From d7f9c251a616fdb3f0d1767c6369b9254661ccf4 Mon Sep 17 00:00:00 2001
From: lunaticbum <>
Date: Thu, 10 Oct 2024 11:11:35 +0900
Subject: [PATCH] ,..

---
 .../lunar/launcher/workers/LocationGetter.kt  | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/app/src/main/kotlin/rasel/lunar/launcher/workers/LocationGetter.kt b/app/src/main/kotlin/rasel/lunar/launcher/workers/LocationGetter.kt
index f39360e..b415942 100644
--- a/app/src/main/kotlin/rasel/lunar/launcher/workers/LocationGetter.kt
+++ b/app/src/main/kotlin/rasel/lunar/launcher/workers/LocationGetter.kt
@@ -26,6 +26,7 @@ import java.math.RoundingMode
 import java.util.Locale
 import java.util.concurrent.Executors
 import java.util.concurrent.TimeUnit
+import kotlin.math.cos
 
 class LocationGetter(context: Context, workerParams: WorkerParameters) : BaseGetter(context, workerParams) {
     companion object {
@@ -114,4 +115,27 @@ class LocationGetter(context: Context, workerParams: WorkerParameters) : BaseGet
         }
     }
 
+}
+
+
+val EARTH_RADIUS_METERS = 6371000
+val LATITUDE_DEGREE_PER_METER: Double = 1.0 / (2 * Math.PI * EARTH_RADIUS_METERS / 360)
+
+fun latitudeRange(latitude: Double, radiusInMeters: Int): DoubleArray {
+    val degreeRange = radiusInMeters * LATITUDE_DEGREE_PER_METER
+
+    val minLatitude = latitude - degreeRange
+    val maxLatitude = latitude + degreeRange
+
+    return doubleArrayOf(minLatitude, maxLatitude)
+}
+
+fun longitudeRange(latitude: Double, longitude: Double, radiusInMeters: Int): DoubleArray {
+    val longitudeDegreePerMeter: Double = 360 / (2 * Math.PI * EARTH_RADIUS_METERS * cos(Math.toRadians(latitude)))
+    val degreeRange = longitudeDegreePerMeter * radiusInMeters
+
+    val minLongitude = longitude - degreeRange
+    val maxLongitude = longitude + degreeRange
+
+    return doubleArrayOf(minLongitude, maxLongitude)
 }
\ No newline at end of file