2013

 BREAK (page 159) and TRIM (page 1101) generate a polyline with only the fit
spline, which is consistent with fit curves, where the curve fitting is
permanent.
 EXPLODE (page 411) deletes the frame and generates lines and arcs to
approximate the spline-fit polyline.

OFFSET (page 718) generates a polyline with only the fit spline, which is
consistent with its behavior with fit curves.

DIVIDE (page 361), MEASURE (page 614), and the Object option of AREA
(page 78) and HATCH (page 473) see only the fit spline, not the frame.
 STRETCH (page 1038) refits the spline to the stretched frame after a spline
is stretched.
The Join option of PEDIT decurves the spline and discards the spline
information of the original and any added polylines. Once the Join operation
is complete, you can fit a new spline to the resulting polyline.
The Edit Vertex options of PEDIT have the following effect:
 The Next and Previous options move the X marker only to points on the
frame of the spline, whether visible or not.
 The Break option discards the spline.
 The Insert, Move, Straighten, and Width options automatically refit the
spline.
 The Tangent option has no effect on splines.
Object snap uses only the spline-fit curve itself, not the frame. If you want to
snap to the frame control points, use PEDIT to recall the polyline frame first.
The
SPLINETYPE (page 1489) system variable controls the type of spline curve
approximated. Setting SPLINETYPE to 5 approximates a quadratic B-spline.
Setting SPLINETYPE to 6 approximates a cubic B-spline.
You can examine or change the fineness or coarseness of the spline
approximation with the
SPLINESEGS (page 1488) system variable, or you can
use AutoLISP
®
. The default value is 8. If you set the value higher, a greater
number of line segments are drawn and the approximation to the ideal spline
786 | Chapter 2 Commands