Node / meshtastic / Meshtastic-Android / files / core / common / src / commonMain / kotlin / org / meshtastic / core / common / util / LocationUtils.kt

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T8b949e/*

* Copyright (c) 2026 Meshtastic LLC

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <https://www.gnu.org/licenses/>.

*/

Tf0883e@fileTb4b4b4:Te6edf3SuppressTb4b4b4(Ta5d6ff"Ta5d6ffMatchingDeclarationNameTa5d6ff"Tb4b4b4)

Tff7b72package T7ee787org.meshtastic.core.common.util

Tff7b72import T7ee787kotlin.math.PI

Tff7b72import T7ee787kotlin.math.asin

Tff7b72import T7ee787kotlin.math.atan2

Tff7b72import T7ee787kotlin.math.cos

Tff7b72import T7ee787kotlin.math.pow

Tff7b72import T7ee787kotlin.math.sin

Tff7b72import T7ee787kotlin.math.sqrt

Tf0883e@SuppressTb4b4b4(Ta5d6ff"Ta5d6ffMagicNumberTa5d6ff"Tb4b4b4)

Tff7b72object T56d364GPSFormat Tb4b4b4{

Tff7b72fun Td2a8fftoDecTb4b4b4(Te6edf3latitudeTb4b4b4: Tffa657DoubleTb4b4b4, Te6edf3longitudeTb4b4b4: Tffa657DoubleTb4b4b4)Tb4b4b4: Tffa657String Tb4b4b4{

T8b949e// Simple decimal formatting for KMP

Tff7b72fun Te6edf3DoubleTb4b4b4.Td2a8ffformatTb4b4b4(Te6edf3digitsTb4b4b4: Tffa657IntTb4b4b4)Tb4b4b4: Tffa657String Tb4b4b4{

Tff7b72val Te6edf3multiplier Tff7b72= T79c0ff1T79c0ff0.0Tb4b4b4.Te6edf3powTb4b4b4(Te6edf3digitsTb4b4b4)

Tff7b72val Te6edf3rounded Tff7b72= Tb4b4b4(Tff7b72this Tff7b72* Te6edf3multiplierTb4b4b4)Tb4b4b4.Te6edf3toLongTb4b4b4(Tb4b4b4) Tff7b72/ Te6edf3multiplier

Tff7b72return Te6edf3roundedTb4b4b4.Te6edf3toStringTb4b4b4(Tb4b4b4)

Tb4b4b4}

Tff7b72return Ta5d6ff"Tffd700${Te6edf3latitudeTb4b4b4.Te6edf3formatTb4b4b4(T79c0ff5Tb4b4b4)Tffd700}Ta5d6ff, Tffd700${Te6edf3longitudeTb4b4b4.Te6edf3formatTb4b4b4(T79c0ff5Tb4b4b4)Tffd700}Ta5d6ff"

Tb4b4b4}

Tb4b4b4}

Tff7b72private Tff7b72const Tff7b72val Te6edf3EARTH_RADIUS_METERS Tff7b72= T79c0ff6T79c0ff3T79c0ff7T79c0ff1Te6edf3e3

Tf0883e@SuppressTb4b4b4(Ta5d6ff"Ta5d6ffMagicNumberTa5d6ff"Tb4b4b4)

Tff7b72private Tff7b72fun Te6edf3DoubleTb4b4b4.Td2a8fftoRadiansTb4b4b4(Tb4b4b4)Tb4b4b4: Tffa657Double Tff7b72= Tff7b72this Tff7b72* Te6edf3PI Tff7b72/ T79c0ff1T79c0ff8T79c0ff0.0

Tf0883e@SuppressTb4b4b4(Ta5d6ff"Ta5d6ffMagicNumberTa5d6ff"Tb4b4b4)

Tff7b72private Tff7b72fun Te6edf3DoubleTb4b4b4.Td2a8fftoDegreesTb4b4b4(Tb4b4b4)Tb4b4b4: Tffa657Double Tff7b72= Tff7b72this Tff7b72* T79c0ff1T79c0ff8T79c0ff0.0 Tff7b72/ Te6edf3PI

T8b949e/** @return distance in meters along the surface of the earth (ish) */

Tf0883e@SuppressTb4b4b4(Ta5d6ff"Ta5d6ffMagicNumberTa5d6ff"Tb4b4b4)

Tff7b72fun Td2a8fflatLongToMeterTb4b4b4(Te6edf3latitudeATb4b4b4: Tffa657DoubleTb4b4b4, Te6edf3longitudeATb4b4b4: Tffa657DoubleTb4b4b4, Te6edf3latitudeBTb4b4b4: Tffa657DoubleTb4b4b4, Te6edf3longitudeBTb4b4b4: Tffa657DoubleTb4b4b4)Tb4b4b4: Tffa657Double Tb4b4b4{

Tff7b72val Te6edf3lat1 Tff7b72= Te6edf3latitudeATb4b4b4.Te6edf3toRadiansTb4b4b4(Tb4b4b4)

Tff7b72val Te6edf3lon1 Tff7b72= Te6edf3longitudeATb4b4b4.Te6edf3toRadiansTb4b4b4(Tb4b4b4)

Tff7b72val Te6edf3lat2 Tff7b72= Te6edf3latitudeBTb4b4b4.Te6edf3toRadiansTb4b4b4(Tb4b4b4)

Tff7b72val Te6edf3lon2 Tff7b72= Te6edf3longitudeBTb4b4b4.Te6edf3toRadiansTb4b4b4(Tb4b4b4)

Tff7b72val Te6edf3dLat Tff7b72= Te6edf3lat2 Tff7b72- Te6edf3lat1

Tff7b72val Te6edf3dLon Tff7b72= Te6edf3lon2 Tff7b72- Te6edf3lon1

Tff7b72val Te6edf3a Tff7b72= Te6edf3sinTb4b4b4(Te6edf3dLat Tff7b72/ T79c0ff2Tb4b4b4)Tb4b4b4.Te6edf3powTb4b4b4(T79c0ff2Tb4b4b4) Tff7b72+ Te6edf3cosTb4b4b4(Te6edf3lat1Tb4b4b4) Tff7b72* Te6edf3cosTb4b4b4(Te6edf3lat2Tb4b4b4) Tff7b72* Te6edf3sinTb4b4b4(Te6edf3dLon Tff7b72/ T79c0ff2Tb4b4b4)Tb4b4b4.Te6edf3powTb4b4b4(T79c0ff2Tb4b4b4)

Tff7b72val Te6edf3c Tff7b72= T79c0ff2 Tff7b72* Te6edf3asinTb4b4b4(Te6edf3sqrtTb4b4b4(Te6edf3aTb4b4b4)Tb4b4b4)

Tff7b72return Te6edf3EARTH_RADIUS_METERS Tff7b72* Te6edf3c

Tb4b4b4}

T8b949e/**

* Computes the bearing in degrees between two points on Earth.

*

* @param lat1 Latitude of the first point

* @param lon1 Longitude of the first point

* @param lat2 Latitude of the second point

* @param lon2 Longitude of the second point

* @return Bearing between the two points in degrees. A value of 0 means due north.

*/

Tf0883e@SuppressTb4b4b4(Ta5d6ff"Ta5d6ffMagicNumberTa5d6ff"Tb4b4b4)

Tff7b72fun Td2a8ffbearingTb4b4b4(Te6edf3lat1Tb4b4b4: Tffa657DoubleTb4b4b4, Te6edf3lon1Tb4b4b4: Tffa657DoubleTb4b4b4, Te6edf3lat2Tb4b4b4: Tffa657DoubleTb4b4b4, Te6edf3lon2Tb4b4b4: Tffa657DoubleTb4b4b4)Tb4b4b4: Tffa657Double Tb4b4b4{

Tff7b72val Te6edf3lat1Rad Tff7b72= Te6edf3lat1Tb4b4b4.Te6edf3toRadiansTb4b4b4(Tb4b4b4)

Tff7b72val Te6edf3lon1Rad Tff7b72= Te6edf3lon1Tb4b4b4.Te6edf3toRadiansTb4b4b4(Tb4b4b4)

Tff7b72val Te6edf3lat2Rad Tff7b72= Te6edf3lat2Tb4b4b4.Te6edf3toRadiansTb4b4b4(Tb4b4b4)

Tff7b72val Te6edf3lon2Rad Tff7b72= Te6edf3lon2Tb4b4b4.Te6edf3toRadiansTb4b4b4(Tb4b4b4)

Tff7b72val Te6edf3dLon Tff7b72= Te6edf3lon2Rad Tff7b72- Te6edf3lon1Rad

Tff7b72val Te6edf3y Tff7b72= Te6edf3sinTb4b4b4(Te6edf3dLonTb4b4b4) Tff7b72* Te6edf3cosTb4b4b4(Te6edf3lat2RadTb4b4b4)

Tff7b72val Te6edf3x Tff7b72= Te6edf3cosTb4b4b4(Te6edf3lat1RadTb4b4b4) Tff7b72* Te6edf3sinTb4b4b4(Te6edf3lat2RadTb4b4b4) Tff7b72- Te6edf3sinTb4b4b4(Te6edf3lat1RadTb4b4b4) Tff7b72* Te6edf3cosTb4b4b4(Te6edf3lat2RadTb4b4b4) Tff7b72* Te6edf3cosTb4b4b4(Te6edf3dLonTb4b4b4)

Tff7b72val Te6edf3bearing Tff7b72= Te6edf3atan2Tb4b4b4(Te6edf3yTb4b4b4, Te6edf3xTb4b4b4)Tb4b4b4.Te6edf3toDegreesTb4b4b4(Tb4b4b4)

Tff7b72return Tb4b4b4(Te6edf3bearing Tff7b72+ T79c0ff3T79c0ff6T79c0ff0Tb4b4b4) Tff7b72% T79c0ff3T79c0ff6T79c0ff0

Tb4b4b4}