2011

The data that defines a spline is represented in one of two formats: as a control
frame or as fit points. The format can change depending on how the spline
was orginally created, the options selected from the grip menus, or the options
used in SPLINEDIT.
You can change any of following data:
■ Control frame data consists of control vertices, the polynomial degree of
the spline, and the weights assigned to each control vertex.
■ Fit data consists of fit points, knot parameterization, the fit tolerance, and
the tangents at the endpoints of the spline.
NOTE Switching from displaying control vertices to fit points automatically changes
the selected spline to degree 3. Splines originally created using higher-degree
equations will likely change shape as a result.
List of Prompts
The following prompts are displayed.
Select spline:
Enter an option [
Close on page 992/Join on page 992/Fit data on page 992/Edit
Vertex
on page 994/convert to Polyline on page 995/Reverse on page 996/Undo
on page 996] <eXit>:
Close/Open
One of the following options displays, depending on whether the selected
spline is open or closed. An open spline has two endpoints, while a closed
spline forms a loop.
Close Closes an open spline by defining the last point to be coincident with
the first and making it tangent at that point (C1 continuity).
Open Opens a closed spline by removing the final curve segment between
the first and last points specified when the spline was originally created.
Join
Combines a selected spline with other splines, lines, polylines, and arcs at
coincident endpoints to form a larger spline. Objects are joined with kinks at
the points where they are joined (C0 continuity).
Fit Data
Edits fit point data using the following options:
Enter a fit data option [Add on page 993/Close on page 993Delete on page
993/
Kink on page 993/Move on page 993/Purge on page 994/Tangents on page
994/
toLerance on page 994/eXit on page 994] <eXit>:
992 | Chapter 19 S Commands