A very simple
TerrainProvider that produces geometry by tessellating an ellipsoidal
surface.
| 参数名称 | 类型 | 描述信息 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
options |
object |
可选
Object with the following properties:
|
参考:
成员(属性)
readonly availability : TileAvailability
Gets an object that can be used to determine availability of terrain from this provider, such as
at points and in rectangles. This property may be undefined if availability
information is not available.
readonly credit : Credit
Gets the credit to display when this terrain provider is active. Typically this is used to credit
the source of the terrain.
readonly 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.
Gets a value indicating whether or not the requested tiles include vertex normals.
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.
readonly tilingScheme : GeographicTilingScheme
Gets the tiling scheme used by this provider.
方法
Gets the maximum geometric error allowed in a tile at a given level.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
level |
number | The tile level for which to get the maximum geometric error. |
返回值:
The maximum geometric error.
Determines whether data for a tile is available to be loaded.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
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. |
返回值:
Undefined if not supported, otherwise true or false.
Makes sure we load availability data for a tile
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
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. |
返回值:
This provider does not support loading availability.
requestTileGeometry(x, y, level, request) → Promise.<TerrainData>|undefined
Requests the geometry for a given tile. The result includes terrain
data and indicates that all child tiles are available.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
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 | 可选 The request object. Intended for internal use only. |
返回值:
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.