org.opensourcephysics.numerics
Class PBC

java.lang.Object
  org.opensourcephysics.numerics.PBC

public class PBC
extends java.lang.Object

Implements methods to support periodic boundary condtions.

Author:

W. Christian

Method Summary

static double	position(double r, double size) Adjusts the postion of a particle assuming peridoic boundary conditions.
static int	position(int r, int size) Adjusts the postion of a particle assuming peridoic boundary conditions.
static double	separation(double dr, double size) Computes the minimum separation using periodic boundary conditions.
static int	separation(int dr, int size) Computes the minimum separation using periodic boundary conditions.

Methods inherited from class java.lang.Object

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

Method Detail

position

public static double position(double r,
                              double size)

Adjusts the postion of a particle assuming peridoic boundary conditions. The postion will be in the interval [0,size).

Parameters:

r - double

size - double

Returns:

double

position

public static int position(int r,
                           int size)

Adjusts the postion of a particle assuming peridoic boundary conditions. The postion will be in the interval [0,size).

Parameters:

r - int

size - int

Returns:

int

separation

public static double separation(double dr,
                                double size)

Computes the minimum separation using periodic boundary conditions.

Parameters:

dr - double the separation

size - double the box size

Returns:

double

separation

public static int separation(int dr,
                             int size)

Computes the minimum separation using periodic boundary conditions.

Parameters:

dr - int the separation

size - int the box size

Returns:

int