WorldWind Kotlin/earth.worldwind.util/LevelSet

LevelSet

Multi-resolution, hierarchical collection of tiles organized into levels of increasing resolution. Applications typically do not interact with this class.

Constructors

LevelSet

constructor(sector: Sector, tileOrigin: Sector, firstLevelDelta: Location, numLevels: Int, tileWidth: Int, tileHeight: Int, levelOffset: Int = 0, firstLevelNumber: Int = 0)

Constructs a level set with specified parameters.

constructor(levelSet: LevelSet)

Constructs a level set with parameters from a specified level set.

constructor(config: LevelSetConfig)

Constructs a level set with parameters from a specified configuration. The configuration's sector must be non-null, its first level delta must be positive, its number of levels must be 1 or more, and its tile width and tile height must be 1 or greater.

Properties

firstLevel

val firstLevel: Level

Returns the first level (the lowest resolution) of this level set.

firstLevelDelta

val firstLevelDelta: Location

The geographic width and height of tiles in the first level (the lowest resolution) of this level set.

lastLevel

val lastLevel: Level

Returns the last level (the highest resolution) of this level set.

levelOffset

val levelOffset: Int

Determines how many levels to skip from retrieving tile data during tile pyramid subdivision.

numLevels

val numLevels: Int

Returns the number of levels in this level set.

sector

val sector: Sector

The sector spanned by this level set.

tileHeight

val tileHeight: Int

The height in pixels of images associated with tiles in this level set, or the number of sample points in the latitudinal direction of elevation tiles associated with this level set.

tileOrigin

val tileOrigin: Sector

Tile origin for this level set

tileWidth

val tileWidth: Int

The width in pixels of images associated with tiles in this level set, or the number of sample points in the longitudinal direction of elevation tiles associated with this level set.

Functions

level

fun level(levelNumber: Int): Level?

Returns the Level for a specified level number.

levelForResolution

fun levelForResolution(resolution: Angle): Level

Returns the level that most closely approximates the specified resolution.

minRelevantLevel

fun minRelevantLevel(maxLevel: Level = lastLevel): Level

Determine the min relevant level for the sector of this level set

tileCount

fun tileCount(sector: Sector, minLevel: Level, maxLevel: Level): Long

Calculates approximate count of tiles in specified sector within specified resolution range