# ExtrudeCrvTapered

Solid

Extrude Planar Curve >

Tapered

Surface

Extrude Curve >

Tapered

The ExtrudeCrvTapered command creates a surface by tracing the path of a curve in a straight line tapering in or out at a specified draft angle.

#### Steps

1. Select a curve.
2. Specify a distance.

#### Note

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

SetBasePoint

Specify a location that serves as the first point when picking two points that set the extrusion distance.

Direction

Two points establish the direction angle.

#### Direction steps

1. Pick a base point.
2. Pick a second point that establishes the direction angle.

DraftAngle

Specify the draft angle for the taper. The draft angle depends on the construction plane orientation. When the surface is vertical/perpendicular to the construction plane, the draft angle is zero. When the surface is parallel to the construction plane, the draft angle is 90 degrees.

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.

Corners

Specifies how corner continuity is handled.

##### Sharp

The corners of the tapered surfaces will extend to meet at sharp corners with position (G0) continuity.

##### Round

The corners of the tapered surfaces will be filled with filleted segments with tangent (G1) continuity.

##### Smooth

The corners of the tapered surfaces will be filled with blend segments with curvature (G2) continuity.

DeleteInput

##### Yes

Deletes the original geometry.

##### No

Retains the original geometry.

FlipAngle

Toggles the draft angle direction.

SplitAtTangents

##### Yes

Creates a single surface.

##### No

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).

#### Note

• When this option is used, the output will be a polysurface.
• When UseExtrusions is on, this setting has no effect.

Rhino for Mac © 2010-2017 Robert McNeel & Associates. 24-Oct-2017