net.java.dev.joode.stepper
Class MidPointMethodStepper

java.lang.Object
  net.java.dev.joode.stepper.MidPointMethodStepper

All Implemented Interfaces:

StepperFunction

public class MidPointMethodStepper
extends java.lang.Object
implements StepperFunction

Performs stepping using the mid point method. This requires two numerical evaluations, but is more accurate. Eulers method:- x(t+h) = x(t) + h*x'() where x'=f(x(t)) i.e. our kinimatic equations Midpoint method:- x(t+h) = x(t) + h*(f(x(t) + 0.5hf(x(t)))) So to compute this we need to first compute f(x(t)), like Euler. But not multiply it by h, instead h/2 (the midpoint)

Author:

Tom Larkworthy

Field Summary

static MidPointMethodStepper	INSTANCE
static Joint.Info2	Jinfo
static boolean	REPORT_ERROR

Fields inherited from interface net.java.dev.joode.stepper.StepperFunction

EULER, RK4

Method Summary

void	step(World world, Body[] body, int nb, Joint[] joint, int nj, float stepsize) steps the ISLAND of bodies one step using the mid point method

Methods inherited from class java.lang.Object

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

Field Detail

REPORT_ERROR

public static final boolean REPORT_ERROR

See Also:

Constant Field Values

INSTANCE

public static final MidPointMethodStepper INSTANCE

Jinfo

public static final Joint.Info2 Jinfo

Method Detail

step

public void step(World world,
                 Body[] body,
                 int nb,
                 Joint[] joint,
                 int nj,
                 float stepsize)

steps the ISLAND of bodies one step using the mid point method

Specified by:

step in interface StepperFunction