LOFT Command

LOFT Command

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

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 cross sections can be open or closed, planar or non-planar, and can also be edge sub-objects. Open cross sections create surfaces and closed cross sections create solids or surfaces, depending on the specified mode. 

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 sub-objects 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
2D polylines can be used as guides if they contain only 1 segment.
Edge Sub-Objects
Edge Sub-Objects
Edge Sub-Objects
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



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
Specifies first or last point of the lofting operation. If you start with the Point option, you must next select a closed curve. 
Join Multiple Edges
Handles multiple, end-to-end edges as one cross section. 
Mode
Controls whether the lofted object is a solid or a surface. 
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. 

  1. Intersects each cross section
  2. Starts on the first cross section 
  3. 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. 

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