Terrain

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org.vrspace.vrmlclient
Class Terrain

java.lang.Object
  org.vrspace.vrmlclient.Terrain

Direct Known Subclasses:: ImageTerrain

public class Terrain
extends java.lang.Object

Field Summary

java.lang.String appearance


(package private) int dim


(package private) java.awt.Frame frame


(package private) double[][] h


(package private) double h1


(package private) double h2


(package private) double h3


(package private) double h4


double height
          used for height calculation and vrml generation

RGB land
          land color: between seaLevel and topLevel

(package private) int lod
          level of detail and number of iterations, grid size is 2^lod

(package private) double max
          min and max height

(package private) double min
          min and max height

private boolean reset


(package private) java.util.Random rng


(package private) double roughness


(package private) double scale


RGB sea
          sea color: all below seaLevel

double seaLevel
          below this use sea color, default 0

(package private) long seed


double size
          grid size, used in vrml generation

RGB top
          top color: above landLevel

double topLevel
          above this use top color, default .7

(package private) java.util.Stack undo


(package private) double x


(package private) double z


Constructor Summary

protected Terrain()


Terrain(double x, double z, int lod, double size, double h1, double h2, double h3, double h4, double roughness, long seed)
          Creates new random fractal terrain, at position (x,z), with heights at corners h1...h4.
Generates new fractal terrain with specified level of detail unless lod is 1.

Method Summary

double cellSize()
          Returns size of one grid element

private void diamond(int x, int y, int side, double scale)


double getAltitude(double x, double z)
          relative (0..1) altitude at absolute point (x,z)

double getAltitude(int i, int j)
          Relative altitude (0...1) at index (i,j)

float[][] getColor()
          Retreives terrain color as float[][]

RGB getColor(double a)
          Color at relative (0...1) height

RGB getColor(int i, int j)
          Color at index (i,j)

double getDistance(double x, double y, double z)
          Distance (altitude) between this point and the terrain

float[] getHeight()
          Returns height matrix as float[]

double getHeight(double x, double z)
          Absolute altitude (-size...size) at absolute point (x,z)

double getHeight(int i, int j)
          Absolute altitude (-size...size) at index (i,j)

java.lang.String gridVrml()
          VRML 2.0 ElevationGrid string

boolean isOver(double x, double z)
          Is point (x,z) over this terrain?

(package private) void iteration(int i)


java.lang.String nullGridVrml()
          VRML 2.0 string with 0 heights and colors

private double rnd()


private void setupHeight()


private void square(int x, int y, int side, double scale)


Terrain subTerrain(double x, double z, double size)
          Creates terrain from this terrain, with center at (x,z) and specified size
IMPORTANT:
new terrain may not have specified size nor coordinates!

Terrain subTerrain(int x, int z, int lod)
          Creates subset of this terrain at index (x,z) with specified lod.

java.lang.String toVrml()
          VRML 2.0 Transform string

int xIndex(double x)
          Index of grid element on this position

int zIndex(double z)
          Index of grid element on this position

void zoomIn()
          Zoom in - increases level of detail

void zoomOut()
          Zoom out - level of detail decreases.

Methods inherited from class java.lang.Object

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

Field Detail

dim

int dim

x

double x

z

double z

h

double[][] h

h1

double h1

h2

double h2

h3

double h3

h4

double h4

roughness

double roughness

lod

int lod

level of detail and number of iterations, grid size is 2^lod

size

public double size

grid size, used in vrml generation

height

public double height

used for height calculation and vrml generation

min

double min

min and max height

max

double max

min and max height

rng

java.util.Random rng

reset

private boolean reset

seed

long seed

scale

double scale

sea

public RGB sea

sea color: all below seaLevel

land

public RGB land

land color: between seaLevel and topLevel

top

public RGB top

top color: above landLevel

seaLevel

public double seaLevel

below this use sea color, default 0

topLevel

public double topLevel

above this use top color, default .7

appearance

public java.lang.String appearance

frame

java.awt.Frame frame

undo

java.util.Stack undo

Constructor Detail

Terrain

protected Terrain()

Terrain

public Terrain(double x,
               double z,
               int lod,
               double size,
               double h1,
               double h2,
               double h3,
               double h4,
               double roughness,
               long seed)

Creates new random fractal terrain, at position (x,z), with heights at corners h1...h4.
Generates new fractal terrain with specified level of detail unless lod is 1.

Method Detail

setupHeight

private void setupHeight()

iteration

void iteration(int i)

diamond

private void diamond(int x,
                     int y,
                     int side,
                     double scale)

square

private void square(int x,
                    int y,
                    int side,
                    double scale)

rnd

private double rnd()

getAltitude

public double getAltitude(double x,
                          double z)

relative (0..1) altitude at absolute point (x,z)

getAltitude

public double getAltitude(int i,
                          int j)

Relative altitude (0...1) at index (i,j)

cellSize

public double cellSize()

Returns size of one grid element

getColor

public RGB getColor(int i,
                    int j)

Color at index (i,j)

getColor

public RGB getColor(double a)

Color at relative (0...1) height

toVrml

public java.lang.String toVrml()

VRML 2.0 Transform string

nullGridVrml

public java.lang.String nullGridVrml()

VRML 2.0 string with 0 heights and colors

gridVrml

public java.lang.String gridVrml()

VRML 2.0 ElevationGrid string

zoomOut

public void zoomOut()

Zoom out - level of detail decreases.

zoomIn

public void zoomIn()

Zoom in - increases level of detail

xIndex

public int xIndex(double x)

Index of grid element on this position

zIndex

public int zIndex(double z)

Index of grid element on this position

subTerrain

public Terrain subTerrain(double x,
                          double z,
                          double size)

Creates terrain from this terrain, with center at (x,z) and specified size
IMPORTANT:
new terrain may not have specified size nor coordinates!

subTerrain

public Terrain subTerrain(int x, int z, int lod)

Creates subset of this terrain at index (x,z) with specified lod.

getHeight

public float[] getHeight()

Returns height matrix as float[]

isOver

public boolean isOver(double x, double z)

Is point (x,z) over this terrain?

getDistance

public double getDistance(double x, double y, double z)

Distance (altitude) between this point and the terrain

getHeight

public double getHeight(double x, double z)

Absolute altitude (-size...size) at absolute point (x,z)

getHeight

public double getHeight(int i, int j)

Absolute altitude (-size...size) at index (i,j)

getColor

public float[][] getColor()

Retreives terrain color as float[][]

Overview Package Class Use Deprecated Index

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Field Summary
`java.lang.String`	`appearance`
`(package private) int`	`dim`
`(package private) java.awt.Frame`	`frame`
`(package private) double[][]`	`h`
`(package private) double`	`h1`
`(package private) double`	`h2`
`(package private) double`	`h3`
`(package private) double`	`h4`
`double`	`height` used for height calculation and vrml generation
`RGB`	`land` land color: between seaLevel and topLevel
`(package private) int`	`lod` level of detail and number of iterations, grid size is 2^lod
`(package private) double`	`max` min and max height
`(package private) double`	`min` min and max height
`private boolean`	`reset`
`(package private) java.util.Random`	`rng`
`(package private) double`	`roughness`
`(package private) double`	`scale`
`RGB`	`sea` sea color: all below seaLevel
`double`	`seaLevel` below this use sea color, default 0
`(package private) long`	`seed`
`double`	`size` grid size, used in vrml generation
`RGB`	`top` top color: above landLevel
`double`	`topLevel` above this use top color, default .7
`(package private) java.util.Stack`	`undo`
`(package private) double`	`x`
`(package private) double`	`z`

Constructor Summary
`protected`	`Terrain()`
	`Terrain(double x, double z, int lod, double size, double h1, double h2, double h3, double h4, double roughness, long seed)` Creates new random fractal terrain, at position (x,z), with heights at corners h1...h4. Generates new fractal terrain with specified level of detail unless lod is 1.

Method Summary
`double`	`cellSize()` Returns size of one grid element
`private void`	`diamond(int x, int y, int side, double scale)`
`double`	`getAltitude(double x, double z)` relative (0..1) altitude at absolute point (x,z)
`double`	`getAltitude(int i, int j)` Relative altitude (0...1) at index (i,j)
`float[][]`	`getColor()` Retreives terrain color as float[][]
`RGB`	`getColor(double a)` Color at relative (0...1) height
`RGB`	`getColor(int i, int j)` Color at index (i,j)
`double`	`getDistance(double x, double y, double z)` Distance (altitude) between this point and the terrain
`float[]`	`getHeight()` Returns height matrix as float[]
`double`	`getHeight(double x, double z)` Absolute altitude (-size...size) at absolute point (x,z)
`double`	`getHeight(int i, int j)` Absolute altitude (-size...size) at index (i,j)
`java.lang.String`	`gridVrml()` VRML 2.0 ElevationGrid string
`boolean`	`isOver(double x, double z)` Is point (x,z) over this terrain?
`(package private) void`	`iteration(int i)`
`java.lang.String`	`nullGridVrml()` VRML 2.0 string with 0 heights and colors
`private double`	`rnd()`
`private void`	`setupHeight()`
`private void`	`square(int x, int y, int side, double scale)`
`Terrain`	`subTerrain(double x, double z, double size)` Creates terrain from this terrain, with center at (x,z) and specified size IMPORTANT: new terrain may not have specified size nor coordinates!
`Terrain`	`subTerrain(int x, int z, int lod)` Creates subset of this terrain at index (x,z) with specified lod.
`java.lang.String`	`toVrml()` VRML 2.0 Transform string
`int`	`xIndex(double x)` Index of grid element on this position
`int`	`zIndex(double z)` Index of grid element on this position
`void`	`zoomIn()` Zoom in - increases level of detail
`void`	`zoomOut()` Zoom out - level of detail decreases.

org.vrspace.vrmlclient Class Terrain

dim

x

z

h

h1

h2

h3

h4

roughness

lod

size

height

min

max

rng

reset

seed

scale

sea

land

top

seaLevel

topLevel

appearance

frame

undo

Terrain

Terrain

setupHeight

iteration

diamond

square

rnd

getAltitude

getAltitude

cellSize

getColor

getColor

toVrml

nullGridVrml

gridVrml

zoomOut

zoomIn

xIndex

zIndex

subTerrain

subTerrain

getHeight

isOver

getDistance

getHeight

getHeight

getColor

org.vrspace.vrmlclient
Class Terrain