private ArrayList<CrystalReceiver> getAllColorConnectedTo(
     CrystalTransmitter te, CrystalElement color, boolean recursive, HashSet<WorldLocation> locs) {
   ArrayList<CrystalReceiver> li = this.getNearbyReceivers(te, color);
   if (recursive) {
     for (CrystalReceiver r : li) {
       WorldLocation loc = new WorldLocation(r.getWorld(), r.getX(), r.getY(), r.getZ());
       if (!locs.contains(loc)) {
         locs.add(loc);
         if (r instanceof CrystalTransmitter) {
           ArrayList<CrystalReceiver> li2 =
               this.getAllColorConnectedTo((CrystalTransmitter) r, color, recursive, locs);
           for (CrystalReceiver r2 : li2) {
             WorldLocation loc2 = new WorldLocation(r.getWorld(), r.getX(), r.getY(), r.getZ());
             if (!locs.contains(loc2)) {
               locs.add(loc2);
               li.add(r2);
             }
           }
         }
       }
     }
   }
   return li;
 }
 ArrayList<CrystalTransmitter> getTransmittersTo(CrystalReceiver r, CrystalElement e) {
   ArrayList<CrystalTransmitter> li = new ArrayList();
   for (WorldLocation c : tiles.keySet()) {
     if (c.dimensionID == r.getWorld().provider.dimensionId) {
       CrystalNetworkTile tile = tiles.get(c);
       if (tile instanceof CrystalTransmitter && r != tile) {
         CrystalTransmitter te = (CrystalTransmitter) tile;
         if (te.canConduct() && te.canTransmitTo(r)) {
           if (e == null || te.isConductingElement(e)) {
             double d = te.getDistanceSqTo(r.getX(), r.getY(), r.getZ());
             // ReikaJavaLibrary.pConsole(e+": "+d+": "+te);
             double send = te.getSendRange();
             double dist = r.getReceiveRange();
             if (d <= Math.min(dist * dist, send * send)) {
               li.add(te);
             }
           }
         }
       }
     }
   }
   return li;
 }