Class VonNeumannGeometry

Object

AbstractGeometry

AbstractLattice

SquareGeometry

VonNeumannGeometry

public class VonNeumannGeometry
extends SquareGeometry

Square lattice with von Neumann neighbourhood (four nearest neighbours).

Field Summary

Fields inherited from class AbstractLattice

fixedBoundary

Fields inherited from class AbstractGeometry

connectivity, EMPTY_LINKS, engine, features, in, isInterspecies, isRegular, isRewired, isSingle, isUndirected, isValid, kin, kout, logger, name, network2D, network3D, out, pAddwire, pRewire, size, specs, type

Constructor Summary

Constructors

Constructor	Description
VonNeumannGeometry(EvoLudo engine)	Create a von Neumann square lattice geometry tied to the given engine.

Method Summary

Modifier and Type	Method	Description
private void	adjustBoundaries(int side, int fullside, int offset, boolean interspecies)	Adjust von Neumann neighbourhoods when fixed boundaries are requested.
protected boolean	checkSettings()	Hook for subclasses to implement geometry specific checks.
void	init()	Generates square regular lattices with arbitrary neighbourhood sizes.
boolean	parse(String arg)	Parse geometry-specific CLI options.

Methods inherited from class SquareGeometry

ensureSquareSize, initSquare, initSquareSelf, prepareSquareLattice, warnIfConnectivityProvided

Methods inherited from class AbstractLattice

clone, equals, hashCode, isFixedBoundary, setFixedBoundary, stripBoundary

Methods inherited from class AbstractGeometry

addDirected, addEdgeAt, addLinkAt, addUndirected, alloc, check, clearLinksFrom, clearLinksTo, create, create, decodeGeometry, deriveCompetitionGeometry, displaySingle, encodeGeometry, enforceSize, getAddwire, getConnectivity, getEncodeKey, getFeatures, getLabel, getName, getNetwork2D, getNetwork3D, getRewire, getSize, getSpecs, getType, isConsistent, isGraphConnected, isInterspecies, isLattice, isNeighborOf, isRegular, isRewired, isSingle, isType, isUndirected, isUnique, parse, removeEdgeAt, removeLinkAt, rewire, rewireDirected, rewireEdgeAt, rewireLinkAt, rewireUndirected, setAddwire, setConnectivity, setInterspecies, setName, setNetwork2D, setNetwork3D, setRewire, setSingle, setSize, setType, swapEdges, usage, warn

Methods inherited from class Object

finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Details

VonNeumannGeometry

public VonNeumannGeometry(EvoLudo engine)

Create a von Neumann square lattice geometry tied to the given engine.

Parameters:

engine - EvoLudo pacemaker

Method Details

parse

public boolean parse(String arg)

Description copied from class: AbstractGeometry

Parse geometry-specific CLI options.

Overrides:

parse in class SquareGeometry

Parameters:

arg - the argument string without the geometry key

Returns:

true if parsing succeeded, false if invalid

init

public void init()

Description copied from class: SquareGeometry

Generates square regular lattices with arbitrary neighbourhood sizes. Variant-specific initializers for standard stencils are available to subclasses.

Requirements/notes:

1. Population size must be a perfect square \(N=n^2\).
2. Admissible connectivities are \(4\) (von Neumann) or \((2m+1)^2-1\) for Moore-type stencils.
3. Inter-species interactions add the focal node as a neighbour and allow connectivity \(1\).
4. Boundaries are periodic by default but can be fixed.

Overrides:

init in class SquareGeometry

adjustBoundaries

private void adjustBoundaries(int side,
 int fullside,
 int offset,
 boolean interspecies)

Adjust von Neumann neighbourhoods when fixed boundaries are requested.

Parameters:

side - side length of the (sub) lattice

fullside - global side length

offset - index offset into the population

interspecies - true if self-links are required

checkSettings

protected boolean checkSettings()

Description copied from class: AbstractGeometry

Hook for subclasses to implement geometry specific checks.

Overrides:

checkSettings in class SquareGeometry

Returns:

true if adjustments require a reset