ru.sscc.spline.polynomial
Class PSplineWorkspace

java.lang.Object
  |
  +--ru.sscc.spline.SplineWorkspace
        |
        +--ru.sscc.spline.mesh.SimpleMeshWorkspace
              |
              +--ru.sscc.spline.polynomial.PSplineWorkspace

public class PSplineWorkspace

extends SimpleMeshWorkspace

The workspace for 1D polynomial spline having full polynomial representation in mesh nodes.

Field Summary

protected int	derivative Derivative to calculate.
protected int	maxDegree The maximum degree of polynomials in spline representation.
protected double	scale Mesh scale factor.
protected double[]	weight Weight vector prepared for derivative calculation (its length should be not less than maxDegree).

Fields inherited from class ru.sscc.spline.mesh.SimpleMeshWorkspace

cellIndex, cellPoint

Fields inherited from class ru.sscc.spline.SplineWorkspace

data, dataCount, dataIndex

Constructor Summary

protected	PSplineWorkspace(RealPointer data, double scale) Simple constructor with default initialization of internal attributes except scale factor.
protected	PSplineWorkspace(RealPointer data, double scale, int maxDegree) Constructor.

Method Summary

double	calculate() Calculates polynomial using prepared internal attributes.
void	setDerivative(int derivative) Sets a derivative number for the next spline calculation.

Methods inherited from class java.lang.Object

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

Field Detail

derivative

protected int derivative

Derivative to calculate.

weight

protected double[] weight

Weight vector prepared for derivative calculation (its length should be not less than maxDegree).

maxDegree

protected int maxDegree

The maximum degree of polynomials in spline representation.

scale

protected double scale

Mesh scale factor.

Constructor Detail

PSplineWorkspace

protected PSplineWorkspace(RealPointer data,
                           double scale)

Simple constructor with default initialization of internal attributes except scale factor.

PSplineWorkspace

protected PSplineWorkspace(RealPointer data,
                           double scale,
                           int maxDegree)

Constructor. Allocates the weight array of maxDegree length.

Parameters:

data - a pointer to spline coefficients container

scale - a mesh scale factor

maxDegree - a maximum spline degree (equals to internal degree)

Method Detail

setDerivative

public void setDerivative(int derivative)

Sets a derivative number for the next spline calculation. If derivative is changed, prepares the weight vector also.

calculate

public double calculate()

Calculates polynomial using prepared internal attributes. They are: the point cellPoint, the pointer data to coefficients, the dataCount containing polynomial degree + 1, the derivative number, and the weight array if a derivative is calculated.