[1.7.10][SOLVED]A few questions...

[nosrick]

Sorry I'm asking so much today, I'm brand new to modding and all of this is a bit overwhelming.

 

Just two questions for now;

How do I make a block destroy itself? I tried use worldObj.setBlockToAir but that leaves behind the bounding box for some reason (and when the tile is right clicked, the block respawns).

 

And how do I spawn a mob out of a block? I've tried worldObj.spawnEntityInWorld, but nothing comes out of it.

 

Any help is greatly appreciated.

[HappyKiller1O1]

1) That means it only destroyed the block on the client. You need to make sure the server is destroying it as well.

2) You'd need to use the onBlockActivated method and then, spawn the entity by setting it (EntityCreeper creeper = new EntityCreeper(It's params)) and then, spawning it (world.spawnEntityInWorld(creeper)).

 

Hope that helps.

[nosrick]

I made a mistake in my opening post; it's a tile entity, not a block, so onBlockActivated isn't available to me.

 

1) How would I go about doing that?

2) As above, it's a tile entity. I did try the EntityCreeper creeper = new EntityCreeper then spawning it through spawnEntityInWorld(creeper), but again, nothing came of it. I'm currently trying to do it in updateEntity, as that's where the egg's (the tile entity in question) hatching logic is.

 

[nosrick]

A TileEntity is always linked to a Block. You cannot have a TileEntity without a Block.

 

So how would I go about accessing that block for the onBlockActivated method? Would I go through this.blockType, or would it be an Override? (which I don't think I can do)

 

On top of that, how am I meant to know what parameters onBlockActivated takes? It's just a bunch of unnamed, undocumented ints, floats, a World and an EntityPlayer.

[larsgerrits]

Uhm, please tell me you actually have a block class...

[nosrick]

I do, it creates the TileEntity when placed.

 

Here's the outline of what I'm trying to do;

Place down an egg (Not vanilla Minecraft one)

When it receives enough heat, it hatches, deleting itself and spawning a creature.

 

So far, I've got the egg placing down fine, it receives heat just fine and it hatches just fine. The only problems I'm having are with it deleting itself (only happens clientside for some reason) and spawning a creature (spawnEntityInWorld does nothing).

[nosrick]

EDIT: I apologise in advance for anything that might be wrong with my code. No comments due to me just trying to bang this out, and my Java is a little rusty, so I might not be doing best practises.

 

The block:

 

package com.nosrick.minersgotchi.blocks;

import com.nosrick.minersgotchi.MinersGotchi;
import com.nosrick.minersgotchi.tileentities.TileEntityGotchiEgg;

import cpw.mods.fml.common.registry.GameRegistry;
import net.minecraft.block.Block;
import net.minecraft.block.BlockContainer;
import net.minecraft.block.ITileEntityProvider;
import net.minecraft.block.material.Material;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.world.World;

public class GotchiEggBlock extends BlockContainer
{
public final static String name = "GotchiEggBlock";

protected GotchiEggBlock(Material materialRef) 
{
	super(materialRef);
	this.setCreativeTab(CreativeTabs.tabBlock);
	this.setBlockName(MinersGotchi.MODID + "_" + name);
	this.setBlockTextureName(MinersGotchi.MODID + ":" + name);
	this.setHardness(15.0F);
	this.setBlockBounds(0.1F, 0.0F, 0.1F, 0.9F, 0.7F, 0.9F);
}

@Override
public TileEntity createNewTileEntity(World worldRef, int metadata) 
{
	return new TileEntityGotchiEgg();
}

@Override
public int getRenderType()
{
	return -1;
}

@Override
public boolean isOpaqueCube()
{
	return false;
}

@Override
public boolean renderAsNormalBlock()
{
	return false;
}

@Override
public boolean hasTileEntity(int metadata)
{
	return true;
}

}

 

 

The tile entity:

 

package com.nosrick.minersgotchi.tileentities;

import java.util.ArrayList;

import com.nosrick.minersgotchi.needs.GotchiNeed;
import com.nosrick.minersgotchi.needs.GotchiNeedsManager;

import net.minecraft.entity.passive.EntitySheep;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.server.MinecraftServer;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.world.World;

public class TileEntityGotchiEgg extends TileEntity 
{
public static final String publicName = "TileEntityGotchiEgg";

private String name = "TileEntityGotchiEgg";
private GotchiNeedsManager needsManager;

private int hatchTimer;

public TileEntityGotchiEgg()
{		
	ArrayList<GotchiNeed> eggNeeds = new ArrayList<GotchiNeed>();

	//20 ticks per second, need decreases every 5 seconds
	eggNeeds.add(new GotchiNeed("Heat", 0, 20));
	needsManager = new GotchiNeedsManager(eggNeeds);

	hatchTimer = 100;
}

public String GetName()
{
	return name;
}

@Override
public void updateEntity()
{
	needsManager.Update();
	if(hatchTimer > 0)
	{
		hatchTimer -= 1;
	}

	float totalLight = 0;
	float nonZeroSources = 0;
	float light = worldObj.getBlockLightValue(xCoord - 1, yCoord, zCoord); 
	if(light > 0.0F)
	{
		totalLight += light;
		nonZeroSources += 1;
	}

	light = worldObj.getBlockLightValue(xCoord + 1, yCoord, zCoord);
	if(light > 0.0F)
	{
		totalLight += light;
		nonZeroSources += 1;
	}

	light = worldObj.getBlockLightValue(xCoord, yCoord, zCoord - 1);
	if(light > 0.0F)
	{
		totalLight += light;
		nonZeroSources += 1;
	}

	light = worldObj.getBlockLightValue(xCoord, yCoord, zCoord + 1);
	if(light > 0.0F)
	{
		totalLight += light;
		nonZeroSources += 1;
	}

	if((totalLight / nonZeroSources) >= 14.0F)
	{
		needsManager.SatisfyNeed("Heat", 1);
		System.out.println("Receiving heat, " + (totalLight / nonZeroSources));
	}

	if(hatchTimer == 0 && needsManager.GetAverageSatisfaction("Heat") > 100)
	{
		//Hatch!
		System.out.println("Hatching!");

		//Move onto spawning a creature

		//Doesn't work
		EntitySheep sheep = new EntitySheep(worldObj);
		worldObj.spawnEntityInWorld(sheep);

		//Only happens clientside?
		worldObj.setBlockToAir(xCoord, yCoord, zCoord);
	}
}
}

 

[larsgerrits]

1) You have to pass the coordinates of the entity in the constructor too, or else the entity will be at 0,0,0.

2) Only set the block to air on the server (!world.isRemote), and see if that helps.

[nosrick]

The creature now spawns, but I can't interact with it for some reason. I get the feeling I'm missing quite a lot and it isn't as simple as just using spawnEntityInWorld.

 

I've now put the setBlockToAir inside an if(!world.IsRemote) but now the block won't delete itself at all.

 

I'm going to bed for now, so I'll check back in a few hours.

[Draco18s]

Did you spawn it client side or server side?

[HappyKiller1O1]

If you can't interact with it, it means the texture is there but not the server data. Make sure you spawn it on server side ONLY

[nosrick]

Did you spawn it client side or server side?

 

I have no idea! Totally new to this, so I stupidly assumed Minecraft would handle this sort of thing on its own.

 

Make sure you spawn it on server side ONLY

 

How do I do that?

[nosrick]

Posting from my phone, so forgive any formatting errors.

 

I've already put a world.isRemote around the spawning and block deletion, but when I do, it causes nothing to happen.

[nosrick]

Show the code with the isRemote check.

Also, you are not using the default block item but a custom one, right? If so, post that as well.

 

The tile entity trying to spawn an entity, and destroy itself (where the isRemote check is)

 

package com.nosrick.minersgotchi.tileentities;

import java.util.ArrayList;

import com.nosrick.minersgotchi.needs.GotchiNeed;
import com.nosrick.minersgotchi.needs.GotchiNeedsManager;

import net.minecraft.entity.passive.EntitySheep;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.server.MinecraftServer;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.world.World;

public class TileEntityGotchiEgg extends TileEntity 
{
public static final String publicName = "TileEntityGotchiEgg";

private String name = "TileEntityGotchiEgg";
private GotchiNeedsManager needsManager;

private int hatchTimer;

public TileEntityGotchiEgg()
{		
	ArrayList<GotchiNeed> eggNeeds = new ArrayList<GotchiNeed>();

	//20 ticks per second, need decreases every 5 seconds
	eggNeeds.add(new GotchiNeed("Heat", 0, 20));
	needsManager = new GotchiNeedsManager(eggNeeds);

	hatchTimer = 100;
}

public String GetName()
{
	return name;
}

@Override
public void updateEntity()
{
	needsManager.Update();
	if(hatchTimer > 0)
	{
		hatchTimer -= 1;
	}

	float totalLight = 0;
	float nonZeroSources = 0;
	float light = worldObj.getBlockLightValue(xCoord - 1, yCoord, zCoord); 
	if(light > 0.0F)
	{
		totalLight += light;
		nonZeroSources += 1;
	}

	light = worldObj.getBlockLightValue(xCoord + 1, yCoord, zCoord);
	if(light > 0.0F)
	{
		totalLight += light;
		nonZeroSources += 1;
	}

	light = worldObj.getBlockLightValue(xCoord, yCoord, zCoord - 1);
	if(light > 0.0F)
	{
		totalLight += light;
		nonZeroSources += 1;
	}

	light = worldObj.getBlockLightValue(xCoord, yCoord, zCoord + 1);
	if(light > 0.0F)
	{
		totalLight += light;
		nonZeroSources += 1;
	}

	if((totalLight / nonZeroSources) >= 14.0F)
	{
		needsManager.SatisfyNeed("Heat", 1);
		System.out.println("Receiving heat, " + (totalLight / nonZeroSources));
	}

	if(hatchTimer == 0 && needsManager.GetAverageSatisfaction("Heat") > 100)
	{
		//Hatch!
		System.out.println("Hatching!");

		//Move onto spawning a creature

		if(!worldObj.isRemote)
		{
			//Doesn't work
			EntitySheep sheep = new EntitySheep(worldObj);
			sheep.setPosition(xCoord, yCoord, zCoord);
			worldObj.spawnEntityInWorld(sheep);

		//Only happens clientside?
			worldObj.setBlockToAir(xCoord, yCoord, zCoord);
		}
	}
}
}

 

 

The custom block:

 

package com.nosrick.minersgotchi.blocks;

import com.nosrick.minersgotchi.MinersGotchi;
import com.nosrick.minersgotchi.tileentities.TileEntityGotchiEgg;

import cpw.mods.fml.common.registry.GameRegistry;
import net.minecraft.block.Block;
import net.minecraft.block.BlockContainer;
import net.minecraft.block.ITileEntityProvider;
import net.minecraft.block.material.Material;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.world.World;

public class GotchiEggBlock extends BlockContainer
{
public final static String name = "GotchiEggBlock";

protected GotchiEggBlock(Material materialRef) 
{
	super(materialRef);
	this.setCreativeTab(CreativeTabs.tabBlock);
	this.setBlockName(MinersGotchi.MODID + "_" + name);
	this.setBlockTextureName(MinersGotchi.MODID + ":" + name);
	this.setHardness(15.0F);
	this.setBlockBounds(0.1F, 0.0F, 0.1F, 0.9F, 0.7F, 0.9F);
}

@Override
public TileEntity createNewTileEntity(World worldRef, int metadata) 
{
	return new TileEntityGotchiEgg();
}

@Override
public int getRenderType()
{
	return -1;
}

@Override
public boolean isOpaqueCube()
{
	return false;
}

@Override
public boolean renderAsNormalBlock()
{
	return false;
}

@Override
public boolean hasTileEntity(int metadata)
{
	return true;
}

}

 

[nosrick]

Okay, I've moved all of the logic to the server. My problem now is the fact that isRemote always returns true, meaning that nothing happens at all.

[nosrick]

So would that be a problem in createNewTileEntity(), or elsewhere?

[nosrick]

I hope this isn't a really dumb answer, but...

 

By right-clicking. It should be a pretty standard procedure.

[nosrick]

Starting a new world fixed it.

That's really strange.

 

Thanks for all the help! I'll be sure to keep the client/server stuff in mind when coding from here on out, I've learnt a lot thanks to this thread.

 

Expect more questions soon!

[nosrick]

I'll keep that in mind the next time something goes wrong.

 

Again, thanks for all the help. I'll mark this as solved.