de.jreality.math

Class CubicBSpline

java.lang.Object

de.jreality.math.CubicBSpline

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

CubicBSpline.Default, CubicBSpline.Natural, CubicBSpline.Periodic

public class CubicBSpline
extends Object
implements Serializable

Interpolates a sorted function table y[i] = f( x[i] ) by cubic B-splines. The x values have to be sorted, that is, x[i] <= x[i+1].

The underlying mathematics is described in the classic scientific computing cookbook, Numerical Recipes.

There are three subclasses to choose from (TODO: document them):

• Default:
• Natural:
• Periodic:

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CubicBSpline.Default
static class	CubicBSpline.Natural
static class	CubicBSpline.Periodic

Method Summary

Modifier and Type	Method and Description
double[]	getDDY()
int	getIndexOfClosestXValue(double X)
int	getLengthOfTable()
double[]	getX()
double	getX(int index)
double[]	getY()
double	getY(int index)
void	setX(double[] x)
void	setXY(double[] x, double[] y)
void	setXY(int index, double X, double Y)
void	setY(double[] y)
double	valueAt(double x)
double	valueAt(double X, int derivative)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

valueAt

public double valueAt(double x)

valueAt

public double valueAt(double X,
                      int derivative)

getLengthOfTable

public int getLengthOfTable()

getX

public double[] getX()

getX

public double getX(int index)

getY

public double getY(int index)

getY

public double[] getY()

getDDY

public double[] getDDY()

setX

public void setX(double[] x)

setY

public void setY(double[] y)

setXY

public void setXY(int index,
                  double X,
                  double Y)

getIndexOfClosestXValue

public int getIndexOfClosestXValue(double X)

setXY

public void setXY(double[] x,
                  double[] y)