TilingScheme
查阅Mars3D API

new Cesium.TilingScheme()
engine/Source/Core/TilingScheme.js 16

A tiling scheme for geometry or imagery on the surface of an ellipsoid. At level-of-detail zero, the coarsest, least-detailed level, the number of tiles is configurable. At level of detail one, each of the level zero tiles has four children, two in each direction. At level of detail two, each of the level one tiles has four children, two in each direction. This continues for as many levels as are present in the geometry or imagery source.
参考:

成员(属性)

ellipsoid : Ellipsoid
engine/Source/Core/TilingScheme.js 30

Gets the ellipsoid that is tiled by the tiling scheme.

projection : MapProjection
engine/Source/Core/TilingScheme.js 48

Gets the map projection used by the tiling scheme.

rectangle : Rectangle
engine/Source/Core/TilingScheme.js 39

Gets the rectangle, in radians, covered by this tiling scheme.

方法

getNumberOfXTilesAtLevel(level) → number
engine/Source/Core/TilingScheme.js 60

Gets the total number of tiles in the X direction at a specified level-of-detail.
参数名称 类型 描述信息
level number The level-of-detail.
返回值:
The number of tiles in the X direction at the given level.

getNumberOfYTilesAtLevel(level) → number
engine/Source/Core/TilingScheme.js 70

Gets the total number of tiles in the Y direction at a specified level-of-detail.
参数名称 类型 描述信息
level number The level-of-detail.
返回值:
The number of tiles in the Y direction at the given level.

positionToTileXY(position, level, result) → Cartesian2
engine/Source/Core/TilingScheme.js 130

Calculates the tile x, y coordinates of the tile containing a given cartographic position.
参数名称 类型 描述信息
position Cartographic The position.
level number The tile level-of-detail. Zero is the least detailed.
result Cartesian2 可选 The instance to which to copy the result, or undefined if a new instance should be created.
返回值:
The specified 'result', or a new object containing the tile x, y coordinates if 'result' is undefined.

rectangleToNativeRectangle(rectangle, result) → Rectangle
engine/Source/Core/TilingScheme.js 84

Transforms a rectangle specified in geodetic radians to the native coordinate system of this tiling scheme.
参数名称 类型 描述信息
rectangle Rectangle The rectangle to transform.
result Rectangle 可选 The instance to which to copy the result, or undefined if a new instance should be created.
返回值:
The specified 'result', or a new object containing the native rectangle if 'result' is undefined.

tileXYToNativeRectangle(x, y, level, result) → Rectangle
engine/Source/Core/TilingScheme.js 100

Converts tile x, y coordinates and level to a rectangle expressed in the native coordinates of the tiling scheme.
参数名称 类型 描述信息
x number The integer x coordinate of the tile.
y number The integer y coordinate of the tile.
level number The tile level-of-detail. Zero is the least detailed.
result object 可选 The instance to which to copy the result, or undefined if a new instance should be created.
返回值:
The specified 'result', or a new object containing the rectangle if 'result' is undefined.

tileXYToRectangle(x, y, level, result) → Rectangle
engine/Source/Core/TilingScheme.js 115

Converts tile x, y coordinates and level to a cartographic rectangle in radians.
参数名称 类型 描述信息
x number The integer x coordinate of the tile.
y number The integer y coordinate of the tile.
level number The tile level-of-detail. Zero is the least detailed.
result object 可选 The instance to which to copy the result, or undefined if a new instance should be created.
返回值:
The specified 'result', or a new object containing the rectangle if 'result' is undefined.
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