Meters are now cleared before joining a server. Fixes bug when moving…

… from RSMM server to non-RSMM server

src/main/java/narcolepticfrog/rsmm/LiteModRedstoneMultimeter.java

@@ -13,7 +13,9 @@
 import net.minecraft.client.renderer.RenderGlobal;
 import net.minecraft.client.settings.KeyBinding;
 import net.minecraft.command.ServerCommandManager;
+import net.minecraft.network.INetHandler;
 import net.minecraft.network.PacketBuffer;
+import net.minecraft.network.play.server.SPacketJoinGame;
 import net.minecraft.util.math.RayTraceResult;
 import org.lwjgl.input.Keyboard;
 
@@ -22,7 +24,7 @@
 import java.util.List;
 
 public class LiteModRedstoneMultimeter implements Tickable, HUDRenderListener, PostRenderListener, PreRenderListener,
-        ServerCommandProvider, PluginChannelListener, RSMMCPacketHandler {
+        ServerCommandProvider, PluginChannelListener, RSMMCPacketHandler, PreJoinGameListener {
 
     private static KeyBinding toggleMeterKey = new KeyBinding("key.redstonemultimeter.toggle", Keyboard.KEY_M, "key.categories.redstonemultimeter");
     private static KeyBinding pauseMetersKey = new KeyBinding("key.redstonemultimeter.pause", Keyboard.KEY_N, "key.categories.redstonemultimeter");
@@ -110,6 +112,12 @@ public void provideCommands(ServerCommandManager commandManager) {
         commandManager.registerCommand(new MeterCommand(rsmmServer));
     }
 
+    @Override
+    public boolean onPreJoinGame(INetHandler netHandler, SPacketJoinGame joinGamePacket) {
+        meters.clear();
+        return true;
+    }
+
     @Override
     public void handleMeter(RSMMCPacketMeter packet) {
         if (packet.shouldCreate()) {
@@ -178,5 +186,4 @@ public void onRenderClouds(float partialTicks, int pass, RenderGlobal renderGlob
     @Override
     public void onRenderTerrain(float partialTicks, int pass) { }
 
-
 }