This is documentation for Mathematica 7, which was
based on an earlier version of the Wolfram Language.

# SplineClosed

 SplineClosed is an option for B-spline functions and graphics primitives which specifies whether spline curves or surfaces should be closed.
• For curves, the setting makes the first and last points be connected smoothly.
• For higher dimension surfaces and manifolds, makes all boundaries be connected smoothly.
• With the setting , all boundaries are connected smoothly.
• With the setting SplineClosed->{c1, c2, ...}, the boundaries are connected in directions i for which ci is True.
Generally, B-spline curve is open and passing through the first and last control points.
Smoothly closed B-spline curve with the same control points:
B-spline closed in v-direction:
Generally, B-spline curve is open and passing through the first and last control points.
 Out[2]=
Smoothly closed B-spline curve with the same control points:
 Out[3]=

B-spline closed in v-direction:
 Out[1]=
 Scope   (1)
B-spline surface closed in both directions:
Construct open B-spline curve from B-spline basis functions:
The basis functions differ by their indices:
Construct closed B-spline curve from uniform B-spline basis functions:
The basis functions are periodic. Thus they are of the same shape:
New in 7