リファレンス · データの入口（自分で用意した星やディープスカイ天体を、ライセンスと出典つきのソースとして渡し、いま画面にあるのは誰のデータかを示します）
SkyPictureSource型
リファレンスの説明と例は英語です。見出しと目次は日本語です。
A source of a picture of the sky in tiles (a survey, an all-sky photograph): a map source, which uses the family's one map shape. The place is a MapPlace in right ascension and declination, the detail is the pixels across the whole circle
of right ascension, and a tile is an ImageTile. The package draws no all-sky picture yet; the type is the door the picture will come through, and a source of it already works with createTileStore.
インポート
import type { SkyPictureSource } from "@johnmorrisdotca/hoshi-stars/door";定義
type SkyPictureSource = TileSource<MapPlace, number, ImageTile> & {
layer: "sky";
};メンバー
| 名前 | 型 | 説明 |
|---|---|---|
kind | "tiles" | |
info | SourceInfo | |
need | (place: MapPlace, detail: number): readonly string[] | The keys of the tiles a place needs at a detail. Pure: no fetching. |
load | (key: string, signal: AbortSignal): Promise<ImageTile> | Loads one tile. The source may use the network or not; it must stop when the signal aborts. |
bytes | (tile: ImageTile): number | The tile's size in memory, in bytes, for the budget. |
layer | "sky" |
例
import type { SkyPictureSource } from "@johnmorrisdotca/hoshi-stars/door";
const widest = (source: SkyPictureSource): readonly string[] => source.need({ lonMin: 0, lonMax: 360, latMin: -90, latMax: 90 }, 1024);
console.log(typeof widest);function出力（このページを作ったときに実行した結果）
この日本語は、まだ日本語を母語とする方の確認を受けていません。訂正を歓迎します。