ArrayList<CrystalReceiver> getNearbyReceivers(CrystalTransmitter r, CrystalElement e) {
   ArrayList<CrystalReceiver> li = new ArrayList();
   try {
     for (WorldLocation c : tiles.keySet()) {
       if (c.dimensionID == r.getWorld().provider.dimensionId) {
         CrystalNetworkTile tile = tiles.get(c);
         if (tile instanceof CrystalReceiver && r != tile) {
           CrystalReceiver te = (CrystalReceiver) tile;
           if (te.canConduct() && r.canTransmitTo(te)) {
             if (e == null || te.isConductingElement(e)) {
               double d = te.getDistanceSqTo(r.getX(), r.getY(), r.getZ());
               // ReikaJavaLibrary.pConsole(e+": "+d+": "+te);
               double send = r.getSendRange();
               double dist = te.getReceiveRange();
               if (d <= Math.min(dist * dist, send * send)) {
                 li.add(te);
               }
             }
           }
         }
       }
     }
   } catch (ConcurrentModificationException ex) {
     ex.printStackTrace();
     ChromatiCraft.logger.logError(
         "CME when trying to pathfind on the crystal network. This indicates a deeper issue.");
   }
   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;
 }