Package pulse.problem.schemes.rte.dom

Class HermiteInterpolator

java.lang.Object

pulse.problem.schemes.rte.dom.HermiteInterpolator

All Implemented Interfaces:

Serializable

public class HermiteInterpolator
extends Object
implements Serializable

A globally C¹ Hermite interpolator used to interpolate intensities and derivatives in discrete ordinates method when solving the radiative transfer equation with a Runge-Kutta solver (either implicit or explicit).

Author:

Vadim Zborovskii, Artem Lunev

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected double	a
protected double	bMinusA
protected double	d0
protected double	d1
protected double	y0
protected double	y1

Constructor Summary

Constructors

Constructor	Description
HermiteInterpolator()

Method Summary

Modifier and Type	Method	Description
void	clear()
double	derivative(double x)	Calculates the derivative of the interpolant at x
double	interpolate(double x)	Interpolates the function at x
double[][][]	interpolateOnExternalGrid(int externalGridSize, AdaptiveIntegrator integrator)	Interpolates intensities and their derivatives w.r.t.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

y1

protected double y1

y0

protected double y0

d1

protected double d1

d0

protected double d0

a

protected double a

bMinusA

protected double bMinusA

Constructor Detail

HermiteInterpolator

public HermiteInterpolator()

Method Detail

clear

public void clear()

interpolate

public double interpolate(double x)

Interpolates the function at x

Parameters:

x - the value within the specified bounds

Returns:

the interpolated value

derivative

public double derivative(double x)

Calculates the derivative of the interpolant at x

Parameters:

x - the value within the specified bounds

Returns:

the derivative of the interpolant

toString

public String toString()

Overrides:

toString in class Object

interpolateOnExternalGrid

public double[][][] interpolateOnExternalGrid(int externalGridSize,
                                              AdaptiveIntegrator integrator)

Interpolates intensities and their derivatives w.r.t. tau on EXTERNAL grid points of the heat problem solver based on the derivatives on INTERNAL grid points of DOM solver.

Parameters:

externalGridSize - the number of points in the external grid

integrator - the adaptive integrator

Returns:

a three-dimensional array containing the interpolated intensities and derivatives