CAD Forum - tips, tricks, discussion and utilities for AutoCAD, Inventor, Revit and other Autodesk products [www.cadforum.cz]
CZ | EN | DE
Login or
registration
  Visitors: 6977

CAD tip CAD tip # 11025:

   
Question CAD 
 %  platform  category 
Q - question

How to create an axis of two curves? (average curve)

A - answer To create an axis geometry in a middle of two general curves (lines, polylines, splines) - e.g. a river axis, minor contour etc. - you can use the free LISP utility CurveAxis.

Download the VLX file from Download, load it into AutoCAD with APPLOAD and type the command CURVEAXIS. Select both border curves and specify the requested precision (number of axis segments). You can create the centerline axis as a polyline, a 3D polyline or a spline. The resulting polyline can be then simplified e.g. with PLdiet.

You can also try the CURVEAXISRB command which utilizes the "rolling ball" algorithm.

For both algorithms, you can also set a non-symmetrical axis, i.e. divide the curves e.g. to 1/4 (enter 4.0) or 3/4 (enter 4/3, 1.3333).

ACAD
100% *  CAD 
29.7.2016    18134×  
Prices - CAD eShop:
applies to: AutoCAD ·

See also:
Tip 14039:How to display the total volume or surface of 3D solids in DWG?
Tip 12766:Lines with a single grip, incorrect osnaps, intersections, offsets, hatches - CheckLarge
Tip 11989:How to dimension an ellipse in AutoCAD?
Tip 11522:How to create 3D splines in Fusion 360 - e.g. for pipe axes?
Tip 9829:DrGrid - parametric grid for AutoCAD drawings.


Back   All CAD Tips



Have we helped you? If you want to support the CAD Forum web service, consider buying one of our CAD applications, or our custom software development offerings, or donating via PayPal (see above). You may also add a link to your web - like this "fan" link: CAD Forum - tips, utilities, blocks for Autodesk products
CAD:    OS:    Categ: 
Text:  FAQ glossary   



Featuring:
Extend your AutoCAD LT productivity with our popular add-on
CADstudio LT Extension More info


Please use these tips at your own risk.
Arkance Systems is not responsible for possible problems that may occur as a result of using any of these tips.
TOPlist