Fix connectedByPaint floodfill

Author: TheApplePieGod

engine/src/main/battlecode/world/GameWorld.java

@@ -695,21 +695,21 @@ public InternalRobot[] getAllRobots(Team team) {
         return returnRobots.toArray(new InternalRobot[returnRobots.size()]);
     }
 
-    public boolean connectedByPaint(MapLocation loc1, MapLocation loc2) {
-        if(getPaint(loc1) == 0 || getPaint(loc2) == 0 || teamFromPaint(getPaint(loc1)) != teamFromPaint(getPaint(loc2))) return false;
-        Team t = teamFromPaint(getPaint(loc1));
+    public boolean connectedByPaint(Team t, MapLocation robotLoc, MapLocation towerLoc) {
+        if (teamFromPaint(getPaint(robotLoc)) != t)
+            return false;
         Queue<MapLocation> q = new LinkedList<MapLocation>();
         Set<MapLocation> vis = new HashSet<MapLocation>();
-        q.add(loc1);
+        q.add(robotLoc);
         MapLocation cur;
         int[] dx = {1, 0, -1, 0}, dy = {0, 1, 0, -1};
         while(!q.isEmpty()) {
             cur = q.peek();
             q.remove();
-            if(getGameMap().onTheMap(cur) || vis.contains(cur) || teamFromPaint(getPaint(cur)) != t) continue;
-            vis.add(cur);
-            if(cur == loc2)
+            if(cur.equals(towerLoc))
                 return true;
+            if(!getGameMap().onTheMap(cur) || vis.contains(cur) || teamFromPaint(getPaint(cur)) != t) continue;
+            vis.add(cur);
             for(int i = 0; i < 4; i ++)
                 q.add(new MapLocation(cur.x + dx[i], cur.y + dy[i]));
         }

engine/src/main/battlecode/world/RobotControllerImpl.java

@@ -944,7 +944,10 @@ private void assertCanSendMessage(MapLocation loc, Message message) throws GameA
         if (this.robot.getLocation().distanceSquaredTo(loc) > GameConstants.MESSAGE_RADIUS_SQUARED){
             throw new GameActionException(CANT_DO_THAT, "Location specified is not within the message radius!");
         }
-        if (!this.gameWorld.connectedByPaint(this.robot.getLocation(), loc)){
+
+        MapLocation robotLoc = this.robot.getType().isTowerType() ? loc : this.robot.getLocation();
+        MapLocation towerLoc = this.robot.getType().isTowerType() ? this.robot.getLocation() : loc;
+        if (!this.gameWorld.connectedByPaint(this.robot.getTeam(), robotLoc, towerLoc)){
             throw new GameActionException(CANT_DO_THAT, "Location specified is not connected to current location by paint!");
         }
     }
@@ -956,6 +959,7 @@ public boolean canSendMessage(MapLocation loc, int messageContent) {
             assertCanSendMessage(loc, message);
             return true;
         } catch (GameActionException e) {
+            //System.out.println(e);
             return false;
         }
     }

example-bots/src/main/examplefuncsplayer/RobotPlayer.java

@@ -131,6 +131,12 @@ else if (robotType == 2 && rc.canBuildRobot(UnitType.SPLASHER, nextLoc)){
             // System.out.println("BUILT A SPLASHER");
             rc.setIndicatorString("SPLASHER NOT IMPLEMENTED YET");
         }
+
+        // Read incoming messages
+        Message[] messages = rc.readMessages(-1);
+        for (Message m : messages) {
+            System.out.println("Tower received message: '#" + m.getSenderID() + " " + m.getBytes());
+        }
     }