Entity Not Saving On World Unload

[NerdicusUltimus]

I have a new entity, but when I log out of the world, the entity despawns and isn't there when I come back in. I'm using the latest version of forge (I think) and MC 1.4.2.

 

EntityMech.java (without the pointless parts, only the important ones I think)

package nerdicus.fwc;

import java.util.Iterator;
import java.util.List;
import java.util.UUID;

import net.minecraft.src.AxisAlignedBB;
import net.minecraft.src.Block;
import net.minecraft.src.DamageSource;
import net.minecraft.src.Entity;
import net.minecraft.src.EntityBoat;
import net.minecraft.src.EntityPlayer;
import net.minecraft.src.EntityTracker;
import net.minecraft.src.Item;
import net.minecraft.src.Material;
import net.minecraft.src.MathHelper;
import net.minecraft.src.NBTTagCompound;
import net.minecraft.src.NBTTagDouble;
import net.minecraft.src.NBTTagFloat;
import net.minecraft.src.NBTTagList;
import net.minecraft.src.World;
import cpw.mods.fml.common.Side;
import cpw.mods.fml.common.asm.SideOnly;

public class EntityMech extends Entity
{
    private boolean field_70279_a;
    private double field_70276_b;
    private int mechPosRotationIncrements;
    private double mechX;
    private double mechY;
    private double mechZ;
    private double mechYaw;
    private double mechPitch;
    @SideOnly(Side.CLIENT)
    private double velocityX;
    @SideOnly(Side.CLIENT)
    private double velocityY;
    @SideOnly(Side.CLIENT)
    private double velocityZ;

    public EntityMech(World par1World)
    {
        super(par1World);
        this.field_70279_a = true;
        this.field_70276_b = 0.07D;
        this.preventEntitySpawning = true;
        this.setSize(1.5F, 0.6F);
        this.yOffset = this.height / 2.0F;
    }
protected void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
    {
    	par1NBTTagCompound.setTag("Pos", this.newDoubleNBTList(new double[] {this.posX, this.posY + (double)this.ySize, this.posZ}));
        par1NBTTagCompound.setTag("Motion", this.newDoubleNBTList(new double[] {this.motionX, this.motionY, this.motionZ}));
        par1NBTTagCompound.setTag("Rotation", this.newFloatNBTList(new float[] {this.rotationYaw, this.rotationPitch}));
        par1NBTTagCompound.setFloat("FallDistance", this.fallDistance);
        //par1NBTTagCompound.setShort("Fire", (short)this.fire);
        par1NBTTagCompound.setShort("Air", (short)this.getAir());
        par1NBTTagCompound.setBoolean("OnGround", this.onGround);
        par1NBTTagCompound.setInteger("Dimension", this.dimension);
        //if (persistentID != null)
        //{
        //    par1NBTTagCompound.setLong("PersistentIDMSB", persistentID.getMostSignificantBits());
        //    par1NBTTagCompound.setLong("PersistentIDLSB", persistentID.getLeastSignificantBits());
        //}
        //if (customEntityData != null)
        //{
        //    par1NBTTagCompound.setCompoundTag("ForgeData", customEntityData);
        //}
        this.writeEntityToNBT(par1NBTTagCompound);
    }

    /**
     * (abstract) Protected helper method to read subclass entity data from NBT.
     */
    protected void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
    {
    	NBTTagList var2 = par1NBTTagCompound.getTagList("Pos");
        NBTTagList var3 = par1NBTTagCompound.getTagList("Motion");
        NBTTagList var4 = par1NBTTagCompound.getTagList("Rotation");
        this.motionX = ((NBTTagDouble)var3.tagAt(0)).data;
        this.motionY = ((NBTTagDouble)var3.tagAt(1)).data;
        this.motionZ = ((NBTTagDouble)var3.tagAt(2)).data;

        if (Math.abs(this.motionX) > 10.0D)
        {
            this.motionX = 0.0D;
        }

        if (Math.abs(this.motionY) > 10.0D)
        {
            this.motionY = 0.0D;
        }

        if (Math.abs(this.motionZ) > 10.0D)
        {
            this.motionZ = 0.0D;
        }

        this.prevPosX = this.lastTickPosX = this.posX = ((NBTTagDouble)var2.tagAt(0)).data;
        this.prevPosY = this.lastTickPosY = this.posY = ((NBTTagDouble)var2.tagAt(1)).data;
        this.prevPosZ = this.lastTickPosZ = this.posZ = ((NBTTagDouble)var2.tagAt(2)).data;
        this.prevRotationYaw = this.rotationYaw = ((NBTTagFloat)var4.tagAt(0)).data;
        this.prevRotationPitch = this.rotationPitch = ((NBTTagFloat)var4.tagAt(1)).data;
        this.fallDistance = par1NBTTagCompound.getFloat("FallDistance");
        //this.fire = par1NBTTagCompound.getShort("Fire");
        this.setAir(par1NBTTagCompound.getShort("Air"));
        this.onGround = par1NBTTagCompound.getBoolean("OnGround");
        this.dimension = par1NBTTagCompound.getInteger("Dimension");
        this.setPosition(this.posX, this.posY, this.posZ);
        this.setRotation(this.rotationYaw, this.rotationPitch);
        //if (par1NBTTagCompound.hasKey("ForgeData"))
        //{
        //    customEntityData = par1NBTTagCompound.getCompoundTag("ForgeData");
        //}
        //if (par1NBTTagCompound.hasKey("PersistentIDMSB") && par1NBTTagCompound.hasKey("PersistentIDLSB"))
        //{
        //    persistentID = new UUID(par1NBTTagCompound.getLong("PersistentIDMSB"), par1NBTTagCompound.getLong("PersistentIDLSB"));
        //}
        this.readEntityFromNBT(par1NBTTagCompound);
    }

  Sorry about indentation issues

 

FutureWarCraft.java

package nerdicus.fwc; //Change this to your package

import net.minecraft.src.Block;
import net.minecraft.src.EnumCreatureType;
import net.minecraft.src.FurnaceRecipes;
import net.minecraft.src.Item;
import net.minecraft.src.ItemStack;
import net.minecraft.src.ModLoader;
import cpw.mods.fml.common.Mod;
import cpw.mods.fml.common.Mod.Init;
import cpw.mods.fml.common.Mod.Instance;
import cpw.mods.fml.common.event.FMLInitializationEvent;
import cpw.mods.fml.common.network.NetworkMod;
import cpw.mods.fml.common.registry.EntityRegistry;
import cpw.mods.fml.common.registry.GameRegistry;
import cpw.mods.fml.common.registry.LanguageRegistry;

@NetworkMod(clientSideRequired=true, serverSideRequired=false)
@Mod(modid="FWC", name="Future Warcraft", version="Alpha v0.1")

public class FutureWarCraft
{
@Instance
public FutureWarCraft instance;

@Init
public void FWCInit(FMLInitializationEvent initEvent)
{
	EntityRegistry.registerModEntity(EntityMech.class, "FWCMech", EntityRegistry.findGlobalUniqueEntityId(), instance, 50, 50, true);
}

Again, sorry about any possible issues.

 

Any ideas? The entity spawns fine, but it just doesn't save itself. I just copied the boat code and modified it a little bit, but it's not working.

 

If you need any more of the code, I'd be glad to supply it. I've had this problem for about 1.5 months.

[vdvman1]

Try changing the read and write methods in the entity to public

[NerdicusUltimus]

Nope, it still doesn't work. Thanks anyways though!

[VictorZombie]

This happened to me! I solved it by using the proxys system, look for it here:http://wuppy29.blogspot.nl/2012/10/forge-modding-142.html