Hey guys! I am trying to make a portal. There are 3 custom blocks on each side and in the middle, one block down, there is the a 9x9 hole filled with lava (Kinda like the end-portal in the stronghold). And I can't figure out how to turn the lava blocks to a portal block if the player throws (Q-Button) a netherstar in the lava.

 

I thought maybe I can check the entityitem's position to locate if there is lava or not.. But I never did stuff with EntityItem's or something

so maybe someone can help me? thanks for your support!

Like the twilight forest portal with the flowers. In this case, the flowers are my custom blocks and the water is the lava. The item to summon the

portal is the nether star.

I can't think of a graceful way to do this if you are throwing a vanilla item.  It can be done, but it is a bit ugly.

 

Now, if you create a custom item you are throwing in, then you can have a custom entityitem for that item.  In that custom entityitem you can search for the conditions.  Also you can keep the entity item from going poof on contact with the lava.

 

 

Wait, on second though, look around for entity death event, check if it is an entityitem, then if it is a netherstar, then look for your conditions.  That will probably work and is fairly easy.

Wait, on second though, look around for entity death event, check if it is an entityitem, then if it is a netherstar, then look for your conditions.  That will probably work and is fairly easy.

 

There's no such event.

LivingDeathEvent

is only for living entities (i.e. entities that extend

EntityLivingBase

).

Well so much for my memory. 

 

go with the first option.

So should I make a boolean method to check if the custom blocks are there? And in the method where it will check the contact with lava I will first write an if-Statement and check if the boolean method returns true. If it returns true, I will replace the lava with the portal block..

Hm I was looking at the src of Twilight Forest. He uses a TickHandler.. there he checks the entityItem (i think). Then he calld the method createPortal.. Couldnt understand much of it because it was not deobfuscated.

He is doing it the very involved way I thought of. 

 

Do what I suggested, it will be easier on you.

 

When you see your custom entityitem die (onDeath or something like that), do your search and if it is satisfied, build your portal.

Thanks dude, I think thats what I need for now. Bye, DaryBob

Hey guys! I made a custom entity item! So, if you drop a nether star, its entity item will actually convert to my custom entity item.

I wrote "this.isImmuneToFire = true;" in my custom entity item class. It is immune to fire, but if I check if its in lava, it doesn't call everything..

I used the boolean "isInLava"... So do you have any thoughts of why it doesn't equal to true?

 

Heres my event handler and EntityItem class:

 

Event Handler:

 

 

package netcrafter.mods.event;

 

import net.minecraft.entity.Entity;

import net.minecraft.entity.effect.EntityLightningBolt;

import net.minecraft.entity.item.EntityItem;

import net.minecraft.entity.monster.EntityZombie;

import net.minecraft.init.Items;

import net.minecraft.item.ItemStack;

import net.minecraft.network.play.server.S42PacketCombatEvent.Event;

import net.minecraft.util.MathHelper;

import net.minecraft.world.World;

import net.minecraft.world.storage.WorldInfo;

import net.minecraftforge.event.entity.EntityJoinWorldEvent;

import net.minecraftforge.event.entity.living.LivingDropsEvent;

import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;

import netcrafter.mods.aoto.entity.item.AOTOEntityItem;

import netcrafter.mods.aoto.init.AOTOItems;

import netcrafter.mods.event.item.EntityItemDeathEvent;

import netcrafter.mods.util.Helper;

import akka.actor.ActorSystem.Settings;

 

public class AOTOEventHandler {

 

/*Test code

    @SubscribeEvent

    public void onEntityDrop(LivingDropsEvent event) {

    if(event.entityLiving instanceof EntityZombie) {

    event.entityLiving.dropItem(Items.diamond, 1);

    }

    }

    *///End of test code

   

    @SubscribeEvent

    public void onEntityJoinWorld(EntityJoinWorldEvent event) {

        if( !event.world.isRemote && event.entity instanceof EntityItem && !(event.entity instanceof AOTOEntityItem) ) {

            EntityItem eItem = (EntityItem) event.entity;

            ItemStack stack = eItem.getEntityItem();

            if(eItem.getEntityItem().getItem().getUnlocalizedName().equals(Items.nether_star.getUnlocalizedName())) {

            System.out.println("Its the nether star! Trying to remove it and replace it with another entity item!");

                AOTOEntityItem aEntityItem = new AOTOEntityItem(event.world, eItem, eItem.getEntityItem());

                event.world.spawnEntityInWorld(aEntityItem);

            eItem.setDead();

           

            //Checking if E is dead and A is here.

            if(eItem.isDead && aEntityItem.isEntityAlive()) { System.out.println("E is dead and A is alive"); }

           

                int dx = MathHelper.floor_double(aEntityItem.motionX);

                int dy = MathHelper.floor_double(aEntityItem.motionY);

                int dz = MathHelper.floor_double(aEntityItem.motionZ);

               

            if(aEntityItem.isInLava()) {

            System.out.println("Item is in Lava and died");

                    WorldInfo wInfo = event.world.getWorldInfo();

                event.world.addWeatherEffect(new EntityLightningBolt(event.world, dx, dy, dz));

                    wInfo.setRainTime(1000);

                    wInfo.setThunderTime(1000);

                    wInfo.setRaining(true);

                    wInfo.setThundering(true);

                    aEntityItem.setDead();

                    event.setCanceled(true);

           

            }

            }

        }

    }

}

 

 

 

Entity Item

 

 

import java.lang.reflect.Field;

import java.util.Hashtable;

 

import net.minecraft.block.material.Material;

import net.minecraft.entity.item.EntityItem;

import net.minecraft.item.ItemStack;

import net.minecraft.util.BlockPos;

import net.minecraft.util.DamageSource;

import net.minecraft.util.MathHelper;

import net.minecraft.world.World;

import net.minecraftforge.common.MinecraftForge;

import netcrafter.mods.event.item.EntityItemDeathEvent;

import netcrafter.mods.event.item.EntityItemHurtEvent;

 

public class AOTOEntityItem extends EntityItem {

 

    private DamageSource previousDamageSource;

 

    public AOTOEntityItem(World world) {

        super(world);

    }

 

    public AOTOEntityItem(World world, EntityItem oldEntity, ItemStack stack) {

        super(world, oldEntity.posX, oldEntity.posY, oldEntity.posZ, stack);

        this.motionX = oldEntity.motionX;

        this.motionY = oldEntity.motionY;

        this.motionZ = oldEntity.motionZ;

        //this.age = oldEntity.age; <-- age is now private in 1.8

        this.setPickupDelay(10);

        this.hoverStart = oldEntity.hoverStart;

        this.lifespan = oldEntity.lifespan;

        this.isImmuneToFire = true;

    }

 

}

 

 

 

Thanks to delpi for giving me the suggestion to create the custom entity item class.

I guess this.isImmuneToFire = true is not the best way to make it immune to fire.. It somehow makes the entity item invisible.. If I walk to the block where it its, it pops up again..

You should compare

Item

instances directly (e.g.

someItemStack.getItem() == Items.nether_star

), don't compare their unlocalised names.

I tried this:

 

event.world.isAABBInMaterial(aEntityItem.getBoundingBox(), Material.lava)

 

to check if it is in lava..

 

                if (event.world.isAABBInMaterial(aEntityItem.getBoundingBox(), Material.lava)) {

               

                    int dx = MathHelper.floor_double(aEntityItem.motionX);

                    int dy = MathHelper.floor_double(aEntityItem.motionY);

                    int dz = MathHelper.floor_double(aEntityItem.motionZ);

                    if (((BlockRVPortal)AOTOBlocks.rvPortal).tryToCreatePortal(event.world, dx, dy, dz)) {

                    WorldInfo wInfo = event.world.getWorldInfo();

                    event.world.addWeatherEffect(new EntityLightningBolt(event.world, dx, dy, dz));

                        wInfo.setRainTime(1000);

                        wInfo.setThunderTime(1000);

                        wInfo.setRaining(true);

                        wInfo.setThundering(true);

                        aEntityItem.setDead();

                        event.setCanceled(true);

                    }

                }

 

Still doesn't work.. But if gives me an error if I throw the nether star..

(But it doesn't crash)

 

[18:55:59] [server thread/ERROR] [FML]: Index: 3 Listeners:

[18:55:59] [server thread/ERROR] [FML]: 0: HIGHEST

[18:55:59] [server thread/ERROR] [FML]: 1: ASM: net.minecraftforge.common.ForgeInternalHandler@7fb27a08 onEntityJoinWorld(Lnet/minecraftforge/event/entity/EntityJoinWorldEvent;)V

[18:55:59] [server thread/ERROR] [FML]: 2: NORMAL

[18:55:59] [server thread/ERROR] [FML]: 3: ASM: netcrafter.mods.aoto.event.AOTOEventHandler@4bfb3772 onEntityJoinWorld(Lnet/minecraftforge/event/entity/EntityJoinWorldEvent;)V

[18:55:59] [server thread/FATAL] [FML]: Exception caught executing FutureTask: java.util.concurrent.ExecutionException: java.lang.NullPointerException

java.util.concurrent.ExecutionException: java.lang.NullPointerException

at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.7.0_79]

at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.7.0_79]

at net.minecraftforge.fml.common.FMLCommonHandler.callFuture(FMLCommonHandler.java:715) [FMLCommonHandler.class:?]

at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:727) [MinecraftServer.class:?]

at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:669) [MinecraftServer.class:?]

at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:171) [integratedServer.class:?]

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:540) [MinecraftServer.class:?]

at java.lang.Thread.run(Unknown Source) [?:1.7.0_79]

Caused by: java.lang.NullPointerException

at net.minecraft.world.World.isAABBInMaterial(World.java:2318) ~[World.class:?]

at netcrafter.mods.aoto.event.AOTOEventHandler.onEntityJoinWorld(AOTOEventHandler.java:54) ~[AOTOEventHandler.class:?]

at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_6_AOTOEventHandler_onEntityJoinWorld_EntityJoinWorldEvent.invoke(.dynamic) ~[?:?]

at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:55) ~[ASMEventHandler.class:?]

at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:138) ~[EventBus.class:?]

at net.minecraft.world.World.spawnEntityInWorld(World.java:1230) ~[World.class:?]

at net.minecraft.entity.player.EntityPlayer.joinEntityItemWithWorld(EntityPlayer.java:934) ~[EntityPlayer.class:?]

at net.minecraftforge.common.ForgeHooks.onPlayerTossEvent(ForgeHooks.java:421) ~[ForgeHooks.class:?]

at net.minecraft.entity.player.EntityPlayer.dropOneItem(EntityPlayer.java:854) ~[EntityPlayer.class:?]

at net.minecraft.network.NetHandlerPlayServer.processPlayerDigging(NetHandlerPlayServer.java:513) ~[NetHandlerPlayServer.class:?]

at net.minecraft.network.play.client.C07PacketPlayerDigging.processPacket(C07PacketPlayerDigging.java:53) ~[C07PacketPlayerDigging.class:?]

at net.minecraft.network.play.client.C07PacketPlayerDigging.processPacket(C07PacketPlayerDigging.java:76) ~[C07PacketPlayerDigging.class:?]

at net.minecraft.network.PacketThreadUtil$1.run(PacketThreadUtil.java:24) ~[PacketThreadUtil$1.class:?]

at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.7.0_79]

at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.7.0_79]

at net.minecraftforge.fml.common.FMLCommonHandler.callFuture(FMLCommonHandler.java:714) ~[FMLCommonHandler.class:?]

... 5 more

 

Your right.. I changed it:

if(stack.getItem() == Items.nether_star)

I think that happens if it doesn't hit the lava or something..

Ok.. it happens even if it hits the lava..

Well, I was dumb and put the bounding box in..

But I needed the entity bounding box..

 

Still doesn't work if I throw the item in the lava..

 

is AABB (entity bounding box) In Material (Material.lava)?

The entity of the boats in minecraft does this too with water (Material.water)

 

 

if (event.world.isAABBInMaterial(aEntityItem.getEntityBoundingBox(), Material.lava)) {       

                    int dx = MathHelper.floor_double(aEntityItem.motionX);

                    int dy = MathHelper.floor_double(aEntityItem.motionY);

                    int dz = MathHelper.floor_double(aEntityItem.motionZ);

                    if (((BlockRVPortal)AOTOBlocks.rvPortal).tryToCreatePortal(event.world, dx, dy, dz)) {

                    WorldInfo wInfo = event.world.getWorldInfo();

                    event.world.addWeatherEffect(new EntityLightningBolt(event.world, dx, dy, dz));

                        wInfo.setRainTime(1000);

                        wInfo.setThunderTime(1000);

                        wInfo.setRaining(true);

                        wInfo.setThundering(true);

                        aEntityItem.setDead();

                        event.setCanceled(true);

                    }

[spoiler/]

I don't think this should be in your event handler, since the item usually won't be in lava at the moment it's dropped.

Entity#setOnFireFromLava

will be called when the item is in lava, you should be able to override this to check for the portal activation criteria.

Thanks, Choonster!

 

Got it working now finally..

Is it neccesary to check if the item is in lava?

Because the method is basically being called

if it catches fire of lava..

 

But anyways, thanks very much to delpi and Choonster!

 

 

Is it neccesary to check if the item is in lava?

Because the method is basically being called

if it catches fire of lava..

 

It shouldn't be necessary to check if it's in lava, the method should only be called if it's already known that it is in lava.

Hey guy's, i've found a new problem..

If I throw the nether star into the lava,

it creates the portal, but sometimes

it doesn't check if it is in lava..

So it only creates a portal every

10 times or something..

Any thoughts on why this

is so?

 

Custom Entity Item

 

 

package netcrafter.mods.aoto.entity.item;

 

import java.lang.reflect.Field;

import java.util.Hashtable;

 

import net.minecraft.block.material.Material;

import net.minecraft.entity.Entity;

import net.minecraft.entity.effect.EntityLightningBolt;

import net.minecraft.entity.item.EntityItem;

import net.minecraft.item.ItemStack;

import net.minecraft.util.BlockPos;

import net.minecraft.util.DamageSource;

import net.minecraft.util.MathHelper;

import net.minecraft.world.World;

import net.minecraft.world.storage.WorldInfo;

import net.minecraftforge.common.MinecraftForge;

import netcrafter.mods.aoto.blocks.BlockRVPortal;

import netcrafter.mods.aoto.event.item.EntityItemDeathEvent;

import netcrafter.mods.aoto.event.item.EntityItemHurtEvent;

import netcrafter.mods.aoto.init.AOTOBlocks;

 

public class RVSummonerEntityItem extends EntityItem {

 

    private DamageSource previousDamageSource;

 

    public RVSummonerEntityItem(World world) {

        super(world);

    }

 

    public RVSummonerEntityItem(World world, EntityItem oldEntity, ItemStack stack) {

        super(world, oldEntity.posX, oldEntity.posY, oldEntity.posZ, stack);

        this.motionX = oldEntity.motionX;

        this.motionY = oldEntity.motionY;

        this.motionZ = oldEntity.motionZ;

        //this.age = oldEntity.getAge();

        this.setPickupDelay(60);

        this.hoverStart = oldEntity.hoverStart;

        this.lifespan = oldEntity.lifespan;

        //this.isImmuneToFire = true;

    }

 

    @Override

    public boolean attackEntityFrom(DamageSource dmgSource, float attackPts) {

        return !dmgSource.isFireDamage() && super.attackEntityFrom(dmgSource, attackPts);

    }

   

    @Override

    public void setOnFireFromLava() {

   

        //if (worldObj.isAABBInMaterial(this.getEntityBoundingBox(), Material.lava)) {       

   

        //Get the position of the entity item

            int dx = MathHelper.floor_double(this.getPosition().getX());

            int dy = MathHelper.floor_double(this.getPosition().getY());

            int dz = MathHelper.floor_double(this.getPosition().getZ());

           

            //try to create portal

            if(((BlockRVPortal)AOTOBlocks.rvPortal).tryToCreatePortal(worldObj, dx, dy, dz)) {

            WorldInfo wInfo = worldObj.getWorldInfo();

            worldObj.addWeatherEffect(new EntityLightningBolt(worldObj, dx, dy, dz));

            worldObj.setWorldTime(18000);

                wInfo.setRainTime(18000);

                wInfo.setThunderTime(18000);

                wInfo.setRaining(true);

                wInfo.setThundering(true);

                worldObj.setRainStrength(2);

                worldObj.setThunderStrength(2);

                this.setDead();

            }             

        //}   

    }

}

 

 

 

Portal Block:

 

 

package netcrafter.mods.aoto.blocks;

 

import net.minecraft.block.Block;

import net.minecraft.block.material.Material;

import net.minecraft.block.state.IBlockState;

import net.minecraft.entity.effect.EntityLightningBolt;

import net.minecraft.init.Blocks;

import net.minecraft.util.BlockPos;

import net.minecraft.world.World;

import netcrafter.mods.aoto.init.AOTOBlocks;

 

public class BlockRVPortal extends Block {

 

public BlockRVPortal(Material materialIn) {

super(materialIn);

}

 

public boolean tryToCreatePortal(World world, int dx, int dy, int dz) {

 

    if (isGoodPortalPool(world, dx, dy, dz)) {

      world.addWeatherEffect(new EntityLightningBolt(world, dx, dy, dz));

      System.out.println("Yeah!");

     

      transmuteWaterToPortal(world, dx, dy, dz);

     

      return true;

    }

    return false;

 

  }

 

  public void transmuteWaterToPortal(World world, int dx, int dy, int dz){

    int px = dx;

    int pz = dz;

   

    if (world.getBlockState(new BlockPos(px - 1, dy, pz)).getBlock().getMaterial() == Material.lava) {

      px--;

    }

    if (world.getBlockState(new BlockPos(px, dy, pz - 1)).getBlock().getMaterial() == Material.lava) {

      pz--;

    }

   

    world.setBlockState(new BlockPos(px + 0, dy, pz + 0), AOTOBlocks.rvPortal.getDefaultState());

    world.setBlockState(new BlockPos(px + 1, dy, pz + 0), AOTOBlocks.rvPortal.getDefaultState());

    world.setBlockState(new BlockPos(px + 1, dy, pz + 1), AOTOBlocks.rvPortal.getDefaultState());

    world.setBlockState(new BlockPos(px + 0, dy, pz + 1), AOTOBlocks.rvPortal.getDefaultState());

  }

 

  public boolean isGoodPortalPool(World world, int dx, int dy, int dz) {

    boolean flag = false;

   

    flag |= isGoodPortalPoolStrict(world, dx + 0, dy, dz + 0);

   

    flag |= isGoodPortalPoolStrict(world, dx - 1, dy, dz - 1);

    flag |= isGoodPortalPoolStrict(world, dx + 0, dy, dz - 1);

    flag |= isGoodPortalPoolStrict(world, dx + 1, dy, dz - 1);

   

    flag |= isGoodPortalPoolStrict(world, dx - 1, dy, dz + 0);

    flag |= isGoodPortalPoolStrict(world, dx + 1, dy, dz + 0);

   

    flag |= isGoodPortalPoolStrict(world, dx - 1, dy, dz + 1);

    flag |= isGoodPortalPoolStrict(world, dx + 0, dy, dz + 1);

    flag |= isGoodPortalPoolStrict(world, dx + 1, dy, dz + 1);

   

    return flag;

  }

 

  public boolean isGoodPortalPoolStrict(World world, int dx, int dy, int dz) {

    boolean flag = true;

 

    flag &= world.getBlockState(new BlockPos(dx + 0, dy, dz + 0)).getBlock().getMaterial() == Material.lava;

    flag &= world.getBlockState(new BlockPos(dx + 1, dy, dz + 0)).getBlock().getMaterial() == Material.lava;

    flag &= world.getBlockState(new BlockPos(dx + 1, dy, dz + 1)).getBlock().getMaterial() == Material.lava;

    flag &= world.getBlockState(new BlockPos(dx + 0, dy, dz + 1)).getBlock().getMaterial() == Material.lava;

   

    flag &= isGrassOrDirt(world, dx - 1, dy, dz - 1);

    flag &= isGrassOrDirt(world, dx - 1, dy, dz + 0);

    flag &= isGrassOrDirt(world, dx - 1, dy, dz + 1);

    flag &= isGrassOrDirt(world, dx - 1, dy, dz + 2);

   

    flag &= isGrassOrDirt(world, dx + 0, dy, dz - 1);

    flag &= isGrassOrDirt(world, dx + 1, dy, dz - 1);

   

    flag &= isGrassOrDirt(world, dx + 0, dy, dz + 2);

    flag &= isGrassOrDirt(world, dx + 1, dy, dz + 2);

   

    flag &= isGrassOrDirt(world, dx + 2, dy, dz - 1);

    flag &= isGrassOrDirt(world, dx + 2, dy, dz + 0);

    flag &= isGrassOrDirt(world, dx + 2, dy, dz + 1);

    flag &= isGrassOrDirt(world, dx + 2, dy, dz + 2);

   

    flag &= world.getBlockState(new BlockPos(dx + 0, dy - 1, dz + 0)).getBlock().getMaterial().isSolid();

    flag &= world.getBlockState(new BlockPos(dx + 1, dy - 1, dz + 0)).getBlock().getMaterial().isSolid();

    flag &= world.getBlockState(new BlockPos(dx + 1, dy - 1, dz + 1)).getBlock().getMaterial().isSolid();

    flag &= world.getBlockState(new BlockPos(dx + 0, dy - 1, dz + 1)).getBlock().getMaterial().isSolid();

   

    flag &= isNatureBlock(world, dx - 1, dy + 1, dz - 1);

    flag &= isNatureBlock(world, dx - 1, dy + 1, dz + 0);

    flag &= isNatureBlock(world, dx - 1, dy + 1, dz + 1);

    flag &= isNatureBlock(world, dx - 1, dy + 1, dz + 2);

   

    flag &= isNatureBlock(world, dx + 0, dy + 1, dz - 1);

    flag &= isNatureBlock(world, dx + 1, dy + 1, dz - 1);

   

    flag &= isNatureBlock(world, dx + 0, dy + 1, dz + 2);

    flag &= isNatureBlock(world, dx + 1, dy + 1, dz + 2);

   

    flag &= isNatureBlock(world, dx + 2, dy + 1, dz - 1);

    flag &= isNatureBlock(world, dx + 2, dy + 1, dz + 0);

    flag &= isNatureBlock(world, dx + 2, dy + 1, dz + 1);

    flag &= isNatureBlock(world, dx + 2, dy + 1, dz + 2);

   

    return flag;

  }

 

  public boolean isNatureBlock(World world, int dx, int dy, int dz) {

    Block block = world.getBlockState(new BlockPos(dx, dy, dz)).getBlock();

    if (block == AOTOBlocks.red_void_blocks)  {

 

      return true;

    }

    return false;

  }

 

  public void func_149695_a(World world, int x, int y, int z, Block notUsed)

  {

    boolean good = true;

    if (world.getBlockState(new BlockPos(x - 1, y, z)) == this) {

      good &= isGrassOrDirt(world, x + 1, y, z);

    } else if (world.getBlockState(new BlockPos(x + 1, y, z)) == this) {

      good &= isGrassOrDirt(world, x - 1, y, z);

    } else {

      good = false;

    }

    if (world.getBlockState(new BlockPos(x, y, z - 1)) == this) {

      good &= isGrassOrDirt(world, x, y, z + 1);

    } else if (world.getBlockState(new BlockPos(x, y, z + 1)) == this) {

      good &= isGrassOrDirt(world, x, y, z - 1);

    } else {

      good = false;

    }

    if (!good) {

      world.setBlockState(new BlockPos(x, y, z), Blocks.lava.getDefaultState());

    }

  }

 

  protected boolean isGrassOrDirt(World world, int dx, int dy, int dz) {

    return (world.getBlockState(new BlockPos(dx, dy, dz)).getBlock() == Blocks.obsidian);

  }

 

}