WorldServer.java

package net.minecraft.server;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Random;
import java.util.Set;
import java.util.TreeSet;

import net.minecraft.util.com.google.common.collect.Lists;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

public class WorldServer extends World {

    private static final Logger a = LogManager.getLogger();
    private final MinecraftServer server;
    private final EntityTracker tracker;
    private final PlayerChunkMap manager;
    private Set M;
    private TreeSet N;
    public ChunkProviderServer chunkProviderServer;
    public boolean savingDisabled;
    private boolean O;
    private int emptyTime;
    private final PortalTravelAgent Q;
    private final SpawnerCreature R = new SpawnerCreature();
    private BlockActionDataList[] S = new BlockActionDataList[] { new BlockActionDataList((BananaAPI) null), new BlockActionDataList((BananaAPI) null)};
    private int T;
    private static final StructurePieceTreasure[] U = new StructurePieceTreasure[] { new StructurePieceTreasure(Items.STICK, 0, 1, 3, 10), new StructurePieceTreasure(Item.getItemOf(Blocks.WOOD), 0, 1, 3, 10), new StructurePieceTreasure(Item.getItemOf(Blocks.LOG), 0, 1, 3, 10), new StructurePieceTreasure(Items.STONE_AXE, 0, 1, 1, 3), new StructurePieceTreasure(Items.WOOD_AXE, 0, 1, 1, 5), new StructurePieceTreasure(Items.STONE_PICKAXE, 0, 1, 1, 3), new StructurePieceTreasure(Items.WOOD_PICKAXE, 0, 1, 1, 5), new StructurePieceTreasure(Items.APPLE, 0, 2, 3, 5), new StructurePieceTreasure(Items.BREAD, 0, 2, 3, 3), new StructurePieceTreasure(Item.getItemOf(Blocks.LOG2), 0, 1, 3, 10)};
    private List V = new ArrayList();
    private IntHashMap entitiesById;

    public WorldServer(MinecraftServer minecraftserver, IDataManager idatamanager, String s, int i, WorldSettings worldsettings, MethodProfiler methodprofiler) {
        super(idatamanager, s, worldsettings, WorldProvider.byDimension(i), methodprofiler);
        this.server = minecraftserver;
        this.tracker = new EntityTracker(this);
        this.manager = new PlayerChunkMap(this);
        if (this.entitiesById == null) {
            this.entitiesById = new IntHashMap();
        }

        if (this.M == null) {
            this.M = new HashSet();
        }

        if (this.N == null) {
            this.N = new TreeSet();
        }

        this.Q = new PortalTravelAgent(this);
        this.scoreboard = new ScoreboardServer(minecraftserver);
        PersistentScoreboard persistentscoreboard = (PersistentScoreboard) this.worldMaps.get(PersistentScoreboard.class, "scoreboard");

        if (persistentscoreboard == null) {
            persistentscoreboard = new PersistentScoreboard();
            this.worldMaps.a("scoreboard", persistentscoreboard);
        }

        persistentscoreboard.a(this.scoreboard);
        ((ScoreboardServer) this.scoreboard).a(persistentscoreboard);
    }

    public void doTick() {
        super.doTick();
        if (this.getWorldData().isHardcore() && this.difficulty != EnumDifficulty.HARD) {
            this.difficulty = EnumDifficulty.HARD;
        }

        this.worldProvider.e.b();
        if (this.everyoneDeeplySleeping()) {
            if (this.getGameRules().getBoolean("doDaylightCycle")) {
                long i = this.worldData.getDayTime() + 24000L;

                this.worldData.setDayTime(i - i % 24000L);
            }

            this.d();
        }

        this.methodProfiler.a("mobSpawner");
        if (this.getGameRules().getBoolean("doMobSpawning")) {
            this.R.spawnEntities(this, this.allowMonsters, this.allowAnimals, this.worldData.getTime() % 400L == 0L);
        }

        this.methodProfiler.c("chunkSource");
        this.chunkProvider.unloadChunks();
        int j = this.a(1.0F);

        if (j != this.j) {
            this.j = j;
        }

        this.worldData.setTime(this.worldData.getTime() + 1L);
        if (this.getGameRules().getBoolean("doDaylightCycle")) {
            this.worldData.setDayTime(this.worldData.getDayTime() + 1L);
        }

        this.methodProfiler.c("tickPending");
        this.a(false);
        this.methodProfiler.c("tickBlocks");
        this.g();
        this.methodProfiler.c("chunkMap");
        this.manager.flush();
        this.methodProfiler.c("village");
        this.villages.tick();
        this.siegeManager.a();
        this.methodProfiler.c("portalForcer");
        this.Q.a(this.getTime());
        this.methodProfiler.b();
        this.Z();
    }

    public BiomeMeta a(EnumCreatureType enumcreaturetype, int i, int j, int k) {
        List list = this.L().getMobsFor(enumcreaturetype, i, j, k);

        return list != null && !list.isEmpty() ? (BiomeMeta) WeightedRandom.a(this.random, (Collection) list) : null;
    }

    public void everyoneSleeping() {
        this.O = !this.players.isEmpty();
        Iterator iterator = this.players.iterator();

        while (iterator.hasNext()) {
            EntityHuman entityhuman = (EntityHuman) iterator.next();

            if (!entityhuman.isSleeping()) {
                this.O = false;
                break;
            }
        }
    }

    protected void d() {
        this.O = false;
        Iterator iterator = this.players.iterator();

        while (iterator.hasNext()) {
            EntityHuman entityhuman = (EntityHuman) iterator.next();

            if (entityhuman.isSleeping()) {
                entityhuman.a(false, false, true);
            }
        }

        this.Y();
    }

    private void Y() {
        this.worldData.setWeatherDuration(0);
        this.worldData.setStorm(false);
        this.worldData.setThunderDuration(0);
        this.worldData.setThundering(false);
    }

    public boolean everyoneDeeplySleeping() {
        if (this.O && !this.isStatic) {
            Iterator iterator = this.players.iterator();

            EntityHuman entityhuman;

            do {
                if (!iterator.hasNext()) {
                    return true;
                }

                entityhuman = (EntityHuman) iterator.next();
            } while (entityhuman.isDeeplySleeping());

            return false;
        } else {
            return false;
        }
    }

    protected void g() {
        super.g();
        int i = 0;
        int j = 0;
        Iterator iterator = this.chunkTickList.iterator();

        while (iterator.hasNext()) {
            ChunkCoordIntPair chunkcoordintpair = (ChunkCoordIntPair) iterator.next();
            int k = chunkcoordintpair.x * 16;
            int l = chunkcoordintpair.z * 16;

            this.methodProfiler.a("getChunk");
            Chunk chunk = this.getChunkAt(chunkcoordintpair.x, chunkcoordintpair.z);

            this.a(k, l, chunk);
            this.methodProfiler.c("tickChunk");
            chunk.b(false);
            this.methodProfiler.c("thunder");
            int i1;
            int j1;
            int k1;
            int l1;

            if (this.random.nextInt(100000) == 0 && this.Q() && this.P()) {
                this.k = this.k * 3 + 1013904223;
                i1 = this.k >> 2;
                j1 = k + (i1 & 15);
                k1 = l + (i1 >> 8 & 15);
                l1 = this.h(j1, k1);
                if (this.isRainingAt(j1, l1, k1)) {
                    this.strikeLightning(new EntityLightning(this, (double) j1, (double) l1, (double) k1));
                }
            }

            this.methodProfiler.c("iceandsnow");
            if (this.random.nextInt(16) == 0) {
                this.k = this.k * 3 + 1013904223;
                i1 = this.k >> 2;
                j1 = i1 & 15;
                k1 = i1 >> 8 & 15;
                l1 = this.h(j1 + k, k1 + l);
                if (this.s(j1 + k, l1 - 1, k1 + l)) {
                    this.setTypeUpdate(j1 + k, l1 - 1, k1 + l, Blocks.ICE);
                }

                if (this.Q() && this.e(j1 + k, l1, k1 + l, true)) {
                    this.setTypeUpdate(j1 + k, l1, k1 + l, Blocks.SNOW);
                }

                if (this.Q()) {
                    BiomeBase biomebase = this.getBiome(j1 + k, k1 + l);

                    if (biomebase.e()) {
                        this.getType(j1 + k, l1 - 1, k1 + l).l(this, j1 + k, l1 - 1, k1 + l);
                    }
                }
            }

            this.methodProfiler.c("tickBlocks");
            ChunkSection[] achunksection = chunk.getSections();

            j1 = achunksection.length;

            for (k1 = 0; k1 < j1; ++k1) {
                ChunkSection chunksection = achunksection[k1];

                if (chunksection != null && chunksection.shouldTick()) {
                    for (int i2 = 0; i2 < 3; ++i2) {
                        this.k = this.k * 3 + 1013904223;
                        int j2 = this.k >> 2;
                        int k2 = j2 & 15;
                        int l2 = j2 >> 8 & 15;
                        int i3 = j2 >> 16 & 15;

                        ++j;
                        Block block = chunksection.getTypeId(k2, i3, l2);

                        if (block.isTicking()) {
                            ++i;
                            block.a(this, k2 + k, i3 + chunksection.getYPosition(), l2 + l, this.random);
                        }
                    }
                }
            }

            this.methodProfiler.b();
        }
    }

    public boolean a(int i, int j, int k, Block block) {
        NextTickListEntry nextticklistentry = new NextTickListEntry(i, j, k, block);

        return this.V.contains(nextticklistentry);
    }

    public void a(int i, int j, int k, Block block, int l) {
        this.a(i, j, k, block, l, 0);
    }

    public void a(int i, int j, int k, Block block, int l, int i1) {
        NextTickListEntry nextticklistentry = new NextTickListEntry(i, j, k, block);
        byte b0 = 0;

        if (this.d && block.getMaterial() != Material.AIR) {
            if (block.L()) {
                b0 = 8;
                if (this.b(nextticklistentry.a - b0, nextticklistentry.b - b0, nextticklistentry.c - b0, nextticklistentry.a + b0, nextticklistentry.b + b0, nextticklistentry.c + b0)) {
                    Block block1 = this.getType(nextticklistentry.a, nextticklistentry.b, nextticklistentry.c);

                    if (block1.getMaterial() != Material.AIR && block1 == nextticklistentry.a()) {
                        block1.a(this, nextticklistentry.a, nextticklistentry.b, nextticklistentry.c, this.random);
                    }
                }

                return;
            }

            l = 1;
        }

        if (this.b(i - b0, j - b0, k - b0, i + b0, j + b0, k + b0)) {
            if (block.getMaterial() != Material.AIR) {
                nextticklistentry.a((long) l + this.worldData.getTime());
                nextticklistentry.a(i1);
            }

            if (!this.M.contains(nextticklistentry)) {
                this.M.add(nextticklistentry);
                this.N.add(nextticklistentry);
            }
        }
    }

    public void b(int i, int j, int k, Block block, int l, int i1) {
        NextTickListEntry nextticklistentry = new NextTickListEntry(i, j, k, block);

        nextticklistentry.a(i1);
        if (block.getMaterial() != Material.AIR) {
            nextticklistentry.a((long) l + this.worldData.getTime());
        }

        if (!this.M.contains(nextticklistentry)) {
            this.M.add(nextticklistentry);
            this.N.add(nextticklistentry);
        }
    }

    public void tickEntities() {
        if (this.players.isEmpty()) {
            if (this.emptyTime++ >= 1200) {
                return;
            }
        } else {
            this.i();
        }

        super.tickEntities();
    }

    public void i() {
        this.emptyTime = 0;
    }

    public boolean a(boolean flag) {
        int i = this.N.size();

        if (i != this.M.size()) {
            throw new IllegalStateException("TickNextTick list out of synch");
        } else {
            if (i > 1000) {
                i = 1000;
            }

            this.methodProfiler.a("cleaning");

            NextTickListEntry nextticklistentry;

            for (int j = 0; j < i; ++j) {
                nextticklistentry = (NextTickListEntry) this.N.first();
                if (!flag && nextticklistentry.d > this.worldData.getTime()) {
                    break;
                }

                this.N.remove(nextticklistentry);
                this.M.remove(nextticklistentry);
                this.V.add(nextticklistentry);
            }

            this.methodProfiler.b();
            this.methodProfiler.a("ticking");
            Iterator iterator = this.V.iterator();

            while (iterator.hasNext()) {
                nextticklistentry = (NextTickListEntry) iterator.next();
                iterator.remove();
                byte b0 = 0;

                if (this.b(nextticklistentry.a - b0, nextticklistentry.b - b0, nextticklistentry.c - b0, nextticklistentry.a + b0, nextticklistentry.b + b0, nextticklistentry.c + b0)) {
                    Block block = this.getType(nextticklistentry.a, nextticklistentry.b, nextticklistentry.c);

                    if (block.getMaterial() != Material.AIR && Block.a(block, nextticklistentry.a())) {
                        try {
                            block.a(this, nextticklistentry.a, nextticklistentry.b, nextticklistentry.c, this.random);
                        } catch (Throwable throwable) {
                            CrashReport crashreport = CrashReport.a(throwable, "Exception while ticking a block");
                            CrashReportSystemDetails crashreportsystemdetails = crashreport.a("Block being ticked");

                            int k;

                            try {
                                k = this.getData(nextticklistentry.a, nextticklistentry.b, nextticklistentry.c);
                            } catch (Throwable throwable1) {
                                k = -1;
                            }

                            CrashReportSystemDetails.a(crashreportsystemdetails, nextticklistentry.a, nextticklistentry.b, nextticklistentry.c, block, k);
                            throw new ReportedException(crashreport);
                        }
                    }
                } else {
                    this.a(nextticklistentry.a, nextticklistentry.b, nextticklistentry.c, nextticklistentry.a(), 0);
                }
            }

            this.methodProfiler.b();
            this.V.clear();
            return !this.N.isEmpty();
        }
    }

    public List a(Chunk chunk, boolean flag) {
        ArrayList arraylist = null;
        ChunkCoordIntPair chunkcoordintpair = chunk.l();
        int i = (chunkcoordintpair.x << 4) - 2;
        int j = i + 16 + 2;
        int k = (chunkcoordintpair.z << 4) - 2;
        int l = k + 16 + 2;

        for (int i1 = 0; i1 < 2; ++i1) {
            Iterator iterator;

            if (i1 == 0) {
                iterator = this.N.iterator();
            } else {
                iterator = this.V.iterator();
                if (!this.V.isEmpty()) {
                    a.debug("toBeTicked = " + this.V.size());
                }
            }

            while (iterator.hasNext()) {
                NextTickListEntry nextticklistentry = (NextTickListEntry) iterator.next();

                if (nextticklistentry.a >= i && nextticklistentry.a < j && nextticklistentry.c >= k && nextticklistentry.c < l) {
                    if (flag) {
                        this.M.remove(nextticklistentry);
                        iterator.remove();
                    }

                    if (arraylist == null) {
                        arraylist = new ArrayList();
                    }

                    arraylist.add(nextticklistentry);
                }
            }
        }

        return arraylist;
    }

    public void entityJoinedWorld(Entity entity, boolean flag) {
        if (!this.server.getSpawnAnimals() && (entity instanceof EntityAnimal || entity instanceof EntityWaterAnimal)) {
            entity.die();
        }

        if (!this.server.getSpawnNPCs() && entity instanceof NPC) {
            entity.die();
        }

        super.entityJoinedWorld(entity, flag);
    }

    protected IChunkProvider j() {
        IChunkLoader ichunkloader = this.dataManager.createChunkLoader(this.worldProvider);

        this.chunkProviderServer = new ChunkProviderServer(this, ichunkloader, this.worldProvider.getChunkProvider());
        return this.chunkProviderServer;
    }

    public List getTileEntities(int i, int j, int k, int l, int i1, int j1) {
        ArrayList arraylist = new ArrayList();

        for (int k1 = 0; k1 < this.tileEntityList.size(); ++k1) {
            TileEntity tileentity = (TileEntity) this.tileEntityList.get(k1);

            if (tileentity.x >= i && tileentity.y >= j && tileentity.z >= k && tileentity.x < l && tileentity.y < i1 && tileentity.z < j1) {
                arraylist.add(tileentity);
            }
        }

        return arraylist;
    }

    public boolean a(EntityHuman entityhuman, int i, int j, int k) {
        return !this.server.a(this, i, j, k, entityhuman);
    }

    protected void a(WorldSettings worldsettings) {
        if (this.entitiesById == null) {
            this.entitiesById = new IntHashMap();
        }

        if (this.M == null) {
            this.M = new HashSet();
        }

        if (this.N == null) {
            this.N = new TreeSet();
        }

        this.b(worldsettings);
        super.a(worldsettings);
    }

    protected void b(WorldSettings worldsettings) {
        if (!this.worldProvider.e()) {
            this.worldData.setSpawn(0, this.worldProvider.getSeaLevel(), 0);
        } else {
            this.isLoading = true;
            WorldChunkManager worldchunkmanager = this.worldProvider.e;
            List list = worldchunkmanager.a();
            Random random = new Random(this.getSeed());
            ChunkPosition chunkposition = worldchunkmanager.a(0, 0, 256, list, random);
            int i = 0;
            int j = this.worldProvider.getSeaLevel();
            int k = 0;

            if (chunkposition != null) {
                i = chunkposition.x;
                k = chunkposition.z;
            } else {
                a.warn("Unable to find spawn biome");
            }

            int l = 0;

            while (!this.worldProvider.canSpawn(i, k)) {
                i += random.nextInt(64) - random.nextInt(64);
                k += random.nextInt(64) - random.nextInt(64);
                ++l;
                if (l == 1000) {
                    break;
                }
            }

            this.worldData.setSpawn(i, j, k);
            this.isLoading = false;
            if (worldsettings.c()) {
                this.k();
            }
        }
    }

    protected void k() {
        WorldGenBonusChest worldgenbonuschest = new WorldGenBonusChest(U, 10);

        for (int i = 0; i < 10; ++i) {
            int j = this.worldData.c() + this.random.nextInt(6) - this.random.nextInt(6);
            int k = this.worldData.e() + this.random.nextInt(6) - this.random.nextInt(6);
            int l = this.i(j, k) + 1;

            if (worldgenbonuschest.generate(this, this.random, j, l, k)) {
                break;
            }
        }
    }

    public ChunkCoordinates getDimensionSpawn() {
        return this.worldProvider.h();
    }

    public void save(boolean flag, IProgressUpdate iprogressupdate) {
        if (this.chunkProvider.canSave()) {
            if (iprogressupdate != null) {
                iprogressupdate.a("Saving level");
            }

            this.a();
            if (iprogressupdate != null) {
                iprogressupdate.c("Saving chunks");
            }

            this.chunkProvider.saveChunks(flag, iprogressupdate);
            ArrayList arraylist = Lists.newArrayList(this.chunkProviderServer.a());
            Iterator iterator = arraylist.iterator();

            while (iterator.hasNext()) {
                Chunk chunk = (Chunk) iterator.next();

                if (chunk != null && !this.manager.a(chunk.locX, chunk.locZ)) {
                    this.chunkProviderServer.queueUnload(chunk.locX, chunk.locZ);
                }
            }
        }
    }

    public void flushSave() {
        if (this.chunkProvider.canSave()) {
            this.chunkProvider.c();
        }
    }

    protected void a() {
        this.G();
        this.dataManager.saveWorldData(this.worldData, this.server.getPlayerList().t());
        this.worldMaps.a();
    }

    protected void a(Entity entity) {
        super.a(entity);
        this.entitiesById.a(entity.getId(), entity);
        Entity[] aentity = entity.at();

        if (aentity != null) {
            for (int i = 0; i < aentity.length; ++i) {
                this.entitiesById.a(aentity[i].getId(), aentity[i]);
            }
        }
    }

    protected void b(Entity entity) {
        super.b(entity);
        this.entitiesById.d(entity.getId());
        Entity[] aentity = entity.at();

        if (aentity != null) {
            for (int i = 0; i < aentity.length; ++i) {
                this.entitiesById.d(aentity[i].getId());
            }
        }
    }

    public Entity getEntity(int i) {
        return (Entity) this.entitiesById.get(i);
    }

    public boolean strikeLightning(Entity entity) {
        if (super.strikeLightning(entity)) {
            this.server.getPlayerList().sendPacketNearby(entity.locX, entity.locY, entity.locZ, 512.0D, this.worldProvider.dimension, new PacketPlayOutSpawnEntityWeather(entity));
            return true;
        } else {
            return false;
        }
    }

    public void broadcastEntityEffect(Entity entity, byte b0) {
        this.getTracker().sendPacketToEntity(entity, new PacketPlayOutEntityStatus(entity, b0));
    }

    public Explosion createExplosion(Entity entity, double d0, double d1, double d2, float f, boolean flag, boolean flag1) {
        Explosion explosion = new Explosion(this, entity, d0, d1, d2, f);

        explosion.a = flag;
        explosion.b = flag1;
        explosion.a();
        explosion.a(false);
        if (!flag1) {
            explosion.blocks.clear();
        }

        Iterator iterator = this.players.iterator();

        while (iterator.hasNext()) {
            EntityHuman entityhuman = (EntityHuman) iterator.next();

            if (entityhuman.e(d0, d1, d2) < 4096.0D) {
                ((EntityPlayer) entityhuman).playerConnection.sendPacket(new PacketPlayOutExplosion(d0, d1, d2, f, explosion.blocks, (Vec3D) explosion.b().get(entityhuman)));
            }
        }

        return explosion;
    }

    public void playBlockAction(int i, int j, int k, Block block, int l, int i1) {
        BlockActionData blockactiondata = new BlockActionData(i, j, k, block, l, i1);
        Iterator iterator = this.S[this.T].iterator();

        BlockActionData blockactiondata1;

        do {
            if (!iterator.hasNext()) {
                this.S[this.T].add(blockactiondata);
                return;
            }

            blockactiondata1 = (BlockActionData) iterator.next();
        } while (!blockactiondata1.equals(blockactiondata));

    }

    private void Z() {
        while (!this.S[this.T].isEmpty()) {
            int i = this.T;

            this.T ^= 1;
            Iterator iterator = this.S[i].iterator();

            while (iterator.hasNext()) {
                BlockActionData blockactiondata = (BlockActionData) iterator.next();

                if (this.a(blockactiondata)) {
                    this.server.getPlayerList().sendPacketNearby((double) blockactiondata.a(), (double) blockactiondata.b(), (double) blockactiondata.c(), 64.0D, this.worldProvider.dimension, new PacketPlayOutBlockAction(blockactiondata.a(), blockactiondata.b(), blockactiondata.c(), blockactiondata.f(), blockactiondata.d(), blockactiondata.e()));
                }
            }

            this.S[i].clear();
        }
    }

    private boolean a(BlockActionData blockactiondata) {
        Block block = this.getType(blockactiondata.a(), blockactiondata.b(), blockactiondata.c());

        return block == blockactiondata.f() ? block.a(this, blockactiondata.a(), blockactiondata.b(), blockactiondata.c(), blockactiondata.d(), blockactiondata.e()) : false;
    }

    public void saveLevel() {
        this.dataManager.a();
    }

    protected void o() {
        boolean flag = this.Q();

        super.o();
        if (this.m != this.n) {
            this.server.getPlayerList().a(new PacketPlayOutGameStateChange(7, this.n), this.worldProvider.dimension);
        }

        if (this.o != this.p) {
            this.server.getPlayerList().a(new PacketPlayOutGameStateChange(8, this.p), this.worldProvider.dimension);
        }

        if (flag != this.Q()) {
            if (flag) {
                this.server.getPlayerList().sendAll(new PacketPlayOutGameStateChange(2, 0.0F));
            } else {
                this.server.getPlayerList().sendAll(new PacketPlayOutGameStateChange(1, 0.0F));
            }

            this.server.getPlayerList().sendAll(new PacketPlayOutGameStateChange(7, this.n));
            this.server.getPlayerList().sendAll(new PacketPlayOutGameStateChange(8, this.p));
        }
    }

    protected int p() {
        return this.server.getPlayerList().s();
    }

    public MinecraftServer getMinecraftServer() {
        return this.server;
    }

    public EntityTracker getTracker() {
        return this.tracker;
    }

    public PlayerChunkMap getPlayerChunkMap() {
        return this.manager;
    }

    public PortalTravelAgent getTravelAgent() {
        return this.Q;
    }

    public void a(String s, double d0, double d1, double d2, int i, double d3, double d4, double d5, double d6) {
        PacketPlayOutWorldParticles packetplayoutworldparticles = new PacketPlayOutWorldParticles(s, (float) d0, (float) d1, (float) d2, (float) d3, (float) d4, (float) d5, (float) d6, i);

        for (int j = 0; j < this.players.size(); ++j) {
            EntityPlayer entityplayer = (EntityPlayer) this.players.get(j);
            ChunkCoordinates chunkcoordinates = entityplayer.getChunkCoordinates();
            double d7 = d0 - (double) chunkcoordinates.x;
            double d8 = d1 - (double) chunkcoordinates.y;
            double d9 = d2 - (double) chunkcoordinates.z;
            double d10 = d7 * d7 + d8 * d8 + d9 * d9;

            if (d10 <= 256.0D) {
                entityplayer.playerConnection.sendPacket(packetplayoutworldparticles);
            }
        }
    }
}