X-Git-Url: http://wamblee.org/gitweb/?a=blobdiff_plain;f=gps%2Fsrc%2Forg%2Fwamblee%2Fgps%2Fgeometry%2FCoordinates.java;h=4a9b820d3a7d1caabe5edca5c26f5b62aca884ce;hb=9584bb45a4731bbfccd810b586441d54ea660871;hp=544c92a1f405cd7ff376a26511228b52330b82f3;hpb=b08709beca30891d29b3608a0de36699f2537744;p=utils

diff --git a/gps/src/org/wamblee/gps/geometry/Coordinates.java b/gps/src/org/wamblee/gps/geometry/Coordinates.java
index 544c92a1..4a9b820d 100644
--- a/gps/src/org/wamblee/gps/geometry/Coordinates.java
+++ b/gps/src/org/wamblee/gps/geometry/Coordinates.java
@@ -16,10 +16,12 @@
 
 package org.wamblee.gps.geometry;
 
+import java.io.Serializable;
+
 /**
  * Coordinates in some 3-dimensional coordinate system.  
  */
-public class Coordinates {
+public class Coordinates implements Serializable {
 
     private double _x1; 
     private double _x2; 
@@ -49,6 +51,15 @@ public class Coordinates {
         return _x3; 
     }
     
+    public double getX(int i) { 
+        switch (i) { 
+        case 1: return _x1; 
+        case 2: return _x2;
+        case 3: return _x3;
+        }
+        throw new IllegalArgumentException("coordinate out of range " + i);
+    }
+    
     /* (non-Javadoc)
      * @see java.lang.Object#toString()
      */