Autodesk AUTOCAD 2006, Справочник по командам, Страница: 1177 / 1490

The file is created with the .stl file name extension. The STL file format is
compatible with stereolithography apparatus (SLA). The solid data is transferred
to the SLA as a faceted representation of the model. The facets consist of a set
of triangles (with outward pointing normals) that approximate the faces of
the model. From the faceted data, the SLA workstation produces a set of
contours that defines a series of layers representing the part to be built.
The FACETRES system variable determines how the solid is triangulated. Setting
FACETRES to a higher value creates a finer mesh that more accurately represents
the model and also creates a much larger file. The model must lie in the
positive XYZ octant of the WCS.
STRETCH
Moves or stretches objects
Modify toolbar:
Modify menu: Stretch
Command line: stretch
Select objects to stretch by crossing-window or crossing-polygon...
Select objects: Use the cpolygon option or the crossing object selection method, and
press ENTER . Individually selected objects and objects that are completely enclosed
by the crossing selection are moved rather than stretched.
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STRETCH moves only the vertices and endpoints that lie inside the crossing
selection, leaving those outside unchanged. STRETCH does not modify 3D
solids, polyline width, tangent, or curve-fitting information.
Base Point
Specify base point or [Displacement] <last displacement>: Specify a base point or
enter displacement coordinates
Specify second point or <use first point as displacement>: Specify a second point, or
press ENTER to use the previous coordinates as a displacement
Statistics Dialog Box | 1153