[1.8] Change block model based on damage

JimiIT92 · September 4, 2015

Is there any way to see how a block is damaged? I mean, you hit the block for a period of time and then it breaks, is there a way to see

"if the block has been hitten for X time than use this model, if it has been hitten for Z time than use this other model"

I've tried using the damageValue but it always return the metadata (wich in my case is 0). So basically how can i check if a player is breaking a block and from how long he's doing it?

TheGreyGhost · September 4, 2015

Hi

You can hook into one of the block damaging events, and when you render your block (should be a TileEntity) check to see if the block being damaged is that one.

See here for background info

http://greyminecraftcoder.blogspot.ch/2015/01/mining-blocks-with-tools.html

-TGG

JimiIT92 · September 4, 2015

Thanks, i'll check it out I found another method but i don't know if is correct. Overriding this function

@SideOnly(Side.CLIENT)
    public boolean addHitEffects(World world, MovingObjectPosition target, net.minecraft.client.particle.EffectRenderer effectRenderer)
    {
return false;
}

lets me handle what happens when breaking the block. Is it correct doing stuff here?

JimiIT92 · September 5, 2015

Ok, so i've added the event handler, so i now have this

package blaze.core;

import net.minecraft.block.Block;
import net.minecraftforge.event.entity.player.PlayerEvent;
import net.minecraftforge.event.entity.player.PlayerInteractEvent;
import net.minecraftforge.event.world.BlockEvent;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;

public class Events
{
@SubscribeEvent
public void breakSpeed(PlayerEvent.BreakSpeed event)
{
	if (   (event.state == null || event.state.getBlock() != BLBlocks.coal_block)
			&& (event.entityPlayer == null || event.entityPlayer.getCurrentEquippedItem() == null || event.entityPlayer.getCurrentEquippedItem().getItem() != BLItems.topaz_hammer)) {
		return;
	}
	else
	{
		System.out.println("BREAKING");
		Block block = event.state.getBlock();

	}
}

}

So now how can i tell the game "change the block model while breaking"?

JimiIT92 · September 5, 2015

any suggest? I want to make something similar to how the discs works on pixelmon (so i place a block down, i keep hitting it and sometimes it change it's model), i figured out how to change its drop if i'm using a certain tool or a condition is true, but how can i also "make it visual", how can i change it's model the more the breaking progress goes up (so the more i breaking it the more the model will be smaller)

JimiIT92 · September 6, 2015

Ok, so i've done what you said but now i give this error


java.lang.IllegalArgumentException: Don't know how to convert null[damage=0] back into data...
at net.minecraft.block.Block.getMetaFromState(Block.java:272)
at net.minecraft.block.Block.setHarvestLevel(Block.java:2201)
at net.minecraft.block.Block.setHarvestLevel(Block.java:2183)
at blaze.blocks.BlockCoalBlock.<init>(BlockCoalBlock.java:40)
at blaze.core.BLBlocks.addBlocks(BLBlocks.java:108)
at blaze.core.BL.preInit(BL.java:33)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:536)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:208)
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:187)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:118)
at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:514)
at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:243)
at net.minecraft.client.Minecraft.startGame(Minecraft.java:446)
at net.minecraft.client.Minecraft.run(Minecraft.java:356)
at net.minecraft.client.main.Main.main(Main.java:117)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source)
at GradleStart.main(Unknown Source)

I see is related to the getMetaFromState method (wich you told me to not add it), so how can i fix that?

This is the updated block class

package blaze.blocks;

import java.util.Random;

import blaze.core.BLItems;
import blaze.items.ItemHammer;
import blaze.tileentities.TileEntityCoalBlock;
import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.block.properties.IProperty;
import net.minecraft.block.properties.PropertyInteger;
import net.minecraft.block.state.BlockState;
import net.minecraft.block.state.IBlockState;
import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.RenderGlobal;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.projectile.EntityArrow;
import net.minecraft.init.Blocks;
import net.minecraft.item.Item;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.BlockPos;
import net.minecraft.util.EnumFacing;
import net.minecraft.world.IBlockAccess;
import net.minecraft.world.World;
import net.minecraftforge.fml.relauncher.ReflectionHelper;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

public class BlockCoalBlock extends Block{

public static Item drop;

public static final PropertyInteger DAMAGE = PropertyInteger.create("damage", 0, 10);

public BlockCoalBlock() {
	super(Material.rock);
	this.setCreativeTab(CreativeTabs.tabBlock);
	this.setDefaultState(this.blockState.getBaseState().withProperty(DAMAGE, Integer.valueOf(0)));
	this.setHarvestLevel("pickaxe", 0);
	this.setHardness(3.0F);
	this.setResistance(15.0F);
}

/**
     * Get the actual Block state of this Block at the given position. This applies properties not visible in the
     * metadata, such as fence connections.
     */
@Override
@SideOnly(Side.CLIENT)
    public IBlockState getActualState(IBlockState state, IBlockAccess worldIn, BlockPos pos)
    {
    	IBlockState newState = state;
    	
    	RenderGlobal render = Minecraft.getMinecraft().renderGlobal;
    	
    	int damage = ReflectionHelper.getPrivateValue(RenderGlobal.class, render, 21);
    	
    	System.out.println(damage);
    	
        return newState;
    }

@SideOnly(Side.CLIENT)
    public Item getItem(World worldIn, BlockPos pos)
    {
        return Item.getItemFromBlock(this);
    }

/**
     * Get the Item that this Block should drop when harvested.
     *  
     * @param fortune the level of the Fortune enchantment on the player's tool
     */
    public Item getItemDropped(IBlockState state, Random rand, int fortune)
    {
        return drop == null ? Item.getItemFromBlock(this) : drop;
    }
    
    public static Item setItemToDrop(EntityPlayer player, World world, BlockPos pos)
    {
    	Block down = world.getBlockState(pos.down()).getBlock();
    	Item item = player.getHeldItem().getItem();
    	
    	if(item instanceof ItemHammer && down.equals(Blocks.anvil))
    	{
    		drop = BLItems.carbon;
    	}
    	else
    	{
    		drop = null;
    	}
    	return null;
    }

   
    protected BlockState createBlockState()
    {
        return new BlockState(this, new IProperty[] {DAMAGE});
    }
    
}

Choonster · September 6, 2015

You need to override

getMetaFromState

, just ignore the

DAMAGE

property in it.

getStateFromMeta

will always return the default state if you don't override it, which is what you want in this case.

JimiIT92 · September 6, 2015

Infact i see that when i place any block it calls taht method (and it always return null), so how to change this? How to use Field to get that value?

Failender · September 6, 2015

If ur question was how to get the value from a Field, u use Field#getValue and cast that

JimiIT92 · September 6, 2015

I don't know how to use field instead of reflection to access specific private values. I know that using this

Field[] fields = RenderGlobal.class.getFields();
System.out.println(fields.length);

it gives me the fields of a class but the system out return 0 (so is not returning anything at all). How can i access the damagedBlocks value using field?

Failender · September 6, 2015

RenderGlobal.class.getDeclaredField(fieldname)

JimiIT92 · September 6, 2015

Ok, so i've done this

try {
    		Field damage = RenderGlobal.class.getDeclaredField("damagedBlocks");
    		damage.setAccessible(true);
		System.out.println(damage.get(0));
	} catch (IllegalArgumentException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (IllegalAccessException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (NoSuchFieldException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (SecurityException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}

But now every tick i get this

[15:25:20] [server thread/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: java.lang.IllegalArgumentException: Can not set final java.util.Map field net.minecraft.client.renderer.RenderGlobal.damagedBlocks to java.lang.Integer
[15:25:20] [server thread/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
[15:25:20] [server thread/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
[15:25:20] [server thread/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at sun.reflect.UnsafeFieldAccessorImpl.ensureObj(Unknown Source)
[15:25:20] [server thread/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at sun.reflect.UnsafeQualifiedObjectFieldAccessorImpl.get(Unknown Source)
[15:25:20] [server thread/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at java.lang.reflect.Field.get(Unknown Source)
[15:25:20] [server thread/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at blaze.blocks.BlockCoalBlock.getActualState(BlockCoalBlock.java:65)
[15:25:20] [server thread/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at net.minecraft.block.Block.isSideSolid(Block.java:1295)
[15:25:20] [server thread/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at net.minecraft.block.Block.canCreatureSpawn(Block.java:1585)
[15:25:20] [server thread/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at net.minecraft.world.SpawnerAnimals.canCreatureTypeSpawnAtLocation(SpawnerAnimals.java:237)
[15:25:20] [server thread/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at net.minecraft.world.SpawnerAnimals.findChunksForSpawning(SpawnerAnimals.java:152)
[15:25:20] [server thread/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at net.minecraft.world.WorldServer.tick(WorldServer.java:206)
[15:25:20] [server thread/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:763)
[15:25:20] [server thread/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:669)
[15:25:20] [server thread/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:171)
[15:25:20] [server thread/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:540)
[15:25:20] [server thread/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at java.lang.Thread.run(Unknown Source)

this is called from the system out, where i do "damage.get(0)"

Failender · September 6, 2015

ur error is printed there. google it and u will find results.

why the hell are u calling get with a 0 as arg..

JimiIT92 · September 6, 2015

D'oh, i've changed the system out to this

RenderGlobal render = Minecraft.getMinecraft().renderGlobal;

    	try {
    		Field damage = RenderGlobal.class.getDeclaredField("damagedBlocks");
    		damage.setAccessible(true);
		System.out.println(damage.get(render).toString());
	} catch (IllegalArgumentException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (IllegalAccessException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (NoSuchFieldException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (SecurityException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}

wich is now correct, but the system out return this

[15:41:17] [Client thread/INFO] [sTDOUT]: [blaze.blocks.BlockCoalBlock:getActualState:65]: {}

and when destroying it gives me this

[15:41:31] [Client thread/INFO] [sTDOUT]: [blaze.blocks.BlockCoalBlock:getActualState:65]: {157=net.minecraft.client.renderer.DestroyBlockProgress@58da1b27}

So how to get the exact value of the damaging progress?

JimiIT92 · September 6, 2015

Looping though the values give me this

157=net.minecraft.client.renderer.DestroyBlockProgress@58da1b27

from the damage.get(render)

How to turn this into an integer (from 1 to 10)? Or how from damage variable obtain the position?

JimiIT92 · September 6, 2015

Sorry, my bad! Ok, so i've now this

/**
     * Get the actual Block state of this Block at the given position. This applies properties not visible in the
     * metadata, such as fence connections.
     */
@Override
@SideOnly(Side.CLIENT)
    public IBlockState getActualState(IBlockState state, IBlockAccess worldIn, BlockPos pos)
    {
    	IBlockState newState = state;
    	
    	RenderGlobal render = Minecraft.getMinecraft().renderGlobal;

    	DestroyBlockProgress progress = null;
    	
    	try {
    		Field damage = RenderGlobal.class.getDeclaredField("damagedBlocks");
    		damage.setAccessible(true);
    		HashMap mp = (HashMap)damage.get(render);
    		Iterator it = mp.entrySet().iterator();
    	    while (it.hasNext()) {
    	        Map.Entry pair = (Map.Entry)it.next();
    	        System.out.println(pair.getKey() + " = " + pair.getValue());
    	        progress = (DestroyBlockProgress) pair.getValue();
    	        it.remove(); // avoids a ConcurrentModificationException
    	        System.out.println(progress.getPartialBlockDamage());
    	    }


	} catch (IllegalArgumentException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (IllegalAccessException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (NoSuchFieldException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (SecurityException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
    	
        return newState;
    }

and i can keep track of how the block is damaged. Now, i just have to set a new block state with the progress value right? For example this?

return this.getStateFromMeta(2);

JimiIT92 · September 6, 2015

Ok, so now it looks like this

/**
 * Get the actual Block state of this Block at the given position. This applies properties not visible in the
 * metadata, such as fence connections.
 */
@Override
@SideOnly(Side.CLIENT)
public IBlockState getActualState(IBlockState state, IBlockAccess worldIn, BlockPos pos)
{
	IBlockState newState = state;

	RenderGlobal render = Minecraft.getMinecraft().renderGlobal;

	DestroyBlockProgress progress = null;

	try {
		Field damage = RenderGlobal.class.getDeclaredField("damagedBlocks");
		damage.setAccessible(true);
		Map mp = (Map)damage.get(render);
		Iterator it = mp.entrySet().iterator();
		while (it.hasNext()) {
			Map.Entry pair = (Map.Entry)it.next();
			progress = (DestroyBlockProgress) pair.getValue();
			newState = this.blockState.getBaseState().withProperty(DAMAGE, Integer.valueOf(progress.getPartialBlockDamage()));
		}

	} catch (IllegalArgumentException e) {
		e.printStackTrace();
	} catch (IllegalAccessException e) {
		e.printStackTrace();
	} catch (NoSuchFieldException e) {
		e.printStackTrace();
	} catch (SecurityException e) {
		e.printStackTrace();
	}

	return newState;
}

And when placing the block down by default it gives me this

This is the blockstate file for the block

{
    "variants": {
        "damage=0": { "model": "blaze:coal_block" },
	"damage=1": { "model": "blaze:coal_block" },
	"damage=2": { "model": "blaze:coal_block" },
	"damage=3": { "model": "blaze:coal_block" },
	"damage=4": { "model": "blaze:coal_block" },
	"damage=5": { "model": "blaze:coal_block_5" },
	"damage=6": { "model": "blaze:coal_block_5" },
	"damage=7": { "model": "blaze:coal_block_5" },
	"damage=8": { "model": "blaze:coal_block_5" },
	"damage=9": { "model": "blaze:coal_block_5" },
	"damage=10": { "model": "blaze:coal_block_5" }
    }
}

Also how to prevent from looking it every time?

Failender · September 6, 2015

- You are still looking up the Field every time. You only need to do that once.

JimiIT92 · September 6, 2015

/**
 * Get the actual Block state of this Block at the given position. This applies properties not visible in the
 * metadata, such as fence connections.
 */
@Override
@SideOnly(Side.CLIENT)
public IBlockState getActualState(IBlockState state, IBlockAccess worldIn, BlockPos pos)
{
	IBlockState newState = state;

	newState = this.blockState.getBaseState().withProperty(DAMAGE, Integer.valueOf(this.damage));

	return newState;
}

static {
	RenderGlobal render = Minecraft.getMinecraft().renderGlobal;

	DestroyBlockProgress progress = null;
	Field damage;
	try {
		damage = RenderGlobal.class.getDeclaredField("damagedBlocks");
		damage.setAccessible(true);
		if(damage != null)
		{
			Map mp = (Map)damage.get(render);
			Iterator it = mp.entrySet().iterator();
			while (it.hasNext()) {
				Map.Entry pair = (Map.Entry)it.next();
				progress = (DestroyBlockProgress) pair.getValue();

				BlockCoalBlock.damage = progress.getPartialBlockDamage();

			}
		}

	} catch (NoSuchFieldException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (SecurityException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (IllegalArgumentException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (IllegalAccessException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}

}

it gives me this

java.lang.ExceptionInInitializerError
at blaze.core.BLBlocks.addBlocks(BLBlocks.java:108) ~[bin/:?]
at blaze.core.BL.preInit(BL.java:33) ~[bin/:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_51]
at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:536) ~[forgeSrc-1.8-11.14.1.1375.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_51]
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[guava-17.0.jar:?]
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[guava-17.0.jar:?]
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[guava-17.0.jar:?]
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[guava-17.0.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[guava-17.0.jar:?]
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:208) ~[forgeSrc-1.8-11.14.1.1375.jar:?]
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:187) ~[forgeSrc-1.8-11.14.1.1375.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_51]
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[guava-17.0.jar:?]
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[guava-17.0.jar:?]
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[guava-17.0.jar:?]
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[guava-17.0.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[guava-17.0.jar:?]
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:118) [LoadController.class:?]
at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:514) [Loader.class:?]
at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:243) [FMLClientHandler.class:?]
at net.minecraft.client.Minecraft.startGame(Minecraft.java:446) [Minecraft.class:?]
at net.minecraft.client.Minecraft.run(Minecraft.java:356) [Minecraft.class:?]
at net.minecraft.client.main.Main.main(Main.java:117) [Main.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_51]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.11.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.11.jar:?]
at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source) [start/:?]
at GradleStart.main(Unknown Source) [start/:?]
Caused by: java.lang.NullPointerException
at sun.reflect.UnsafeFieldAccessorImpl.ensureObj(Unknown Source) ~[?:1.8.0_51]
at sun.reflect.UnsafeQualifiedObjectFieldAccessorImpl.get(Unknown Source) ~[?:1.8.0_51]
at java.lang.reflect.Field.get(Unknown Source) ~[?:1.8.0_51]
at blaze.blocks.BlockCoalBlock.<clinit>(BlockCoalBlock.java:86) ~[blockCoalBlock.class:?]
... 41 more

Also how to check the position? Since it's a static block i can't access the getPosition method

Failender · September 6, 2015

only lookup the field in the static block. everything else stays where it is

JimiIT92 · September 6, 2015

Alright, code changed to this

public static Field damage;
public static int d_progress;

...

/**
 * Get the actual Block state of this Block at the given position. This applies properties not visible in the
 * metadata, such as fence connections.
 */
@Override
@SideOnly(Side.CLIENT)
public IBlockState getActualState(IBlockState state, IBlockAccess worldIn, BlockPos pos)
{
	IBlockState newState = state;

	RenderGlobal render = Minecraft.getMinecraft().renderGlobal;

	DestroyBlockProgress progress = null;

	if(damage != null)
	{
		Map mp;
		try {
			mp = (Map)damage.get(render);
			Iterator it = mp.entrySet().iterator();
			while (it.hasNext()) {
				Map.Entry pair = (Map.Entry)it.next();
				progress = (DestroyBlockProgress) pair.getValue();

				if(progress.getPosition().equals(pos))
				{
					d_progress = progress.getPartialBlockDamage();
					newState = this.blockState.getBaseState().withProperty(DAMAGE, Integer.valueOf(this.d_progress));
				}
			}
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		}
	}
	return newState;
}

static {

	try {
		damage = RenderGlobal.class.getDeclaredField("damagedBlocks");
		damage.setAccessible(true);
	} catch (NoSuchFieldException e) {
		e.printStackTrace();
	} catch (SecurityException e) {
		e.printStackTrace();
	} catch (IllegalArgumentException e) {
		e.printStackTrace();
	}
}

But still get the incorrect blockstate when placing it down

JimiIT92 · September 6, 2015

forgot to change that, it was static beacause before was used in the static block.

So i need to return this right?

state.withProperty(DAMAGE, Integer.valueOf(this.d_progress));

EDIT: changed to this

@Override
@SideOnly(Side.CLIENT)
public IBlockState getActualState(IBlockState state, IBlockAccess worldIn, BlockPos pos)
{
	IBlockState newState = state;

	RenderGlobal render = Minecraft.getMinecraft().renderGlobal;

	DestroyBlockProgress progress = null;

	if(damage != null)
	{
		Map mp;
		try {
			mp = (Map)damage.get(render);
			Iterator it = mp.entrySet().iterator();
			while (it.hasNext()) {
				Map.Entry pair = (Map.Entry)it.next();
				progress = (DestroyBlockProgress) pair.getValue();

				if(progress.getPosition().equals(pos))
				{
					newState = state.withProperty(DAMAGE, Integer.valueOf(progress.getPartialBlockDamage()));
				}
			}
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		}
	}
	return newState;
}

still returning the incorrect block model

JimiIT92 · September 6, 2015

Removed, updated previous code

JimiIT92 · September 6, 2015

It goes from 0 to 8 while breaking the block, reaching the 8 when is nearly broken. I've printed this

progress.getPartialBlockDamage()

JimiIT92 · September 6, 2015

If i return this

newState = state.withProperty(DAMAGE, Integer.valueOf(0));

it's still returning me the model that should be corresponding the the damage 5 or higher, so i think could be this the problem.

This is how i register the block

block.setUnlocalizedName(name);
	GameRegistry.registerBlock(block, ItemCoalBlock.class, name);
	ModelBakery.addVariantName(Item.getItemFromBlock(coal_block), 
			BL.MODID + ":" + "coal_block", 
			BL.MODID + ":" + "coal_block",
			BL.MODID + ":" + "coal_block",
			BL.MODID + ":" + "coal_block",
			BL.MODID + ":" + "coal_block",
			BL.MODID + ":" + "coal_block",
			BL.MODID + ":" + "coal_block",
			BL.MODID + ":" + "coal_block",
			BL.MODID + ":" + "coal_block",
			BL.MODID + ":" + "coal_block",
			BL.MODID + ":" + "coal_block");
	for(int i = 0; i < 11; i++)
		renderItem.getItemModelMesher().register(Item.getItemFromBlock(block), i, new ModelResourceLocation(BL.MODID + ":" + name, "inventory"));

block is the coal_block instance

name is the unlocalized name

renderItem is the RenderItem instance

and this is the blockstate file

{
    "variants": {
        "damage=0": { "model": "blaze:coal_block" },
	"damage=1": { "model": "blaze:coal_block" },
	"damage=2": { "model": "blaze:coal_block" },
	"damage=3": { "model": "blaze:coal_block" },
	"damage=4": { "model": "blaze:coal_block" },
	"damage=5": { "model": "blaze:coal_block_5" },
	"damage=6": { "model": "blaze:coal_block_5" },
	"damage=7": { "model": "blaze:coal_block_5" },
	"damage=8": { "model": "blaze:coal_block_5" },
	"damage=9": { "model": "blaze:coal_block_5" },
	"damage=10": { "model": "blaze:coal_block_5" }
    }
}

And this is the block model file for damage 0-4

{
    "parent": "block/cube_all",
    "textures": {
        "all": "blocks/coal_block"
    }
}

and for damage 5-10

{
    "textures": {
        "all": "blocks/coal_block",
	"particle": "blocks/coal_block"
    },
"elements": [
        {   "from": [ 0, 0, 0 ],
            "to": [ 16, 5, 16 ],
            "faces": {
                "down":  { "texture": "#all", "cullface": "down" },
                "up":    { "texture": "#all", "cullface": "up" },
                "north": { "texture": "#all", "cullface": "north" },
                "south": { "texture": "#all", "cullface": "south" },
                "west":  { "texture": "#all", "cullface": "west" },
                "east":  { "texture": "#all", "cullface": "east" }
            }
        }
    ]
}

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[1.8] Change block model based on damage

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