ExtrudeCrvAlongCrv

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Results affected by crease splitting setting Crease splitting enabled.

The ExtrudeCrvAlongCrv command creates a surface by tracing the path of a curve along another path curve.

Steps

Select a curve.

Select the path curve.

Notes

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If the curve is not planar, then it will be extruded in the z-direction of the active viewport's construction plane. If the curve is planar, it will be extruded in the normal direction of the plane of the curve.

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Unlike Lofts and Sweeps, the initial orientation of the profile curve or surface is maintained through the extrusion.

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If the input is a non-planar polycurve or a planar polycurve where the extrusion direction is not normal to the curve plane, the result will be a polysurface rather than an extrusion object.

Command-line options

Solid

If the profile curve is closed and planar, both ends of the extruded object are filled with planar surfaces and joined to make a closed polysurface.

DeleteInput

Yes

Deletes the original geometry.

Retains the original geometry.

SubCurve

The SubCurve option extrudes a curve the distance specified by picking two points along a curve.

Note: The extruded surface starts from the beginning of the curve, not the first picked point. Picking the points only establishes the extrusion distance.

Subcurve steps

Select the path curve.

Pick a start along the path curve.

Pick an end along the path curve.

SplitAtTangents=Yes/No

The Yes option creates a single surface.

The No option creates a polysurface when the input curves are joined tangent curves. Faces in the resulting polysurface correspond to the tangent sub-curves in the input curves.

Original polycurve (left), SplitAtTangents=No (center), SplitAtTangents=Yes (right).

Notes

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When this option is used, the output will be a polysurface.

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When UseExtrusions is on, this setting has no effect.