KBE3D / KBCore / Cesium / EllipsoidTerrainProvider

类: EllipsoidTerrainProvider

A very simple TerrainProvider that produces geometry by tessellating an ellipsoidal surface.

参数

Object with the following properties:

参数

The tiling scheme specifying how the ellipsoidal surface is broken into tiles. If this parameter is not provided, a GeographicTilingScheme is used.

参数

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 default ellipsoid is used.

属性

errorEvent

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.

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credit

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.

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tilingScheme

readonly tilingScheme: GeographicTilingScheme

Gets the tiling scheme used by this provider.

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hasWaterMask

readonly 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.

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hasVertexNormals

readonly hasVertexNormals: boolean

Gets a value indicating whether or not the requested tiles include vertex normals.

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availability

readonly availability: TileAvailability | undefined

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.

方法

requestTileGeometry()

requestTileGeometry(x: number, y: number, level: number, request?: 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

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

The request object. Intended for internal use only.

返回

Promise<TerrainData> | undefined

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.

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getLevelMaximumGeometricError()

getLevelMaximumGeometricError(level: number): number

Gets the maximum geometric error allowed in a tile at a given level.

参数

level

number

The tile level for which to get the maximum geometric error.

返回

number

The maximum geometric error.

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getTileDataAvailable()

getTileDataAvailable(x: number, y: number, level: number): boolean | undefined

Determines whether data for a tile is available to be loaded.

参数

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

boolean | undefined

Undefined if not supported, otherwise true or false.

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loadTileDataAvailability()

loadTileDataAvailability(x: number, y: number, level: number): undefined

Makes sure we load availability data for a tile

参数

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

undefined

This provider does not support loading availability.

构造函数

构造函数

new EllipsoidTerrainProvider(options?: { tilingScheme?: TilingScheme; ellipsoid?: Ellipsoid; }): EllipsoidTerrainProvider

参数

options?

tilingScheme?

TilingScheme

ellipsoid?

Ellipsoid

返回

EllipsoidTerrainProvider