Class: DiscardMissingTileImagePolicy

DiscardMissingTileImagePolicy

new DiscardMissingTileImagePolicy(options)

A policy for discarding tile images that match a known image containing a "missing" image.
Parameters:
Name Type Description
options Object Object with the following properties:
Properties
Name Type Attributes Default Description
missingImageUrl String The URL of the known missing image.
pixelsToCheck Array.<Cartesian2> An array of Cartesian2 pixel positions to compare against the missing image.
disableCheckIfAllPixelsAreTransparent Boolean <optional>
 false If true, the discard check will be disabled if all of the pixelsToCheck in the missingImageUrl have an alpha value of 0. If false, the discard check will proceed no matter the values of the pixelsToCheck.
Source:

Methods

isReady() → {Boolean}

Determines if the discard policy is ready to process images.
Source:
Returns:
True if the discard policy is ready to process images; otherwise, false.
Type
Boolean

shouldDiscardImage(image) → {Boolean}

Given a tile image, decide whether to discard that image.
Parameters:
Name Type Description
image Image An image to test.
Source:
Throws:
shouldDiscardImage must not be called before the discard policy is ready.
Type
DeveloperError
Returns:
True if the image should be discarded; otherwise, false.
Type
Boolean