From 9bcf8714e537e5f72481f99385734ae1fae2687d Mon Sep 17 00:00:00 2001
From: afischerdev <afischer@dbserv.de>
Date: Tue, 21 Jan 2025 12:14:15 +0100
Subject: [PATCH] added destination ruler

---
 .../src/main/java/btools/util/CheapRuler.java   | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/brouter-util/src/main/java/btools/util/CheapRuler.java b/brouter-util/src/main/java/btools/util/CheapRuler.java
index 7a7dc8f..454b2b9 100644
--- a/brouter-util/src/main/java/btools/util/CheapRuler.java
+++ b/brouter-util/src/main/java/btools/util/CheapRuler.java
@@ -77,4 +77,21 @@ public final class CheapRuler {
     double dlat = (ilat1 - ilat2) * kxky[1];
     return Math.sqrt(dlat * dlat + dlon * dlon); // in m
   }
+
+  public static int[] destination(int lon1, int lat1, double distance, double angle) {
+
+    double[] lonlat2m = getLonLatToMeterScales(lat1);
+    double lon2m = lonlat2m[0];
+    double lat2m = lonlat2m[1];
+    angle = 90. - angle;
+    double st = Math.sin(angle * Math.PI / 180.);
+    double ct = Math.cos(angle * Math.PI / 180.);
+
+    int lon2 = (int) (0.5 + lon1 + ct * distance / lon2m);
+    int lat2 = (int) (0.5 + lat1 + st * distance / lat2m);
+    int[] ret = new int[2];
+    ret[0] = lon2;
+    ret[1] = lat2;
+    return ret;
+  }
 }