Added configurable Radar offset to the sensors output (#230)

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/RadarScreen.kt

@@ -225,6 +225,7 @@ private fun RadarCard(uiState: RadarState, modifier: Modifier = Modifier) {
                     azimElev = uiState.orientationValues,
                     shouldShowSweep = uiState.shouldShowSweep,
                     shouldUseCompass = uiState.shouldUseCompass,
+                    shouldFlipRadar = uiState.shouldFlipRadar,
                     modifier = Modifier.align(Alignment.Center),
                     sunPosition = uiState.sunPosition,
                     moonPosition = uiState.moonPosition,

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/RadarState.kt

@@ -58,6 +58,7 @@ data class RadarState(
     val satTrack: List<OrbitalPos> = emptyList(),
     val shouldShowSweep: Boolean = false,
     val shouldUseCompass: Boolean = false,
+    val shouldFlipRadar: Boolean = false,
     val sunPosition: CelestialComputer.SunPosition? = null,
     val moonPosition: CelestialComputer.MoonPosition? = null,
     val transceivers: TransceiverSubState = TransceiverSubState(),

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/RadarView.kt

@@ -74,6 +74,7 @@ fun RadarViewCompose(
     azimElev: Pair<Float, Float>,
     shouldShowSweep: Boolean,
     shouldUseCompass: Boolean,
+    shouldFlipRadar: Boolean,
     modifier: Modifier = Modifier,
     sunPosition: CelestialComputer.SunPosition? = null,
     moonPosition: CelestialComputer.MoonPosition? = null,
@@ -125,7 +126,9 @@ fun RadarViewCompose(
             cachedSweepBrush = makeSweepBrush(center, primaryColor)
             cachedSweepColor = primaryColor
         }
-        rotate(if (shouldUseCompass) -azimElev.first else 0f) {
+        val baseRotation = if (shouldUseCompass) -azimElev.first else 0f
+        val rotation = if (shouldFlipRadar) baseRotation + 180f else baseRotation
+        rotate(rotation) {
             if (shouldShowSweep) cachedSweepBrush?.let { drawSweep(center, sweepDegrees, radius, it) }
             drawRadar(radius, radarColor)
             drawElevationLabels(radius, primaryColor, measurer)

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/RadarViewModel.kt

@@ -67,6 +67,8 @@ class RadarViewModel(
 
     private val stationPos = settingsRepo.stationPosition.value
     private val magDeclination = sensorsRepo.getMagDeclination(stationPos)
+    private var compassOffset = settingsRepo.otherSettings.value.radarCompassOffset
+    private var compassOffsetElev = settingsRepo.otherSettings.value.radarCompassOffsetElev
     private var transponders: List<SatRadio> = emptyList()
     private var sstvDecoder: SstvDecoder? = null
     private var sstvRecordingJob: Job? = null
@@ -99,7 +101,8 @@ class RadarViewModel(
         viewModelScope.launch {
             sensorsRepo.enableSensor()
             sensorsRepo.sensorData.collect { data ->
-                val orientationValues = (data.first + magDeclination) to data.second
+                val orientationValues =
+                    (data.first + magDeclination + compassOffset) to (data.second + compassOffsetElev)
                 _uiState.update { it.copy(orientationValues = orientationValues) }
             }
         }
@@ -108,11 +111,14 @@ class RadarViewModel(
     private fun collectSettingsChanges() {
         viewModelScope.launch {
             settingsRepo.otherSettings.collectLatest { settings ->
+                compassOffset = settings.radarCompassOffset
+                compassOffsetElev = settings.radarCompassOffsetElev
                 _uiState.update {
                     it.copy(
                         isUtc = settings.stateOfUtc,
                         shouldShowSweep = settings.stateOfSweep,
-                        shouldUseCompass = settings.stateOfSensors
+                        shouldUseCompass = settings.stateOfSensors,
+                        shouldFlipRadar = settings.radarCompassOffsetElev < 0f
                     )
                 }
             }