tense_curve(x, y, xf [, tension][,
Interpolates arbitrary open curves using splines under tension, and
returns a 2D array containing the x and y coordinates of the
interpolated points. The input points have coordinates
x must be in ascending
order. The interpolation is performed at points determined by the
fraction of curve length from the start,
xf, which ranges
between 0 and 1.
tension governs the tenseness of the
interpolation curve. It defaults to
1 and must not be smaller.
drhs are the desired first
derivatives at the left-hand and right-hand sides, respectively.
See also: tense, tense_loop