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quanticsoul4772
07318cc9a4
Wrap longitude differences in annotation proximity checks and nearby-place distances so points across the antimeridian remain close. Original contribution by quanticsoul4772. Co-authored-by: quanticsoul4772 <[email protected]>
16 lines
655 B
JavaScript
16 lines
655 B
JavaScript
import assert from 'node:assert/strict';
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import test from 'node:test';
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import { approximateDistanceM } from './featureGeometry.js';
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test('approximate distance takes the short way round 180°', () => {
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// Lau Islands (-179.0) to Savusavu (179.33): about 178 km apart.
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const across = approximateDistanceM(-17.5, -179.0, -16.78, 179.33);
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assert.ok(across > 150_000 && across < 200_000, String(across));
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assert.equal(
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Math.round(approximateDistanceM(0, 179.9, 0, -179.9)),
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Math.round(approximateDistanceM(0, -0.1, 0, 0.1)),
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);
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// Away from 180° nothing changes.
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assert.equal(Math.round(approximateDistanceM(0, 0, 0, 1)), 111_320);
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});
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