I decided to make the mod I'm working on a bit fancier, so I started using particle effects.

Everything is well and good, however, one block makes problems.

As it prevents the player's death, I had to use the LivingDeathEvent, which is only fired server-side.

I want to spawn some particles when said block prevents a player's death, which isn't possible on its own when the Method is only fired

by the sever, hence I looked into packets.

With the packets everything works so far, but the strange thing is, that even though the server sends a packet to the client,

the world is still no remote (world.isRemote is false).

 

Here is the neccessary code:

 

PacketHaandler.java:

public class PacketHandler {

public static final SimpleNetworkWrapper
	NETWORK = NetworkRegistry.INSTANCE.newSimpleChannel(LibMisc.MODID);

public static void registerPackets(){
	int id = 0;
	NETWORK.registerMessage(PacketRosurrectSaved.class, PacketRosurrectSaved.class, id++, Side.CLIENT);
}

}

 

PacketRosurrectSaved.java:

public class PacketRosurrectSaved implements IMessage, IMessageHandler<PacketRosurrectSaved, IMessage>{

int 
	worldID;

double
	x,
	y,
	z;

boolean
	headBreak;

public PacketRosurrectSaved() {}

public PacketRosurrectSaved(int id, double x, double y, double z, boolean head) {
	worldID = id;
	this.x = x;
	this.y = y;
	this.z = z;
	headBreak = head;
}

@Override
public void fromBytes(ByteBuf buf) {
	worldID = buf.readInt();
	x = buf.readDouble();
	y = buf.readDouble();
	z = buf.readDouble();
	headBreak = buf.readBoolean();
}

@Override
public void toBytes(ByteBuf buf) {
	buf.writeInt(worldID);
	buf.writeDouble(x);
	buf.writeDouble(y);
	buf.writeDouble(z);
	buf.writeBoolean(headBreak);
}

@Override
public IMessage onMessage(PacketRosurrectSaved message, MessageContext ctx) {
	World world = DimensionManager.getProvider(message.worldID).worldObj; //This is the line I suspect to be the culprit, but I don't know any other way to get the World object from the dimension id
	if(!message.headBreak)
		Methods.spawnParticle("fireworksSpark", world, message.x, message.y, message.z, 10, 4, 1.0, 0.2, 0.5, 0.2);
	else
		world.playAuxSFX(2001, (int)message.x, (int)message.y, (int)message.z, Block.getIdFromBlock(world.getBlock((int)message.x, (int)message.y, (int)message.z)) + (world.getBlockMetadata((int)message.x, (int)message.y, (int)message.z)) << 12);
	return null;
}

}

 

Rosurrect.onPlayerDeath():

	@SubscribeEvent(priority = EventPriority.HIGHEST)
public void onPlayerDeath(LivingDeathEvent event){
	if(event.entity instanceof EntityPlayer){
		EntityPlayer player = (EntityPlayer) event.entity;
		int i = 0;
		for(GameProfile profile : boundPlayers){
			if(profile != null && areEqual(profile, player.getGameProfile())){
				if(mana < getMaxMana()){
					chat(player, StatCollector.translateToLocal("bu.rosurrect.failed"));
					return;
				}
				int x = supertile.xCoord + cardinals[i].offsetX;
				int y = supertile.yCoord;
				int z = supertile.zCoord + cardinals[i].offsetZ;
				event.setCanceled(true);
				player.setHealth(player.getMaxHealth());
				chat(player, StatCollector.translateToLocal("bu.rosurrect.success"));
				supertile.getWorldObj().setBlock(x, y, z, Blocks.air);
				PacketHandler.NETWORK.sendToAll(new PacketRosurrectSaved(supertile.getWorldObj().provider.dimensionId, x, y, z, true));					
				PacketHandler.NETWORK.sendToAll(new PacketRosurrectSaved(supertile.getWorldObj().provider.dimensionId, supertile.xCoord, supertile.yCoord, supertile.zCoord, false));
				mana = 0;
				return;
			}
			i++;
		}
	}
}

 

Methods.spawnParticle():

public static void spawnParticle(String tag, World world, double x, double y, double z, int max, int min, double chance, double motionXModifier, double motionYModifier, double motionZModifier){
	if(!world.isRemote || Math.random() >= chance)
		return;
	int count = world.rand.nextInt(max - min) + min;
	for(int i = 0; i < count; i++){
		world.spawnParticle(tag, x + Math.random(), y + Math.random(), z + Math.random(), world.rand.nextGaussian() * motionXModifier, world.rand.nextGaussian() * motionYModifier, world.rand.nextGaussian() * motionZModifier);
	}
}

 

1. What MC are you on? In 1.8 you need: http://greyminecraftcoder.blogspot.com.au/2015/01/thread-safety-with-network-messages.html

 

2. You got the idea wrong (with dimension and worlds).

2.1. When sending data to client about some effect, you don't send "world" - client has only ONE world, that is, the one player is currently in.

2.2 You send only x/y/z, the world you get with Minecraft.getMinecraft().theWorld (Note: have look at thread safety and @SideOnly(Side.CLIENT)

2.2.1. To bypass problem of using Minecraft (client only) class in packet handler - use proxies:

http://www.minecraftforge.net/forum/index.php/topic,32585.msg170364.html#msg170364

 

3. What else... Oh! Particles are render-stuff. Send packet about their spawn only to players around location, not all.

Welp, forgot the most important thing haha. I was on 1.7.10

 

But everything you suggested worked out, thank you for that!