gov.nasa.worldwind.util

Class Level

java.lang.Object

gov.nasa.worldwind.util.Level

public class Level
extends java.lang.Object

Represents a level of a specific resolution in a LevelSet.

Field Summary

Fields

Modifier and Type	Field and Description
int	levelNumber The level's ordinal in its parent level set.
LevelSet	parent The LevelSet that this level is a member of.
double	texelHeight The size of pixels or elevation cells within this level, in radians per pixel (or per cell).
double	tileDelta The geographic width and height in degrees of tiles within this level.
int	tileHeight The parent LevelSet's tileHeight.
int	tileWidth The parent LevelSet's tileWidth.

Constructor Summary

Constructors

Constructor and Description
Level(LevelSet parent, int levelNumber, double tileDelta) Constructs a Level within a LevelSet.

Method Summary

Modifier and Type	Method and Description
boolean	isFirstLevel() Indicates whether this level is the lowest resolution level (level 0) within the parent level set.
boolean	isLastLevel() Indicates whether this level is the highest resolution level within the parent level set.
Level	nextLevel() Returns the level whose ordinal occurs immediately after this level's ordinal in the parent level set, or null if this is the last level.
Level	previousLevel() Returns the level whose ordinal occurs immediately before this level's ordinal in the parent level set, or null if this is the fist level.

Methods inherited from class java.lang.Object

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

Field Detail

parent

public final LevelSet parent

The LevelSet that this level is a member of.

levelNumber

public final int levelNumber

The level's ordinal in its parent level set.

tileDelta

public final double tileDelta

The geographic width and height in degrees of tiles within this level.

tileWidth

public final int tileWidth

The parent LevelSet's tileWidth.

tileHeight

public final int tileHeight

The parent LevelSet's tileHeight.

texelHeight

public final double texelHeight

The size of pixels or elevation cells within this level, in radians per pixel (or per cell).

Constructor Detail

Level

public Level(LevelSet parent,
             int levelNumber,
             double tileDelta)

Constructs a Level within a LevelSet. Applications typically do not interact with this class.

Parameters:

parent - the level set that this level is a member of

levelNumber - the level's ordinal within its parent level set

tileDelta - the geographic width and height in degrees of tiles within this level

Method Detail

isFirstLevel

public boolean isFirstLevel()

Indicates whether this level is the lowest resolution level (level 0) within the parent level set.

Returns:

true if this level is the lowest resolution in the parent level set, otherwise false

isLastLevel

public boolean isLastLevel()

Indicates whether this level is the highest resolution level within the parent level set.

Returns:

true if this level is the highest resolution in the parent level set, otherwise false

previousLevel

public Level previousLevel()

Returns the level whose ordinal occurs immediately before this level's ordinal in the parent level set, or null if this is the fist level.

Returns:

the previous level, or null if this is the first level

nextLevel

public Level nextLevel()

Returns the level whose ordinal occurs immediately after this level's ordinal in the parent level set, or null if this is the last level.

Returns:

the next level, or null if this is the last level