LOFT
 
 
 
Quick Reference

Creates a 3D solid or surface in the space between several cross sections.

Access Methods

Button

 Ribbon: Home tabModeling panelLoftNot available on the ribbon in the current workspace.
 Menu: Draw  Modeling  LoftNot available in menus in the current workspace
 Toolbar: Modeling 

Summary

Creates a 3D solid or surface by specifying a series of cross sections. The cross sections define the shape of the resulting solid or surface. You must specify at least two cross sections.

Loft profiles can be open or closed, planar or non-planar, and can also be edge subobjects. Use the mode option to select whether to create a surface or a solid.

When creating surfaces, use SURFACEMODELINGMODE to control whether the surface is a NURBS surface or a procedural surface. Use SURFACEASSOCIATIVITY to control whether procedural surfaces are associative.

You can use the following objects and subobjects with LOFT:

Objects That Can Be Used as Cross Sections

Objects That Can Be Used as a Loft Path

Objects That Can Be Used as Guides

2D polyline

Spline

2D spline

2D solid    

2D spline

Helix

3D spline

Arc

Arc

Arc

Circle

Circle

2D polyline

Note2D polylines can be used as guides if they contain only 1 segment.
Edge sub-objects Edge subobjects Edge subobjects

Ellipse

Ellipse

3D polyline

Elliptical arc

Elliptical arc

Elliptical arc

Helix

2D polyline

 

Line

Line

Line

Planar or non-planar face of solid    

Planar or non-planar surface    

Points (first and last cross section only)

3D polyline

 

Region    

Trace    

To automatically delete the cross sections, guides, and paths, use DELOBJ. If surface associativity is on, DELOBJ is ignored and the originating geometry is not deleted.

List of Prompts

The following prompts are displayed.

Cross Sections in Lofting Order

Specifies open or closed curves in the order in which the surface or solid will pass through them.

Point

If you select the Point option, you must also select a closed curve.

Join Multiple Curves

Joins multiple, end-to-end curves as one cross section.

Mode

Controls whether the lofted object is a solid or a surface.

Options
Continuity

This option only displays if the LOFTNORMALS system variable is set to 1 (smooth fit). Specifies whether the continuity is G0, G1, or G2 where the surfaces meet.

Bulge Magnitude

This option only displays if the LOFTNORMALS system variable is set to 1 (smooth fit). Specifies a bulge magnitude value for objects that have a continuity of G1 or G2.

Guides

Specifies guide curves that control the shape of the lofted solid or surface. You can use guide curves to control how points are matched up on corresponding cross sections to prevent undesired results, such as wrinkles in the resulting solid or surface.

  • Intersects each cross section
  • Starts on the first cross section
  • Ends on the last cross section

Select any number of guide curves for the lofted surface or solid and press Enter.

Path

Specifies a single path for the lofted solid or surface.

The path curve must intersect all planes of the cross sections.

Cross Sections Only

Creates lofted objects without using guides or paths.

Settings

Displays the Loft Settings dialog box.