Inventory Reversing [1.6.2]

LemonLake · August 9, 2013

I am having a problem with items in Forge 9.10.0.804. When I create my new item using two old items, I recieve the new one fine, however as soon as I click it my inventory resets to it's previous state. The video explains it better:

[flash=640,360]https://youtube.googleapis.com/v/NXLulVE8x8k

Here is my code for swapping the items:

public void castSpellBlockFirst(ItemStack stack,EntityPlayer player,World world,int x,int y,int z,int side,float hitX,float hitY,float hitZ) {
	if(world.getBlockId(x,y,z)==Items.block_spelltable.blockID&&side==1){
		if(player.inventory.getStackInSlot(0)!=null){
			if(player.inventory.getStackInSlot(0).itemID!=Items.item_apprenticewand.itemID){
				/* Here's the items that can turn into spells */
				switch(player.inventory.getStackInSlot(0).itemID){
				case 370:
					player.inventory.consumeInventoryItem(Items.item_apprenticewand.itemID);
					player.inventory.consumeInventoryItem(Item.ghastTear.itemID);
					player.inventory.addItemStackToInventory(new ItemStack(Items.item_apprenticewand_soul, 1, 0));
					break;
				default:
					player.addChatMessage("§cNo available items found in first slot");
					break;
				}
			}else{
				player.addChatMessage("§cWands cannot be transmuted");
			}
		}else{
			player.addChatMessage("§cNo available items found in first slot");
		}
	}
}

Any help would be appreciated. If you need any information, just post or PM.

hydroflame · August 9, 2013

you're not doing the change server side

if(!world.isRemote){

//activate effect

}

LemonLake · August 9, 2013

you're not doing the change server side

if(!world.isRemote){

//activate effect

}

I thought that was the problem, but ignored it because in another spell I used it and thought I used it in my base function. Thanks!

EDIT: Now nothing happens when I right click, and I have a similar problem with my Soul Spell.

	public void castSpellBlockFirst(ItemStack stack,EntityPlayer player,World world,int x,int y,int z,int side,float hitX,float hitY,float hitZ) {
	if(!world.isRemote&&world.getBlockId(x,y,z)==Items.block_spelltable.blockID&&side==1){
		if(player.inventory.getStackInSlot(0)!=null){
			if(player.inventory.getStackInSlot(0).itemID!=Items.item_apprenticewand.itemID){
				/* Here's the items that can turn into spells */
				switch(player.inventory.getStackInSlot(0).itemID){
				case 370:
					player.inventory.consumeInventoryItem(Items.item_apprenticewand.itemID);
					player.inventory.consumeInventoryItem(Item.ghastTear.itemID);
					player.inventory.addItemStackToInventory(new ItemStack(Items.item_apprenticewand_soul, 1, 0));
					break;
				default:
					player.addChatMessage("§cNo available items found in first slot");
					break;
				}
			}else{
				player.addChatMessage("§cWands cannot be transmuted");
			}
		}else{
			player.addChatMessage("§cNo available items found in first slot");
		}
	}
}

hydroflame · August 9, 2013

can we see who/what is calling castSpellBlockFirst

LemonLake · August 9, 2013

Here's four classes: ItemWand, Spell, NullSpell (the one I'm referencing in my first post) and SoulSpell:

ItemWand.java:

package lemmy.eldercraft;

import java.util.List;

import org.lwjgl.opengl.GL11;

import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.FontRenderer;
import net.minecraft.client.gui.ScaledResolution;
import net.minecraft.client.renderer.texture.IconRegister;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.passive.EntityCow;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.world.World;
import net.minecraftforge.event.ForgeSubscribe;
import net.minecraftforge.event.entity.player.EntityInteractEvent;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

public class ItemWand extends Item {
public int type;
public Spell spell=new Spell();
public int cooldown=0;
private final Minecraft mc;

public ItemWand(int id,int type,Spell spell) {
	super(id);
	this.type=type;
	this.spell=spell;
	this.setCreativeTab(CreativeTabs.tabBrewing);
	this.setUnlocalizedName("wand_"+type);
	this.setMaxDamage((type==1?150:(type==2?400:800)));
	this.setMaxStackSize(1);
	this.setNoRepair();
	this.setFull3D();
	this.setHasSubtypes(true);
	mc = Minecraft.getMinecraft();
}

@Override
public boolean isDamageable() {
	return true;
}

@Override
@SideOnly(Side.CLIENT)
public void registerIcons(IconRegister icon) {
	itemIcon=icon.registerIcon("eldercraft:wand_"+type);
}

@Override
public boolean getIsRepairable(ItemStack par1ItemStack,ItemStack par2ItemStack) {
	return false;
}

@SideOnly(Side.CLIENT)
public void addInformation(ItemStack par1ItemStack,EntityPlayer par2EntityPlayer,List par3List,boolean par4) {
	super.addInformation(par1ItemStack,par2EntityPlayer,par3List,par4);
	switch(type){
	case 1:
		par3List.add("§bApprentice");
		String colorCode="2";
		int percentCharged=(int)((par1ItemStack.getMaxDamage()-par1ItemStack.getItemDamage())*100/par1ItemStack.getMaxDamage());
		if(percentCharged>85){
			colorCode="2";
		}else if(percentCharged>57){
			colorCode="a";
		}else if(percentCharged>43){
			colorCode="e";
		}else if(percentCharged>20){
			colorCode="c";
		}else{
			colorCode="4";
		}
		par3List.add("§"+colorCode+percentCharged+"% charged ("+par1ItemStack.getItemDamage()+"/"+par1ItemStack.getMaxDamage()+")");
		par3List.add("§bSpell: "+spell.name);
		for(String s:spell.descriptionlines){
			par3List.add(s);
		}
		break;
	}
}

public boolean onItemUse(ItemStack stack,EntityPlayer player,World world,int x,int y,int z,int side,float hitX,float hitY,float hitZ) {
	if(cooldown!=0) return false;
	cooldown=10;
	return spell.castSpellBlockEvent(stack,player,world,x,y,z,side,hitX,hitY,hitZ);
}

public boolean onItemUseFirst(ItemStack stack,EntityPlayer player,World world,int x,int y,int z,int side,float hitX,float hitY,float hitZ) {
	if(cooldown!=0) return false;
	cooldown=10;
	return spell.castSpellBlockFirstEvent(stack,player,world,x,y,z,side,hitX,hitY,hitZ);
}

public ItemStack onItemRightClick(ItemStack stack,World world,EntityPlayer player) {
	if(cooldown!=0) return stack;
	cooldown=10;
	return spell.castSpellAirEvent(stack,world,player);
}

public boolean func_111207_a(ItemStack stack,EntityPlayer player,EntityLivingBase entity) {
	if(cooldown!=0) return false;
	cooldown=10;
	return spell.castSpellEntityEvent(stack, player, entity);
}

public void onUpdate(ItemStack par1ItemStack,World par2World,Entity par3Entity,int par4,boolean par5) {
	super.onUpdate(par1ItemStack,par2World,par3Entity,par4,par5);
	if(cooldown>0)
		cooldown--;
	if(cooldown<0)
		cooldown=0;	
}

@SideOnly(Side.CLIENT)
public void renderHelmetOverlay(ItemStack stack,EntityPlayer player,ScaledResolution resolution,float partialTicks,boolean hasScreen,int mouseX,int mouseY) {
	super.renderHelmetOverlay(stack,player,resolution,partialTicks,hasScreen,mouseX,mouseY);
	GL11.glPushMatrix();
	GL11.glDisable(GL11.GL_LIGHTING);
	ScaledResolution res = new ScaledResolution(this.mc.gameSettings,
	this.mc.displayWidth, this.mc.displayHeight);
	FontRenderer fontRender = mc.fontRenderer;
	int width = res.getScaledWidth();
	int height = res.getScaledHeight();
	mc.entityRenderer.setupOverlayRendering();
	fontRender.drawStringWithShadow("Spell:",2,height-32,0xFFFFFF);
	fontRender.drawStringWithShadow(spell.name,2,height-23,0x000000);
	GL11.glPopMatrix();
}
}

Spell.java:

package lemmy.eldercraft;

import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.ItemStack;
import net.minecraft.world.World;
import net.minecraftforge.event.entity.player.EntityInteractEvent;

public class Spell {
public int level=1;
public int castChargeRequired=10;
public int wandRequired=1;
public int id=-1;
public boolean castAir,castBlock,castBlockFirst,castEntity=false;
public boolean renderGUI=true;
public String name="§4Unknown";
public String descriptionlines[]={"§cThis wand is spawned incorrectly.", "§cIf this was crafted, please report"};

public ItemStack castSpellAirEvent(ItemStack stack,World world,EntityPlayer player) {
	if(!castAir) return stack;
	if(stack.getMaxDamage()-stack.getItemDamage()>=castChargeRequired){
		stack.damageItem(castChargeRequired,player);
		castSpellAir(stack,world,player);
	}
	return stack;
}

public void castSpellAir(ItemStack stack,World world,EntityPlayer player) {
	// your code here
}

public boolean castSpellBlockEvent(ItemStack stack,EntityPlayer player,World world,int x,int y,int z,int side,float hitX,float hitY,float hitZ){
	if(!castBlock) return false;
	if(stack.getMaxDamage()-stack.getItemDamage()>=castChargeRequired){
		stack.damageItem(castChargeRequired,player);
		castSpellBlock(stack,player,world,x,y,z,side,hitX,hitY,hitZ);
	}
	return true;
}

public void castSpellBlock(ItemStack stack,EntityPlayer player,World world,int x,int y,int z,int side,float hitX,float hitY,float hitZ){
	// your code here
}

public boolean castSpellBlockFirstEvent(ItemStack stack,EntityPlayer player,World world,int x,int y,int z,int side,float hitX,float hitY,float hitZ){
	if(!castBlockFirst) return false;
	if(stack.getMaxDamage()-stack.getItemDamage()>=castChargeRequired){
		stack.damageItem(castChargeRequired,player);
		castSpellBlockFirst(stack,player,world,x,y,z,side,hitX,hitY,hitZ);
	}
	return true;
}

public void castSpellBlockFirst(ItemStack stack,EntityPlayer player,World world,int x,int y,int z,int side,float hitX,float hitY,float hitZ){
	// your code here
}

public boolean castSpellEntityEvent(ItemStack stack, EntityPlayer player, EntityLivingBase entity){
	if(!castEntity) return false;
	if(stack.getMaxDamage()-stack.getItemDamage()>=castChargeRequired){
		stack.damageItem(castChargeRequired,player);
		castSpellEntity(stack,player,entity);
	}
	return true;
}

public void castSpellEntity(ItemStack stack, EntityPlayer player, EntityLivingBase entity){
	// your code here
}
}

NullSpell.ava:

package lemmy.eldercraft;

import java.util.Random;

import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.monster.EntityPigZombie;
import net.minecraft.entity.passive.EntityPig;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.world.World;

public class NullSpell extends Spell {
public NullSpell() {
	castChargeRequired=0;
	level=-1;
	wandRequired=-1;
	id=0;
	name="§eNo Spell";
	descriptionlines=new String[]{};
	castBlockFirst=true;
}

public void castSpellBlockFirst(ItemStack stack,EntityPlayer player,World world,int x,int y,int z,int side,float hitX,float hitY,float hitZ) {
	if(!world.isRemote&&world.getBlockId(x,y,z)==Items.block_spelltable.blockID&&side==1){
		if(player.inventory.getStackInSlot(0)!=null){
			if(player.inventory.getStackInSlot(0).itemID!=Items.item_apprenticewand.itemID){
				/* Here's the items that can turn into spells */
				switch(player.inventory.getStackInSlot(0).itemID){
				case 370:
					player.inventory.consumeInventoryItem(Items.item_apprenticewand.itemID);
					player.inventory.consumeInventoryItem(Item.ghastTear.itemID);
					player.inventory.addItemStackToInventory(new ItemStack(Items.item_apprenticewand_soul, 1, 0));
					break;
				default:
					player.addChatMessage("§cNo available items found in first slot");
					break;
				}
			}else{
				player.addChatMessage("§cWands cannot be transmuted");
			}
		}else{
			player.addChatMessage("§cNo available items found in first slot");
		}
	}
}

}

SoulSpell.java

package lemmy.eldercraft;

import java.util.Random;

import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.monster.EntityPigZombie;
import net.minecraft.entity.passive.EntityPig;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;

public class SoulSpell extends Spell {
Random rand = new Random();
public SoulSpell() {
	castChargeRequired=50;
	level=1;
	wandRequired=1;
	id=1;
	castEntity=true;
	name="§eSoul Swap";
	descriptionlines=new String[]{"§dBasic"};
}

public void castSpellEntity(ItemStack stack,EntityPlayer player,EntityLivingBase entity) {
	if(!player.worldObj.isRemote){
		if(entity instanceof EntityPigZombie){
			EntityPig entity1=new EntityPig(player.worldObj);
			entity1.setPosition(entity.posX,entity.posY,entity.posZ);
			entity1.rotationPitch=entity.rotationPitch;
			entity1.rotationYaw=entity.rotationYaw;
			entity.setDead();
			player.worldObj.spawnEntityInWorld(entity1);
			for(int i=0;i<60;i++){
				player.worldObj.spawnParticle("enchantmenttable",entity.posX+rand.nextDouble()-0.5,entity.posY+(i*0.05)+3,entity.posZ+rand.nextDouble()-0.5,0,-5,0);
			}
		}else if(entity instanceof EntityPig){
			EntityPigZombie entity1=new EntityPigZombie(player.worldObj);
			entity1.setPosition(entity.posX,entity.posY,entity.posZ);
			entity1.rotationPitch=entity.rotationPitch;
			entity1.rotationYaw=entity.rotationYaw;
			entity1.setCurrentItemOrArmor(0,new ItemStack(Item.swordGold));
			entity.setDead();
			player.worldObj.spawnEntityInWorld(entity1);
			for(int i=0;i<60;i++){
				player.worldObj.spawnParticle("enchantmenttable",entity.posX+rand.nextDouble()-0.5,entity.posY+(i*0.05)+3,entity.posZ+rand.nextDouble()-0.5,0,-5,0);
			}
		}
	}
}
}

Summary: There are events in ItemWand. In spell, there are functions such as castSpellBlockFirstEvent. These do a few checks, then call castSpellBlockFirst. The event functions are called in ItemWand, and the non-event functions are overriden in the new spell.

hydroflame · August 9, 2013

1 just letting you know

onItemFirstUse is called every time a player start usign an item

2 in your ItemWand class you have a int cooldown

minecraft is not making a new item for each wand available in the world, so by putting this variable there everybody in the world will have the SAME cooldown

Now nothing happens when I right click

can you make a bunch of println and try to see which condition is failing ?

LemonLake · August 9, 2013

	public void castSpellBlockFirst(ItemStack stack,EntityPlayer player,World world,int x,int y,int z,int side,float hitX,float hitY,float hitZ) {
	System.out.println("1");
	if(!world.isRemote&&world.getBlockId(x,y,z)==Items.block_spelltable.blockID&&side==1){
		System.out.println("2");
		if(player.inventory.getStackInSlot(0)!=null){
			System.out.println("3");
			if(player.inventory.getStackInSlot(0).itemID!=Items.item_apprenticewand.itemID){
				/* Here's the items that can turn into spells */
				System.out.println("4");
				switch(player.inventory.getStackInSlot(0).itemID){
				case 370:
					System.out.println("5");
					player.inventory.consumeInventoryItem(Items.item_apprenticewand.itemID);
					player.inventory.consumeInventoryItem(Item.ghastTear.itemID);
					player.inventory.addItemStackToInventory(new ItemStack(Items.item_apprenticewand_soul, 1, 0));
					break;
				default:
					System.out.println("6");
					player.addChatMessage("§cNo available items found in first slot");
					break;
				}
				System.out.println("7");
			}else{
				System.out.println("8");
				player.addChatMessage("§cWands cannot be transmuted");
			}
		}else{
			System.out.println("9");
			player.addChatMessage("§cNo available items found in first slot");
		}
		System.out.println("10");
	}
	System.out.println("11");
}

2013-08-09 15:10:12 [iNFO] [sTDOUT] 1
2013-08-09 15:10:12 [iNFO] [sTDOUT] 11

hydroflame · August 9, 2013

Spell:

public boolean castSpellBlockFirstEvent(ItemStack stack,EntityPlayer player,World world,int x,int y,int z,int side,float hitX,float hitY,float hitZ){
if(FMLCommonHandler.instance().getEffectiveSide.isServer()){
System.out.println("server side thinks: "+castBlockFirst);
}else{
System.out.println("client side thinks: "+castBlockFirst);
}
	if(!castBlockFirst) return false;
	if(stack.getMaxDamage()-stack.getItemDamage()>=castChargeRequired){
		stack.damageItem(castChargeRequired,player);
		castSpellBlockFirst(stack,player,world,x,y,z,side,hitX,hitY,hitZ);
	}
	return true;
}

whats the output of thsi ?

LemonLake · August 9, 2013

Description Resource Path Location Type

getEffectiveSide cannot be resolved or is not a field Spell.java /Minecraft/src/lemmy/eldercraft line 49 Java Problem

Edit: Added parenthasis to the end of getEffectiveSide, testing now.

2013-08-09 15:19:19 [iNFO] [sTDOUT] client side thinks: true

hydroflame · August 9, 2013

FMLCommonHandler.instance().getEffectiveSide().isServer()

LemonLake · August 9, 2013

FMLCommonHandler.instance().getEffectiveSide().isServer()

Re-read, please.

hydroflame · August 9, 2013

server side thinks what ? nothing ? hmmm

try the same print in onItemFirstUse

if nothing appears there, that mean onItemFirstUse is never called server side :\

LemonLake · August 9, 2013

After adding castAir=true; to the constructor of NullItem, and adding your code to castAirEvent, then finally right clicking towards the sky, I just got 2013-08-09 15:25:29 [iNFO] [sTDOUT] client side thinks: true. No mention of serverside.

hydroflame · August 9, 2013

if nothing appears there, that mean onItemFirstUse is never called server side :\

youll have to use something else then

hydroflame · August 9, 2013

*reasearch a bit more in the issue*

*suspicious look*

*wtfbbq*

soooo onItemUseFirst is actually called by a method in ItemInWorldManager which is a class that is mainly used server side ... *suspicious look x2*

honestly you should start by changing the cooldown and spell reference to the nbt because its going to cause a butlaod of problem anyway later. and it will probably fix the current one too

LemonLake · August 9, 2013

It's not too much of a problem, I can simply use onBlockActivated on the Spell Table block. Unfortunately, I cannot use these functions for other spells

hydroflame · August 9, 2013

which is why you should start by changing spell and cooldown to the nbt, everything will work wonderfully after that

LemonLake · August 9, 2013

which is why you should start by changing spell and cooldown to the nbt, everything will work wonderfully after that

Spell should be an int, right? I only really need the object instance for the variables, nothing is stored in it really.

Edit: How would I go about storing NBT in an item?

hydroflame · August 9, 2013

well spell cannot be an int becasue you cant add method to int

but you COUDL store the spellID and whenever someone cast a wand it would check in the SpellLibrary (that you have to create btw) for which spell he is actually casting

pseudo code:

public class SpellLibrary{
    public static Spell[] allSpells;

    public static void populateLibrary(){
        allSpells = new Spell[10];
        allSpells[0] = new SpellWtv();
        allSpells[1] = new SpellEtc();
        allSpells[2] = new SpellMore();

    }
}

onItemUse(){
int spellid = getSpellId();
Spell aboutToCast = SpellLibrary.allSpells[spellid];
aboutToCast.cast();
}

LemonLake · August 9, 2013

How would I store NBT in an item?

hydroflame · August 9, 2013

not in the item but in the itemStack

ItemStack.java(line ~51):

/**
     * A NBTTagMap containing data about an ItemStack. Can only be used for non stackable items
     */
    public NBTTagCompound stackTagCompound;

conviniently, the itemStack used in "onItemUseFirst" and similar method is provided by the caller

LemonLake · August 9, 2013

	public int getSpellId(ItemStack stack){
	return stack.getTagCompound().getInteger("spell");
}

Correct?

hydroflame · August 9, 2013

pretty much, just make sure to create a new NBTTagCompound if its null at this point

LemonLake · August 9, 2013

pretty much, just make sure to create a new NBTTagCompound if its null at this point

So far, it works like a charm! Thanks!

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