Дмитрий Соловьев
c3a1a8b4a1
Capture current PCP architecture notes, service-map prototypes, TGU operations UI/map work, local configuration updates, database helper scripts, and request/sample JSON artifacts.
22 lines
567 B
TypeScript
22 lines
567 B
TypeScript
import type { GeoPoint } from "../model/mapTypes";
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export function pointInPolygon(point: GeoPoint, polygon: GeoPoint[]): boolean {
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if (polygon.length < 3) return false;
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let inside = false;
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for (let i = 0, j = polygon.length - 1; i < polygon.length; j = i++) {
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const pi = polygon[i]!;
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const pj = polygon[j]!;
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const intersects =
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pi.lat > point.lat !== pj.lat > point.lat &&
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point.lon < ((pj.lon - pi.lon) * (point.lat - pi.lat)) / (pj.lat - pi.lat) + pi.lon;
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if (intersects) {
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inside = !inside;
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}
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}
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return inside;
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}
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