Node / meshtastic / Meshtastic-Android / files / core / model / src / commonMain / kotlin / org / meshtastic / core / model / util / UnitConversions.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/>.

*/

Tff7b72package T7ee787org.meshtastic.core.model.util

Tff7b72import T7ee787kotlin.math.ln

Tff7b72import T7ee787kotlin.math.roundToInt

Tff7b72object T56d364UnitConversions Tb4b4b4{

Tf0883e@SuppressTb4b4b4(Ta5d6ff"Ta5d6ffMagicNumberTa5d6ff"Tb4b4b4)

Tff7b72fun Td2a8ffcelsiusToFahrenheitTb4b4b4(Te6edf3celsiusTb4b4b4: Tffa657FloatTb4b4b4)Tb4b4b4: Tffa657Float Tff7b72= Tb4b4b4(Te6edf3celsius Tff7b72* T79c0ff1.8FTb4b4b4) Tff7b72+ T79c0ff3T79c0ff2

T8b949e/** Formats temperature as a string with the unit suffix. */

Tff7b72fun Te6edf3FloatTb4b4b4.Td2a8fftoTempStringTb4b4b4(Te6edf3isFahrenheitTb4b4b4: Tffa657BooleanTb4b4b4)Tb4b4b4: Tffa657String Tb4b4b4{

Tff7b72if Tb4b4b4(Tff7b72thisTb4b4b4.Te6edf3isNaNTb4b4b4(Tb4b4b4)Tb4b4b4) Tff7b72return Ta5d6ff"Ta5d6ff--Ta5d6ff"

Tff7b72val Te6edf3temp Tff7b72= Tff7b72if Tb4b4b4(Te6edf3isFahrenheitTb4b4b4) Te6edf3celsiusToFahrenheitTb4b4b4(Tff7b72thisTb4b4b4) Tff7b72else Tff7b72this

Tff7b72val Te6edf3unit Tff7b72= Tff7b72if Tb4b4b4(Te6edf3isFahrenheitTb4b4b4) Ta5d6ff"Ta5d6ffFTa5d6ff" Tff7b72else Ta5d6ff"Ta5d6ffCTa5d6ff"

T8b949e// Convoluted calculation due to edge case: rounding negative values.

T8b949e// We round the absolute value using roundToInt() (banker's rounding), then reapply the sign so values

Tff7b72val Te6edf3absoluteTempTb4b4b4: Tffa657Float Tff7b72= Te6edf3kotlinTb4b4b4.Te6edf3mathTb4b4b4.Te6edf3absTb4b4b4(Te6edf3tempTb4b4b4)

Tff7b72val Te6edf3roundedAbsoluteTempTb4b4b4: Tffa657Int Tff7b72= Te6edf3absoluteTempTb4b4b4.Te6edf3roundToIntTb4b4b4(Tb4b4b4)

Tff7b72val Te6edf3isZero Tff7b72= Te6edf3roundedAbsoluteTemp Tff7b72=Tff7b72= T79c0ff0

Tff7b72val Te6edf3isPositive Tff7b72= Te6edf3kotlinTb4b4b4.Te6edf3mathTb4b4b4.Te6edf3signTb4b4b4(Te6edf3tempTb4b4b4) Tff7b72> T79c0ff0

Tff7b72val Te6edf3signTb4b4b4: Tffa657String Tff7b72= Tff7b72if Tb4b4b4(Te6edf3isPositive Tff7b72|Tff7b72| Te6edf3isZeroTb4b4b4) Ta5d6ff"Ta5d6ff" Tff7b72else Ta5d6ff"Ta5d6ff-Ta5d6ff"

Tff7b72return Ta5d6ff"Tffd700$Te6edf3signTffd700$Te6edf3roundedAbsoluteTempTa5d6ff°Tffd700$Te6edf3unitTa5d6ff"

Tb4b4b4}

T8b949e/**

* Calculated the dew point based on the Magnus-Tetens approximation which is a widely used formula for calculating

* dew point temperature.

*/

Tf0883e@SuppressTb4b4b4(Ta5d6ff"Ta5d6ffMagicNumberTa5d6ff"Tb4b4b4)

Tff7b72fun Td2a8ffcalculateDewPointTb4b4b4(Te6edf3tempCelsiusTb4b4b4: Tffa657FloatTb4b4b4, Te6edf3humidityTb4b4b4: Tffa657FloatTb4b4b4)Tb4b4b4: Tffa657Float Tb4b4b4{

Tff7b72val Tb4b4b4(Te6edf3aTb4b4b4, Te6edf3bTb4b4b4) Tff7b72= T79c0ff1T79c0ff7.27f Te6edf3to T79c0ff2T79c0ff3T79c0ff7.7f

Tff7b72val Te6edf3alpha Tff7b72= Tb4b4b4(Te6edf3a Tff7b72* Te6edf3tempCelsiusTb4b4b4) Tff7b72/ Tb4b4b4(Te6edf3b Tff7b72+ Te6edf3tempCelsiusTb4b4b4) Tff7b72+ Te6edf3lnTb4b4b4(Te6edf3humidity Tff7b72/ T79c0ff1T79c0ff0T79c0ff0fTb4b4b4)

Tff7b72return Tb4b4b4(Te6edf3b Tff7b72* Te6edf3alphaTb4b4b4) Tff7b72/ Tb4b4b4(Te6edf3a Tff7b72- Te6edf3alphaTb4b4b4)

Tb4b4b4}

Tb4b4b4}