Tutorial 1.8.8 Entity WASD Control

1.8.8 WASD Entity Control​

I don't know if there is a tread about this but i'm sorry if there is. I've been working for the past hour / 2 hours getting this bloody entity control down and finally I got it. Ima just leave it here for anyone that wants to be lazy (like I wanted).

This is a pig. Pigs are cool. This can be done with any entity that extends EntityInsentient.

Code:

import java.lang.reflect.Field;

import net.minecraft.server.v1_8_R3.EntityHuman;
import net.minecraft.server.v1_8_R3.EntityInsentient;
import net.minecraft.server.v1_8_R3.EntityLiving;
import net.minecraft.server.v1_8_R3.EntityPig;
import net.minecraft.server.v1_8_R3.GenericAttributes;
import net.minecraft.server.v1_8_R3.MathHelper;
import net.minecraft.server.v1_8_R3.World;

import org.bukkit.Location;
import org.bukkit.craftbukkit.v1_8_R3.CraftWorld;
import org.bukkit.craftbukkit.v1_8_R3.entity.CraftLivingEntity;
import org.bukkit.craftbukkit.v1_8_R3.entity.CraftPig;
import org.bukkit.entity.Pig;
import org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason;

public class RidablePig extends EntityPig{

    protected Field FIELD_JUMP = null;

    public RidablePig(World world) {
        super(world);
   
        if (FIELD_JUMP == null) {
            try {
               FIELD_JUMP = EntityLiving.class.getDeclaredField("aY");
               FIELD_JUMP.setAccessible(true);
            } catch (NoSuchFieldException e) {
                e.printStackTrace();
            }
        }
    }

    @Override
    public void g(float f, float f1) {
        if(this.passenger != null && this.passenger instanceof EntityHuman)
        {
            this.lastYaw = this.yaw = this.passenger.yaw;
            this.pitch = this.passenger.pitch * 0.5F;
            this.setYawPitch(this.yaw, this.pitch);
            this.aK = this.aI = this.yaw;
            f = ((EntityLiving)this.passenger).aZ * 0.5F;
            f1 = ((EntityLiving)this.passenger).ba;

            if(f1 <= 0.0F)
            {
                f1 *= 0.25F;
            }
              try {
                if (FIELD_JUMP.getBoolean(this.passenger) && this.onGround) {
                    this.motY += 1F;
                    this.ai = true;
                    if (f1 > 0.0F)
                    {
                        float f2 = MathHelper.sin(this.yaw * 3.141593F / 180.0F);
                        float f3 = MathHelper.cos(this.yaw * 3.141593F / 180.0F);

                        this.motX += -0.4F * f2 * ((EntityInsentient) this).br();
                        this.motZ += 0.4F * f3 * ((EntityInsentient) this).br();
                    }
                }
            } catch (IllegalArgumentException | IllegalAccessException e) {
                e.printStackTrace();
            }

            this.S = 1.0F; this.aM = this.bI() * 0.1F; if(!this.world.isClientSide)
            {
                this.k((float)this.getAttributeInstance(GenericAttributes.MOVEMENT_SPEED).getValue());
                super.g(f, f1);
            }

            this.aA = this.aB; double d0 = this.locX - this.lastX; double d1 = this.locZ - this.lastZ; float f4 = MathHelper.sqrt(d0 * d0 + d1 * d1) * 4.0F;
            if(f4 > 1.0F)
            {
                f4 = 1.0F;
            }

            this.aB += (f4 - this.aB) * 0.4F; this.aC += this.aB;
        } else {
            this.S = 0.5F; this.aM = 0.02F; super.g(f, f1);
        }
    }

    public static Pig spawn(Location location)
    {
        World mcWorld = (World) ((CraftWorld) location.getWorld()).getHandle();

        RidablePig customEntity = new RidablePig(mcWorld);
        customEntity.setLocation(location.getX(), location.getY(),location.getZ(), location.getYaw(), location.getPitch());

        ((CraftLivingEntity) customEntity.getBukkitEntity()).setRemoveWhenFarAway(false);

        mcWorld.addEntity(customEntity, SpawnReason.CUSTOM);

        customEntity.setCustomName("");
        customEntity.setCustomNameVisible(false);

        return (CraftPig) customEntity.getBukkitEntity();
    }

MAKE SURE YOU REGISTER THE ENTITY

NMS Util (Not mine) :

Code:

/**
* author @BigTeddy98
* Used for tutorial purposes
* https://forums.bukkit.org/threads/tutorial-register-your-custom-entities-nms-reflection.258542/
*/

public class NMSUtils {

    public static void registerEntity(String name, int id, Class<? extends EntityInsentient> nmsClass, Class<? extends EntityInsentient> customClass) {
        try {
            /*
            * First, we make a list of all HashMap's in the EntityTypes class
            * by looping through all fields. I am using reflection here so we
            * have no problems later when minecraft changes the field's name.
            * By creating a list of these maps we can easily modify them later
            * on.
            */
            List<Map<?, ?>> dataMaps = new ArrayList<Map<?, ?>>();
            for (Field f : EntityTypes.class.getDeclaredFields()) {
                if (f.getType().getSimpleName().equals(Map.class.getSimpleName())) {
                    f.setAccessible(true);
                    dataMaps.add((Map<?, ?>) f.get(null));
                }
            }
            /*
            * since minecraft checks if an id has already been registered, we
            * have to remove the old entity class before we can register our
            * custom one
            *
            * map 0 is the map with names and map 2 is the map with ids
            */
            if (dataMaps.get(2).containsKey(id)) {
                dataMaps.get(0).remove(name);
                dataMaps.get(2).remove(id);
            }
            /*
            * now we call the method which adds the entity to the lists in the
            * EntityTypes class, now we are actually 'registering' our entity
            */
            Method method = EntityTypes.class.getDeclaredMethod("a", Class.class, String.class, int.class);
            method.setAccessible(true);
            method.invoke(null, customClass, name, id);
            /*
            * after doing the basic registering stuff , we have to register our
            * mob as to be the default for every biome. This can be done by
            * looping through all BiomeBase fields in the BiomeBase class, so
            * we can loop though all available biomes afterwards. Here, again,
            * I am using reflection so we have no problems later when minecraft
            * changes the fields name
            */
            for (Field f : BiomeBase.class.getDeclaredFields()) {
                if (f.getType().getSimpleName().equals(BiomeBase.class.getSimpleName())) {
                    if (f.get(null) != null) {
                        /*
                        * this peace of code is being called for every biome,
                        * we are going to loop through all fields in the
                        * BiomeBase class so we can detect which of them are
                        * Lists (again, to prevent problems when the field's
                        * name changes), by doing this we can easily get the 4
                        * required lists without using the name (which probably
                        * changes every version)
                        */
                        for (Field list : BiomeBase.class.getDeclaredFields()) {
                            if (list.getType().getSimpleName().equals(List.class.getSimpleName())) {
                                list.setAccessible(true);
                                @SuppressWarnings("unchecked")
                                List<BiomeMeta> metaList = (List<BiomeMeta>) list.get(f.get(null));
                                /*
                                * now we are almost done. This peace of code
                                * we're in now is called for every biome. Loop
                                * though the list with BiomeMeta, if the
                                * BiomeMeta's entity is the one you want to
                                * change (for example if EntitySkeleton matches
                                * EntitySkeleton) we will change it to our
                                * custom entity class
                                */
                                for (BiomeMeta meta : metaList) {
                                    Field clazz = BiomeMeta.class.getDeclaredFields()[0];
                                    if (clazz.get(meta).equals(nmsClass)) {
                                        clazz.set(meta, customClass);
                                    }
                                }
                            }
                        }
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

HOW TO REGISTER:

Code:

NMSUtils.registerEntity(name, id, nmsClass, customClass);

EXAMPLE:

Code:

NMSUtils.registerEntity("Pig", 90, EntityPig.class, RidablePig.class);

SPAWNING:

Code:

Pig pig = RidablePig.spawn(player.getLocation());
pig.setPassenger(p);

FIND IDS HERE:
http://pastebin.com/FzJMBa6J

Credits to things that helped me do it:

• https://bukkit.org/threads/1-8-only-wasd-entity-control.342899/
• https://github.com/DSH105/EchoPet/b...opet/compat/nms/v1_8_R3/entity/EntityPet.java

For people that require more spoon-feeding:

Show Spoiler Hide Spoiler

 

@lewysryan If people are going to be using this, you should really think about using abstraction, and not importing NMS or CB classes directly.

https://bukkit.org/threads/support-multiple-minecraft-versions-with-abstraction-maven.115810/

 

Yeahh.... I'm not doing it for every version as everything changes each time. This was a pain in the ass enough.

 

Just put something about it in the OP maybe.

 

@Mrs. bwfctower He stated 1.8.8. Seeing as I've seen threads for this for other version as well (I don't know if the methods are the same but I'll assume they changed since there is a new thread for the different version), I wouldn't worry about it.

 

@Mrs. bwfctower @teej107 This was made because I couldn't find a 1.8.8 version as the NMS changes each time (pain in the ass). So I looked into the new horse, looked at old posts, combined, tried, tried, tried, self harmed and finally got it to work for 1.8.8. This is not a library or util its simply showing how to do WASD control.

This thread is not for those that don't know basic NMS.

@Mrs. bwfctower
If you want to make a library for all versions be my guest, but I can update the code for my server when I need to. (YAY 1.9 SOON ). I'm sure many people will find this EXTREMELY useful. So instead of telling me what to do, leave my thread alone and say something nice for once and stop hating.

 

Great!!! very helpful.. Thank for sharing...

 

I wouldn't really call this a "tutorial", because you're not teaching anything, you're just giving people the code they need.