X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=altoslib%2FAltosGreatCircle.java;h=cd5b9636a4bea28957048bc87f2accf7dc6f712d;hp=921356a59f0cc36ae9bfda643b8f300ea423a096;hb=eaf2ee0f498b519d64e1664a2b8c66c52ac1497c;hpb=bf88c5f829ea5d32043431945e862a9f6c96740a

diff --git a/altoslib/AltosGreatCircle.java b/altoslib/AltosGreatCircle.java
index 921356a5..cd5b9636 100644
--- a/altoslib/AltosGreatCircle.java
+++ b/altoslib/AltosGreatCircle.java
@@ -3,7 +3,8 @@
  *
  * 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; version 2 of the License.
+ * the Free Software Foundation; either version 2 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
@@ -15,48 +16,32 @@
  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  */
 
-package org.altusmetrum.altoslib_1;
+package org.altusmetrum.altoslib_13;
 
 import java.lang.Math;
+import java.io.*;
 
-public class AltosGreatCircle {
+public class AltosGreatCircle implements Cloneable {
 	public double	distance;
 	public double	bearing;
+	public double	range;
+	public double	elevation;
 
 	double sqr(double a) { return a * a; }
 
-	static final double rad = Math.PI / 180;
-	static final double earth_radius = 6371.2 * 1000;	/* in meters */
+	public static final double rad = Math.PI / 180;
+	public static final double earth_radius = 6371.2 * 1000;	/* in meters */
 
-	public static final int BEARING_LONG = 0;
-	public static final int BEARING_SHORT = 1;
-	public static final int BEARING_VOICE = 2;
+	public static final int BEARING_LONG = AltosConvert.BEARING_LONG;
+	public static final int BEARING_SHORT = AltosConvert.BEARING_SHORT;
+	public static final int BEARING_VOICE = AltosConvert.BEARING_VOICE;
 
 	public String bearing_words(int length) {
-		String [][] bearing_string = {
-			{
-				"North", "North North East", "North East", "East North East",
-				"East", "East South East", "South East", "South South East",
-				"South", "South South West", "South West", "West South West",
-				"West", "West North West", "North West", "North North West"
-			}, {
-				"N", "NNE", "NE", "ENE",
-				"E", "ESE", "SE", "SSE",
-				"S", "SSW", "SW", "WSW",
-				"W", "WNW", "NW", "NNW"
-			}, {
-				"north", "nor nor east", "north east", "east nor east",
-				"east", "east sow east", "south east", "sow sow east",
-				"south", "sow sow west", "south west", "west sow west",
-				"west", "west nor west", "north west", "nor nor west "
-			}
-		};
-		return bearing_string[length][(int)((bearing / 90 * 8 + 1) / 2)%16];
+		return AltosConvert.bearing_to_words(length, bearing);
 	}
 
-	public AltosGreatCircle (double start_lat, double start_lon,
-				 double end_lat, double end_lon)
-	{
+	public AltosGreatCircle (double start_lat, double start_lon, double start_alt,
+				 double end_lat, double end_lon, double end_alt) {
 		double lat1 = rad * start_lat;
 		double lon1 = rad * -start_lon;
 		double lat2 = rad * end_lat;
@@ -87,15 +72,39 @@ public class AltosGreatCircle {
 				course = 2 * Math.PI-course;
 		}
 		distance = d * earth_radius;
-		bearing = course * 180/Math.PI;
+		if (Double.isNaN(course) || Double.isInfinite(course))
+			bearing = 0;
+		else
+			bearing = course * 180/Math.PI;
+
+		double height_diff = end_alt - start_alt;
+		range = Math.sqrt(distance * distance + height_diff * height_diff);
+		elevation = Math.atan2(height_diff, distance) * 180 / Math.PI;
+	}
+
+	public AltosGreatCircle clone() {
+		AltosGreatCircle n = new AltosGreatCircle();
+
+		n.distance = distance;
+		n.bearing = bearing;
+		n.range = range;
+		n.elevation = elevation;
+		return n;
+	}
+
+	public AltosGreatCircle (double start_lat, double start_lon,
+				 double end_lat, double end_lon) {
+		this(start_lat, start_lon, 0, end_lat, end_lon, 0);
 	}
 
 	public AltosGreatCircle(AltosGPS start, AltosGPS end) {
-		this(start.lat, start.lon, end.lat, end.lon);
+		this(start.lat, start.lon, start.alt, end.lat, end.lon, end.alt);
 	}
 
 	public AltosGreatCircle() {
 		distance = 0;
 		bearing = 0;
+		range = 0;
+		elevation = 0;
 	}
 }