Sweep2

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Sweep 2 Rails

 History enabled

 Crease splitting enabled

The Sweep2 command fits a surface through a series of profile curves that define the surface shape and two curves that define the surface edges.

Steps

  1. Select two curves as the rails.
  2. Select cross-section curves in the order in which the surface will pass through them.
    Select open curves near the same ends. For closed curves, adjust the curve seams.

Tips

Command-line options

ChainEdges
(rails only)

Select connected edges based on the curve continuity of the connection between segments.

How to chain select edges.

Point
(cross‑sections only)

Creates a surface that begins or ends at a point. Use this option only at the start or end of the curve series.

To drag seams (closed cross-section curves only)

  1. Select a seam point marker, and move it along the closed curve.
  2. Continue to adjust the seam points until they line with each other and the closed curves all have the same direction, and then press Enter.

Adjust seam options

Flip

Reverses the curve direction.

Automatic

Attempts to align the seam points and directions without intervention.

Natural

Moves the seam points to the way they were at the beginning of the command.

Sweep 2 Rail Options dialog box

Curve options

Do not change cross sections

Creates the sweep without altering the cross-section curves.

Rebuild cross sections with ___ control points

Rebuilds the cross-section curve's control points before creating the sweep.

Refit cross sections within ___

Refits the cross-section curves before creating the sweep.

Preserve first cross section

When you are matching edge tangency or curvature, your surface may pull away from your cross-section curves. This option forces the surface to match the first cross-section curve.

Preserve last cross section

When you are matching edge tangency or curvature, your surface may pull away from your cross-section curves. This option forces the surface to match the last cross-section curve.

Maintain height

Removes the association between the height scaling from the width scaling. By default, cross-section curves normally scale in both the height and width dimensions.

On
Off
Refit rails

Refits the rail curves before creating the sweep.

Edge continuity

Continuity is only enabled if the rails are surface edges and the shape curves are non-rational, that is, all control-point weights are 1. Exact arcs and ellipse segments are rational.

Only continuity options that the curve structure (point count and rational/non rational) supports will be available.

Position / Tangency / Curvature

Sets the continuity for the edge match.

Closed sweep

The Closed sweep option creates a closed surface, continuing the surface past the last curve around to the first curve.

This option is only available after you select two cross-section curves.

Add Slash

Adds additional cross-section alignments to control how the surface is created between sections.

See also

Sweep1

Fit a surface through profile curves and one edge curve.

Loft

Fit a surface through profile curves that define the surface shape.

NetworkSrf

Fit a surface through a network of crossing curves.

Create surfaces

 

 

 

Rhinoceros 6 © 2010-2019 Robert McNeel & Associates. 18-Mar-2019