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TileCoordinatesImageryProvider

new Cesium.TileCoordinatesImageryProvider(options)

An ImageryProvider 在切片方案中的每个渲染图块周围绘制一个框,并在其中绘制一个标签,指示图块的 X、Y、级别坐标。这对于调试地形和图像渲染问题非常有用。 that draws a box around every rendered tile in the tiling scheme, and draws a label inside it indicating the X, Y, Level coordinates of the tile. This is mostly useful for debugging terrain and imagery rendering problems.
名称 Name 类型 Type 说明 Description
options TileCoordinatesImageryProvider.ConstructorOptions 可选 optional 描述初始化选项的对象 Object describing initialization options

成员 Members

获取此图像提供程序处于活动状态时要显示的信用。通常,这用于证明图像的来源。 Gets the credit to display when this imagery provider is active. Typically this is used to credit the source of the imagery.
获取当图像提供程序遇到异步错误时引发的事件。通过订阅该事件,您将收到错误通知,并有可能从中恢复。事件监听器传递一个实例 Gets an event that is raised when the imagery 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.
获取一个值,该值指示此图像提供程序提供的图像是否包含 Alpha 通道。如果此属性为 false,则 Alpha 通道(如果存在)将被忽略。如果此属性为 true,则任何没有 Alpha 通道的图像都将被视为其 Alpha 在任何地方都是 1.0。将此属性设置为 false 可减少内存使用量和纹理上传时间。 Gets a value indicating whether or not the images provided by this imagery provider include an alpha channel. If this property is false, an alpha channel, if present, will be ignored. If this property is true, any images without an alpha channel will be treated as if their alpha is 1.0 everywhere. Setting this property to false reduces memory usage and texture upload time.

readonly maximumLevel : number|undefined

获取可以请求的最大详细程度。 Gets the maximum level-of-detail that can be requested.
获取可以请求的最低详细程度。 Gets the minimum level-of-detail that can be requested.
获取此提供者使用的代理。 Gets the proxy used by this provider.
获取此实例提供的图像的矩形(以弧度为单位)。 Gets the rectangle, in radians, of the imagery provided by this instance.
获取图块丢弃策略。如果未定义,则丢弃策略负责通过其 shouldDiscardImage 函数过滤掉“丢失”的图块。如果此函数返回未定义,则不会过滤任何图块。 Gets the tile discard policy. If not undefined, the discard policy is responsible for filtering out "missing" tiles via its shouldDiscardImage function. If this function returns undefined, no tiles are filtered.
获取每个图块的高度(以像素为单位)。 Gets the height of each tile, in pixels.
获取每个图块的宽度(以像素为单位)。 Gets the width of each tile, in pixels.
获取此提供程序使用的切片方案。 Gets the tiling scheme used by this provider.

方法 Methods

getTileCredits(x, y, level)Array.<Credit>

获取显示给定图块时要显示的积分。 Gets the credits to be displayed when a given tile is displayed.
名称 Name 类型 Type 说明 Description
x number 平铺 X 坐标。 The tile X coordinate.
y number 平铺 Y 坐标。 The tile Y coordinate.
level number 瓷砖水平; The tile level;
返回: Returns:
显示图块时要显示的制作人员名单。 The credits to be displayed when the tile is displayed.

pickFeatures(x, y, level, longitude, latitude)undefined

该图像提供程序当前不支持选取要素,因此该函数仅返回 undefined。 Picking features is not currently supported by this imagery provider, so this function simply returns undefined.
名称 Name 类型 Type 说明 Description
x number 平铺 X 坐标。 The tile X coordinate.
y number 平铺 Y 坐标。 The tile Y coordinate.
level number 瓷砖级别。 The tile level.
longitude number 选择要素的经度。 The longitude at which to pick features.
latitude number 选择特征的纬度。 The latitude at which to pick features.
返回: Returns:
未定义,因为不支持挑选。 Undefined since picking is not supported.

requestImage(x, y, level, request)Promise.<HTMLCanvasElement>

请求给定图块的图像。 Requests the image for a given tile.
名称 Name 类型 Type 说明 Description
x number 平铺 X 坐标。 The tile X coordinate.
y number 平铺 Y 坐标。 The tile Y coordinate.
level number 瓷砖级别。 The tile level.
request Request 可选 optional 请求对象。仅供内部使用。 The request object. Intended for internal use only.
返回: Returns:
解析后的图像为 Canvas DOM 对象。 The resolved image as a Canvas DOM object.

类型定义 Type Definitions

Cesium.TileCoordinatesImageryProvider.ConstructorOptions

TileCoordinatesImageryProvider 构造函数的初始化选项 Initialization options for the TileCoordinatesImageryProvider constructor
属性: Properties:
名称 Name 类型 Type Attributes 默认值 Default 说明 Description
tilingScheme TilingScheme <可选> &lt;optional>
新的地理切片方案() new GeographicTilingScheme() 绘制图块的图块方案。 The tiling scheme for which to draw tiles.
ellipsoid Ellipsoid <可选> &lt;optional>
椭球体。如果指定了 tilingScheme,则忽略此参数并使用切片方案的椭球体。如果两个参数均未指定,则使用 WGS84 椭球体。 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.
color Color <可选> &lt;optional>
Color.YELLOW 绘制图块框和标签的颜色。 The color to draw the tile box and label.
tileWidth number <可选> &lt;optional>
256 用于细节级别选择目的的图块宽度。 The width of the tile for level-of-detail selection purposes.
tileHeight number <可选> &lt;optional>
256 用于细节层次选择目的的图块高度。 The height of the tile for level-of-detail selection purposes.
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