| 12345678910111213141516171819202122232425262728 |
- // index.ts
- import { degreesToRadians, radiansToDegrees } from "@turf/helpers";
- import { getCoord } from "@turf/invariant";
- function bearing(start, end, options = {}) {
- if (options.final === true) {
- return calculateFinalBearing(start, end);
- }
- const coordinates1 = getCoord(start);
- const coordinates2 = getCoord(end);
- const lon1 = degreesToRadians(coordinates1[0]);
- const lon2 = degreesToRadians(coordinates2[0]);
- const lat1 = degreesToRadians(coordinates1[1]);
- const lat2 = degreesToRadians(coordinates2[1]);
- const a = Math.sin(lon2 - lon1) * Math.cos(lat2);
- const b = Math.cos(lat1) * Math.sin(lat2) - Math.sin(lat1) * Math.cos(lat2) * Math.cos(lon2 - lon1);
- return radiansToDegrees(Math.atan2(a, b));
- }
- function calculateFinalBearing(start, end) {
- let bear = bearing(end, start);
- bear = (bear + 180) % 360;
- return bear;
- }
- var turf_bearing_default = bearing;
- export {
- bearing,
- turf_bearing_default as default
- };
- //# sourceMappingURL=index.js.map
|