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Hoshi Stars星

The stars you can see without a telescope, with names, colours and distances; the 88 constellations with their lines and boundaries; the Messier objects; and seven map projections to draw them on.

Hoshi is the Japanese word 星 for a star. About the name

Contents

Reference · Names on the brightest stars and the constellation figures as faint lines, for a sky you draw yourself: a count or a magnitude, the figure under the pointer at full strength, a body that covers part of the sky, and a look set by settings alone

StarNamestype

The stars' names for one sky. update picks them for the screen as it is; labels is the answer.

Import it

import type { StarNames } from "@johnmorrisdotca/hoshi-stars/sky-labels";

Definition

interface StarNames {
    readonly settings: Readonly<StarNamesSettings>;
    readonly style: Readonly<LabelStyle>;
    readonly labels: readonly StarNameLabel[];
    set(settings: StarNamesSettings): void;
    update(project: SkyProjector, view: SkyView, covered?: CoverMask): number;
}

Members

NameTypeDescription
settingsReadonly<StarNamesSettings>

The settings in force.

styleReadonly<LabelStyle>

The look in force: complete, with every part in range.

labelsreadonly StarNameLabel[]

The names to draw now, brightest first. The array and the objects in it are reused by the next update.

set(settings: StarNamesSettings): void

Change what is named or how it looks; the next update uses it.

update(project: SkyProjector, view: SkyView, covered?: CoverMask): number

Choose the names for the screen as it is now. Call it when the view, the size or the settings changed; at rest there is nothing to call.

Examples

import type { StarNames } from "@johnmorrisdotca/hoshi-stars/sky-labels";

const count = (names: StarNames): number => names.labels.length;
console.log(typeof count);
function

What it prints (run when this page was built)

View sourceEdit on GitHubMade from the source of @johnmorrisdotca/hoshi-stars 0.47.0.