Jump to content

[1.7.10] [SOLVED] Checking Player for Custom Armor w/ NBT Data


Recommended Posts

Posted

I'm trying to make a mod which adds custom armor and a GUI that can display certain properties of the armor, namely it's operation mode. These properties are stored as NBT tags, which I can set and acces, however I'm trying to write a function that checks the player's armor slots and detects if he's/she's wearing the custom armor and, if he/she is, get the NBT data from it.

Every attempt I've made at this so far only resulted in my game crashing or simply nothing happening. My code looked something like this

//Helmet
if (player.inventory.armorInventory[3] != null) {
   if (player.inventory.armorInventory[3].getItem() == MODNAME.Helmet) {
       return player.inventory.armorInventory[3].getCompoundTag().getInterger("mode");
   }
}

 

However, like I said this just crashes. Any help would be appreciated.

(Also, this code is being run in the onArmorTick method of the helmet, as it's supposed to serve as a sort of heads-up-display.)

 

EDIT: After doing some testing, it seems as though the crash is coming from trying to get the NBT data itself. The data is formatted as an interger with a value of 2.

Posted

I'm trying to make a mod which adds custom armor and a GUI that can display certain properties of the armor, namely it's operation mode. These properties are stored as NBT tags, which I can set and acces, however I'm trying to write a function that checks the player's armor slots and detects if he's/she's wearing the custom armor and, if he/she is, get the NBT data from it.

Every attempt I've made at this so far only resulted in my game crashing or simply nothing happening. My code looked something like this

//Helmet
if (player.inventory.armorInventory[3] != null) {
   if (player.inventory.armorInventory[3].getItem() == MODNAME.Helmet) {
       return player.inventory.armorInventory[3].getCompoundTag().getInterger("mode");
   }
}

 

However, like I said this just crashes. Any help would be appreciated.

(Also, this code is being run in the onArmorTick method of the helmet, as it's supposed to serve as a sort of heads-up-display.)

Give the crash.

I'm back from being gone for... I think its been about a year. I'm pretty sure nobody remembers me, but hello anybody who does!

Posted

Here's the crash report

 

---- Minecraft Crash Report ----

// My bad.

 

Time: 2/21/15 7:20 PM

Description: Ticking player

 

java.lang.NullPointerException: Ticking player

at com.sciman.cyborg.items.ItemCyborgHelmet.grabArmorModes(ItemCyborgHelmet.java:49)

at com.sciman.cyborg.items.ItemCyborgHelmet.onArmorTick(ItemCyborgHelmet.java:38)

at net.minecraft.entity.player.InventoryPlayer.decrementAnimations(InventoryPlayer.java:355)

at net.minecraft.entity.player.EntityPlayer.onLivingUpdate(EntityPlayer.java:610)

at net.minecraft.entity.EntityLivingBase.onUpdate(EntityLivingBase.java:1816)

at net.minecraft.entity.player.EntityPlayer.onUpdate(EntityPlayer.java:327)

at net.minecraft.entity.player.EntityPlayerMP.onUpdateEntity(EntityPlayerMP.java:330)

at net.minecraft.network.NetHandlerPlayServer.processPlayer(NetHandlerPlayServer.java:329)

at net.minecraft.network.play.client.C03PacketPlayer.processPacket(C03PacketPlayer.java:37)

at net.minecraft.network.play.client.C03PacketPlayer.processPacket(C03PacketPlayer.java:111)

at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:241)

at net.minecraft.network.NetworkSystem.networkTick(NetworkSystem.java:182)

at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:726)

at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:614)

at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:118)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:485)

at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:752)

 

 

A detailed walkthrough of the error, its code path and all known details is as follows:

---------------------------------------------------------------------------------------

 

-- Head --

Stacktrace:

at com.sciman.cyborg.items.ItemCyborgHelmet.grabArmorModes(ItemCyborgHelmet.java:49)

at com.sciman.cyborg.items.ItemCyborgHelmet.onArmorTick(ItemCyborgHelmet.java:38)

at net.minecraft.entity.player.InventoryPlayer.decrementAnimations(InventoryPlayer.java:355)

at net.minecraft.entity.player.EntityPlayer.onLivingUpdate(EntityPlayer.java:610)

at net.minecraft.entity.EntityLivingBase.onUpdate(EntityLivingBase.java:1816)

at net.minecraft.entity.player.EntityPlayer.onUpdate(EntityPlayer.java:327)

 

-- Player being ticked --

Details:

Entity Type: null (net.minecraft.entity.player.EntityPlayerMP)

Entity ID: 0

Entity Name: Player206

Entity's Exact location: 1323.34, 56.00, 186.43

Entity's Block location: World: (1323,56,186), Chunk: (at 11,3,10 in 82,11; contains blocks 1312,0,176 to 1327,255,191), Region: (2,0; contains chunks 64,0 to 95,31, blocks 1024,0,0 to 1535,255,511)

Entity's Momentum: 0.00, -0.08, 0.00

Stacktrace:

at net.minecraft.entity.player.EntityPlayerMP.onUpdateEntity(EntityPlayerMP.java:330)

at net.minecraft.network.NetHandlerPlayServer.processPlayer(NetHandlerPlayServer.java:329)

at net.minecraft.network.play.client.C03PacketPlayer.processPacket(C03PacketPlayer.java:37)

at net.minecraft.network.play.client.C03PacketPlayer.processPacket(C03PacketPlayer.java:111)

at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:241)

 

-- Ticking connection --

Details:

Connection: net.minecraft.network.NetworkManager@794dfd82

Stacktrace:

at net.minecraft.network.NetworkSystem.networkTick(NetworkSystem.java:182)

at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:726)

at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:614)

at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:118)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:485)

at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:752)

 

-- System Details --

Details:

Minecraft Version: 1.7.10

Operating System: Windows 7 (amd64) version 6.1

Java Version: 1.7.0_75, Oracle Corporation

Java VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Oracle Corporation

Memory: 881999816 bytes (841 MB) / 1038876672 bytes (990 MB) up to 1038876672 bytes (990 MB)

JVM Flags: 3 total; -Xincgc -Xmx1024M -Xms1024M

AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used

IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0

FML: MCP v9.05 FML v7.10.85.1291 Minecraft Forge 10.13.2.1291 4 mods loaded, 4 mods active

mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available

FML{7.10.85.1291} [Forge Mod Loader] (forgeSrc-1.7.10-10.13.2.1291.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available

Forge{10.13.2.1291} [Minecraft Forge] (forgeSrc-1.7.10-10.13.2.1291.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available

cyborgmod{1.0} [cyborgmod] (bin) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available

Profiler Position: N/A (disabled)

Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used

Player Count: 1 / 8; [EntityPlayerMP['Player206'/0, l='Mod Testing', x=1323.34, y=56.00, z=186.43]]

Type: Integrated Server (map_client.txt)

Is Modded: Definitely; Client brand changed to 'fml,forge'

Posted

Ok, so I tried that with this code

 

public int[] grabArmorModes(EntityPlayer player) {
	int[] ret_mod = new int[] {0,0,0,0};
	if (player.inventory.armorInventory[3] != null) {
		if (player.inventory.armorInventory[3].getItem() == CyborgMod.cyborgHelmet) {
			System.out.println(player.inventory.armorInventory[3].getItem().getUnlocalizedName());
			NBTTagCompound temp = player.inventory.armorInventory[3].getTagCompound();
			if (temp != null) {
				ret_mod[0] = temp.getInteger("mode");
				System.out.println("Sucess! got int" + String.valueOf(temp.getInteger("mode")));
			}
		}
	}
	return ret_mod;

}

(grabArmorModes is the function used by the helmet object to pass the armor values to the GUI to display)

 

It prints the item's name to the console, but never gets to the next print value, so the NBT tag must be return null.

This is where I declare the NBT data

//Declare NBT data
	NBTTagCompound tag = new NBTTagCompound();
	tag.setInteger("mode", 2);
	tag.setFloat("power",0F);

 

What am I doing wrong?

EDIT: I'm going to try changing it so that the GUI itself gets the armor values, not the helmet.

EDIT AGAIN: It looks like the NBT data always returns null. I'm goign to try and see if I can fix that.

Posted

My guess you are declaring it wrong.

//Declare NBT data
	NBTTagCompound tag = new NBTTagCompound();
	tag.setInteger("mode", 2);
	tag.setFloat("power",0F);

 

What is this doing? You simply make new NBT object, that's all.

 

write wraped getter for NBTTag:

if (stack.getTagCompound() == null) stack.tagCompound = new NBTTagCompound()
return stack.getTagCompound() ;

1.7.10 is no longer supported by forge, you are on your own.

Posted

in what method would I put the getter, since it would go into an armor item?

 

Edit: Actually, maybe I should just change this thread to 'How do I add NBT data to an item on creation and retrieve that data from a GUI?'

Posted

I'll just write it: post whole code of your armour.

 

Creating new local (in-method) NBT and putting values into it doesn't magically make that NBTTag be itemstack's one. You need to itemstack.nbttag = new NBT whenever it is null;

1.7.10 is no longer supported by forge, you are on your own.

Posted

Nevermind, i figured it out.

 

I put this code into the armor

if (stack.stackTagCompound == null) {
		stack.stackTagCompound = new NBTTagCompound();
		stack.stackTagCompound.setInteger("mode", 2);
		stack.stackTagCompound.setFloat("power", 0F);
		System.out.println("Made NBT data");
	}

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Announcements



  • Recently Browsing

    • No registered users viewing this page.
  • Posts

    • Version 1.19 - Forge 41.0.63 I want to create a wolf entity that I can ride, so far it seems to be working, but the problem is that when I get on the wolf, I can’t control it. I then discovered that the issue is that the server doesn’t detect that I’m riding the wolf, so I’m struggling with synchronization. However, it seems to not be working properly. As I understand it, the server receives the packet but doesn’t register it correctly. I’m a bit new to Java, and I’ll try to provide all the relevant code and prints *The comments and prints are translated by chatgpt since they were originally in Spanish* Thank you very much in advance No player is mounted, or the passenger is not a player. No player is mounted, or the passenger is not a player. No player is mounted, or the passenger is not a player. No player is mounted, or the passenger is not a player. No player is mounted, or the passenger is not a player. MountableWolfEntity package com.vals.valscraft.entity; import com.vals.valscraft.network.MountSyncPacket; import com.vals.valscraft.network.NetworkHandler; import net.minecraft.client.Minecraft; import net.minecraft.network.syncher.EntityDataAccessor; import net.minecraft.network.syncher.EntityDataSerializers; import net.minecraft.network.syncher.SynchedEntityData; import net.minecraft.server.MinecraftServer; import net.minecraft.server.level.ServerPlayer; import net.minecraft.world.entity.EntityType; import net.minecraft.world.entity.Mob; import net.minecraft.world.entity.ai.attributes.AttributeSupplier; import net.minecraft.world.entity.ai.attributes.Attributes; import net.minecraft.world.entity.animal.Wolf; import net.minecraft.world.entity.player.Player; import net.minecraft.world.entity.Entity; import net.minecraft.world.InteractionHand; import net.minecraft.world.InteractionResult; import net.minecraft.world.item.ItemStack; import net.minecraft.world.item.Items; import net.minecraft.world.level.Level; import net.minecraft.world.phys.Vec3; import net.minecraftforge.event.TickEvent; import net.minecraftforge.eventbus.api.SubscribeEvent; import net.minecraftforge.network.PacketDistributor; public class MountableWolfEntity extends Wolf { private boolean hasSaddle; private static final EntityDataAccessor<Byte> DATA_ID_FLAGS = SynchedEntityData.defineId(MountableWolfEntity.class, EntityDataSerializers.BYTE); public MountableWolfEntity(EntityType<? extends Wolf> type, Level level) { super(type, level); this.hasSaddle = false; } @Override protected void defineSynchedData() { super.defineSynchedData(); this.entityData.define(DATA_ID_FLAGS, (byte)0); } public static AttributeSupplier.Builder createAttributes() { return Wolf.createAttributes() .add(Attributes.MAX_HEALTH, 20.0) .add(Attributes.MOVEMENT_SPEED, 0.3); } @Override public InteractionResult mobInteract(Player player, InteractionHand hand) { ItemStack itemstack = player.getItemInHand(hand); if (itemstack.getItem() == Items.SADDLE && !this.hasSaddle()) { if (!player.isCreative()) { itemstack.shrink(1); } this.setSaddle(true); return InteractionResult.SUCCESS; } else if (!level.isClientSide && this.hasSaddle()) { player.startRiding(this); MountSyncPacket packet = new MountSyncPacket(true); // 'true' means the player is mounted NetworkHandler.CHANNEL.sendToServer(packet); // Ensure the server handles the packet return InteractionResult.SUCCESS; } return InteractionResult.PASS; } @Override public void travel(Vec3 travelVector) { if (this.isVehicle() && this.getControllingPassenger() instanceof Player) { System.out.println("The wolf has a passenger."); System.out.println("The passenger is a player."); Player player = (Player) this.getControllingPassenger(); // Ensure the player is the controller this.setYRot(player.getYRot()); this.yRotO = this.getYRot(); this.setXRot(player.getXRot() * 0.5F); this.setRot(this.getYRot(), this.getXRot()); this.yBodyRot = this.getYRot(); this.yHeadRot = this.yBodyRot; float forward = player.zza; float strafe = player.xxa; if (forward <= 0.0F) { forward *= 0.25F; } this.flyingSpeed = this.getSpeed() * 0.1F; this.setSpeed((float) this.getAttributeValue(Attributes.MOVEMENT_SPEED) * 1.5F); this.setDeltaMovement(new Vec3(strafe, travelVector.y, forward).scale(this.getSpeed())); this.calculateEntityAnimation(this, false); } else { // The wolf does not have a passenger or the passenger is not a player System.out.println("No player is mounted, or the passenger is not a player."); super.travel(travelVector); } } public boolean hasSaddle() { return this.hasSaddle; } public void setSaddle(boolean hasSaddle) { this.hasSaddle = hasSaddle; } @Override protected void dropEquipment() { super.dropEquipment(); if (this.hasSaddle()) { this.spawnAtLocation(Items.SADDLE); this.setSaddle(false); } } @SubscribeEvent public static void onServerTick(TickEvent.ServerTickEvent event) { if (event.phase == TickEvent.Phase.START) { MinecraftServer server = net.minecraftforge.server.ServerLifecycleHooks.getCurrentServer(); if (server != null) { for (ServerPlayer player : server.getPlayerList().getPlayers()) { if (player.isPassenger() && player.getVehicle() instanceof MountableWolfEntity) { MountableWolfEntity wolf = (MountableWolfEntity) player.getVehicle(); System.out.println("Tick: " + player.getName().getString() + " is correctly mounted on " + wolf); } } } } } private boolean lastMountedState = false; @Override public void tick() { super.tick(); if (!this.level.isClientSide) { // Only on the server boolean isMounted = this.isVehicle() && this.getControllingPassenger() instanceof Player; // Only print if the state changed if (isMounted != lastMountedState) { if (isMounted) { Player player = (Player) this.getControllingPassenger(); // Verify the passenger is a player System.out.println("Server: Player " + player.getName().getString() + " is now mounted."); } else { System.out.println("Server: The wolf no longer has a passenger."); } lastMountedState = isMounted; } } } @Override public void addPassenger(Entity passenger) { super.addPassenger(passenger); if (passenger instanceof Player) { Player player = (Player) passenger; if (!this.level.isClientSide && player instanceof ServerPlayer) { // Send the packet to the server to indicate the player is mounted NetworkHandler.CHANNEL.send(PacketDistributor.PLAYER.with(() -> (ServerPlayer) player), new MountSyncPacket(true)); } } } @Override public void removePassenger(Entity passenger) { super.removePassenger(passenger); if (passenger instanceof Player) { Player player = (Player) passenger; if (!this.level.isClientSide && player instanceof ServerPlayer) { // Send the packet to the server to indicate the player is no longer mounted NetworkHandler.CHANNEL.send(PacketDistributor.PLAYER.with(() -> (ServerPlayer) player), new MountSyncPacket(false)); } } } @Override public boolean isControlledByLocalInstance() { Entity entity = this.getControllingPassenger(); return entity instanceof Player; } @Override public void positionRider(Entity passenger) { if (this.hasPassenger(passenger)) { double xOffset = Math.cos(Math.toRadians(this.getYRot() + 90)) * 0.4; double zOffset = Math.sin(Math.toRadians(this.getYRot() + 90)) * 0.4; passenger.setPos(this.getX() + xOffset, this.getY() + this.getPassengersRidingOffset() + passenger.getMyRidingOffset(), this.getZ() + zOffset); } } } MountSyncPacket package com.vals.valscraft.network; import com.vals.valscraft.entity.MountableWolfEntity; import net.minecraft.network.FriendlyByteBuf; import net.minecraft.server.level.ServerLevel; import net.minecraft.server.level.ServerPlayer; import net.minecraft.world.entity.Entity; import net.minecraft.world.entity.player.Player; import net.minecraftforge.network.NetworkEvent; import java.util.function.Supplier; public class MountSyncPacket { private final boolean isMounted; public MountSyncPacket(boolean isMounted) { this.isMounted = isMounted; } public void encode(FriendlyByteBuf buffer) { buffer.writeBoolean(isMounted); } public static MountSyncPacket decode(FriendlyByteBuf buffer) { return new MountSyncPacket(buffer.readBoolean()); } public void handle(NetworkEvent.Context context) { context.enqueueWork(() -> { ServerPlayer player = context.getSender(); // Get the player from the context if (player != null) { // Verifies if the player has dismounted if (!isMounted) { Entity vehicle = player.getVehicle(); if (vehicle instanceof MountableWolfEntity wolf) { // Logic to remove the player as a passenger wolf.removePassenger(player); System.out.println("Server: Player " + player.getName().getString() + " is no longer mounted."); } } } }); context.setPacketHandled(true); // Marks the packet as handled } } networkHandler package com.vals.valscraft.network; import com.vals.valscraft.valscraft; import net.minecraft.resources.ResourceLocation; import net.minecraftforge.network.NetworkRegistry; import net.minecraftforge.network.simple.SimpleChannel; import net.minecraftforge.network.NetworkEvent; import java.util.function.Supplier; public class NetworkHandler { private static final String PROTOCOL_VERSION = "1"; public static final SimpleChannel CHANNEL = NetworkRegistry.newSimpleChannel( new ResourceLocation(valscraft.MODID, "main"), () -> PROTOCOL_VERSION, PROTOCOL_VERSION::equals, PROTOCOL_VERSION::equals ); public static void init() { int packetId = 0; // Register the mount synchronization packet CHANNEL.registerMessage( packetId++, MountSyncPacket.class, MountSyncPacket::encode, MountSyncPacket::decode, (msg, context) -> msg.handle(context.get()) // Get the context with context.get() ); } }  
    • Do you use features of inventory profiles next (ipnext) or is there a change without it?
    • Remove rubidium - you are already using embeddium, which is a fork of rubidium
  • Topics

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.