Controling Zombie Speed

I found the following code for controlling Zombie speed, however it seems to be buggy and causes entities (including non-zombies) to teleport around like Enderman. This is for a server running the 1.4 Beta Build #2455.

Code:

package me.blakkdock.zombies;
 
import java.lang.reflect.Field;
 
 
import org.bukkit.craftbukkit.util.UnsafeList;
 
 
import net.minecraft.server.EntityHuman;
import net.minecraft.server.EntityVillager;
import net.minecraft.server.PathfinderGoalBreakDoor;
import net.minecraft.server.PathfinderGoalFloat;
import net.minecraft.server.PathfinderGoalHurtByTarget;
import net.minecraft.server.PathfinderGoalLookAtPlayer;
import net.minecraft.server.PathfinderGoalMeleeAttack;
import net.minecraft.server.PathfinderGoalMoveThroughVillage;
import net.minecraft.server.PathfinderGoalMoveTowardsRestriction;
import net.minecraft.server.PathfinderGoalNearestAttackableTarget;
import net.minecraft.server.PathfinderGoalRandomLookaround;
import net.minecraft.server.PathfinderGoalRandomStroll;
import net.minecraft.server.World;
 
 
public class BlakkEntityZombie extends net.minecraft.server.EntityZombie {
 
    public BlakkEntityZombie(World world) {
        super(world);
        this.bw = 0.28F; //Zombie Speed 
     
 
        try {
            Field gsa = net.minecraft.server.PathfinderGoalSelector.class.getDeclaredField("a");
            gsa.setAccessible(true);
 
            gsa.set(this.goalSelector, new UnsafeList());
            gsa.set(this.targetSelector, new UnsafeList());
        } catch (SecurityException e) {
            e.printStackTrace();
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
 
        this.goalSelector.a(0, new PathfinderGoalFloat(this));
        this.goalSelector.a(1, new PathfinderGoalBreakDoor(this));
        this.goalSelector.a(2, new PathfinderGoalMeleeAttack(this, EntityHuman.class, (float) (this.bw * 1.9f), false)); // this one to attack human
        this.goalSelector.a(3, new PathfinderGoalMeleeAttack(this, EntityVillager.class, (float) this.bw, true));
        this.goalSelector.a(4, new PathfinderGoalMoveTowardsRestriction(this, (float) this.bw));
        this.goalSelector.a(5, new PathfinderGoalMoveThroughVillage(this, (float) this.bw, false));
        this.goalSelector.a(6, new PathfinderGoalRandomStroll(this, (float) this.bw));
        this.goalSelector.a(7, new PathfinderGoalLookAtPlayer(this, EntityHuman.class, 8.0F)); // this one to look at human
        this.goalSelector.a(7, new PathfinderGoalRandomLookaround(this));
        this.targetSelector.a(1, new PathfinderGoalHurtByTarget(this, false));
        this.targetSelector.a(2, new PathfinderGoalNearestAttackableTarget(this, EntityHuman.class, 8.0F, 0, true)); // this one to target human
        this.targetSelector.a(2, new PathfinderGoalNearestAttackableTarget(this, EntityVillager.class, 16.0F, 0, false));
    }
}

Code:

package me.blakkdock.zombies;
 
import java.lang.reflect.Method;
import java.util.logging.Logger;
 
import org.bukkit.Location;
import org.bukkit.World;
import org.bukkit.craftbukkit.CraftWorld;
import org.bukkit.craftbukkit.entity.CraftEntity;
import org.bukkit.entity.EntityType;
import org.bukkit.entity.Entity;
import org.bukkit.event.EventHandler;
import org.bukkit.event.entity.CreatureSpawnEvent;
import org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason;
import org.bukkit.plugin.java.JavaPlugin;
 
import org.bukkit.plugin.PluginDescriptionFile;
 
public class Zombies extends JavaPlugin {
    public final Logger logger = Logger.getLogger("Minecraft");
    public static Zombies plugin;
   
    @Override
    public void onDisable() {
        PluginDescriptionFile pdfFile = this.getDescription();
        this.logger.info(pdfFile.getName() + " Disabled!!");
    }
   
    @Override
    public void onEnable(){
        PluginDescriptionFile pdfFile = this.getDescription();
        this.logger.info(pdfFile.getName() + "V." + pdfFile.getVersion() + " Enabled!!");
       
        try{
            @SuppressWarnings("rawtypes")
            Class[] args = new Class[3];
            args[0] = Class.class;
            args[1] = String.class;
            args[2] = int.class;
 
            Method a = net.minecraft.server.EntityTypes.class.getDeclaredMethod("a", args);
            a.setAccessible(true);
 
            a.invoke(a, BlakkEntityZombie.class, "Zombie", 54);
        }catch (Exception e){
            e.printStackTrace();
            this.setEnabled(false);
        }
    }
   
    @EventHandler
    public void onCreatureSpawn(CreatureSpawnEvent event){
        if (event.isCancelled()) return;
 
        Location location = event.getLocation();
        Entity entity = event.getEntity();
        EntityType creatureType = event.getEntityType();
        World world = location.getWorld();
 
        net.minecraft.server.World mcWorld = ((CraftWorld) world).getHandle();
        net.minecraft.server.Entity mcEntity = (((CraftEntity) entity).getHandle());
 
        if (creatureType == EntityType.ZOMBIE && mcEntity instanceof BlakkEntityZombie == false){
            BlakkEntityZombie blakkEntityZombie = new BlakkEntityZombie(mcWorld);
 
            blakkEntityZombie.setPosition(location.getX(), location.getY(), location.getZ());
 
            mcWorld.removeEntity((net.minecraft.server.EntityZombie) mcEntity);
            mcWorld.addEntity(blakkEntityZombie, SpawnReason.CUSTOM);
 
            return;
        }
    }
}

 

Deathmarine

 

In 1.4, they renamed

Code:

this.bw

to

Code:

this.bI

 

^
|
He's right. Take a look at
https://github.com/Bukkit/CraftBukk...n/java/net/minecraft/server/EntityZombie.java

and

https://github.com/Bukkit/CraftBukk...n/java/net/minecraft/server/EntityLiving.java

OnEnable will overwrite every zombie with your custom Zombie.

Honestly the methods I use now is to just edit the Monster directly and edit freely without having to extend the class. (Also cool for making baby, villager, or Villager Baby Zombies.)
Here is a method Example of something I was working on with all the new 1.4 additions.

Code:

private void superZombie(Zombie z){
        Location loc = z.getLocation();
        EntityZombie zombie = ((CraftZombie) z).getHandle();
try {
      int chance = plugin.gen.nextInt(22);
      if(chance==0){
      if(plugin.gen.nextBoolean())zombie.setBaby(true);
      if(!zombie.isBaby()){
float speed = 0.42F;
//42 and they are REALLY FAST
Field fGoalSelector = EntityLiving.class.getDeclaredField("goalSelector");
      fGoalSelector.setAccessible(true);
      PathfinderGoalSelector gs = new PathfinderGoalSelector(((CraftWorld) loc.getWorld()).getHandle() != null && ((CraftWorld) loc.getWorld()).getHandle().methodProfiler != null ? ((CraftWorld) loc.getWorld()).getHandle().methodProfiler : null);
      gs.a(0, new PathfinderGoalFloat(zombie));
      gs.a(1, new PathfinderGoalBreakDoor(zombie));
      gs.a(2, new PathfinderGoalMeleeAttack(zombie, EntityHuman.class, speed, false));
      gs.a(3, new PathfinderGoalMeleeAttack(zombie, EntityVillager.class, speed, true));
      gs.a(4, new PathfinderGoalMoveTowardsRestriction(zombie, speed));
      gs.a(5, new PathfinderGoalMoveThroughVillage(zombie, speed, false));
      gs.a(6, new PathfinderGoalRandomStroll(zombie, speed));
      gs.a(7, new PathfinderGoalLookAtPlayer(zombie, EntityHuman.class, 15.0F));
      gs.a(7, new PathfinderGoalRandomLookaround(zombie));
      fGoalSelector.set(zombie,gs);
      }
      Material weapon = drop.weaponPicker();
      if(weapon!=null){
      CraftItemStack ci = new CraftItemStack(weapon,1);
      int once=plugin.gen.nextInt(22)+1;
      for(int i=0;i<once;i++){
      Enchantment en = drop.enchant();
      if(en!=null)ci.addUnsafeEnchantment(en, plugin.gen.nextInt(10)+1);
      }
      zombie.setEquipment(0,ci.getHandle());
      }
      if(plugin.gen.nextBoolean()){
      Material helmet = drop.getHelmet();
      if(helmet!=null)zombie.setEquipment(1,new CraftItemStack(helmet,1).getHandle());
      Material chest = drop.getChestPlate();
      if(chest!=null)zombie.setEquipment(2,new CraftItemStack(chest,1).getHandle());
      Material leg = drop.getLeggings();
      if(leg!=null)zombie.setEquipment(3,new CraftItemStack(leg,1).getHandle());
      Material boots = drop.getBoots();
      if(boots!=null)zombie.setEquipment(4,new CraftItemStack(boots,1).getHandle());
      }else{
      Material[] mats = drop.armorPicker();
      if(mats!=null){
      for(int i=0;i<mats.length;i++){
      zombie.setEquipment(i+1, new CraftItemStack(mats[i],1).getHandle());
      }
      }
      }
 
      }
      //0=ItemInHand
} catch (Exception e) {
e.printStackTrace();
}
    }

I won't fill in the variables considering sudo code should point you in the right direction, but that should give you some ideas.

Badass random super zombies.

Sup Man.

 

I just used navigation, because it can be changed on the go. The one problem I see with that is that they move along the path at that speed even if there is a block in front of them for some reason. An example is if there is a block in front of them and it breaks, they zoom forward really fast. I am not really sure about this method though, because it will probably break a lot.