This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.

# SplineClosed

 SplineClosed is an option for B-spline functions and graphics primitives that specifies whether spline curves or surfaces should be closed.
• For curves, the setting SplineClosed->True makes the first and last points be connected smoothly.
• For higher-dimension surfaces and manifolds, SplineClosed->True makes all boundaries be connected smoothly.
• With the setting SplineClosed, the boundaries are connected in directions i for which is True.
Generally, a B-spline curve is open and passes through the first and last control points:
Smoothly closed B-spline curve with the same control points:
B-spline closed in the -direction:
Generally, a B-spline curve is open and passes 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 the -direction:
 Out[1]=
 Scope   (1)
B-spline surface closed in both directions:
Construct an open B-spline curve from B-spline basis functions:
The basis functions differ by their indices:
Construct a closed B-spline curve from uniform B-spline basis functions:
The basis functions are periodic. Thus they are of the same shape:
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