[1.7.2] disappearing entity

knokko · August 21, 2014

I have made an entity that works as automatical cannon but the entity disappears when I leave the world.

Does anybody know how I can save the entity?

Here is the entity code:

public class EntityTowerGun extends Entity{

private String side;

public EntityTowerGun(World world, double x, double y, double z, String side) {
	super(world);
	setSize(1.0F, 1.0F);
	posX = x;
	posY = y;
	posZ = z;
	this.side = side;
}
public void onUpdate(){
	super.onUpdate();
	targetMobs();
}


@Override
protected void entityInit() {
}

@Override
protected void readEntityFromNBT(NBTTagCompound var1) {
	super.readFromNBT(var1);
}

@Override
protected void writeEntityToNBT(NBTTagCompound var1) {
	super.writeToNBT(var1);
}
public void targetMobs(){
	Entity entity = null;
	if(side == "north"){
        List list = this.worldObj.getEntitiesWithinAABB(EntityMob.class, AxisAlignedBB.getBoundingBox(posX - 3, posY - 10, posZ - 4, posX + 4, posY + 0, posZ - 1));

        for (int j = 0; j < list.size(); ++j)
        {
            Entity entity1 = (Entity)list.get(j);
            this.worldObj.spawnEntityInWorld(new EntityGunBullet(this.worldObj, posX, posY, posZ, entity1.posX, entity1.posY, entity1.posZ));
        	}
	}
	if(side == "west"){
        List list = this.worldObj.getEntitiesWithinAABB(EntityMob.class, AxisAlignedBB.getBoundingBox(posX - 4, posY - 10, posZ - 3, posX - 1, posY + 0, posZ + 4));

        for (int j = 0; j < list.size(); ++j)
        {
            Entity entity1 = (Entity)list.get(j);
            this.worldObj.spawnEntityInWorld(new EntityGunBullet(this.worldObj, posX, posY, posZ, entity1.posX, entity1.posY, entity1.posZ));
        }
	}
	if(side == "east"){
        List list = this.worldObj.getEntitiesWithinAABB(EntityMob.class, AxisAlignedBB.getBoundingBox(posX + 2, posY - 10, posZ - 3, posX + 5, posY + 0, posZ + 4));

        for (int j = 0; j < list.size(); ++j)
        {
            Entity entity1 = (Entity)list.get(j);
            this.worldObj.spawnEntityInWorld(new EntityGunBullet(this.worldObj, posX + 1, posY, posZ, entity1.posX, entity1.posY, entity1.posZ));
        }
	}
	if(side == "south"){
        List list = this.worldObj.getEntitiesWithinAABB(EntityMob.class, AxisAlignedBB.getBoundingBox(posX - 3, posY - 10, posZ + 2, posX + 4, posY + 0, posZ + 5));

        for (int j = 0; j < list.size(); ++j)
        {
            Entity entity1 = (Entity)list.get(j);
            this.worldObj.spawnEntityInWorld(new EntityGunBullet(this.worldObj, posX, posY, posZ + 1, entity1.posX, entity1.posY, entity1.posZ));
        }
	}
        
}

}

Busti · August 21, 2014

Did you spawn it on the server?

When its spawned on the server it appears to exist but wont be saved.

knokko · August 22, 2014

I didn't register it.

I think that is the problem.

Here is the way I spawn it:

world.spawnEntityInWorld(new EntityTowerGun(world, x + 0, y + 4, z + 2, "south"));
	world.spawnEntityInWorld(new EntityTowerGun(world, x - 0, y + 4, z - 2, "north"));
	world.spawnEntityInWorld(new EntityTowerGun(world, x + 2, y + 4, z + 0, "east"));
	world.spawnEntityInWorld(new EntityTowerGun(world, x - 2, y + 4, z - 0, "west"));

I am going to look how to update to 1.7.10.

knokko · August 22, 2014

Updating to 1.7.10 have caused problems, I am going to create another topic for this.

I am happy I have made a back-up before trying to update.

But for now:

I have made this EntityHandler and 1 static method:

public class EntityHandler {
public static void registerShooter(Class entityClass, String name){
	int entityId = EntityRegistry.findGlobalUniqueEntityId();
	long x = name.hashCode();
	Random random = new Random(x);
	EntityRegistry.registerGlobalEntityID(entityClass, name, entityId);
	EntityRegistry.registerModEntity(entityClass, name, entityId, KnokkoBlocks.instance, 64, 1, true);
}

}

If I try to summon the entity with this code:

world.spawnEntityInWorld(new EntityTowerGun(world, x + 0, y + 4, z + 2, "south"));
	world.spawnEntityInWorld(new EntityTowerGun(world, x - 0, y + 4, z - 2, "north"));
	world.spawnEntityInWorld(new EntityTowerGun(world, x + 2, y + 4, z + 0, "east"));
	world.spawnEntityInWorld(new EntityTowerGun(world, x - 2, y + 4, z - 0, "west"));

My world crashes and I was sended back to the title screen.

This was the report in the console:

[10:29:46] [Client thread/ERROR] [FML]: There was a critical exception handling a packet on channel FML

java.lang.RuntimeException: java.lang.NoSuchMethodException: towerdefence.entities.EntityTowerGun.<init>(net.minecraft.world.World)

at com.google.common.base.Throwables.propagate(Throwables.java:160) ~[guava-15.0.jar:?]

at cpw.mods.fml.common.network.internal.EntitySpawnHandler.spawnEntity(EntitySpawnHandler.java:121) ~[EntitySpawnHandler.class:?]

at cpw.mods.fml.common.network.internal.EntitySpawnHandler.channelRead0(EntitySpawnHandler.java:34) ~[EntitySpawnHandler.class:?]

at cpw.mods.fml.common.network.internal.EntitySpawnHandler.channelRead0(EntitySpawnHandler.java:28) ~[EntitySpawnHandler.class:?]

at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:98) ~[simpleChannelInboundHandler.class:?]

at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) ~[DefaultChannelHandlerContext.class:?]

at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) ~[DefaultChannelHandlerContext.class:?]

at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[MessageToMessageDecoder.class:?]

at io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111) ~[MessageToMessageCodec.class:?]

at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) ~[DefaultChannelHandlerContext.class:?]

at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) ~[DefaultChannelHandlerContext.class:?]

at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:785) ~[DefaultChannelPipeline.class:?]

at io.netty.channel.embedded.EmbeddedChannel.writeInbound(EmbeddedChannel.java:169) ~[EmbeddedChannel.class:?]

at cpw.mods.fml.common.network.internal.FMLProxyPacket.processPacket(FMLProxyPacket.java:80) [FMLProxyPacket.class:?]

at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:232) [NetworkManager.class:?]

at net.minecraft.client.multiplayer.PlayerControllerMP.updateController(PlayerControllerMP.java:321) [PlayerControllerMP.class:?]

at net.minecraft.client.Minecraft.runTick(Minecraft.java:1647) [Minecraft.class:?]

at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:994) [Minecraft.class:?]

at net.minecraft.client.Minecraft.run(Minecraft.java:910) [Minecraft.class:?]

at net.minecraft.client.main.Main.main(Main.java:112) [Main.class:?]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_05]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_05]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_05]

at java.lang.reflect.Method.invoke(Method.java:483) ~[?:1.8.0_05]

at net.minecraft.launchwrapper.Launch.launch(Launch.java:134) [launchwrapper-1.9.jar:?]

at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]

Caused by: java.lang.NoSuchMethodException: towerdefence.entities.EntityTowerGun.<init>(net.minecraft.world.World)

at java.lang.Class.getConstructor0(Class.java:2971) ~[?:1.8.0_05]

at java.lang.Class.getConstructor(Class.java:1812) ~[?:1.8.0_05]

at cpw.mods.fml.common.network.internal.EntitySpawnHandler.spawnEntity(EntitySpawnHandler.java:72) ~[EntitySpawnHandler.class:?]

... 24 more

[10:29:46] [server thread/INFO]: Player906 lost connection: TranslatableComponent{key='disconnect.genericReason', args=[internal Exception: java.lang.ClassCastException: net.minecraft.network.NetHandlerPlayServer cannot be cast to net.minecraft.network.play.INetHandlerPlayClient], siblings=[], style=Style{hasParent=false, color=null, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null}}

[10:29:46] [server thread/INFO]: Player906 left the game

[10:29:46] [server thread/INFO]: Stopping singleplayer server as player logged out

[10:29:46] [server thread/INFO]: Stopping server

[10:29:46] [server thread/INFO]: Saving players

[10:29:46] [server thread/INFO]: Saving worlds

[10:29:46] [server thread/INFO]: Saving chunks for level 'test wereld'/Overworld

[10:29:52] [server thread/ERROR]: Exception stopping the server

java.lang.NoClassDefFoundError: net/minecraft/entity/Entity$1

at net.minecraft.entity.Entity.addEntityCrashInfo(Entity.java:2463) ~[Entity.class:?]

at net.minecraft.entity.Entity.writeToNBT(Entity.java:1578) ~[Entity.class:?]

at net.minecraft.entity.Entity.writeToNBTOptional(Entity.java:1515) ~[Entity.class:?]

at net.minecraft.world.chunk.storage.AnvilChunkLoader.writeChunkToNBT(AnvilChunkLoader.java:299) ~[AnvilChunkLoader.class:?]

at net.minecraft.world.chunk.storage.AnvilChunkLoader.saveChunk(AnvilChunkLoader.java:132) ~[AnvilChunkLoader.class:?]

at net.minecraft.world.gen.ChunkProviderServer.safeSaveChunk(ChunkProviderServer.java:229) ~[ChunkProviderServer.class:?]

at net.minecraft.world.gen.ChunkProviderServer.saveChunks(ChunkProviderServer.java:281) ~[ChunkProviderServer.class:?]

at net.minecraft.world.WorldServer.saveAllChunks(WorldServer.java:875) ~[WorldServer.class:?]

at net.minecraft.server.MinecraftServer.saveAllWorlds(MinecraftServer.java:370) ~[MinecraftServer.class:?]

at net.minecraft.server.MinecraftServer.stopServer(MinecraftServer.java:403) ~[MinecraftServer.class:?]

at net.minecraft.server.integrated.IntegratedServer.stopServer(IntegratedServer.java:255) ~[integratedServer.class:?]

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:531) [MinecraftServer.class:?]

at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:742) [MinecraftServer$2.class:?]

[10:30:40] [server thread/INFO]: Starting integrated minecraft server version 1.7.2

[10:30:40] [server thread/INFO]: Generating keypair

[10:30:40] [server thread/INFO] [FML]: Injecting existing block and item data into this server instance

[10:30:40] [server thread/INFO] [FML]: Loading dimension 0 (test wereld) (net.minecraft.server.integrated.IntegratedServer@158b6c87)

[10:30:40] [server thread/INFO] [FML]: Loading dimension 1 (test wereld) (net.minecraft.server.integrated.IntegratedServer@158b6c87)

[10:30:40] [server thread/INFO] [FML]: Loading dimension -1 (test wereld) (net.minecraft.server.integrated.IntegratedServer@158b6c87)

[10:30:40] [server thread/INFO]: Preparing start region for level 0

[10:30:40] [Netty Client IO #1/INFO] [FML]: Server protocol version 1

[10:30:40] [Netty IO #3/INFO] [FML]: Client protocol version 1

[10:30:40] [Netty IO #3/INFO] [FML]: Client attempting to join with 4 mods : [email protected],[email protected],[email protected],[email protected]

[10:30:40] [Netty IO #3/INFO] [FML]: Attempting connection with missing mods [] at CLIENT

[10:30:40] [Netty Client IO #1/INFO] [FML]: Attempting connection with missing mods [] at SERVER

[10:30:40] [server thread/INFO] [FML]: [server thread] Server side modded connection established

[10:30:40] [server thread/INFO]: Player906[local:E:09e54a9d] logged in with entity id 234 at (54.171985872460056, 4.0, 32.67048414492105)

[10:30:40] [server thread/INFO]: Player906 joined the game

[10:30:40] [Client thread/INFO] [FML]: [Client thread] Client side modded connection established

[10:30:43] [Client thread/ERROR] [FML]: A severe problem occurred during the spawning of an entity

java.lang.NoSuchMethodException: towerdefence.entities.EntityTowerGun.<init>(net.minecraft.world.World)

at java.lang.Class.getConstructor0(Class.java:2971) ~[?:1.8.0_05]

at java.lang.Class.getConstructor(Class.java:1812) ~[?:1.8.0_05]

at cpw.mods.fml.common.network.internal.EntitySpawnHandler.spawnEntity(EntitySpawnHandler.java:72) [EntitySpawnHandler.class:?]

at cpw.mods.fml.common.network.internal.EntitySpawnHandler.channelRead0(EntitySpawnHandler.java:34) [EntitySpawnHandler.class:?]

at cpw.mods.fml.common.network.internal.EntitySpawnHandler.channelRead0(EntitySpawnHandler.java:28) [EntitySpawnHandler.class:?]

at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:98) [simpleChannelInboundHandler.class:?]

at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) [DefaultChannelHandlerContext.class:?]

at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) [DefaultChannelHandlerContext.class:?]

at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) [MessageToMessageDecoder.class:?]

at io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111) [MessageToMessageCodec.class:?]

at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) [DefaultChannelHandlerContext.class:?]

at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) [DefaultChannelHandlerContext.class:?]

at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:785) [DefaultChannelPipeline.class:?]

at io.netty.channel.embedded.EmbeddedChannel.writeInbound(EmbeddedChannel.java:169) [EmbeddedChannel.class:?]