net.sf.freecol.server.generator
Class LandGenerator

java.lang.Object
  net.sf.freecol.server.generator.LandGenerator

public class LandGenerator
extends java.lang.Object

Class for creating a land map.

A land map is a two-dimensional array with the boolean values:

• true: land
• false: ocean

Field Summary

private int	genType
private int	height
private int	landMass
private boolean[][]	map
private OptionGroup	mapGeneratorOptions
private int	minimumNumberOfTiles
private int	numberOfLandTiles
private int	preferredDistanceToEdge
private java.util.Random	random
private int	width

Constructor Summary

LandGenerator(OptionGroup mapGeneratorOptions, java.util.Random random)
Creates a new LandGenerator.

Method Summary

private void	addLandmass(int minsize, int maxsize)
private void	addLandmass(int minsize, int maxsize, int x, int y) Tries to create a new land mass (unconnected to existing land masses) of size=maxsize, and adds it to the current map if it is at least size=minsize.
private void	addPolarRegions() Adds land to the first two and last two rows.
private void	cleanMap() Removes any 1x1 islands on the map.
private void	createClassicLandMap()
boolean[][]	createLandMap() Creates a new land map.
private void	growLand(int i, int j) Determines, based on position, number of adjacent land tiles and some random factor, whether a given map position should be set to land.
static boolean[][]	importLandMap(Game game) Imports the land map from the given Game.
private boolean	isSingleTile(int x, int y) Returns true if there are no adjacent land to the given coordinates.
private void	setLand(int x, int y) Sets a given map position to land.

Methods inherited from class java.lang.Object

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

Field Detail

mapGeneratorOptions

private final OptionGroup mapGeneratorOptions

random

private final java.util.Random random

map

private boolean[][] map

width

private int width

height

private int height

landMass

private int landMass

preferredDistanceToEdge

private int preferredDistanceToEdge

numberOfLandTiles

private int numberOfLandTiles

minimumNumberOfTiles

private int minimumNumberOfTiles

genType

private int genType

Constructor Detail

LandGenerator

public LandGenerator(OptionGroup mapGeneratorOptions,
                     java.util.Random random)

Creates a new LandGenerator.

Parameters:

mapGeneratorOptions - The options to be used when creating a land map.

random - The Random number source to use.

See Also:

createLandMap()

Method Detail

importLandMap

public static boolean[][] importLandMap(Game game)

Imports the land map from the given Game.

Parameters:

game - The Game to get the land map from.

Returns:

An array where true means land and false means ocean.

createLandMap

public boolean[][] createLandMap()

Creates a new land map.

Returns:

An array where true means land and false means ocean.

createClassicLandMap

private void createClassicLandMap()

addLandmass

private void addLandmass(int minsize,
                         int maxsize,
                         int x,
                         int y)

Tries to create a new land mass (unconnected to existing land masses) of size=maxsize, and adds it to the current map if it is at least size=minsize.

addLandmass

private void addLandmass(int minsize,
                         int maxsize)

addPolarRegions

private void addPolarRegions()

Adds land to the first two and last two rows.

cleanMap

private void cleanMap()

Removes any 1x1 islands on the map.

isSingleTile

private boolean isSingleTile(int x,
                             int y)

Returns true if there are no adjacent land to the given coordinates.

setLand

private void setLand(int x,
                     int y)

Sets a given map position to land. Calls #gl(int,int) for all valid adjacent map positions, which may recursively call setLand for these.

growLand

private void growLand(int i,
                      int j)

Determines, based on position, number of adjacent land tiles and some random factor, whether a given map position should be set to land. This is called for all valid map positions adjacent to a position that has been set to land by #setLand(int,int), and may recursively call setLand for the current position.