Jump to content

Recommended Posts

Posted

You shouldn't be using Minecraft.getMinecraft().player. The Minecraft class doesn't exist on the server so it will cause a crash. It also bears no relation to the event you're subscribing to - instead you should get the player from the event, event#player.

Posted
34 minutes ago, Jay Avery said:

You shouldn't be using Minecraft.getMinecraft().player. The Minecraft class doesn't exist on the server so it will cause a crash. It also bears no relation to the event you're subscribing to - instead you should get the player from the event, event#player.

The relevant events here, are client-side, and hopefully called/registered in the ClientProxy.

As such, Minecraft::thePlayer & event#player would reference the exact same object.

Also previously known as eAndPi.

"Pi, is there a station coming up where we can board your train of thought?" -Kronnn

Published Mods: Underworld

Handy links: Vic_'s Forge events Own WIP Tutorials.

Posted
2 minutes ago, Matryoshika said:

The relevant events here, are client-side, and hopefully called/registered in the ClientProxy.

As such, Minecraft::thePlayer & event#player would reference the exact same object.

 

PlayerTickEvent is fired for all players (even on the client side), not just the client player.

 

If you want to do something every tick on the client, use ClientTickEvent.

  • Like 1

Please don't PM me to ask for help. Asking your question in a public thread preserves it for people who are having the same problem in the future.

Posted

It does exist Client side, but it is never saved there. If the player logs out, or the server restarts, the client's data will reset.

If you want to reliably do things Client-Side, you will need to send packets from Server->Client with the data.

  • Like 1

Also previously known as eAndPi.

"Pi, is there a station coming up where we can board your train of thought?" -Kronnn

Published Mods: Underworld

Handy links: Vic_'s Forge events Own WIP Tutorials.

Posted

I'm still unsure as to why I'm getting a NPE from this though. The capability has a boolean 'isAiming' should be false when a new capability is created. So why is it null?

Posted (edited)
1 hour ago, Allskill said:

I'm still unsure as to why I'm getting a NPE from this though. The capability has a boolean 'isAiming' should be false when a new capability is created. So why is it null?

It won't be the capability that's null, it's probably getMinecraft() or player. Step through with the debugger or use printlns if you want to find out for sure. But you don't really need to, because you don't need to be using that code at all - event#player won't be null.

Edited by Jay Avery
  • Like 1
Posted

Thanks jay, that solved my NPE on the player object. But I'm getting another on 'isAiming' which I don't understand as by default 

private boolean isAiming = false;
Posted
8 minutes ago, Allskill said:

Thanks jay, that solved my NPE on the player object. But I'm getting another on 'isAiming' which I don't understand as by default 


private boolean isAiming = false;

Which line is the NPE on? It can't be the isAiming field that's null (a primitive type can't be null no matter what), but it might be the capability itself or something else. Are you attaching the capability to the player with AttachCapabilitiesEvent<Entity>?

Posted (edited)

My method 'isAiming' has an NPE when called. I attach my capabilities here https://hastebin.com/dakozuzeyo.cs in my common proxy. The isaiming method just returns that boolean above. And is called in the PlayerTickEvent

 

ICraftZData data = event.player.getCapability(CraftZDataProvider.CRAFTZ_DATA_CAP, null);
boolean canZoom = data.isAiming();
Edited by Allskill
Posted (edited)
15 minutes ago, Allskill said:

My method 'isAiming' has an NPE when called. I attach my capabilities here https://hastebin.com/dakozuzeyo.cs in my common proxy. The isaiming method just returns that boolean above. And is called in the PlayerTickEvent

 


ICraftZData data = event.player.getCapability(CraftZDataProvider.CRAFTZ_DATA_CAP, null);
boolean canZoom = data.isAiming();

If the isAiming() method causes an NPE, that means it's being called on a null object - so the capability must be null there. I'm not sure why that would be though. Try adding a check with hasCapability, so the method is only called if the capability is definitely present.

 

Does the exception happen as soon as you start a world? Possibly the first player tick happens before capabilities are attached (I'm not sure), so it may just need to skip the first tick or few until the capability is present. If the capability is still null once the world is properly started, there must be some other issue with it.

Edited by Jay Avery
  • Like 1
Posted (edited)

The capability is null once the world is loaded. Do u know what could cause this? I register the capability with 

CapabilityManager.INSTANCE.register(ICraftZData.class, new CraftZDataStorage(), new CraftZData.Factory());

in my common proxy

Edited by Allskill
Posted (edited)

I can't see any obvious reason for it. I'd probably start by throwing printlns all over the place in the capability construction and attachment, to see whether it's actually being made and attached in the first place.

Edited by Jay Avery

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.