Merge branch 'master' of ssh://git.gag.com/scm/git/fw/altos

[fw/altos] / altoslib / AltosTelemetry.java

diff --git a/altoslib/AltosTelemetry.java b/altoslib/AltosTelemetry.java
index 4d50a05933100b0a7552eb89dca2a0d4fbc0d3e4..4c973cd95466519482d88a0d503bc7643589b9f5 100644 (file)
--- a/altoslib/AltosTelemetry.java
+++ b/altoslib/AltosTelemetry.java
@@ -15,7 +15,7 @@
  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  */
 
-package org.altusmetrum.altoslib_5;
+package org.altusmetrum.altoslib_8;
 
 import java.text.*;
 
@@ -114,6 +114,29 @@ public abstract class AltosTelemetry implements AltosStateUpdate {
                return telem;
        }
 
+       public static int extend_height(AltosState state, int height_16) {
+               double  compare_height;
+               int     height = height_16;
+
+               if (state.gps != null && state.gps.alt != AltosLib.MISSING) {
+                       compare_height = state.gps_height();
+               } else {
+                       compare_height = state.height();
+               }
+
+               if (compare_height != AltosLib.MISSING) {
+                       int     high_bits = (int) Math.floor (compare_height / 65536.0);
+
+                       height = (high_bits << 16) | (height_16 & 0xffff);
+
+                       if (Math.abs(height + 65536 - compare_height) < Math.abs(height - compare_height))
+                               height += 65536;
+                       else if (Math.abs(height - 65536 - compare_height) < Math.abs(height - compare_height))
+                               height -= 65536;
+               }
+               return height;
+       }
+
        public static AltosTelemetry parse(String line) throws ParseException, AltosCRCException {
                String[] word = line.split("\\s+");
                int i =0;