World Type Nether

[Gaprosys]

Hello,

I have I mod which adds a world type for starting and staying in the nether. The player respawns there. I want to set the players spawn location to a uncovered netherrack block, but the methods return always the highest block, which is bedrock. In 1.7.10 I used world.provider.getEntrancePortalLocation().

Is there any way to do this in 1.9.4?

[Matryoshika]

I'm guessing that you are using a WorldProvider. Override  WorldProvider#getSpawnPoint(), to return a suitable spawn-point. Checking if it is suitable, you'd best create another method that checks in blocks through x, y & z coords in for-loops.

 

As far as I can see, the WorldProvider no longer provides anything like the getEntrancePortalLocation method, and the Teleporter#makePortal method checks for suitable locations directly.

 

I'm forcing a spawn-point to an already cleared area here: https://github.com/Matryoshika/Underworld/blob/master/src/main/java/se/Matryoshika/Underworld/WorldGen/WorldProviderCaves.java#L41

Bit messy, but been meaning to clear it up since I managed to figure out how to force a spawn-point.

[Gaprosys]

Thanks! That helped.

Yes, I'm using a own world provider to change the respawn dimension etc.

My other problem with this world type is that every time the player creates a new world he starts in the overworld.

This seems to be standard so I wrote a method which is called by the net.minecraftforge.event.entity.EntityJoinWorldEvent:

In this method the player is send to the nether with the player.changeDimension(-1) method and it crashes every first time of a world. After the first time the player spawns correct.

 

I think that might is a "hard" teleport so that the dimension change doesn't get properly done.

[Matryoshika]

What is the cause of the crash? Nullpointer?

What is your exact code for sending the player to the Nether?

 

 

[Gaprosys]

The cause of the crash is a Ticking Memory Exception.

The Code for my World Handler first spawn event method:

 

package mod.nethertweaks.world;

import java.io.*;

import mod.chaust.ChaustItems;
import mod.nethertweaks.BucketLoader;
import mod.nethertweaks.Config;
import mod.nethertweaks.ForgeSubscribe;
import mod.nethertweaks.RecipeLoader;
import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.client.Minecraft;
import net.minecraft.client.entity.EntityPlayerSP;
import net.minecraft.entity.EnumCreatureType;
import net.minecraft.entity.passive.EntityAnimal;
import net.minecraft.entity.passive.EntityCow;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.EntityPlayerMP;
import net.minecraft.init.Blocks;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.server.MinecraftServer;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.DimensionType;
import net.minecraft.world.World;
import net.minecraft.world.WorldProvider;
import net.minecraft.world.WorldProviderEnd;
import net.minecraft.world.WorldProviderHell;
import net.minecraft.world.WorldProviderSurface;
import net.minecraft.world.WorldType;
import net.minecraft.world.gen.layer.GenLayer;
import net.minecraftforge.common.DimensionManager;
import net.minecraftforge.event.entity.EntityJoinWorldEvent;
import net.minecraftforge.event.entity.living.LivingSpawnEvent;
import net.minecraftforge.event.terraingen.WorldTypeEvent;
import net.minecraftforge.event.terraingen.BiomeEvent.GetWaterColor;
import net.minecraftforge.event.world.WorldEvent;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;

public class WorldHandler{
     
    boolean isHellworldType;
         
    @SubscribeEvent
    public void changeDimensionByWorldType(WorldTypeEvent event) throws IOException, FileNotFoundException, ArrayIndexOutOfBoundsException {
         
        if(event.getWorldType() instanceof WorldTypeHellworld) {
             
            this.isHellworldType = true;
             
            DimensionManager.unregisterDimension(0);
            DimensionType.register("Overworld", "Provider", 0, WorldProviderSurfaceNTM.class, true);
            DimensionManager.registerDimension(0, DimensionType.getById(0));
             
            DimensionManager.unregisterDimension(-1);
            DimensionType.register("Nether", "Provider", -1, WorldProviderNetherNTM.class, true);
            DimensionManager.registerDimension(-1, DimensionType.getById(-1));
             
            DimensionManager.unregisterDimension(1);
            DimensionType.register("End", "Provider", 1, WorldProviderEndNTM.class, true);
            DimensionManager.registerDimension(1, DimensionType.getById(1));
             
        }
         
    }    
    
    
    @ForgeSubscribe
    @SubscribeEvent
    public void perfectJoin(net.minecraftforge.event.entity.EntityJoinWorldEvent event){
    if(event.getEntity() instanceof EntityPlayer){
    EntityPlayer player = (EntityPlayer) event.getEntity();
       if(player.dimension != -1 && isHellworldType == true) {
       
       	//player.preparePlayerToSpawn();
           player.changeDimension(-1);
       }
   
   	if(isHellworldType == false){
           
       	if(player.dimension == 0){
       	player.changeDimension(Config.nethDim);
       	}
       	if(player.dimension == 1){
       	player.changeDimension(Config.endDim);
       	}
       }
    }
    }
     
}

 

Crashlog

 

http://pastebin.com/6i21c8ar

[Animefan8888]

The error is happening in your Teleporter class on line 134/38

[Ugdhar]

The error is happening in your Teleporter class on line 134/38

 

Isn't that referencing the Vanilla Teleporter class?

 

Also, to the OP, it's more helpful if you upload your code to github so we can see line numbers and such.

[Gaprosys]

My Code is now on Github here: https://github.com/BarelyAlive/Nether-Tweaks.

[Matryoshika]

Navigate to the referenced line that gets a nullpointer (at net.minecraft.world.Teleporter.placeInExistingPortal(Teleporter.java:134))

Place a breakpoint on that line, and test it. You should get all the information passed to that method, before the method itself is run, which should allow you to see exactly what being passed to it, is null.

 

A guide for placing breakpoints in Eclipse: http://help.eclipse.org/mars/index.jsp?topic=%2Forg.eclipse.jdt.doc.user%2Ftasks%2Ftask-add_line_breakpoints.htm

If you are using any other IDE, you gotta lookup their breakpoint placement yourself.

[Gaprosys]

It seems to be the teleporter class wants the last position of the player in the overworld to get his entrance position for the nether. Can I make the method wait until the player has a overworld position? Or something different?

[Animefan8888]

Maybe LivingSpawnEvent not sure if that gets called for the player though.

[Gaprosys]

I tried the LivingSpawn Event but it didn't work. When I looked into the sub events, it seemed that it is for mobs not players.