Package com.jme3.terrain.heightmap

Class HillHeightMap

java.lang.Object

com.jme3.terrain.heightmap.AbstractHeightMap

com.jme3.terrain.heightmap.HillHeightMap

All Implemented Interfaces:

HeightMap

public class HillHeightMap
extends AbstractHeightMap

HillHeightMap generates a height map base on the Hill Algorithm. Terrain is generated by growing hills of random size and height at random points in the heightmap. The terrain is then normalized and valleys can be flattened.

See Also:

• Hill Algorithm

Field Summary

Fields inherited from class com.jme3.terrain.heightmap.AbstractHeightMap

filter, heightData, heightScale, NORMALIZE_RANGE, size

Constructor Summary

Constructors

Constructor	Description
HillHeightMap(int size, int iterations, float minRadius, float maxRadius)	Constructor sets the attributes of the hill system and generates the height map by using a random seed.
HillHeightMap(int size, int iterations, float minRadius, float maxRadius, long seed)	Constructor sets the attributes of the hill system and generates the height map.

Method Summary

Modifier and Type	Method	Description
protected void	addHill(float[][] tempBuffer, Random random)	Generates a new hill of random size and height at a random position in the heightmap.
boolean	load()	Generates a heightmap using the Hill Algorithm and the attributes set by the constructor or the setters.
void	setIterations(int iterations)	Sets the number of hills to grow.
void	setMaxRadius(float maxRadius)	Sets the minimum radius of a hill.
void	setMinRadius(float minRadius)	Sets the maximum radius of a hill.

Methods inherited from class com.jme3.terrain.heightmap.AbstractHeightMap

erodeTerrain, findMinMaxHeights, flatten, getHeightMap, getInterpolatedHeight, getScaledHeightAtPoint, getScaledHeightMap, getSize, getTrueHeightAtPoint, normalizeTerrain, save, setHeightAtPoint, setHeightScale, setMagnificationFilter, setSize, smooth, smooth, unloadHeightMap

Methods inherited from class java.lang.Object

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

Constructor Details

HillHeightMap

public HillHeightMap(int size,
 int iterations,
 float minRadius,
 float maxRadius,
 long seed)
              throws Exception

Constructor sets the attributes of the hill system and generates the height map.

Parameters:

size - size the size of the terrain to be generated

iterations - the number of hills to grow

minRadius - the minimum radius of a hill

maxRadius - the maximum radius of a hill

seed - the seed to generate the same heightmap again

Throws:

Exception - if size of the terrain is not greater than zero, or the number of iterations is not greater than zero

HillHeightMap

public HillHeightMap(int size,
 int iterations,
 float minRadius,
 float maxRadius)
              throws Exception

Constructor sets the attributes of the hill system and generates the height map by using a random seed.

Parameters:

size - size the size of the terrain to be generated

iterations - the number of hills to grow

minRadius - the minimum radius of a hill

maxRadius - the maximum radius of a hill

Throws:

Exception - if size of the terrain is not greater than zero, or number of iterations is not greater than zero

Method Details

load

public boolean load()

Generates a heightmap using the Hill Algorithm and the attributes set by the constructor or the setters.

Returns:

true if the load was successful, false otherwise.

addHill

protected void addHill(float[][] tempBuffer,
 Random random)

Generates a new hill of random size and height at a random position in the heightmap. This is the actual Hill algorithm. The Random object is used to guarantee the same heightmap for the same seed and attributes.

Parameters:

tempBuffer - the temporary height map buffer

random - the random number generator

setIterations

public void setIterations(int iterations)
                   throws Exception

Sets the number of hills to grow. More hills usually mean a nicer heightmap.

Parameters:

iterations - the number of hills to grow

Throws:

Exception - if iterations is not greater than zero

setMaxRadius

public void setMaxRadius(float maxRadius)
                  throws Exception

Sets the minimum radius of a hill.

Parameters:

maxRadius - the maximum radius of a hill

Throws:

Exception - if the maximum radius is not greater than zero or not greater than the minimum radius

setMinRadius

public void setMinRadius(float minRadius)
                  throws Exception

Sets the maximum radius of a hill.

Parameters:

minRadius - the minimum radius of a hill

Throws:

Exception - if the minimum radius is not greater than zero or not lower than the maximum radius