createFigureLines関数
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。
The constellation figures as lines for a sky of your own, faint, with the figure under the pointer at full strength and its name. strength 0 draws nothing. The figures are the package's own, from the positions of the stars:
the 88 of the IAU, or with culture a sky culture's (the Japanese sky's 昴, the Chinese sky's mansions and asterisms).
After the first call nothing is allocated by update or point (a new culture in set makes its figures once).
インポート
import { createFigureLines } from "@johnmorrisdotca/hoshi-stars/sky-labels";
定義
function createFigureLines(settings?: FigureLinesSettings): FigureLines
引数
| 名前 | 型 | 説明 |
|---|---|---|
settings (省略可) | FigureLinesSettings | The strength and what a pick needs. |
戻り値
FigureLines
The figures for this sky.
例
例 1
import { createFigureLines } from "@johnmorrisdotca/hoshi-stars/sky-labels";
const lines = createFigureLines({ strength: 0.2 });
const project = (ra: number, dec: number, out: { x: number; y: number }): boolean => {
out.x = 640 - (ra - 84) * 8;
out.y = 360 - dec * 8;
return Math.abs(ra - 84) < 60 && Math.abs(dec) < 40;
};
lines.update(project, { width: 1280, height: 720 });
lines.point(640, 360);
console.log(lines.count > 0, lines.picked?.abbreviation, lines.opacityOf(lines.picked!));true Ori 1出力(このページを作ったときに実行した結果)
例 2
import { createFigureLines } from "@johnmorrisdotca/hoshi-stars/sky-labels";
import { japanese } from "@johnmorrisdotca/hoshi-stars/cultures/japanese";
// the Japanese sky, its names in Japanese: the Pleiades are 昴, named by their reading
const lines = createFigureLines({ culture: japanese, lang: "ja" });
const project = (ra: number, dec: number, out: { x: number; y: number }): boolean => {
out.x = 640 - (ra - 56.9) * 40;
out.y = 360 - (dec - 24.1) * 40;
return Math.abs(ra - 56.9) < 15 && Math.abs(dec - 24.1) < 9;
};
lines.update(project, { width: 1280, height: 720 });
const subaru = lines.figures.find((figure) => figure.abbreviation === "subaru")!;
lines.point(lines.segments[subaru.start * 4]!, lines.segments[subaru.start * 4 + 1]!);
console.log(lines.picked?.abbreviation, lines.name?.text);subaru すばる出力(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。