2011

Exit
Exits Edit Vertex mode.
Fit
Creates an arc-fit polyline, a smooth curve consisting of arcs joining each pair
of vertices. The curve passes through all vertices of the polyline and uses any
tangent direction you specify.
Spline
Uses the vertices of the selected polyline as the control points, or frame, of a
curve approximating a B-spline. This curve, called a spline-fit polyline, passes
through the first and last control points unless the original polyline was closed.
The curve is pulled toward the other points but does not necessarily pass
through them. The more control points you specify in a particular part of the
frame, the more pull they exert on the curve. Quadratic and cubic spline-fit
polylines can be generated.
Spline-fit polylines are very different from the curves produced by the Fit
option. Fit constructs pairs of arcs that pass through every control point. Both
of these curves are different from true B-splines produced with the SPLINE
command.
If the original polyline included arc segments, they are straightened when the
spline's frame is formed. If the frame has width, the resulting spline tapers
smoothly from the width of the first vertex to the width of the last vertex. All
intermediate width information is ignored. Once spline-fit, the frame, if
displayed, is shown with zero width and CONTINUOUS linetype. Tangent
specifications on control point vertices have no effect on spline-fitting.
774 | Chapter 16 P Commands