2012

Summary
SPLINE creates curves called nonuniform rational B-splines (NURBS), referred to
as splines for simplicity.
Splines are defined either with fit points, or with control vertices. By default,
fit points coincide with the spline, while control vertices define a control frame.
Control frames provide a convenient method to shape the spline. Each method
has its advantages.
For splines created with control vertices, you can display the control frame
by selecting the spline.
List of Prompts
The prompts that display depend on whether you create a spline with fit
points or with control vertices.
For splines created with the fit point method:
Specify first point or [
Method on page 1170/Degree on page 1173/Object on page
1171]:
For splines created with the control vertices method:
Specify first point or [
Method on page 1170/Knots on page 1171/Object on page
1171]:
First Point
Specifies the first point of the spline, either the first fit point or the first control
vertex, depending on the current method.
Method
Controls whether the spline is created with fit points or with control vertices.
(
SPLMETHOD on page 1667 system variable)
Fit Creates a degree 3 (cubic) B-spline by specifying fit points that the spline
must pass through. When the tolerance value is greater than 0, the spline
must be within the specified tolerance distance from each point.
Changing the Method updates the SPLMETHOD on page 1667 system variable.
1170 | Chapter 19 S Commands