DiscardEmptyTileImagePolicy
查阅Mars3D API

new Cesium.DiscardEmptyTileImagePolicy()
engine/Source/Scene/DiscardEmptyTileImagePolicy.js 13

A policy for discarding tile images that contain no data (and so aren't actually images). This policy discards DiscardEmptyTileImagePolicy.EMPTY_IMAGE, which is expected to be used in place of any empty tile images by the image loading code.
参考:

成员(属性)

static readonly Cesium.DiscardEmptyTileImagePolicy.EMPTY_IMAGE : HTMLImageElement
engine/Source/Scene/DiscardEmptyTileImagePolicy.js 42

Default value for representing an empty image.

方法

isReady() → boolean
engine/Source/Scene/DiscardEmptyTileImagePolicy.js 19

Determines if the discard policy is ready to process images.
返回值:
True if the discard policy is ready to process images; otherwise, false.

shouldDiscardImage(image) → boolean
engine/Source/Scene/DiscardEmptyTileImagePolicy.js 29

Given a tile image, decide whether to discard that image.
参数名称 类型 描述信息
image HTMLImageElement An image to test.
返回值:
True if the image should be discarded; otherwise, false.
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