feat: option to simulate gravity

README.md

@@ -35,6 +35,7 @@ When running, you can write a chat message to the terminal to send it by all bot
 `-x` The most minimal run - No listeners, no control, no chat - useful for large amounts of bots for better performance  
 `-t` Set proxy type - SOCKS4 or SOCKS5  
 `-l` Set proxy list file  
+`-g` Try to simulate gravity by falling down  
 `-nicks` Set nicknames file  
 
 ## ⚠ DISCLAIMER

src/main/java/me/creepermaxcz/mcbots/Bot.java

@@ -2,7 +2,10 @@ package me.creepermaxcz.mcbots;
 
 import com.github.steveice10.mc.protocol.MinecraftProtocol;
 import com.github.steveice10.mc.protocol.packet.ingame.clientbound.ClientboundLoginPacket;
+import com.github.steveice10.mc.protocol.packet.ingame.clientbound.entity.player.ClientboundPlayerPositionPacket;
 import com.github.steveice10.mc.protocol.packet.ingame.serverbound.ServerboundChatPacket;
+import com.github.steveice10.mc.protocol.packet.ingame.serverbound.level.ServerboundAcceptTeleportationPacket;
+import com.github.steveice10.mc.protocol.packet.ingame.serverbound.player.*;
 import com.github.steveice10.packetlib.ProxyInfo;
 import com.github.steveice10.packetlib.Session;
 import com.github.steveice10.packetlib.event.session.DisconnectedEvent;
@@ -22,6 +25,10 @@ public class Bot extends Thread {
     private Session client;
     private boolean hasMainListener;
 
+    private double lastX, lastY, lastZ = -1;
+
+    private boolean connected;
+
     public Bot(String nickname, InetSocketAddress address, ProxyInfo proxy) {
         this.nickname = nickname;
         this.address = address;
@@ -41,15 +48,26 @@ public class Bot extends Thread {
                 @Override
                 public void packetReceived(Session session, Packet packet) {
                     if (packet instanceof ClientboundLoginPacket) {
+                        connected = true;
                         Log.info(nickname + " connected");
                         if (Main.joinMessage != null) {
                             sendChat(Main.joinMessage);
                         }
                     }
+                    else if (packet instanceof ClientboundPlayerPositionPacket) {
+                        ClientboundPlayerPositionPacket p = (ClientboundPlayerPositionPacket) packet;
+
+                        lastX = p.getX();
+                        lastY = p.getY();
+                        lastZ = p.getZ();
+
+                        client.send(new ServerboundAcceptTeleportationPacket(p.getTeleportId()));
+                    }
                 }
 
                 @Override
                 public void disconnected(DisconnectedEvent event) {
+                    connected = false;
                     Log.info();
                     Log.info(nickname + " disconnected");
                     Log.info(" -> " + event.getReason());
@@ -83,4 +101,28 @@ public class Bot extends Thread {
     public boolean hasMainListener() {
         return hasMainListener;
     }
+
+    public void fallDown()
+    {
+        if (connected && lastY > 0) {
+            move(0, -0.5, 0);
+        }
+    }
+
+    public void move(double x, double y, double z)
+    {
+        lastX += x;
+        lastY += y;
+        lastZ += z;
+        moveTo(lastX, lastY, lastZ);
+    }
+
+    public void moveTo(double x, double y, double z)
+    {
+        client.send(new ServerboundMovePlayerPosPacket(true, x, y, z));
+    }
+
+    public boolean isConnected() {
+        return connected;
+    }
 }

src/main/java/me/creepermaxcz/mcbots/Main.java

@@ -13,6 +13,8 @@ import java.net.*;
 import java.security.SecureRandom;
 import java.util.ArrayList;
 import java.util.Scanner;
+import java.util.Timer;
+import java.util.TimerTask;
 
 
 public class Main {
@@ -35,6 +37,8 @@ public class Main {
     private static int proxyCount = 0;
     private static ProxyInfo.Type proxyType;
 
+    private static Timer timer = new Timer();
+
     public static void main(String[] args) throws Exception {
 
         Options options = new Options();
@@ -61,6 +65,8 @@ public class Main {
 
         options.addOption("nicks", true, "Path to nicks file with nick on every line");
 
+        options.addOption("g", "gravity", false, "Try to simulate gravity by falling down");
+
         CommandLineParser parser = new DefaultParser();
         CommandLine cmd = null;
 
@@ -283,6 +289,16 @@ public class Main {
             }
         }).start();
 
+        //gravity timer
+        if (cmd.hasOption("g")) {
+            timer.scheduleAtFixedRate(new TimerTask() {
+                @Override
+                public void run() {
+                    bots.forEach(Bot::fallDown);
+                }
+            }, 1000L, 500L);
+        }
+
 
         Scanner scanner = new Scanner(System.in);