Flappy packets.

- Instead of sending the entire tile entity (and maybe even chunk), send just what we need to.
 - Avoids unnecessary chunk rebuilds when flaps flap.
 - Beginning of a larger process to replace calls to SyncedTileEntity#sendData

src/main/java/com/simibubi/create/content/logistics/block/belts/tunnel/BeltTunnelInstance.java

@@ -3,7 +3,7 @@ package com.simibubi.create.content.logistics.block.belts.tunnel;
 import com.simibubi.create.AllBlockPartials;
 import com.simibubi.create.content.contraptions.base.KineticRenderMaterials;
 import com.simibubi.create.content.logistics.block.FlapData;
-import com.simibubi.create.foundation.gui.widgets.InterpolatedChasingValue;
+import com.simibubi.create.foundation.gui.widgets.InterpolatedValue;
 import com.simibubi.create.foundation.render.backend.instancing.*;
 import com.simibubi.create.foundation.utility.AnimationTickHolder;
 import net.minecraft.tileentity.TileEntityType;
@@ -73,7 +73,7 @@ public class BeltTunnelInstance extends TileEntityInstance<BeltTunnelTileEntity>
     @Override
     public void tick() {
         tunnelFlaps.forEach((direction, keys) -> {
-            InterpolatedChasingValue flapValue = tile.flaps.get(direction);
+            InterpolatedValue flapValue = tile.flaps.get(direction);
             if (flapValue == null) {
                 return;
             }

src/main/java/com/simibubi/create/content/logistics/block/belts/tunnel/BeltTunnelTileEntity.java

@@ -3,6 +3,9 @@ package com.simibubi.create.content.logistics.block.belts.tunnel;
 import java.util.*;
 
 import com.simibubi.create.CreateClient;
+import com.simibubi.create.content.logistics.packet.TunnelFlapPacket;
+import com.simibubi.create.foundation.gui.widgets.InterpolatedChasingValue;
+import com.simibubi.create.foundation.networking.AllPackets;
 import com.simibubi.create.foundation.render.backend.FastRenderDispatcher;
 import com.simibubi.create.foundation.render.backend.instancing.IInstanceRendered;
 import net.minecraftforge.api.distmarker.Dist;
@@ -12,7 +15,6 @@ import org.apache.commons.lang3.tuple.Pair;
 import com.simibubi.create.AllBlocks;
 import com.simibubi.create.content.logistics.block.belts.tunnel.BeltTunnelBlock.Shape;
 import com.simibubi.create.content.logistics.block.funnel.BeltFunnelBlock;
-import com.simibubi.create.foundation.gui.widgets.InterpolatedChasingValue;
 import com.simibubi.create.foundation.tileEntity.SmartTileEntity;
 import com.simibubi.create.foundation.tileEntity.TileEntityBehaviour;
 import com.simibubi.create.foundation.utility.Iterate;
@@ -68,22 +70,6 @@ public class BeltTunnelTileEntity extends SmartTileEntity implements IInstanceRe
 		compound.put("Sides", sidesNBT);
 		
 		super.write(compound, clientPacket);
-
-		if (!clientPacket)
-			return;
-
-		flapsNBT = new ListNBT();
-		if (!flapsToSend.isEmpty()) {
-			for (Pair<Direction, Boolean> pair : flapsToSend) {
-				CompoundNBT flap = new CompoundNBT();
-				flap.putInt("Flap", pair.getKey()
-					.getIndex());
-				flap.putBoolean("FlapInward", pair.getValue());
-				flapsNBT.add(flap);
-			}
-			compound.put("TriggerFlaps", flapsNBT);
-			flapsToSend.clear();
-		}
 	}
 
 	@Override
@@ -116,17 +102,6 @@ public class BeltTunnelTileEntity extends SmartTileEntity implements IInstanceRe
 
 		if (clientPacket)
 			DistExecutor.runWhenOn(Dist.CLIENT, () -> () -> FastRenderDispatcher.enqueueUpdate(this));
-
-		if (!clientPacket)
-			return;
-		if (!compound.contains("TriggerFlaps"))
-			return;
-		flapsNBT = compound.getList("TriggerFlaps", NBT.TAG_COMPOUND);
-		for (INBT inbt : flapsNBT) {
-			CompoundNBT flap = (CompoundNBT) inbt;
-			Direction side = Direction.byIndex(flap.getInt("Flap"));
-			flap(side, flap.getBoolean("FlapInward"));
-		}
 	}
 
 	public void updateTunnelConnections() {
@@ -158,8 +133,8 @@ public class BeltTunnelTileEntity extends SmartTileEntity implements IInstanceRe
 					continue;
 
 			flaps.put(direction, new InterpolatedChasingValue().start(.25f)
-				.target(0)
+															   .target(0)
-				.withSpeed(.05f));
+															   .withSpeed(.05f));
 		}
 		sendData();
 	}
@@ -188,12 +163,18 @@ public class BeltTunnelTileEntity extends SmartTileEntity implements IInstanceRe
 		super.tick();
 		if (!world.isRemote) {
 			if (!flapsToSend.isEmpty())
-				sendData();
+				sendFlaps();
 			return;
 		}
 		flaps.forEach((d, value) -> value.tick());
 	}
 
+	private void sendFlaps() {
+		AllPackets.channel.send(packetTarget(), new TunnelFlapPacket(this, flapsToSend));
+
+		flapsToSend.clear();
+	}
+
 	@Override
 	public void addBehaviours(List<TileEntityBehaviour> behaviours) {}
 

src/main/java/com/simibubi/create/content/logistics/block/funnel/FunnelTileEntity.java

@@ -12,9 +12,12 @@ import com.simibubi.create.content.contraptions.relays.belt.BeltTileEntity;
 import com.simibubi.create.content.contraptions.relays.belt.transport.TransportedItemStack;
 import com.simibubi.create.content.logistics.block.chute.ChuteTileEntity;
 import com.simibubi.create.content.logistics.block.funnel.BeltFunnelBlock.Shape;
+import com.simibubi.create.content.logistics.packet.FunnelFlapPacket;
+import com.simibubi.create.content.logistics.packet.TunnelFlapPacket;
 import com.simibubi.create.foundation.config.AllConfigs;
 import com.simibubi.create.foundation.gui.widgets.InterpolatedChasingValue;
 import com.simibubi.create.foundation.item.TooltipHelper;
+import com.simibubi.create.foundation.networking.AllPackets;
 import com.simibubi.create.foundation.render.backend.FastRenderDispatcher;
 import com.simibubi.create.foundation.render.backend.instancing.IInstanceRendered;
 import com.simibubi.create.foundation.tileEntity.SmartTileEntity;
@@ -39,6 +42,7 @@ import net.minecraft.util.math.Vec3d;
 import net.minecraftforge.api.distmarker.Dist;
 import net.minecraftforge.common.util.LazyOptional;
 import net.minecraftforge.fml.DistExecutor;
+import net.minecraftforge.fml.network.PacketDistributor;
 import net.minecraftforge.items.CapabilityItemHandler;
 import net.minecraftforge.items.IItemHandler;
 
@@ -50,7 +54,6 @@ public class FunnelTileEntity extends SmartTileEntity implements IHaveHoveringIn
 
 	private WeakReference<ItemEntity> lastObserved; // In-world Extractors only
 
-	int sendFlap;
 	InterpolatedChasingValue flap;
 
 	static enum Mode {
@@ -285,8 +288,11 @@ public class FunnelTileEntity extends SmartTileEntity implements IHaveHoveringIn
 	}
 
 	public void flap(boolean inward) {
-		sendFlap = inward ? 1 : -1;
+		if (!world.isRemote) {
-		sendData();
+			AllPackets.channel.send(packetTarget(), new FunnelFlapPacket(this, inward));
+		} else {
+			flap.set(inward ? 1 : -1);
+		}
 	}
 
 	public boolean hasFlap() {
@@ -318,20 +324,12 @@ public class FunnelTileEntity extends SmartTileEntity implements IHaveHoveringIn
 	protected void write(CompoundNBT compound, boolean clientPacket) {
 		super.write(compound, clientPacket);
 		compound.putInt("TransferCooldown", extractionCooldown);
-		if (clientPacket && sendFlap != 0) {
-			compound.putInt("Flap", sendFlap);
-			sendFlap = 0;
-		}
 	}
 
 	@Override
 	protected void read(CompoundNBT compound, boolean clientPacket) {
 		super.read(compound, clientPacket);
 		extractionCooldown = compound.getInt("TransferCooldown");
-		if (clientPacket && compound.contains("Flap")) {
-			int direction = compound.getInt("Flap");
-			flap.set(direction);
-		}
 
 		if (clientPacket)
 			DistExecutor.runWhenOn(Dist.CLIENT, () -> () -> FastRenderDispatcher.enqueueUpdate(this));

src/main/java/com/simibubi/create/content/logistics/packet/FunnelFlapPacket.java

@@ -0,0 +1,33 @@
+package com.simibubi.create.content.logistics.packet;
+
+import com.simibubi.create.content.logistics.block.belts.tunnel.BeltTunnelTileEntity;
+import com.simibubi.create.content.logistics.block.funnel.FunnelTileEntity;
+import com.simibubi.create.foundation.networking.TileEntityDataPacket;
+import net.minecraft.network.PacketBuffer;
+import net.minecraft.util.Direction;
+
+public class FunnelFlapPacket extends TileEntityDataPacket<FunnelTileEntity> {
+
+    private final boolean inwards;
+
+    public FunnelFlapPacket(PacketBuffer buffer) {
+        super(buffer);
+
+        inwards = buffer.readBoolean();
+    }
+
+    public FunnelFlapPacket(FunnelTileEntity tile, boolean inwards) {
+        super(tile.getPos());
+        this.inwards = inwards;
+    }
+
+    @Override
+    protected void writeData(PacketBuffer buffer) {
+        buffer.writeBoolean(inwards);
+    }
+
+    @Override
+    protected void handlePacket(FunnelTileEntity tile) {
+        tile.flap(inwards);
+    }
+}

src/main/java/com/simibubi/create/content/logistics/packet/TunnelFlapPacket.java

@@ -0,0 +1,62 @@
+package com.simibubi.create.content.logistics.packet;
+
+import com.simibubi.create.content.logistics.block.belts.tunnel.BeltTunnelInstance;
+import com.simibubi.create.content.logistics.block.belts.tunnel.BeltTunnelTileEntity;
+import com.simibubi.create.foundation.networking.SimplePacketBase;
+import com.simibubi.create.foundation.networking.TileEntityConfigurationPacket;
+import com.simibubi.create.foundation.networking.TileEntityDataPacket;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.world.ClientWorld;
+import net.minecraft.network.PacketBuffer;
+import net.minecraft.tileentity.TileEntity;
+import net.minecraft.util.Direction;
+import net.minecraft.util.math.BlockPos;
+import net.minecraftforge.fml.network.NetworkEvent;
+import org.apache.commons.lang3.tuple.Pair;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Supplier;
+
+public class TunnelFlapPacket extends TileEntityDataPacket<BeltTunnelTileEntity> {
+
+    private List<Pair<Direction, Boolean>> flaps;
+
+    public TunnelFlapPacket(PacketBuffer buffer) {
+        super(buffer);
+
+        byte size = buffer.readByte();
+
+        this.flaps = new ArrayList<>(size);
+
+        for (int i = 0; i < size; i++) {
+            Direction direction = Direction.byIndex(buffer.readByte());
+            boolean inwards = buffer.readBoolean();
+
+            flaps.add(Pair.of(direction, inwards));
+        }
+    }
+
+    public TunnelFlapPacket(BeltTunnelTileEntity tile, List<Pair<Direction, Boolean>> flaps) {
+        super(tile.getPos());
+
+        this.flaps = new ArrayList<>(flaps);
+    }
+
+    @Override
+    protected void writeData(PacketBuffer buffer) {
+        buffer.writeByte(flaps.size());
+
+        for (Pair<Direction, Boolean> flap : flaps) {
+            buffer.writeByte(flap.getLeft().getIndex());
+            buffer.writeBoolean(flap.getRight());
+        }
+    }
+
+    @Override
+    protected void handlePacket(BeltTunnelTileEntity tile) {
+        for (Pair<Direction, Boolean> flap : flaps) {
+            tile.flap(flap.getLeft(), flap.getRight());
+        }
+    }
+}

src/main/java/com/simibubi/create/foundation/networking/AllPackets.java

@@ -28,6 +28,8 @@ import com.simibubi.create.content.logistics.block.mechanicalArm.ArmPlacementPac
 import com.simibubi.create.content.logistics.item.filter.FilterScreenPacket;
 import com.simibubi.create.content.logistics.packet.ConfigureFlexcratePacket;
 import com.simibubi.create.content.logistics.packet.ConfigureStockswitchPacket;
+import com.simibubi.create.content.logistics.packet.FunnelFlapPacket;
+import com.simibubi.create.content.logistics.packet.TunnelFlapPacket;
 import com.simibubi.create.content.schematics.packet.ConfigureSchematicannonPacket;
 import com.simibubi.create.content.schematics.packet.InstantSchematicPacket;
 import com.simibubi.create.content.schematics.packet.SchematicPlacePacket;
@@ -86,7 +88,9 @@ public enum AllPackets {
 	FLUID_SPLASH(FluidSplashPacket.class, FluidSplashPacket::new, PLAY_TO_CLIENT),
 	CONTRAPTION_FLUID(ContraptionFluidPacket.class, ContraptionFluidPacket::new, PLAY_TO_CLIENT),
 	GANTRY_UPDATE(GantryContraptionUpdatePacket.class, GantryContraptionUpdatePacket::new, PLAY_TO_CLIENT),
-	BLOCK_HIGHLIGHT(HighlightPacket.class, HighlightPacket::new, PLAY_TO_CLIENT)
+	BLOCK_HIGHLIGHT(HighlightPacket.class, HighlightPacket::new, PLAY_TO_CLIENT),
+	TUNNEL_FLAP(TunnelFlapPacket.class, TunnelFlapPacket::new, PLAY_TO_CLIENT),
+	FUNNEL_FLAP(FunnelFlapPacket.class, FunnelFlapPacket::new, PLAY_TO_CLIENT),
 
 	;
 

src/main/java/com/simibubi/create/foundation/networking/TileEntityDataPacket.java

@@ -0,0 +1,56 @@
+package com.simibubi.create.foundation.networking;
+
+import com.simibubi.create.content.logistics.block.belts.tunnel.BeltTunnelTileEntity;
+import com.simibubi.create.foundation.tileEntity.SyncedTileEntity;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.world.ClientWorld;
+import net.minecraft.network.PacketBuffer;
+import net.minecraft.tileentity.TileEntity;
+import net.minecraft.util.math.BlockPos;
+import net.minecraftforge.fml.network.NetworkEvent;
+
+import java.util.function.Supplier;
+
+/**
+ * A server to client version of {@link TileEntityConfigurationPacket}
+ * @param <TE>
+ */
+public abstract class TileEntityDataPacket<TE extends SyncedTileEntity> extends SimplePacketBase {
+
+    protected BlockPos tilePos;
+
+    public TileEntityDataPacket(PacketBuffer buffer) {
+        tilePos = buffer.readBlockPos();
+    }
+
+    public TileEntityDataPacket(BlockPos pos) {
+        this.tilePos = pos;
+    }
+
+    @Override
+    public void write(PacketBuffer buffer) {
+        buffer.writeBlockPos(tilePos);
+        writeData(buffer);
+    }
+
+    @Override
+    public void handle(Supplier<NetworkEvent.Context> context) {
+        NetworkEvent.Context ctx = context.get();
+        ctx.enqueueWork(() -> {
+            ClientWorld world = Minecraft.getInstance().world;
+
+            if (world == null) return;
+
+            TileEntity tile = world.getTileEntity(tilePos);
+
+            if (tile instanceof SyncedTileEntity) {
+                handlePacket((TE) tile);
+            }
+        });
+        ctx.setPacketHandled(true);
+    }
+
+    protected abstract void writeData(PacketBuffer buffer);
+
+    protected abstract void handlePacket(TE tile);
+}

src/main/java/com/simibubi/create/foundation/tileEntity/SyncedTileEntity.java

@@ -5,6 +5,9 @@ import net.minecraft.network.NetworkManager;
 import net.minecraft.network.play.server.SUpdateTileEntityPacket;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.tileentity.TileEntityType;
+import net.minecraft.util.math.SectionPos;
+import net.minecraft.world.chunk.Chunk;
+import net.minecraftforge.fml.network.PacketDistributor;
 
 public abstract class SyncedTileEntity extends TileEntity {
 
@@ -60,4 +63,12 @@ public abstract class SyncedTileEntity extends TileEntity {
 		sendData();
 	}
 
+	public PacketDistributor.PacketTarget packetTarget() {
+		return PacketDistributor.TRACKING_CHUNK.with(this::containedChunk);
+	}
+
+	public Chunk containedChunk() {
+		SectionPos sectionPos = SectionPos.from(pos);
+		return world.getChunk(sectionPos.getSectionX(), sectionPos.getSectionZ());
+	}
 }