EllipsoidTerrainProvider

new Cesium.EllipsoidTerrainProvider(options)

A very simple TerrainProvider that produces geometry by tessellating an ellipsoidal surface.
Name Type Description
options Object optional Object with the following properties:
Name Type Description
tilingScheme TilingScheme optional The tiling scheme specifying how the ellipsoidal surface is broken into tiles. If this parameter is not provided, a GeographicTilingScheme is used.
ellipsoid Ellipsoid optional The ellipsoid. If the tilingScheme is specified, this parameter is ignored and the tiling scheme's ellipsoid is used instead. If neither parameter is specified, the WGS84 ellipsoid is used.
See:

Members

credit : Credit

Gets the credit to display when this terrain provider is active. Typically this is used to credit the source of the terrain. This function should not be called before EllipsoidTerrainProvider#ready returns true.

errorEvent : Event

Gets an event that is raised when the terrain provider encounters an asynchronous error. By subscribing to the event, you will be notified of the error and can potentially recover from it. Event listeners are passed an instance of TileProviderError.

hasVertexNormals : Boolean

Gets a value indicating whether or not the requested tiles include vertex normals. This function should not be called before EllipsoidTerrainProvider#ready returns true.

hasWaterMask : Boolean

Gets a value indicating whether or not the provider includes a water mask. The water mask indicates which areas of the globe are water rather than land, so they can be rendered as a reflective surface with animated waves. This function should not be called before EllipsoidTerrainProvider#ready returns true.

isCreateSkirt : Boolean

获取或者设置是否创建裙边，裙边用于规避地形裂缝问题，默认true正常显示，反之false关闭。

isCreateSkirt : Boolean

获取和设置地形裙边是否创建显示，默认true显示，false关闭。

isShowGlobe : Boolean

获取或者设置是否剔除无效地形区域（用于TIN地形），默认为true，全球显示。

ready : Boolean

Gets a value indicating whether or not the provider is ready for use.

readonlyreadyPromise : Promise.<Boolean>

Gets a promise that resolves to true when the provider is ready for use.

tilingScheme : GeographicTilingScheme

Gets the tiling scheme used by this provider. This function should not be called before EllipsoidTerrainProvider#ready returns true.

Methods

getLevelMaximumGeometricError(level) → Number

Gets the maximum geometric error allowed in a tile at a given level.
Name Type Description
level Number The tile level for which to get the maximum geometric error.
Returns:
The maximum geometric error.

getTileDataAvailable(x, y, level) → Boolean

Determines whether data for a tile is available to be loaded.
Name Type Description
x Number The X coordinate of the tile for which to request geometry.
y Number The Y coordinate of the tile for which to request geometry.
level Number The level of the tile for which to request geometry.
Returns:
Undefined if not supported, otherwise true or false.

requestTileGeometry(x, y, level, request) → Promise.<TerrainData>|undefined

Requests the geometry for a given tile. This function should not be called before TerrainProvider#ready returns true. The result includes terrain data and indicates that all child tiles are available.
Name Type Description
x Number The X coordinate of the tile for which to request geometry.
y Number The Y coordinate of the tile for which to request geometry.
level Number The level of the tile for which to request geometry.
request Request optional The request object. Intended for internal use only.
Returns:
A promise for the requested geometry. If this method returns undefined instead of a promise, it is an indication that too many requests are already pending and the request will be retried later.