jvx.numeric
Class PnOde

java.lang.Object
  |
  +--jv.object.PsObject
        |
        +--jvx.numeric.PnOde

All Implemented Interfaces:

java.lang.Cloneable, PsUpdateIf, java.io.Serializable

Direct Known Subclasses:

PnElasticCurvature, PnElasticOde, PnOdeExpr, PnSurfaceOde

public class PnOde

extends PsObject

Basic ode class with solver. User should override the method diffEquation with his own ode and then call solve(PgPolygon).

Version:

02.10.99, 1.10 revised (kp) Moved to jv.numeric from vgp.tutor.ode.
00.00.98, 1.00 created (kp)

Author:

Konrad Polthier

See Also:

Serialized Form

Field Summary

protected double	m_length
protected int	m_order
protected double	m_stepSize
protected double	m_x0
protected double[]	m_y0

Fields inherited from class jv.object.PsObject

HAS_CONFIG_PANEL, HAS_INFO_PANEL, HAS_MATERIAL_PANEL, INSPECTOR_INFO, INSPECTOR_INFO_EXT, IS_DELETED, IS_FIXED, IS_SELECTED, IS_USED, m_infoPanel, m_name, m_panelList, m_parent, m_tag, m_updateList, NUM_TAGS

Constructor Summary

PnOde()

Method Summary

void	diffEquation(double x, double[] y, double[] dy) Method should be overwritten y an application with problem dependent ODE.
void	init() If instance has missing name then assign default name 'object_NUMBER' where number is the total number of already created instances.
static void	rungeKutta(PnOde anOde, double x, double[] y, double h, double[] yOut) 4th order Runge-Kutta method.
void	setInitialData(double x, double[] y, double h, double len)
void	setOrder(int order)
void	solve(PgPolygon p)
static boolean	solve(PgPolygon p, PnOde anOde, double xStart, double[] yStart, double h, double xLength) Ode solver of an initial value problem performing a number of RK steps.

Methods inherited from class jv.object.PsObject

addInspector, addUpdateListener, clearTag, clone, clone, clone, copy, getFather, getInfoPanel, getInspector, getName, getNumObjects, hasInspector, hasTag, hasUpdateListener, instanceOf, instanceOf, removeInspector, removeUpdateListener, setName, setParent, setTag, toString, update, updatePanels

Methods inherited from class java.lang.Object

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

Field Detail

m_order

protected int m_order

m_x0

protected double m_x0

m_y0

protected double[] m_y0

m_stepSize

protected double m_stepSize

m_length

protected double m_length

Constructor Detail

PnOde

public PnOde()

Method Detail

init

public void init()

Description copied from class: PsObject

If instance has missing name then assign default name 'object_NUMBER' where number is the total number of already created instances.

Overrides:

init in class PsObject

setOrder

public void setOrder(int order)

setInitialData

public void setInitialData(double x,
                           double[] y,
                           double h,
                           double len)

solve

public void solve(PgPolygon p)

diffEquation

public void diffEquation(double x,
                         double[] y,
                         double[] dy)

Method should be overwritten y an application with problem dependent ODE.

solve

public static boolean solve(PgPolygon p,
                            PnOde anOde,
                            double xStart,
                            double[] yStart,
                            double h,
                            double xLength)

Ode solver of an initial value problem performing a number of RK steps.

rungeKutta

public static void rungeKutta(PnOde anOde,
                              double x,
                              double[] y,
                              double h,
                              double[] yOut)

4th order Runge-Kutta method.