Public Member Functions
	CubicSpline ()
	Default constructor.

void	init (int N, double derivStart, double derivEnd)
	Initialization of the spline function.

void	setKnot (int i, double x, double y)
	Sets the position of a knot of the spline function.

int	knotCount () const
	Returns the number of knots.

double	derivStart () const
	Returns first derivative of spline function at knot 0.

double	derivEnd () const
	Returns first derivative of spline function at the last knot.

double	knotX (int i) const
	Returns the X coordinate of the i-th knot.

double	knotY (int i) const
	Returns the Y coordinate of the i-th knot.

double	knotY2 (int i) const
	Returns the second derivative at the i-th knot.

void	prepareSpline ()
	Calculates the second derivatives of the cubic spline.

double	eval (double x) const
	Evaluates the spline function at position x.

double	eval (double x, double &deriv) const
	Evaluates the spline function and its first derivative at position x.

double	cutoff () const
	Returns the cutoff radius of this spline function.

void	writeGnuplot (const FPString &filename, const FPString &title) const
	Create a Gnuplot script that displays the spline function.

Detailed Description

A one-dimensional cubic spline function.

The spline consists of N knots with coordinates (x,y) ordered along the x-axis.

The first derivative of the function must be explicitly specified at the first and the last knot.

The documentation for this class was generated from the following files:

Public Member Functions