CAD tip # 11769:

Question CAD
% platform category

How to convert border lines (rails) to a surface?

You got a pair of border curves (polyline, spline) defining a shape in 2D or 3D space - e.g. rails, sheetmetal band, paper strip, ribbon - and you want to convert them to a surface in 2D or 3D.

To convert a pair of border lines (approximately parallel) to a surface, you can use two methods:

1. The command RULESURF (ruled surface) - select the first and the second border line, AutoCAD creates a Mesh-type object. Round segments are approximated only.

2. The command SURFPATCH - first you will need to close both curves by drawing and JOINing the end segments. The resulting closed curve can be then used in SurfPatch in the Curve option (not Edge). AutoCAD creates a Surface object, including round segments.

See also Tip 9097

ACAD

* CAD

23.1.2018 7453×

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applies to: AutoCAD ·

See also:
Tip 14053:	Why doesn't my export from Civil 3D to IFC 4.3 export surfaces and solids?
Tip 14027:	3D heart from the heart.
Tip 13805:	Projecting/embossing a profile on a curved surface in Fusion 360.
Tip 13040:	iLogic - display information about complexity of an Inventor part.
Tip 13006:	Calculated property descriptions (tobogan slide from floor to floor)

Selected tip: Attach/insert raster images even in AutoCAD LT (hidden trick).

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