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LIFT
LIFT transforms points to lines, lines to 3D faces, 3D faces to polyface meshes,
polylines to polygon meshes, and open polygon meshes to groups of open polygon meshes.
The displacement gets specified like in the "move", "copy", and "stretch" commands.
Objects with a non-zero thickness cannot be selected.
Objects on locked layers
do not get lifted.If an edge of an original 3D face is invisible, then the corresponding side face of the new polyface mesh is left out. (Cf. "edge" command.)
Bulges of polylines are ignored (as if the arc segments were straightened; vertices connected directly by line segments).
If the original is a polygon mesh, the LIFT function will create five new meshes serving as "top" and "side" faces.
These meshes are combined to a group (cf. AutoCAD "group" command; not supported by IntelliCAD). The name of the group begins with "LIFT" and contains date and time of its creation.
Face normals of a created polyface mesh / group of polygon meshes:
Either all normals are pointing outward or all normals are pointing inward (provided that there are no self-intersecting faces or meshes).
Surface fit/smooth options are not supported yet.
LISP syntax:
(liftProcess selectionSet vector)
selectionSet - name of a selection set as returned by (ssget)
vector - 3D vector of displacement (list of X, Y, and Z components in the WCS)
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