org.hipparchus.samples.genetics

Class PolygonChromosome

java.lang.Object

org.hipparchus.genetics.Chromosome

org.hipparchus.genetics.AbstractListChromosome<Polygon>

org.hipparchus.samples.genetics.PolygonChromosome

All Implemented Interfaces:

Comparable<Chromosome>, Fitness

public class PolygonChromosome
extends AbstractListChromosome<Polygon>

A simple chromosome representing a list of polygons.

Constructor Summary

Constructors

Constructor and Description
PolygonChromosome(List<Polygon> representation)

Method Summary

Modifier and Type	Method and Description
protected void	checkValidity(List<Polygon> chromosomeRepresentation) Asserts that representation can represent a valid chromosome.
void	draw(Graphics2D g, int width, int height)
double	fitness() Calculate the fitness function for this chromosome.
List<Polygon>	getPolygonRepresentation() Return the internal representation, which is needed for our custom mutation policy.
AbstractListChromosome<Polygon>	newFixedLengthChromosome(List<Polygon> chromosomeRepresentation) Creates a new instance of the same class as this is, with a given arrayRepresentation.
static Chromosome	randomChromosome(int polygonLength, int polygonCount)
static void	setRefImage(BufferedImage ref)
static void	setTestImage(BufferedImage image)
String	toString()

Methods inherited from class org.hipparchus.genetics.AbstractListChromosome

getLength, getRepresentation

Methods inherited from class org.hipparchus.genetics.Chromosome

compareTo, findSameChromosome, getFitness, isSame, searchForFitnessUpdate

Methods inherited from class java.lang.Object

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

Constructor Detail

PolygonChromosome

public PolygonChromosome(List<Polygon> representation)

Method Detail

setRefImage

public static void setRefImage(BufferedImage ref)

setTestImage

public static void setTestImage(BufferedImage image)

checkValidity

protected void checkValidity(List<Polygon> chromosomeRepresentation)
                      throws MathIllegalArgumentException

Description copied from class: AbstractListChromosome

Asserts that representation can represent a valid chromosome.

Specified by:

checkValidity in class AbstractListChromosome<Polygon>

Parameters:

chromosomeRepresentation - representation of the chromosome

Throws:

MathIllegalArgumentException - iff the representation can not represent a valid chromosome

newFixedLengthChromosome

public AbstractListChromosome<Polygon> newFixedLengthChromosome(List<Polygon> chromosomeRepresentation)

Description copied from class: AbstractListChromosome

Creates a new instance of the same class as this is, with a given arrayRepresentation. This is needed in crossover and mutation operators, where we need a new instance of the same class, but with different array representation.

Usually, this method just calls a constructor of the class.

Specified by:

newFixedLengthChromosome in class AbstractListChromosome<Polygon>

Parameters:

chromosomeRepresentation - the inner array representation of the new chromosome.

Returns:

new instance extended from FixedLengthChromosome with the given arrayRepresentation

getPolygonRepresentation

public List<Polygon> getPolygonRepresentation()

Return the internal representation, which is needed for our custom mutation policy.

Returns:

the list of polygons

fitness

public double fitness()

Calculate the fitness function for this chromosome.

For this purpose, we first draw the polygons on the test buffer, and then compare the resulting image pixel by pixel with the reference image.

Returns:

fitness

draw

public void draw(Graphics2D g,
                 int width,
                 int height)

toString

public String toString()

Description copied from class: AbstractListChromosome

Overrides:

toString in class AbstractListChromosome<Polygon>

randomChromosome

public static Chromosome randomChromosome(int polygonLength,
                                          int polygonCount)