A cubic spline is a smooth, connected sequence of cubic curves
passing through a given sequence of points. This module provides
cubicSpline method, which can be used to create closed or
open cubic splines from a list of points. For access to the
internals of the spline generation algorithm (including in
particular a solver for cyclic tridiagonal systems of linear
equations), see Diagrams.CubicSpline.Internal.
Constructing paths from cubic splines
Construct a spline path-like thing of cubic segments from a list of vertices, with the first vertex as the starting point. The first argument specifies whether the path should be closed.
pts = map p2 [(0,0), (2,3), (5,-2), (-4,1), (0,3)] dot = circle 0.2 # fc blue # lw 0 mkPath closed = position (zip pts (repeat dot)) <> cubicSpline closed pts # lw 0.05 cubicSplineEx = (mkPath False ||| strutX 2 ||| mkPath True) # centerXY # pad 1.1
For more information, see http://mathworld.wolfram.com/CubicSpline.html.