLISP code:

(setq x 0 y 0)
(setvar "CMDECHO" 0)
(command "_PLINE")
(repeat 100001
 (command (list x y))
 (setq x (+ x 1.0) y (+ y 1.0))
)
(command "")
(setvar "CMDECHO" 1)
(vl-load-com)
(vlr-beep-reaction)

For comparison: the maximal number of polyline vertices is limited to 101 in the DGN V7 format, and to 5.000 points in the DGN V8 format.

ACAD2010ACAD2009ACLTADTMap

*CAD

27.5.2009 17748×

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this tip shared by ARKANCE experts applies to: AutoCAD 2010 · AutoCAD 2009 · AutoCAD LT · AutoCAD Architecture · AutoCAD Map 3D ·

See also:
Tip 14436:	Conversion of arc polylines to straight-segment polylines (e.g. for GIS).
Tip 14395:	CheckAngles - checking the allowed line angles in the DWG drawing (e.g. only ortho)
Tip 14242:	How to find the minimum, maximum or local extreme of a 2D or 3D curve?
Tip 14240:	How to simplify an uneven profile imported via DXF into Autodesk Fusion?
Tip 14183:	PLKangles - display/check kink angles in polylines.

Selected tip: Easter egg hidden in AutoCAD 2004 (and LT and Desktops).

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