Synchronized Flaps

- Belt tunnels can now act as backup-friendly belt mergers
- Funnels can now pick up items touching them when not in belt mode
- Fixed taking items from belts with right-click
- Fixed crash when placing redstone links

src/main/java/com/simibubi/create/AllBlocks.java

@@ -175,6 +175,7 @@ public enum AllBlocks {
 	VERTICAL_FUNNEL(new FunnelBlock.Vertical()),
 	BELT_TUNNEL(new BeltTunnelBlock()),
 	BELT_TUNNEL_FLAP(new RenderUtilityBlock()),
+	BELT_TUNNEL_INDICATOR(new RenderUtilityBlock()),
 	ENTITY_DETECTOR(new BeltObserverBlock()),
 	PULSE_REPEATER(new PulseRepeaterBlock()),
 	FLEXPEATER(new FlexpeaterBlock()),

src/main/java/com/simibubi/create/AllItems.java

@@ -42,9 +42,9 @@ import net.minecraftforge.registries.IForgeRegistry;
 public enum AllItems {
 
 	__MATERIALS__(),
+	ANDESITE_ALLOY_CUBE(ingredient()),
 	COPPER_INGOT(ingredient()),
 	ZINC_CUBE(ingredient()),
-	ANDESITE_ALLOY_CUBE(ingredient()),
 	BRASS_CUBE(ingredient()),
 	COPPER_NUGGET(ingredient()),
 	ZINC_NUGGET(ingredient()),

src/main/java/com/simibubi/create/modules/contraptions/components/fan/AirCurrent.java

@@ -255,7 +255,7 @@ public class AirCurrent {
 				continue;
 			World world = belt.getWorld();
 
-			controller.getInventory().forEachWithin(belt.index + .5f, .5f, (transported) -> {
+			controller.getInventory().forEachWithin(belt.index + .5f, .51f, (transported) -> {
 				InWorldProcessing.spawnParticlesForProcessing(world,
 						controller.getInventory().getVectorForOffset(transported.beltPosition), processingType);
 				if (world.isRemote)

src/main/java/com/simibubi/create/modules/contraptions/relays/belt/BeltBlock.java

@@ -192,7 +192,7 @@ public class BeltBlock extends HorizontalKineticBlock implements IHaveNoBlockIte
 				return false;
 			if (worldIn.isRemote)
 				return true;
-			controllerBelt.getInventory().forEachWithin(belt.index, .75f, (transportedItemStack) -> {
+			controllerBelt.getInventory().forEachWithin(belt.index + .5f, .55f, (transportedItemStack) -> {
 				player.inventory.placeItemBackInInventory(worldIn, transportedItemStack.stack);
 				return Collections.emptyList();
 			});

src/main/java/com/simibubi/create/modules/contraptions/relays/belt/BeltInventory.java

@@ -103,6 +103,7 @@ public class BeltInventory {
 			float limitedMovement = beltMovementPositive ? Math.min(movement, diffToEnd)
 					: Math.max(movement, diffToEnd);
 
+			float nextOffset = current.beltPosition + limitedMovement;
 			if (!onClient) {
 				// Don't move if belt attachments want to continue processing
 				if (segmentBefore != -1 && current.locked) {
@@ -122,10 +123,8 @@ public class BeltInventory {
 
 				// See if any new belt processing catches the item
 				int upcomingSegment = (int) (current.beltPosition + (beltMovementPositive ? .5f : -.5f));
-				for (int segment = upcomingSegment; beltMovementPositive
+				for (int segment = upcomingSegment; beltMovementPositive ? segment + .5f <= nextOffset
-						? segment + .5f <= current.beltPosition + limitedMovement
+						: segment + .5f >= nextOffset; segment += beltMovementPositive ? 1 : -1) {
-						: segment + .5f >= current.beltPosition + limitedMovement; segment += beltMovementPositive ? 1
-								: -1) {
 					BeltTileEntity beltSegment = getBeltSegment(segmentBefore);
 					if (beltSegment == null)
 						break;
@@ -140,11 +139,16 @@ public class BeltInventory {
 				}
 			}
 
-			// Client: Belt tunnel flaps
+			// Belt tunnels
-			if (onClient) {
+			{
 				int seg1 = (int) current.beltPosition;
-				int seg2 = (int) (current.beltPosition + limitedMovement);
+				int seg2 = (int) nextOffset;
+				if (!beltMovementPositive && nextOffset == 0)
+					seg2 = -1;
 				if (seg1 != seg2) {
+					if (stuckAtTunnel(seg2, current.stack, belt.getMovementFacing())) {
+						continue;
+					}
 					flapTunnel(seg1, belt.getMovementFacing(), false);
 					flapTunnel(seg2, belt.getMovementFacing().getOpposite(), true);
 				}
@@ -247,6 +251,44 @@ public class BeltInventory {
 
 	}
 
+	private boolean stuckAtTunnel(int offset, ItemStack stack, Direction movementDirection) {
+		BlockPos pos = getPositionForOffset(offset).up();
+		if (!AllBlocks.BELT_TUNNEL.typeOf(belt.getWorld().getBlockState(pos)))
+			return false;
+		TileEntity te = belt.getWorld().getTileEntity(pos);
+		if (te == null || !(te instanceof BeltTunnelTileEntity))
+			return false;
+
+		Direction flapFacing = movementDirection;
+		if (flapFacing.getAxis() == Axis.X)
+			flapFacing = flapFacing.getOpposite();
+
+		BeltTunnelTileEntity tunnel = (BeltTunnelTileEntity) te;
+		if (!tunnel.flaps.containsKey(flapFacing))
+			return false;
+		if (!tunnel.syncedFlaps.containsKey(flapFacing))
+			return false;
+		ItemStack heldItem = tunnel.syncedFlaps.get(flapFacing);
+		if (heldItem == null) {
+			tunnel.syncedFlaps.put(flapFacing, ItemStack.EMPTY);
+			belt.sendData();
+			return false;
+		}
+		if (heldItem == ItemStack.EMPTY) {
+			tunnel.syncedFlaps.put(flapFacing, stack);
+			return true;
+		}
+
+		List<BeltTunnelTileEntity> group = BeltTunnelBlock.getSynchronizedGroup(belt.getWorld(), pos, flapFacing);
+		for (BeltTunnelTileEntity otherTunnel : group)
+			if (otherTunnel.syncedFlaps.get(flapFacing) == ItemStack.EMPTY)
+				return true;
+		for (BeltTunnelTileEntity otherTunnel : group)
+			otherTunnel.syncedFlaps.put(flapFacing, null);
+
+		return true;
+	}
+
 	private void flapTunnel(int offset, Direction side, boolean inward) {
 		if (belt.getBlockState().get(BeltBlock.SLOPE) != Slope.HORIZONTAL)
 			return;

src/main/java/com/simibubi/create/modules/contraptions/relays/belt/BeltTileEntity.java

@@ -159,6 +159,7 @@ public class BeltTileEntity extends KineticTileEntity {
 
 	@Override
 	public void read(CompoundNBT compound) {
+		super.read(compound);
 		trackerUpdateTag = compound;
 		controller = NBTUtil.readBlockPos(compound.getCompound("Controller"));
 		color = compound.getInt("Color");
@@ -167,7 +168,6 @@ public class BeltTileEntity extends KineticTileEntity {
 
 		if (isController())
 			getInventory().read(compound.getCompound("Inventory"));
-		super.read(compound);
 	}
 
 	public void applyColor(DyeColor colorIn) {

src/main/java/com/simibubi/create/modules/contraptions/relays/belt/BeltTunnelBlock.java

@@ -1,5 +1,9 @@
 package com.simibubi.create.modules.contraptions.relays.belt;
 
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
 import com.simibubi.create.AllBlocks;
 import com.simibubi.create.foundation.block.IWithTileEntity;
 import com.simibubi.create.foundation.utility.Lang;
@@ -119,8 +123,35 @@ public class BeltTunnelBlock extends Block implements IWithTileEntity<BeltTunnel
 	public static void updateTunnel(World world, BlockPos pos) {
 		BlockState tunnel = world.getBlockState(pos);
 		BlockState newTunnel = getTunnelState(world, pos);
-		if (tunnel != newTunnel)
+		if (tunnel != newTunnel) {
 			world.setBlockState(pos, newTunnel, 3);
+			TileEntity te = world.getTileEntity(pos);
+			if (te != null && (te instanceof BeltTunnelTileEntity))
+				((BeltTunnelTileEntity) te).initFlaps();
+		}
+	}
+
+	public static List<BeltTunnelTileEntity> getSynchronizedGroup(World world, BlockPos pos, Direction flapFacing) {
+		List<BeltTunnelTileEntity> group = new ArrayList<>();
+		Direction searchDirection = flapFacing.rotateY();
+
+		for (Direction d : Arrays.asList(searchDirection, searchDirection.getOpposite())) {
+			BlockPos currentPos = pos;
+			while (true) {
+				if (!world.isBlockPresent(currentPos))
+					break;
+				TileEntity te = world.getTileEntity(currentPos);
+				if (te == null || !(te instanceof BeltTunnelTileEntity))
+					break;
+				BeltTunnelTileEntity tunnel = (BeltTunnelTileEntity) te;
+				if (!tunnel.syncedFlaps.containsKey(flapFacing))
+					break;
+				group.add(tunnel);
+				currentPos = currentPos.offset(d);
+			}
+		}
+
+		return group;
 	}
 
 	private static BlockState getTunnelState(IBlockReader reader, BlockPos pos) {
@@ -159,6 +190,12 @@ public class BeltTunnelBlock extends Block implements IWithTileEntity<BeltTunnel
 
 	@Override
 	public ActionResultType onWrenched(BlockState state, ItemUseContext context) {
+
+		// Toggle sync
+		if (toggleSync(context.getWorld(), context.getPos(), context.getFace()))
+			return ActionResultType.SUCCESS;
+
+		// Toggle windows
 		if (!hasWindow(state))
 			return IWrenchable.super.onWrenched(state, context);
 		Shape next = state.get(SHAPE);
@@ -180,6 +217,14 @@ public class BeltTunnelBlock extends Block implements IWithTileEntity<BeltTunnel
 		return ActionResultType.SUCCESS;
 	}
 
+	private boolean toggleSync(World world, BlockPos pos, Direction face) {
+		TileEntity te = world.getTileEntity(pos);
+		if (te == null || !(te instanceof BeltTunnelTileEntity))
+			return false;
+		BeltTunnelTileEntity tunnel = (BeltTunnelTileEntity) te;
+		return tunnel.toggleSyncForFlap(face);
+	}
+
 	@Override
 	public void neighborChanged(BlockState state, World worldIn, BlockPos pos, Block blockIn, BlockPos fromPos,
 			boolean isMoving) {

src/main/java/com/simibubi/create/modules/contraptions/relays/belt/BeltTunnelTileEntity.java

@@ -9,6 +9,7 @@ import com.simibubi.create.foundation.gui.widgets.InterpolatedChasingValue;
 import com.simibubi.create.modules.contraptions.relays.belt.BeltTunnelBlock.Shape;
 
 import net.minecraft.block.BlockState;
+import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.CompoundNBT;
 import net.minecraft.state.properties.BlockStateProperties;
 import net.minecraft.tileentity.ITickableTileEntity;
@@ -24,6 +25,7 @@ import net.minecraftforge.items.IItemHandler;
 public class BeltTunnelTileEntity extends SyncedTileEntity implements ITickableTileEntity {
 
 	public HashMap<Direction, InterpolatedChasingValue> flaps;
+	public HashMap<Direction, ItemStack> syncedFlaps;
 	private LazyOptional<IItemHandler> cap = LazyOptional.empty();
 	private boolean initialize;
 
@@ -33,6 +35,7 @@ public class BeltTunnelTileEntity extends SyncedTileEntity implements ITickableT
 	public BeltTunnelTileEntity() {
 		super(AllTileEntities.BELT_TUNNEL.type);
 		flaps = new HashMap<>();
+		syncedFlaps = new HashMap<>();
 		initialize = true;
 	}
 
@@ -62,6 +65,41 @@ public class BeltTunnelTileEntity extends SyncedTileEntity implements ITickableT
 		cap.invalidate();
 	}
 
+	@Override
+	public CompoundNBT write(CompoundNBT compound) {
+		CompoundNBT dyedFlapsNBT = new CompoundNBT();
+		syncedFlaps.forEach((direction, pair) -> {
+			dyedFlapsNBT.putBoolean(direction.name(), true);
+		});
+		compound.put("syncedFlaps", dyedFlapsNBT);
+		return super.write(compound);
+	}
+
+	@Override
+	public void read(CompoundNBT compound) {
+		if (compound.contains("syncedFlaps")) {
+			syncedFlaps.clear();
+			CompoundNBT dyedFlapsNBT = compound.getCompound("syncedFlaps");
+			for (Direction direction : Direction.values()) {
+				if (dyedFlapsNBT.contains(direction.name()))
+					syncedFlaps.put(direction, ItemStack.EMPTY);
+			}
+		}
+		super.read(compound);
+	}
+
+	public boolean toggleSyncForFlap(Direction face) {
+		if (!flaps.containsKey(face))
+			return false;
+		if (syncedFlaps.containsKey(face)) 
+			syncedFlaps.remove(face);
+		else
+			syncedFlaps.put(face, ItemStack.EMPTY);
+		markDirty();
+		sendData();
+		return true;
+	}
+
 	@Override
 	public CompoundNBT writeToClient(CompoundNBT tag) {
 		CompoundNBT writeToClient = super.writeToClient(tag);
@@ -86,7 +124,6 @@ public class BeltTunnelTileEntity extends SyncedTileEntity implements ITickableT
 	public void initFlaps() {
 		if (!world.isRemote) {
 			sendData();
-			return;
 		}
 
 		initialize = false;
@@ -126,10 +163,10 @@ public class BeltTunnelTileEntity extends SyncedTileEntity implements ITickableT
 
 	@Override
 	public void tick() {
-		if (!world.isRemote)
-			return;
 		if (initialize)
 			initFlaps();
+		if (!world.isRemote)
+			return;
 		flaps.forEach((d, value) -> value.tick());
 	}
 

src/main/java/com/simibubi/create/modules/contraptions/relays/belt/BeltTunnelTileEntityRenderer.java

@@ -2,6 +2,7 @@ package com.simibubi.create.modules.contraptions.relays.belt;
 
 import com.simibubi.create.AllBlocks;
 import com.simibubi.create.CreateClient;
+import com.simibubi.create.foundation.utility.ColorHelper;
 import com.simibubi.create.foundation.utility.SuperByteBuffer;
 
 import net.minecraft.block.BlockState;
@@ -19,7 +20,9 @@ public class BeltTunnelTileEntityRenderer extends TileEntityRendererFast<BeltTun
 	public void renderTileEntityFast(BeltTunnelTileEntity te, double x, double y, double z, float partialTicks,
 			int destroyStage, BufferBuilder buffer) {
 		BlockState flapState = AllBlocks.BELT_TUNNEL_FLAP.get().getDefaultState();
+		BlockState indicatorState = AllBlocks.BELT_TUNNEL_INDICATOR.get().getDefaultState();
 		SuperByteBuffer flapBuffer = CreateClient.bufferCache.renderGenericBlockModel(flapState);
+		SuperByteBuffer indicatorBuffer = CreateClient.bufferCache.renderGenericBlockModel(indicatorState);
 		BlockPos pos = te.getPos();
 		World world = getWorld();
 
@@ -41,9 +44,18 @@ public class BeltTunnelTileEntityRenderer extends TileEntityRendererFast<BeltTun
 					f *= -1;
 
 				float intensity = segment == 3 ? 1.5f : segment + 1;
-				float flapAngle = MathHelper.sin((float) ((1 - Math.abs(f)) * Math.PI * intensity)) * 30 * -f;
+				float abs = Math.abs(f);
+				float flapAngle = MathHelper.sin((float) ((1 - abs) * Math.PI * intensity)) * 30 * -f;
 				flapAngle = (float) (flapAngle / 180 * Math.PI);
 
+				if (te.syncedFlaps.containsKey(direction)) {
+					float lightIntensity = abs * abs * abs;
+					int color = ColorHelper.mixColors(0x808080, 0xFFFFFF, lightIntensity);
+					indicatorBuffer.rotateCentered(Axis.Y, (float) ((horizontalAngle + 90) / 180f * Math.PI))
+							.translate(x, y, z).color(color)
+							.light(world.getCombinedLight(pos, (int) (12 * lightIntensity))).renderInto(buffer);
+				}
+
 				flapBuffer.translate(0, 0, -segment * 3 / 16f);
 				flapBuffer.translate(flapPivotX, flapPivotY, flapPivotZ).rotate(Axis.Z, flapAngle)
 						.translate(-flapPivotX, -flapPivotY, -flapPivotZ);

src/main/java/com/simibubi/create/modules/logistics/block/IInventoryManipulator.java

@@ -1,57 +0,0 @@
-package com.simibubi.create.modules.logistics.block;
-
-import net.minecraft.block.BlockState;
-import net.minecraft.tileentity.TileEntity;
-import net.minecraft.util.math.BlockPos;
-import net.minecraft.world.World;
-import net.minecraftforge.common.util.LazyOptional;
-import net.minecraftforge.items.CapabilityItemHandler;
-import net.minecraftforge.items.IItemHandler;
-
-public interface IInventoryManipulator {
-
-	public default World getWorld() {
-		return ((TileEntity) this).getWorld();
-	}
-	
-	public default BlockPos getPos() {
-		return ((TileEntity) this).getPos();
-	}
-
-	public BlockPos getInventoryPos();
-
-	public LazyOptional<IItemHandler> getInventory();
-
-	public void setInventory(LazyOptional<IItemHandler> inventory);
-
-	default boolean findNewInventory() {
-		BlockPos invPos = getInventoryPos();
-		World world = getWorld();
-
-		if (!world.isBlockPresent(invPos))
-			return false;
-		BlockState invState = world.getBlockState(invPos);
-
-		if (!invState.hasTileEntity())
-			return false;
-		TileEntity invTE = world.getTileEntity(invPos);
-		if (invTE == null)
-			return false;
-		
-		LazyOptional<IItemHandler> inventory = invTE.getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY);
-		setInventory(inventory);
-		if (inventory.isPresent()) {
-			return true;
-		}
-
-		return false;
-	}
-
-	public default void neighborChanged() {
-		boolean hasInventory = getInventory().isPresent();
-		if (!hasInventory) {
-			findNewInventory();
-		}
-	}
-
-}

src/main/java/com/simibubi/create/modules/logistics/block/RedstoneLinkTileEntity.java

@@ -44,13 +44,13 @@ public class RedstoneLinkTileEntity extends SmartTileEntity {
 
 	@Override
 	public void addBehavioursDeferred(List<TileEntityBehaviour> behaviours) {
-		if (slots == null)
-			createSlotPositioning();
 		createLink();
 		behaviours.add(link);
 	}
 
 	protected void createLink() {
+		if (slots == null)
+			createSlotPositioning();
 		if (transmitter)
 			link = LinkBehaviour.transmitter(this, this::getSignal);
 		else

src/main/java/com/simibubi/create/modules/logistics/block/belts/ExtractorForBeltsBlock.java

@@ -0,0 +1,75 @@
+package com.simibubi.create.modules.logistics.block.belts;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import com.simibubi.create.foundation.behaviour.base.TileEntityBehaviour;
+import com.simibubi.create.foundation.behaviour.filtering.FilteringBehaviour;
+import com.simibubi.create.foundation.behaviour.inventory.ExtractingBehaviour;
+import com.simibubi.create.modules.contraptions.relays.belt.BeltTileEntity;
+import com.simibubi.create.modules.contraptions.relays.belt.TransportedItemStack;
+import com.simibubi.create.modules.contraptions.relays.belt.AllBeltAttachments.BeltAttachmentState;
+import com.simibubi.create.modules.contraptions.relays.belt.AllBeltAttachments.IBeltAttachment;
+
+import net.minecraft.block.BlockState;
+import net.minecraft.item.ItemStack;
+import net.minecraft.util.Direction;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.IWorld;
+import net.minecraft.world.World;
+
+public abstract class ExtractorForBeltsBlock extends AttachedLogisticalBlock implements IBeltAttachment {
+
+	@Override
+	public void onBlockAdded(BlockState state, World worldIn, BlockPos pos, BlockState oldState, boolean isMoving) {
+		onAttachmentPlaced(worldIn, pos, state);
+	}
+
+	@Override
+	public void onReplaced(BlockState state, World worldIn, BlockPos pos, BlockState newState, boolean isMoving) {
+		onAttachmentRemoved(worldIn, pos, state);
+		if (state.hasTileEntity() && state.getBlock() != newState.getBlock()) {
+			worldIn.removeTileEntity(pos);
+		}
+	}
+
+	@Override
+	public BlockPos getBeltPositionForAttachment(IWorld world, BlockPos pos, BlockState state) {
+		return pos.offset(getBlockFacing(state));
+	}
+
+	@Override
+	public List<BlockPos> getPotentialAttachmentPositions(IWorld world, BlockPos pos, BlockState beltState) {
+		return Arrays.asList(Direction.values()).stream().filter(d -> d != Direction.UP).map(pos::offset)
+				.collect(Collectors.toList());
+	}
+
+	public boolean startProcessingItem(BeltTileEntity te, TransportedItemStack transported, BeltAttachmentState state) {
+		BlockPos pos = state.attachmentPos;
+		World world = te.getWorld();
+		ItemStack stack = transported.stack;
+
+		FilteringBehaviour filtering = TileEntityBehaviour.get(world, pos, FilteringBehaviour.TYPE);
+		ExtractingBehaviour extracting = TileEntityBehaviour.get(world, pos, ExtractingBehaviour.TYPE);
+
+		if (extracting == null)
+			return false;
+		if (filtering != null && (!filtering.test(stack) || stack.getCount() < filtering.getFilter().getCount()))
+			return false;
+
+		return true;
+	}
+
+	public boolean processItem(BeltTileEntity te, TransportedItemStack transported, BeltAttachmentState state) {
+		BlockPos pos = state.attachmentPos;
+		World world = te.getWorld();
+		ExtractingBehaviour extracting = TileEntityBehaviour.get(world, pos, ExtractingBehaviour.TYPE);
+		
+		if (extracting == null)
+			return false;
+		extracting.extract();
+		return false;
+	}
+
+}

src/main/java/com/simibubi/create/modules/logistics/block/belts/FunnelBlock.java

@@ -10,10 +10,11 @@ import com.simibubi.create.modules.contraptions.relays.belt.AllBeltAttachments.B
 import com.simibubi.create.modules.contraptions.relays.belt.AllBeltAttachments.IBeltAttachment;
 import com.simibubi.create.modules.contraptions.relays.belt.BeltTileEntity;
 import com.simibubi.create.modules.contraptions.relays.belt.TransportedItemStack;
-import com.simibubi.create.modules.logistics.block.IInventoryManipulator;
 
 import net.minecraft.block.Block;
 import net.minecraft.block.BlockState;
+import net.minecraft.entity.Entity;
+import net.minecraft.entity.item.ItemEntity;
 import net.minecraft.item.BlockItemUseContext;
 import net.minecraft.item.ItemStack;
 import net.minecraft.state.BooleanProperty;
@@ -26,7 +27,6 @@ import net.minecraft.util.math.shapes.ISelectionContext;
 import net.minecraft.util.math.shapes.VoxelShape;
 import net.minecraft.world.IBlockReader;
 import net.minecraft.world.IWorld;
-import net.minecraft.world.IWorldReader;
 import net.minecraft.world.World;
 
 public class FunnelBlock extends AttachedLogisticalBlock
@@ -56,6 +56,22 @@ public class FunnelBlock extends AttachedLogisticalBlock
 		return false;
 	}
 	
+	@Override
+	public void onEntityCollision(BlockState state, World worldIn, BlockPos pos, Entity entityIn) {
+		if (worldIn.isRemote)
+			return;
+		if (!(entityIn instanceof ItemEntity))
+			return;
+		ItemEntity itemEntity = (ItemEntity) entityIn;
+		withTileEntityDo(worldIn, pos, te -> {
+			ItemStack remainder = te.tryToInsert(itemEntity.getItem());
+			if (remainder.isEmpty())
+				itemEntity.remove();
+			if (remainder.getCount() < itemEntity.getItem().getCount())
+				itemEntity.setItem(remainder);
+		});
+	}
+
 	@Override
 	protected BlockState getVerticalDefaultState() {
 		return AllBlocks.VERTICAL_FUNNEL.getDefault();
@@ -95,21 +111,6 @@ public class FunnelBlock extends AttachedLogisticalBlock
 	@Override
 	public void onBlockAdded(BlockState state, World worldIn, BlockPos pos, BlockState oldState, boolean isMoving) {
 		onAttachmentPlaced(worldIn, pos, state);
-		updateObservedInventory(state, worldIn, pos);
-	}
-
-	@Override
-	public void onNeighborChange(BlockState state, IWorldReader world, BlockPos pos, BlockPos neighbor) {
-		if (!neighbor.equals(pos.offset(state.get(HORIZONTAL_FACING))))
-			return;
-		updateObservedInventory(state, world, pos);
-	}
-
-	private void updateObservedInventory(BlockState state, IWorldReader world, BlockPos pos) {
-		IInventoryManipulator te = (IInventoryManipulator) world.getTileEntity(pos);
-		if (te == null)
-			return;
-		te.neighborChanged();
 	}
 
 	@Override

src/main/java/com/simibubi/create/modules/logistics/block/belts/FunnelTileEntity.java

@@ -7,10 +7,10 @@ import com.simibubi.create.foundation.behaviour.base.SmartTileEntity;
 import com.simibubi.create.foundation.behaviour.base.TileEntityBehaviour;
 import com.simibubi.create.foundation.behaviour.filtering.FilteringBehaviour;
 import com.simibubi.create.foundation.behaviour.filtering.FilteringBehaviour.SlotPositioning;
+import com.simibubi.create.foundation.behaviour.inventory.InsertingBehaviour;
+import com.simibubi.create.foundation.behaviour.inventory.InventoryManagementBehaviour.Attachments;
 import com.simibubi.create.foundation.utility.AngleHelper;
 import com.simibubi.create.foundation.utility.VecHelper;
-import com.simibubi.create.modules.contraptions.relays.belt.ItemHandlerBeltSegment;
-import com.simibubi.create.modules.logistics.block.IInventoryManipulator;
 import com.simibubi.create.modules.logistics.block.extractor.ExtractorBlock;
 
 import net.minecraft.item.ItemStack;
@@ -18,30 +18,22 @@ import net.minecraft.nbt.CompoundNBT;
 import net.minecraft.particles.ItemParticleData;
 import net.minecraft.particles.ParticleTypes;
 import net.minecraft.state.properties.BlockStateProperties;
-import net.minecraft.tileentity.ITickableTileEntity;
 import net.minecraft.util.Direction;
 import net.minecraft.util.Direction.Axis;
 import net.minecraft.util.SoundCategory;
 import net.minecraft.util.SoundEvents;
-import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.Vec3d;
 import net.minecraft.util.math.Vec3i;
-import net.minecraftforge.common.util.LazyOptional;
-import net.minecraftforge.items.IItemHandler;
-import net.minecraftforge.items.ItemHandlerHelper;
 
-public class FunnelTileEntity extends SmartTileEntity implements ITickableTileEntity, IInventoryManipulator {
+public class FunnelTileEntity extends SmartTileEntity {
 
 	private static FilteringBehaviour.SlotPositioning slots;
 	private FilteringBehaviour filtering;
-
+	private InsertingBehaviour inserting;
-	private LazyOptional<IItemHandler> inventory;
-	protected boolean waitingForInventorySpace;
 	private ItemStack justEaten;
 
 	public FunnelTileEntity() {
 		super(AllTileEntities.BELT_FUNNEL.type);
-		inventory = LazyOptional.empty();
 	}
 
 	@Override
@@ -50,22 +42,12 @@ public class FunnelTileEntity extends SmartTileEntity implements ITickableTileEn
 			createSlotPositioning();
 		filtering = new FilteringBehaviour(this).withCallback(this::filterChanged).withSlotPositioning(slots);
 		behaviours.add(filtering);
+		inserting = new InsertingBehaviour(this,
+				Attachments.toward(() -> AttachedLogisticalBlock.getBlockFacing(getBlockState())));
+		behaviours.add(inserting);
 	}
 
 	public void filterChanged(ItemStack stack) {
-		neighborChanged();
-	}
-
-	@Override
-	public void read(CompoundNBT compound) {
-		waitingForInventorySpace = compound.getBoolean("Waiting");
-		super.read(compound);
-	}
-
-	@Override
-	public CompoundNBT write(CompoundNBT compound) {
-		compound.putBoolean("Waiting", waitingForInventorySpace);
-		return super.write(compound);
 	}
 
 	@Override
@@ -80,67 +62,29 @@ public class FunnelTileEntity extends SmartTileEntity implements ITickableTileEn
 	@Override
 	public void readClientUpdate(CompoundNBT tag) {
 		super.readClientUpdate(tag);
-		if (!waitingForInventorySpace)
-			neighborChanged();
 		if (tag.contains("Nom"))
 			justEaten = ItemStack.read(tag.getCompound("Nom"));
 	}
 
-	@Override
-	public BlockPos getInventoryPos() {
-		return pos.offset(getBlockState().get(BlockStateProperties.HORIZONTAL_FACING));
-	}
-
-	@Override
-	public LazyOptional<IItemHandler> getInventory() {
-		return inventory;
-	}
-
 	@Override
 	public void tick() {
+		super.tick();
 		if (world.isRemote && justEaten != null) {
 			spawnParticles(justEaten);
 			justEaten = null;
 		}
 	}
 
-	@Override
-	public void initialize() {
-		neighborChanged();
-		super.initialize();
-	}
-
-	@Override
-	public void setInventory(LazyOptional<IItemHandler> inventory) {
-		this.inventory = inventory;
-	}
-
-	@Override
-	public void neighborChanged() {
-		IInventoryManipulator.super.neighborChanged();
-		waitingForInventorySpace = false;
-		if (!world.isRemote)
-			sendData();
-	}
-
 	public ItemStack tryToInsert(ItemStack stack) {
-		if (!inventory.isPresent())
-			return stack;
-		if (waitingForInventorySpace && !(inventory.orElse(null) instanceof ItemHandlerBeltSegment))
-			return stack;
 		if (!filtering.test(stack))
 			return stack;
 
-		IItemHandler inv = inventory.orElse(null);
+		ItemStack remainder = inserting.insert(stack.copy(), false);
-		ItemStack inserted = stack.copy();
-		ItemStack remainder = ItemHandlerHelper.insertItemStacked(inv, inserted, false);
-		waitingForInventorySpace = true;
 
 		if (remainder.isEmpty()) {
 			if (!world.isRemote)
 				world.playSound(null, pos, SoundEvents.ENTITY_GENERIC_EAT, SoundCategory.BLOCKS, .125f, 1f);
 			justEaten = stack.copy();
-			waitingForInventorySpace = false;
 		}
 
 		sendData();

src/main/resources/assets/create/blockstates/belt_tunnel_indicator.json

@@ -0,0 +1,5 @@
+{
+    "variants": {
+		"": { "model": "create:block/belt_tunnel/indicator" }
+	}
+}

src/main/resources/assets/create/models/block/belt_tunnel/indicator.json

@@ -0,0 +1,22 @@
+{
+	"credit": "Made with Blockbench",
+	"parent": "block/block",
+	"textures": {
+		"0": "create:block/belt_tunnel",
+		"particle": "create:block/belt_tunnel"
+	},
+	"elements": [
+		{
+			"from": [6, 10, 16],
+			"to": [10, 14, 17],
+			"faces": {
+				"north": {"uv": [4.75, 0, 5.75, 1], "texture": "#0"},
+				"east": {"uv": [5.5, 0, 5.75, 1], "texture": "#0"},
+				"south": {"uv": [4.75, 0, 5.75, 1], "texture": "#0"},
+				"west": {"uv": [4.75, 0, 5, 1], "texture": "#0"},
+				"up": {"uv": [4.75, 0, 5, 1], "rotation": 270, "texture": "#0"},
+				"down": {"uv": [4.75, 0, 5, 1], "rotation": 90, "texture": "#0"}
+			}
+		}
+	]
+}