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Creating 3D Solids by Lofting Between 2D Entities

The Loft command lets you create a new solid object or surface by specifying a series of cross sections.

The cross section shapes – together with a path or multiple guides, if specified – define the profile of the resulting solid object or surface.

If the entities defining the cross sections are closed, the command creates a solid object; otherwise if the cross sections is open, it creates a surface.

To create a solid or surface by lofting existing entities:

  1. Click Solids > Draw > Loft (or type Loft).
  2. Specify shapes individually in lofting order and press Enter.

    You must specify at least two cross sections.

  3. Specify an option:
    • Cross-sections only: Use cross sections defined by arcs, lines, polylines, or polygons. If you specify closed polylines or circles as cross sections, you can create a solid object in the space between the cross sections.
    • In the Loft Options dialog box specify the following:
      • Select one of the surfacing options:
        • Ruled: The solid object or surface is ruled between the cross sections. The resulting object has sharp edges at all cross sections.
        • Smooth fit: A smooth solid or surface is drawn between the cross sections. The resulting object has sharp edges at the starting and ending cross sections.
        • Normal to: Specifies whether the surface normal is normal to the start cross section, to the end cross section, to both start and end cross section, or to all cross sections.
        • Draft angles: Specifies the draft angle and magnitude of the first and last cross sections for the lofted solid object or surface.
      • Close geometry: Closes or opens a torus-formed solid object or surface.
      • Show preview: Displays a preview in the graphics area.
    • Guides: Specify multiple entities defining guides that intersect each cross section to deterine the shape of the solid or surface.
    • Path: Specify an entity defining a single path curve to determine the shape of the solid or surface.
  4. A solid object or surface is created by lofting through of two or more cross section curves.

Access

Command: Loft

Menu: Solids > Draw > Loft



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