2004

674 | Chapter 23 Reference Other Drawing Files (Xrefs)
Polygonal Clipping Boundary
When you specify a polygonal clipping boundary, you are prompted to enter
points to define the boundary. As you specify the clipping points, AutoCAD
sketches the last segment of the polygon so that the boundary is closed at all
times. When you apply polygonal clipping to images in externally referenced
drawings, the clipping boundary is applied to the rectangular extents of the
polygonal boundary, rather than to the polygon itself.
Polyline Clipping Boundary
When you specify a polyline clipping boundary, you are prompted to select
a 2D polyline object. The clipping boundary is created coincident with the
polyline. Valid boundaries are 2D polylines with straight or spline-curved
segments. Polylines with arc segments, or fit-curved polylines, can be used as
the definition of the clip boundary, but the clip boundary will be created as
a straight segment representation of that polyline. If the polyline has arcs,
the clip boundary is created as if it had been decurved prior to being used as
a clip boundary. An open polyline is treated as if it were closed.
Clip Depth
The front and back clipping planes for xrefs can be set. The xref must contain
a clipping boundary before you can specify a clip depth. The clip depth is
always calculated normal to the clipping boundary. When defining clip
depth, you are prompted to specify a front and back point or distance relative
to the clipped plane. Regardless of the current UCS, the clip depth is applied
parallel to the clipping boundary.
existing drawings
another similar drawing is referenced
xref is clipped to show only the
conference table
resulting clipped xref