Fix a few nits for Jay.

robots/tracker/RoboTrack.java

@@ -468,8 +468,9 @@ public class RoboTrack extends JApplet {
     
     static class MyTableModel extends AbstractTableModel {
         private String[] columnNames = {"Pname", "Vname",
-	                                "X", "Y", "O",
-	                                "DX", "DY", "DO",
+	                                "X (meters)", "Y (meters)",
+					"O (degrees)",
+	                                "Dest-X", "Dest-Y", "Dest-O",
 					"Battery %", "Voltage"
 	};
 	

www/robotrack/robopipe.php3

@@ -61,25 +61,26 @@ if (isset($fake)) {
     return;
 }
 
-$last_stamp = 0;
-
-$base_query_string =
-    "select loc.*,r.pid,r.eid,r.vname, ".
-    "  n.battery_voltage,n.battery_percentage, ".
-    "  n.destination_x,n.destination_y, ".
-    "  n.destination_orientation ".
-    "  from location_info as loc ".
-    "left join reserved as r on r.node_id=loc.node_id ".
-    "left join nodes as n on n.node_id=loc.node_id ".
-    "where loc.building='$building' and ".
-    "      loc.floor='$floor' ";
+$last_stamp   = 0;
 
 # Loop forever.
 while (1) {
     if ($last_stamp) 
-	$query_string = $base_query_string . "and stamp>$last_stamp";
+	$stamp_clause = " and stamp>$last_stamp ";
     else
-	$query_string = $base_query_string;
+	$stamp_clause = "";
+
+    $query_string =
+	"select loc.*,r.pid,r.eid,r.vname, ".
+	"  n.battery_voltage,n.battery_percentage, ".
+	"  n.destination_x,n.destination_y, ".
+	"  n.destination_orientation ".
+	"  from location_info as loc ".
+	"left join reserved as r on r.node_id=loc.node_id ".
+	"left join nodes as n on n.node_id=loc.node_id ".
+	"where loc.building='$building' and ".
+	"      loc.floor='$floor' $stamp_clause ".
+	"order by n.type,n.node_id";
 
     $query_result = DBQueryFatal($query_string);
 

www/robotrack/robotrack.php3

@@ -51,8 +51,11 @@ echo "<table cellspacing=5 cellpadding=5 border=0 class=\"stealth\">
        <td class=stealth>This applet allows you to view the robots
                          as they move around. The table at the bottom
                          shows the current position (x, y, orientation),
-                         the destination position (dx, dy, dorientation),
+                         the destination position,
                          and the battery level (percentage and voltage).
+                         The shaded areas (blue border) are <em>exclusion</em>
+                         zones where robots
+                         are not allowed to go.
         </td>
       </tr>
       </table><hr>\n";