Package etomica.potential

Class P1HardBoundary

java.lang.Object

etomica.potential.P1HardBoundary

All Implemented Interfaces:

Drawable, IPotential, IPotentialAtomic, PotentialHard

public class P1HardBoundary
extends java.lang.Object
implements PotentialHard, Drawable

Potential that places hard repulsive walls coinciding with the boundary of the box, which is assumed to be rectangular in shape.

Field Summary

Fields

Modifier and Type	Field	Description
protected Boundary	boundary

Constructor Summary

Constructors

Constructor	Description
P1HardBoundary(Space space)
P1HardBoundary(Space space, boolean ignoreOverlap)

Method Summary

Modifier and Type	Method	Description
void	bump(IAtomList a, double falseTime)	Implements the collision dynamics.
double	collisionTime(IAtomList a, double falseTime)	Computes the time of collision of the given atom(s) with the hard potential, assuming no intervening collisions.
void	draw(java.awt.Graphics g, int[] origin, double toPixel)
double	energy(IAtomList a)	Returns the interaction energy between the given atoms.
double	energyChange()	returns change in potential energy due to the last collision
double	getCollisionRadius()	Distance from the center of the sphere to the boundary at collision.
Dimension	getCollisionRadiusDimension()	Indicates collision radius has dimensions of Length.
double	getRange()	Returns the range over which the potential applies.
double	lastCollisionVirial()	Value of the virial from the most recent collision.
Tensor	lastCollisionVirialTensor()	Value of the virial from the most recent collision, decomposed into it tensoral elements.
double	lastWallVirial()
int	nBody()	The number of atoms on which the potential depends.
void	setActive(int dim, boolean first, boolean isActive)
void	setBox(Box box)	Informs the potential of the box on which it acts so that it can properly consider the boundaries.
void	setCollisionRadius(double d)	Distance from the center of the sphere to the boundary at collision.
void	setDrawingThickness(int newThickness)
void	setLongWall(int dim, boolean first, boolean longWall)

Methods inherited from class java.lang.Object

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

Field Detail

boundary

protected Boundary boundary

Constructor Detail

P1HardBoundary

public P1HardBoundary(Space space)

P1HardBoundary

public P1HardBoundary(Space space,
                      boolean ignoreOverlap)

Method Detail

nBody

public int nBody()

Description copied from interface: IPotential

The number of atoms on which the potential depends.

Specified by:

nBody in interface IPotential

getRange

public double getRange()

Description copied from interface: IPotential

Returns the range over which the potential applies. IAtoms with a greater separation do not interact.

Specified by:

getRange in interface IPotential

setBox

public void setBox(Box box)

Description copied from interface: IPotential

Informs the potential of the box on which it acts so that it can properly consider the boundaries.

Specified by:

setBox in interface IPotential

energy

public double energy(IAtomList a)

Description copied from interface: IPotentialAtomic

Returns the interaction energy between the given atoms. There might be 0, 1, 2 or more atoms in the AtomSet.

Specified by:

energy in interface IPotentialAtomic

energyChange

public double energyChange()

Description copied from interface: PotentialHard

returns change in potential energy due to the last collision

Specified by:

energyChange in interface PotentialHard

collisionTime

public double collisionTime(IAtomList a,
                            double falseTime)

Description copied from interface: PotentialHard

Computes the time of collision of the given atom(s) with the hard potential, assuming no intervening collisions. Usually assumes free-flight between collisions.

Specified by:

collisionTime in interface PotentialHard

bump

public void bump(IAtomList a,
                 double falseTime)

Description copied from interface: PotentialHard

Implements the collision dynamics. The given atom(s) is assumed to be at the point of collision. This method is called to change their momentum according to the action of the collision. Extensions can be defined to instead implement other, perhaps unphysical changes.

Specified by:

bump in interface PotentialHard

lastCollisionVirial

public double lastCollisionVirial()

Description copied from interface: PotentialHard

Value of the virial from the most recent collision.

Specified by:

lastCollisionVirial in interface PotentialHard

Returns:

double virial value

lastCollisionVirialTensor

public Tensor lastCollisionVirialTensor()

Description copied from interface: PotentialHard

Value of the virial from the most recent collision, decomposed into it tensoral elements.

Specified by:

lastCollisionVirialTensor in interface PotentialHard

Returns:

Tensor

lastWallVirial

public double lastWallVirial()

setCollisionRadius

public void setCollisionRadius(double d)

Distance from the center of the sphere to the boundary at collision.

getCollisionRadius

public double getCollisionRadius()

Distance from the center of the sphere to the boundary at collision.

getCollisionRadiusDimension

public Dimension getCollisionRadiusDimension()

Indicates collision radius has dimensions of Length.

setActive

public void setActive(int dim,
                      boolean first,
                      boolean isActive)

setLongWall

public void setLongWall(int dim,
                        boolean first,
                        boolean longWall)

setDrawingThickness

public void setDrawingThickness(int newThickness)

draw

public void draw(java.awt.Graphics g,
                 int[] origin,
                 double toPixel)

Specified by:

draw in interface Drawable