Hey there,

 

I'm trying to sync a value when the player joins the game, however, using

EntityJoinedWorldEvent

seems to cause this on join:

// Why did you do that?

Time: 12/11/16 11:03 AM
Description: Ticking memory connection

java.lang.NullPointerException: Ticking memory connection
at com.lambda.plentifulmisc.magic.hud.ManaEvent.EntityJoinedWorldEvent(ManaEvent.java:60)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_11_ManaEvent_EntityJoinedWorldEvent_EntityJoinWorldEvent.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:185)
at net.minecraft.world.World.spawnEntityInWorld(World.java:1291)
at net.minecraft.world.WorldServer.spawnEntityInWorld(WorldServer.java:1124)
at net.minecraft.server.management.PlayerList.playerLoggedIn(PlayerList.java:386)
at net.minecraft.server.management.PlayerList.initializeConnectionToPlayer(PlayerList.java:169)
at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.completeServerSideConnection(NetworkDispatcher.java:265)
at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.access$100(NetworkDispatcher.java:73)
at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.update(NetworkDispatcher.java:214)
at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:308)
at net.minecraft.network.NetworkSystem.networkTick(NetworkSystem.java:195)
at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:817)
at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:698)
at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:156)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:547)
at java.lang.Thread.run(Thread.java:745)


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

-- Head --
Thread: Client thread
Stacktrace:
at com.lambda.plentifulmisc.magic.hud.ManaEvent.EntityJoinedWorldEvent(ManaEvent.java:60)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_11_ManaEvent_EntityJoinedWorldEvent_EntityJoinWorldEvent.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:185)
at net.minecraft.world.World.spawnEntityInWorld(World.java:1291)
at net.minecraft.world.WorldServer.spawnEntityInWorld(WorldServer.java:1124)
at net.minecraft.server.management.PlayerList.playerLoggedIn(PlayerList.java:386)
at net.minecraft.server.management.PlayerList.initializeConnectionToPlayer(PlayerList.java:169)
at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.completeServerSideConnection(NetworkDispatcher.java:265)
at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.access$100(NetworkDispatcher.java:73)
at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.update(NetworkDispatcher.java:214)
at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:308)

-- Ticking connection --
Details:
Connection: net.minecraft.network.NetworkManager@4f6404d0
Stacktrace:
at net.minecraft.network.NetworkSystem.networkTick(NetworkSystem.java:195)
at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:817)
at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:698)
at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:156)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:547)
at java.lang.Thread.run(Thread.java:745)

 

Here is the event:

    @SubscribeEvent
    public static void EntityJoinedWorldEvent(EntityJoinWorldEvent event) {
        Minecraft mc = Minecraft.getMinecraft();
        if(event.getEntity() instanceof EntityPlayer) {
            if (mc.thePlayer.hasCapability(CapabilityMagic.MANA, null)) {
                CapabilityManaData cap = mc.thePlayer.getCapability(CapabilityMagic.MANA, null);
                if (!event.isCancelable()) {
                    PlentifulMisc.network.sendTo(new ManaNetworkSyncClient(cap.getManaStored()), (EntityPlayerMP) cap.getEntity());
                }
            }
        }
    }

 

Thanks,

Why are you checking event.isCancelable() at all?

 

That said, why are you using Minecraft mc = Minecraft.getMinecraft(); on the server?  And why are you getting the player from the client side class rather than from the event? You check event.getEntity() to see if it's a player...

How would I get an instance of the server? I need to be able to access their capability.

FMLCommonHandler.instance().getMinecraftServerInstance()

Is there anyway to access the player?

Seriously?

 

if(event.getEntity() instanceof EntityPlayer) {
    EntityPlayer player = (EntityPlayer)event.getEntity();
}

 

Fuck.