If successive points aren't > 50 meters apart in KML realtime tracking, don't count...

diff --git a/kml.c b/kml.c
index 6584de12575b3c068c2723bdcd538f4b19da09d1..aa8a79004ed0593fa48c575edcd434ef8d178cb0 100644 (file)
--- a/kml.c
+++ b/kml.c
@@ -21,6 +21,7 @@
  */
 #include "defs.h"
 #include "xmlgeneric.h"
+#include "grtcirc.h"
 
 #ifdef __WIN32__
 # include <windows.h>
@@ -852,6 +853,16 @@ static void kml_waypt_pr(const waypoint *waypointp)
 {
        const char *icon;
 
+#if 0 // Experimental
+       if(realtime_positioning) {
+               kml_write_xml(1, "<LookAt>\n");
+               kml_write_xml(0, "<longitude>%f</longitude>\n", waypointp->longitude);
+               kml_write_xml(0, "<latitude>%f</latitude>\n", waypointp->latitude);
+               kml_write_xml(0, "<altitude>1000</altitude>\n");
+               kml_write_xml(-1, "</LookAt>\n");
+       }
+#endif
+
        if (waypointp->gc_data.diff && waypointp->gc_data.terr) {
                kml_geocache_pr(waypointp);
                return;
@@ -1117,7 +1128,25 @@ kml_wr_position(waypoint *wpt)
 
        wpt->icon_descr = kml_get_posn_icon(wpt->creation_time - last_valid_fix);
 
-       track_add_wpt(posn_trk_head, waypt_dupe(wpt));
+       
+       /* In order to avoid clutter while we're sitting still, don't add
+          track points if we've not moved a minimum distance from the
+          beginnning of our accumulated track. */
+       {
+       waypoint *newest_posn= (waypoint *) QUEUE_LAST(&posn_trk_head->waypoint_list);
+       
+       if(radtometers(gcdist(RAD(wpt->latitude), RAD(wpt->longitude), 
+               RAD(newest_posn->latitude), RAD(newest_posn->longitude))) > 50) {
+               track_add_wpt(posn_trk_head, waypt_dupe(wpt));
+       } else {
+               /* If we haven't move more than our threshold, pretend 
+                * we didn't move at  all to prevent Earth from jittering 
+                * the zoom levels on us.
+                */
+               wpt->latitude = newest_posn->latitude;
+               wpt->longitude = newest_posn->longitude;
+       }
+       }
 
        waypt_add(wpt);
        kml_write();