Chute and Air. This took way too long.

src/main/java/com/simibubi/create/content/contraptions/base/KineticTileEntity.java

@@ -21,6 +21,7 @@ import com.simibubi.create.foundation.tileEntity.SmartTileEntity;
 import com.simibubi.create.foundation.tileEntity.TileEntityBehaviour;
 import com.simibubi.create.foundation.utility.Lang;
 
+import net.minecraft.block.Block;
 import net.minecraft.block.BlockState;
 import net.minecraft.client.resources.I18n;
 import net.minecraft.nbt.CompoundNBT;
@@ -145,11 +146,15 @@ public abstract class KineticTileEntity extends SmartTileEntity
 	}
 
 	public float calculateAddedStressCapacity() {
-		float capacity = (float) AllConfigs.SERVER.kinetics.stressValues.getCapacityOf(getBlockState().getBlock());
+		float capacity = (float) AllConfigs.SERVER.kinetics.stressValues.getCapacityOf(getStressConfigKey());
 		this.lastCapacityProvided = capacity;
 		return capacity;
 	}
 
+	protected Block getStressConfigKey() {
+		return getBlockState().getBlock();
+	}
+
 	public float calculateStressApplied() {
 		float impact = (float) AllConfigs.SERVER.kinetics.stressValues.getImpactOf(getBlockState().getBlock());
 		this.lastStressApplied = impact;

src/main/java/com/simibubi/create/content/contraptions/components/crank/AllValveHandles.java

@@ -1,7 +1,6 @@
 package com.simibubi.create.content.contraptions.components.crank;
 
 import com.simibubi.create.AllTags;
-import com.simibubi.create.foundation.config.StressConfigDefaults;
 import com.simibubi.create.foundation.data.CreateRegistrate;
 import com.simibubi.create.foundation.data.SharedProperties;
 import com.tterrag.registrate.util.entry.BlockEntry;
@@ -27,7 +26,6 @@ public class AllValveHandles {
 				.blockstate((c, p) -> p.directionalBlock(c.get(), p.models()
 					.withExistingParent(type + "_valve_handle", p.modLoc("block/valve_handle"))
 					.texture("3", p.modLoc("block/valve_handle/valve_handle_" + type))))
-				.transform(StressConfigDefaults.setCapacity(32.0))
 				.tag(AllTags.AllBlockTags.BRITTLE.tag)
 				.simpleItem()
 				.register();

src/main/java/com/simibubi/create/content/contraptions/components/crank/HandCrankTileEntity.java

@@ -1,5 +1,6 @@
 package com.simibubi.create.content.contraptions.components.crank;
 
+import com.simibubi.create.AllBlocks;
 import com.simibubi.create.content.contraptions.base.GeneratingKineticTileEntity;
 
 import net.minecraft.block.Block;
@@ -67,4 +68,8 @@ public class HandCrankTileEntity extends GeneratingKineticTileEntity {
 		}
 	}
 
+	@Override
+	protected Block getStressConfigKey() {
+		return AllBlocks.HAND_CRANK.get();
+	}
 }

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

@@ -23,7 +23,6 @@ import net.minecraft.entity.EntityType;
 import net.minecraft.entity.item.ItemEntity;
 import net.minecraft.entity.monster.EndermanEntity;
 import net.minecraft.entity.player.ServerPlayerEntity;
-import net.minecraft.state.properties.BlockStateProperties;
 import net.minecraft.util.DamageSource;
 import net.minecraft.util.Direction;
 import net.minecraft.util.SoundCategory;
@@ -41,12 +40,12 @@ import net.minecraft.world.World;
 
 public class AirCurrent {
 
-	private static DamageSource damageSourceFire = new DamageSource("create.fan_fire").setDifficultyScaled()
+	private static final DamageSource damageSourceFire = new DamageSource("create.fan_fire").setDifficultyScaled()
 		.setFireDamage();
-	private static DamageSource damageSourceLava = new DamageSource("create.fan_lava").setDifficultyScaled()
+	private static final DamageSource damageSourceLava = new DamageSource("create.fan_lava").setDifficultyScaled()
 		.setFireDamage();
 
-	public final EncasedFanTileEntity source;
+	public final IAirCurrentSource source;
 	public AxisAlignedBB bounds = new AxisAlignedBB(0, 0, 0, 0, 0, 0);
 	public List<AirCurrentSegment> segments = new ArrayList<>();
 	public Direction direction;
@@ -57,14 +56,16 @@ public class AirCurrent {
 		new ArrayList<>();
 	protected List<Entity> caughtEntities = new ArrayList<>();
 
-	public AirCurrent(EncasedFanTileEntity source) {
+	public AirCurrent(IAirCurrentSource source) {
 		this.source = source;
 	}
 
 	public void tick() {
+		if (direction == null)
+			rebuild();
 		World world = source.getWorld();
 		Direction facing = direction;
-		if (world.isRemote) {
+		if (world != null && world.isRemote) {
 			float offset = pushing ? 0.5f : maxDistance + .5f;
 			Vec3d pos = VecHelper.getCenterOf(source.getPos())
 				.add(new Vec3d(facing.getDirectionVec()).scale(offset));
@@ -160,17 +161,16 @@ public class AirCurrent {
 			return;
 		}
 		
-		direction = source.getBlockState()
+		direction = source.getAirflowOriginSide();
-			.get(BlockStateProperties.FACING);
 		pushing = source.getAirFlowDirection() == direction;
 		maxDistance = source.getMaxDistance();
 
 		World world = source.getWorld();
 		BlockPos start = source.getPos();
 		float max = this.maxDistance;
-		Direction facing = direction;
+		Vec3d directionVec = new Vec3d(direction.getDirectionVec());
-		Vec3d directionVec = new Vec3d(facing.getDirectionVec());
+		// if (source instanceof EncasedFanTileEntity) // debug
-		maxDistance = getFlowLimit(world, start, max, facing);
+		maxDistance = getFlowLimit(world, start, max, direction);
 
 		// Determine segments with transported fluids/gases
 		AirCurrentSegment currentSegment = new AirCurrentSegment();

src/main/java/com/simibubi/create/content/contraptions/components/fan/EncasedFanTileEntity.java

@@ -5,17 +5,17 @@ import com.simibubi.create.content.contraptions.base.GeneratingKineticTileEntity
 import com.simibubi.create.content.contraptions.processing.burner.BlazeBurnerBlock;
 import com.simibubi.create.content.logistics.block.chute.ChuteTileEntity;
 import com.simibubi.create.foundation.config.AllConfigs;
-import com.simibubi.create.foundation.config.CKinetics;
 
+import mcp.MethodsReturnNonnullByDefault;
 import net.minecraft.block.BlockState;
 import net.minecraft.nbt.CompoundNBT;
 import net.minecraft.state.properties.BlockStateProperties;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.tileentity.TileEntityType;
 import net.minecraft.util.Direction;
-import net.minecraft.util.math.MathHelper;
 
-public class EncasedFanTileEntity extends GeneratingKineticTileEntity {
+@MethodsReturnNonnullByDefault
+public class EncasedFanTileEntity extends GeneratingKineticTileEntity implements IAirCurrentSource {
 
 	public AirCurrent airCurrent;
 	protected int airCurrentUpdateCooldown;
@@ -88,15 +88,18 @@ public class EncasedFanTileEntity extends GeneratingKineticTileEntity {
 		return true;
 	}
 
-	public float getMaxDistance() {
+	@Override
-		float speed = Math.abs(this.getSpeed());
+	public AirCurrent getAirCurrent() {
-		CKinetics config = AllConfigs.SERVER.kinetics;
+		return airCurrent;
-		float distanceFactor = Math.min(speed / config.fanRotationArgmax.get(), 1);
-		float pushDistance = MathHelper.lerp(distanceFactor, 3, config.fanPushDistance.get());
-		float pullDistance = MathHelper.lerp(distanceFactor, 3f, config.fanPullDistance.get());
-		return this.getSpeed() > 0 ? pushDistance : pullDistance;
 	}
 
+	@Override
+	public Direction getAirflowOriginSide() {
+		return this.getBlockState()
+			.get(EncasedFanBlock.FACING);
+	}
+
+	@Override
 	public Direction getAirFlowDirection() {
 		float speed = getSpeed();
 		if (speed == 0)

src/main/java/com/simibubi/create/content/contraptions/components/fan/IAirCurrentSource.java

@@ -0,0 +1,40 @@
+package com.simibubi.create.content.contraptions.components.fan;
+
+import com.simibubi.create.foundation.config.AllConfigs;
+import com.simibubi.create.foundation.config.CKinetics;
+import mcp.MethodsReturnNonnullByDefault;
+import net.minecraft.util.Direction;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.MathHelper;
+import net.minecraft.world.World;
+
+import javax.annotation.Nullable;
+
+@MethodsReturnNonnullByDefault
+public interface IAirCurrentSource {
+	@Nullable
+	AirCurrent getAirCurrent();
+
+	@Nullable
+	World getWorld();
+
+	BlockPos getPos();
+
+	float getSpeed();
+
+	Direction getAirflowOriginSide();
+
+	@Nullable
+	Direction getAirFlowDirection();
+
+	default float getMaxDistance() {
+		float speed = Math.abs(this.getSpeed());
+		CKinetics config = AllConfigs.SERVER.kinetics;
+		float distanceFactor = Math.min(speed / config.fanRotationArgmax.get(), 1);
+		float pushDistance = MathHelper.lerp(distanceFactor, 3, config.fanPushDistance.get());
+		float pullDistance = MathHelper.lerp(distanceFactor, 3f, config.fanPullDistance.get());
+		return this.getSpeed() > 0 ? pushDistance : pullDistance;
+	}
+
+	boolean isRemoved();
+}

src/main/java/com/simibubi/create/content/contraptions/components/fan/NozzleTileEntity.java

@@ -123,19 +123,18 @@ public class NozzleTileEntity extends SmartTileEntity {
 
 	private float calcRange() {
 		TileEntity te = world.getTileEntity(fanPos);
-		if (!(te instanceof EncasedFanTileEntity))
+		if (!(te instanceof IAirCurrentSource))
 			return 0;
 
-		EncasedFanTileEntity fan = (EncasedFanTileEntity) te;
+		IAirCurrentSource source = (IAirCurrentSource) te;
-		if (fan.isGenerator)
+		if (source instanceof EncasedFanTileEntity && ((EncasedFanTileEntity) source).isGenerator)
 			return 0;
-		if (fan.airCurrent == null)
+		if (source.getAirCurrent() == null)
 			return 0;
-		if (fan.getSpeed() == 0)
+		if (source.getSpeed() == 0)
 			return 0;
-		pushing = fan.getAirFlowDirection() == fan.getBlockState()
+		pushing = source.getAirFlowDirection() == source.getAirflowOriginSide();
-			.get(EncasedFanBlock.FACING);
+		return source.getMaxDistance();
-		return fan.getMaxDistance();
 	}
 
 	@Override

src/main/java/com/simibubi/create/content/contraptions/particle/AirFlowParticle.java

@@ -1,7 +1,7 @@
 package com.simibubi.create.content.contraptions.particle;
 
 import com.simibubi.create.Create;
-import com.simibubi.create.content.contraptions.components.fan.EncasedFanTileEntity;
+import com.simibubi.create.content.contraptions.components.fan.IAirCurrentSource;
 import com.simibubi.create.content.logistics.InWorldProcessing;
 import com.simibubi.create.foundation.utility.ColorHelper;
 import com.simibubi.create.foundation.utility.VecHelper;
@@ -21,11 +21,13 @@ import net.minecraft.util.math.MathHelper;
 import net.minecraft.util.math.Vec3d;
 import net.minecraft.world.World;
 
+import javax.annotation.Nonnull;
+
 public class AirFlowParticle extends SimpleAnimatedParticle {
 
-	private EncasedFanTileEntity source;
+	private final IAirCurrentSource source;
 
-	protected AirFlowParticle(World world, EncasedFanTileEntity source, double x, double y, double z,
+	protected AirFlowParticle(World world, IAirCurrentSource source, double x, double y, double z,
 			IAnimatedSprite sprite) {
 		super(world, x, y, z, sprite, world.rand.nextFloat() * .5f);
 		this.source = source;
@@ -41,6 +43,7 @@ public class AirFlowParticle extends SimpleAnimatedParticle {
 		setAlphaF(.25f);
 	}
 
+	@Nonnull
 	public IParticleRenderType getRenderType() {
 		return IParticleRenderType.PARTICLE_SHEET_TRANSLUCENT;
 	}
@@ -57,24 +60,24 @@ public class AirFlowParticle extends SimpleAnimatedParticle {
 		if (this.age++ >= this.maxAge) {
 			this.setExpired();
 		} else {
-			if (source.airCurrent == null || !source.airCurrent.bounds.grow(.25f).contains(posX, posY, posZ)) {
+			if (source.getAirCurrent() == null || !source.getAirCurrent().bounds.grow(.25f).contains(posX, posY, posZ)) {
 				dissipate();
 				return;
 			}
 
-			Vec3d directionVec = new Vec3d(source.airCurrent.direction.getDirectionVec());
+			Vec3d directionVec = new Vec3d(source.getAirCurrent().direction.getDirectionVec());
 			Vec3d motion = directionVec.scale(1 / 8f);
-			if (!source.airCurrent.pushing)
+			if (!source.getAirCurrent().pushing)
 				motion = motion.scale(-1);
 
 			double distance = new Vec3d(posX, posY, posZ).subtract(VecHelper.getCenterOf(source.getPos()))
 					.mul(directionVec).length() - .5f;
-			if (distance > source.airCurrent.maxDistance + 1 || distance < -.25f) {
+			if (distance > source.getAirCurrent().maxDistance + 1 || distance < -.25f) {
 				dissipate();
 				return;
 			}
-			motion = motion.scale(source.airCurrent.maxDistance - (distance - 1f)).scale(.5f);
+			motion = motion.scale(source.getAirCurrent().maxDistance - (distance - 1f)).scale(.5f);
-			selectSprite((int) MathHelper.clamp((distance / source.airCurrent.maxDistance) * 8 + world.rand.nextInt(4),
+			selectSprite((int) MathHelper.clamp((distance / source.getAirCurrent().maxDistance) * 8 + world.rand.nextInt(4),
 					0, 7));
 
 			morphType(distance);
@@ -84,8 +87,8 @@ public class AirFlowParticle extends SimpleAnimatedParticle {
 			motionZ = motion.z;
 
 			if (this.onGround) {
-				this.motionX *= (double) 0.7F;
+				this.motionX *= 0.7;
-				this.motionZ *= (double) 0.7F;
+				this.motionZ *= 0.7;
 			}
 			this.move(this.motionX, this.motionY, this.motionZ);
 
@@ -94,7 +97,9 @@ public class AirFlowParticle extends SimpleAnimatedParticle {
 	}
 
 	public void morphType(double distance) {
-		InWorldProcessing.Type type = source.airCurrent.getSegmentAt((float) distance);
+		if(source.getAirCurrent() == null)
+			return;
+		InWorldProcessing.Type type = source.getAirCurrent().getSegmentAt((float) distance);
 
 		if (type == InWorldProcessing.Type.SPLASHING) {
 			setColor(ColorHelper.mixColors(0x4499FF, 0x2277FF, world.rand.nextFloat()));
@@ -162,9 +167,9 @@ public class AirFlowParticle extends SimpleAnimatedParticle {
 		public Particle makeParticle(AirFlowParticleData data, World worldIn, double x, double y, double z,
 				double xSpeed, double ySpeed, double zSpeed) {
 			TileEntity te = worldIn.getTileEntity(new BlockPos(data.posX, data.posY, data.posZ));
-			if (!(te instanceof EncasedFanTileEntity))
+			if (!(te instanceof IAirCurrentSource))
 				te = null;
-			return new AirFlowParticle(worldIn, (EncasedFanTileEntity) te, x, y, z, this.spriteSet);
+			return new AirFlowParticle(worldIn, (IAirCurrentSource) te, x, y, z, this.spriteSet);
 		}
 	}
 

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

@@ -411,7 +411,7 @@ public class BeltInventory {
 			if (Math.abs(position - transforted.beltPosition) >= maxDistanceToPosition)
 				continue;
 			TransportedResult result = processFunction.apply(transforted);
-			if (result.didntChangeFrom(stackBefore))
+			if (result == null|| result.didntChangeFrom(stackBefore))
 				continue;
 
 			dirty = true;

src/main/java/com/simibubi/create/content/logistics/InWorldProcessing.java

@@ -43,6 +43,8 @@ import net.minecraftforge.items.ItemHandlerHelper;
 import net.minecraftforge.items.ItemStackHandler;
 import net.minecraftforge.items.wrapper.RecipeWrapper;
 
+import javax.annotation.Nullable;
+
 public class InWorldProcessing {
 
 	public static class SplashingInv extends RecipeWrapper {
@@ -295,8 +297,8 @@ public class InWorldProcessing {
 		return stacks;
 	}
 
-	public static void spawnParticlesForProcessing(World world, Vec3d vec, Type type) {
+	public static void spawnParticlesForProcessing(@Nullable World world, Vec3d vec, Type type) {
-		if (!world.isRemote)
+		if (world == null || !world.isRemote)
 			return;
 		if (world.rand.nextInt(8) != 0)
 			return;

src/main/java/com/simibubi/create/content/logistics/block/chute/ChuteTileEntity.java

@@ -1,16 +1,11 @@
 package com.simibubi.create.content.logistics.block.chute;
 
-import java.util.LinkedList;
-import java.util.List;
-
-import javax.annotation.Nullable;
-
-import com.google.common.base.Predicates;
 import com.simibubi.create.AllBlocks;
 import com.simibubi.create.Create;
 import com.simibubi.create.content.contraptions.components.fan.AirCurrent;
 import com.simibubi.create.content.contraptions.components.fan.EncasedFanBlock;
 import com.simibubi.create.content.contraptions.components.fan.EncasedFanTileEntity;
+import com.simibubi.create.content.contraptions.components.fan.IAirCurrentSource;
 import com.simibubi.create.content.contraptions.goggles.IHaveGoggleInformation;
 import com.simibubi.create.content.contraptions.particle.AirParticleData;
 import com.simibubi.create.content.logistics.block.chute.ChuteBlock.Shape;
@@ -28,7 +23,7 @@ import com.simibubi.create.foundation.tileEntity.behaviour.belt.TransportedItemS
 import com.simibubi.create.foundation.utility.BlockHelper;
 import com.simibubi.create.foundation.utility.Iterate;
 import com.simibubi.create.foundation.utility.VecHelper;
-
+import mcp.MethodsReturnNonnullByDefault;
 import net.minecraft.block.Block;
 import net.minecraft.block.BlockState;
 import net.minecraft.entity.item.ItemEntity;
@@ -51,7 +46,16 @@ import net.minecraftforge.items.CapabilityItemHandler;
 import net.minecraftforge.items.IItemHandler;
 import net.minecraftforge.items.ItemHandlerHelper;
 
-public class ChuteTileEntity extends SmartTileEntity implements IHaveGoggleInformation {
+import javax.annotation.Nullable;
+import javax.annotation.ParametersAreNonnullByDefault;
+import java.util.LinkedList;
+import java.util.List;
+
+@ParametersAreNonnullByDefault
+@MethodsReturnNonnullByDefault
+public class ChuteTileEntity extends SmartTileEntity implements IHaveGoggleInformation, IAirCurrentSource {
+
+	public AirCurrent airCurrent;
 
 	float pull;
 	float push;
@@ -82,9 +86,12 @@ public class ChuteTileEntity extends SmartTileEntity implements IHaveGoggleInfor
 		capAbove = LazyOptional.empty();
 		capBelow = LazyOptional.empty();
 		bottomPullDistance = 0;
+		airCurrent = new AirCurrent(this);
 		updateAirFlow = true;
 	}
 
+
+
 	@Override
 	public void addBehaviours(List<TileEntityBehaviour> behaviours) {
 		behaviours.add(new DirectBeltInputBehaviour(this).onlyInsertWhen((d) -> canDirectlyInsertCached()));
@@ -126,10 +133,9 @@ public class ChuteTileEntity extends SmartTileEntity implements IHaveGoggleInfor
 		canPickUpItems = canDirectlyInsert();
 
 		float itemMotion = getItemMotion();
-		if (itemMotion != 0 && world.isRemote)
+		if (itemMotion != 0 && world != null && world.isRemote)
 			spawnParticles(itemMotion);
-		if (itemMotion > 0)
+		tickAirStreams(itemMotion);
-			tickAirStreamFromBelow(itemMotion);
 
 		if (item.isEmpty()) {
 			if (itemMotion < 0)
@@ -166,30 +172,64 @@ public class ChuteTileEntity extends SmartTileEntity implements IHaveGoggleInfor
 		itemPosition.set(nextOffset);
 	}
 
-	private void tickAirStreamFromBelow(float itemSpeed) {
+	private void updateAirFlow(float itemSpeed) {
-		if (world.isRemote)
+		updateAirFlow = false;
-			return;
+		airCurrent.rebuild();
+		if (itemSpeed > 0 && world != null && !world.isRemote) {
+			float speed = pull - push;
+			beltBelow = null;
 
-		if (airCurrentUpdateCooldown-- <= 0) {
+			float maxPullDistance;
-			airCurrentUpdateCooldown = AllConfigs.SERVER.kinetics.fanBlockCheckRate.get();
+			if (speed >= 128)
-			updateAirFlow = true;
+				maxPullDistance = 3;
-		}
+			else if (speed >= 64)
+				maxPullDistance = 2;
+			else if (speed >= 32)
+				maxPullDistance = 1;
+			else
+				maxPullDistance = MathHelper.lerp(speed / 32, 0, 1);
 
-		if (bottomPullDistance > 0 && getItem().isEmpty() && entitySearchCooldown-- <= 0) {
+			if (AllBlocks.CHUTE.has(world.getBlockState(pos.down())))
-			entitySearchCooldown = 5;
+				maxPullDistance = 0;
-			Vec3d center = VecHelper.getCenterOf(pos);
+			float flowLimit = maxPullDistance;
-			AxisAlignedBB searchArea =
+			if (flowLimit > 0)
-				new AxisAlignedBB(center.add(0, -bottomPullDistance - 0.5, 0), center.add(0, -0.5, 0)).grow(.45f);
+				flowLimit = AirCurrent.getFlowLimit(world, pos, maxPullDistance, Direction.DOWN);
-			for (ItemEntity itemEntity : world.getEntitiesWithinAABB(ItemEntity.class, searchArea)) {
+
-				setItem(itemEntity.getItem()
+			for (int i = 1; i <= flowLimit + 1; i++) {
-					.copy(),
+				TransportedItemStackHandlerBehaviour behaviour =
-					(float) (itemEntity.getBoundingBox()
+					TileEntityBehaviour.get(world, pos.down(i), TransportedItemStackHandlerBehaviour.TYPE);
-						.getCenter().y - pos.getY()));
+				if (behaviour == null)
-				itemEntity.remove();
+					continue;
+				beltBelow = behaviour;
+				beltBelowOffset = i - 1;
 				break;
 			}
+			this.bottomPullDistance = flowLimit;
 		}
+		sendData();
+	}
 
+	private void findEntities(float itemSpeed) {
+		if (getSpeed() != 0)
+			airCurrent.findEntities();
+		if (bottomPullDistance <= 0 && !getItem().isEmpty() ||  itemSpeed <= 0 || world == null || world.isRemote)
+			return;
+		Vec3d center = VecHelper.getCenterOf(pos);
+		AxisAlignedBB searchArea =
+			new AxisAlignedBB(center.add(0, -bottomPullDistance - 0.5, 0), center.add(0, -0.5, 0)).grow(.45f);
+		for (ItemEntity itemEntity : world.getEntitiesWithinAABB(ItemEntity.class, searchArea)) {
+			setItem(itemEntity.getItem()
+					.copy(),
+				(float) (itemEntity.getBoundingBox()
+					.getCenter().y - pos.getY()));
+			itemEntity.remove();
+			break;
+		}
+	}
+
+	private void extractFromBelt(float itemSpeed) {
+		if (itemSpeed <= 0 || world == null || world.isRemote)
+			return;
 		if (getItem().isEmpty() && beltBelow != null) {
 			beltBelow.handleCenteredProcessingOnAllItems(.5f, ts -> {
 				if (getItem().isEmpty()) {
@@ -199,46 +239,26 @@ public class ChuteTileEntity extends SmartTileEntity implements IHaveGoggleInfor
 				return TransportedResult.doNothing();
 			});
 		}
+	}
 
-		if (!updateAirFlow)
+	private void tickAirStreams(float itemSpeed) {
-			return;
+		if (!world.isRemote && airCurrentUpdateCooldown-- <= 0) {
-
+			airCurrentUpdateCooldown = AllConfigs.SERVER.kinetics.fanBlockCheckRate.get();
-		float speed = pull - push;
+			updateAirFlow = true;
-		float flowLimit = 0;
-		updateAirFlow = false;
-		beltBelow = null;
-
-		float maxPullDistance;
-		if (speed >= 128)
-			maxPullDistance = 3;
-		else if (speed >= 64)
-			maxPullDistance = 2;
-		else if (speed >= 32)
-			maxPullDistance = 1;
-		else
-			maxPullDistance = MathHelper.lerp(speed / 32, 0, 1);
-
-		if (AllBlocks.CHUTE.has(world.getBlockState(pos.down())))
-			maxPullDistance = 0;
-		flowLimit = maxPullDistance;
-		if (flowLimit > 0)
-			flowLimit = AirCurrent.getFlowLimit(world, pos, maxPullDistance, Direction.DOWN);
-
-		for (int i = 1; i <= flowLimit + 1; i++) {
-			TransportedItemStackHandlerBehaviour behaviour =
-				TileEntityBehaviour.get(world, pos.down(i), TransportedItemStackHandlerBehaviour.TYPE);
-			if (behaviour == null)
-				continue;
-			beltBelow = behaviour;
-			beltBelowOffset = i - 1;
-			break;
 		}
 
-		if (bottomPullDistance == flowLimit)
+		if (updateAirFlow) {
-			return;
+			updateAirFlow(itemSpeed);
+		}
 
-		this.bottomPullDistance = flowLimit;
+		if (entitySearchCooldown-- <= 0) {
-		sendData();
+			entitySearchCooldown = 5;
+			findEntities(itemSpeed);
+		}
+
+		extractFromBelt(itemSpeed);
+		if (getSpeed() != 0)
+			airCurrent.tick();
 	}
 
 	public void blockBelowChanged() {
@@ -246,6 +266,9 @@ public class ChuteTileEntity extends SmartTileEntity implements IHaveGoggleInfor
 	}
 
 	private void spawnParticles(float itemMotion) {
+		// todo: reduce the amount of particles
+		if (world == null)
+			return;
 		BlockState blockState = getBlockState();
 		boolean up = itemMotion > 0;
 		float absMotion = up ? itemMotion : -itemMotion;
@@ -276,6 +299,8 @@ public class ChuteTileEntity extends SmartTileEntity implements IHaveGoggleInfor
 	}
 
 	private void spawnAirFlow(float verticalStart, float verticalEnd, float motion, float drag) {
+		if (world == null)
+			return;
 		AirParticleData airParticleData = new AirParticleData(drag, motion);
 		Vec3d origin = new Vec3d(pos);
 		float xOff = Create.random.nextFloat() * .5f + .25f;
@@ -292,7 +317,7 @@ public class ChuteTileEntity extends SmartTileEntity implements IHaveGoggleInfor
 			capAbove = grabCapability(Direction.UP);
 		if (capAbove.isPresent())
 			item =
-				ItemHelper.extract(capAbove.orElse(null), Predicates.alwaysTrue(), ExtractionCountMode.UPTO, 16, false);
+				ItemHelper.extract(capAbove.orElse(null), stack -> true, ExtractionCountMode.UPTO, 16, false);
 	}
 
 	private void handleInputFromBelow() {
@@ -300,7 +325,7 @@ public class ChuteTileEntity extends SmartTileEntity implements IHaveGoggleInfor
 			capBelow = grabCapability(Direction.DOWN);
 		if (capBelow.isPresent())
 			item =
-				ItemHelper.extract(capBelow.orElse(null), Predicates.alwaysTrue(), ExtractionCountMode.UPTO, 16, false);
+				ItemHelper.extract(capBelow.orElse(null), stack -> true, ExtractionCountMode.UPTO, 16, false);
 	}
 
 	private boolean handleDownwardOutput(boolean simulate) {
@@ -318,7 +343,7 @@ public class ChuteTileEntity extends SmartTileEntity implements IHaveGoggleInfor
 		}
 
 		// Diagonal chutes can only insert into other chutes
-		if (direction.getAxis()
+		if (world == null || direction.getAxis()
 			.isHorizontal())
 			return false;
 
@@ -433,6 +458,8 @@ public class ChuteTileEntity extends SmartTileEntity implements IHaveGoggleInfor
 
 	private LazyOptional<IItemHandler> grabCapability(Direction side) {
 		BlockPos pos = this.pos.offset(side);
+		if (world == null)
+			return LazyOptional.empty();
 		TileEntity te = world.getTileEntity(pos);
 		if (te == null || te instanceof ChuteTileEntity)
 			return LazyOptional.empty();
@@ -476,8 +503,10 @@ public class ChuteTileEntity extends SmartTileEntity implements IHaveGoggleInfor
 		push = compound.getFloat("Push");
 		bottomPullDistance = compound.getFloat("BottomAirFlowDistance");
 		super.read(compound, clientPacket);
+		if (clientPacket)
+			airCurrent.rebuild();
 
-		if (hasWorld() && world.isRemote && !previousItem.equals(item, false) && !item.isEmpty()) {
+		if (hasWorld() && world != null && world.isRemote && !previousItem.equals(item, false) && !item.isEmpty()) {
 			if (world.rand.nextInt(3) != 0)
 				return;
 			Vec3d p = VecHelper.getCenterOf(pos);
@@ -500,7 +529,7 @@ public class ChuteTileEntity extends SmartTileEntity implements IHaveGoggleInfor
 	public void onRemoved(BlockState chuteState) {
 		ChuteTileEntity targetChute = getTargetChute(chuteState);
 		List<ChuteTileEntity> inputChutes = getInputChutes();
-		if (!item.isEmpty())
+		if (!item.isEmpty() && world != null)
 			InventoryHelper.spawnItemStack(world, pos.getX(), pos.getY(), pos.getZ(), item);
 		remove();
 		if (targetChute != null) {
@@ -569,6 +598,8 @@ public class ChuteTileEntity extends SmartTileEntity implements IHaveGoggleInfor
 	}
 
 	protected float calculatePush(int branchCount) {
+		if (world == null)
+			return 0;
 		BlockState blockStateBelow = world.getBlockState(pos.down());
 		if (AllBlocks.ENCASED_FAN.has(blockStateBelow) && blockStateBelow.get(EncasedFanBlock.FACING) == Direction.UP) {
 			TileEntity te = world.getTileEntity(pos.down());
@@ -586,6 +617,8 @@ public class ChuteTileEntity extends SmartTileEntity implements IHaveGoggleInfor
 
 	@Nullable
 	private ChuteTileEntity getTargetChute(BlockState state) {
+		if (world == null)
+			return null;
 		Direction targetDirection = state.get(ChuteBlock.FACING);
 		BlockPos chutePos = pos.down();
 		if (targetDirection.getAxis()
@@ -613,7 +646,7 @@ public class ChuteTileEntity extends SmartTileEntity implements IHaveGoggleInfor
 
 	@Nullable
 	private ChuteTileEntity getInputChute(Direction direction) {
-		if (direction == Direction.DOWN)
+		if (world == null || direction == Direction.DOWN)
 			return null;
 		direction = direction.getOpposite();
 		BlockPos chutePos = pos.up();
@@ -638,7 +671,7 @@ public class ChuteTileEntity extends SmartTileEntity implements IHaveGoggleInfor
 	}
 
 	@Override
-	public <T> LazyOptional<T> getCapability(Capability<T> cap, Direction side) {
+	public <T> LazyOptional<T> getCapability(Capability<T> cap, @Nullable Direction side) {
 		if (cap == CapabilityItemHandler.ITEM_HANDLER_CAPABILITY)
 			return lazyHandler.cast();
 		return super.getCapability(cap, side);
@@ -648,4 +681,31 @@ public class ChuteTileEntity extends SmartTileEntity implements IHaveGoggleInfor
 		return item;
 	}
 
+	@Override
+	@Nullable
+	public AirCurrent getAirCurrent() {
+		return airCurrent;
+	}
+
+	@Override
+	public float getSpeed() {
+		if (getBlockState().get(ChuteBlock.SHAPE) == Shape.NORMAL && getBlockState().get(ChuteBlock.FACING) != Direction.DOWN)
+			return 0;
+		return pull + push;
+	}
+
+	@Override
+	@Nullable
+	public Direction getAirFlowDirection() {
+		float speed = getSpeed();
+		if (speed == 0)
+			return null;
+		return speed > 0 ? Direction.UP : Direction.DOWN;
+	}
+
+	@Override
+	public Direction getAirflowOriginSide() {
+		return world != null && !(world.getTileEntity(pos.down()) instanceof IAirCurrentSource)
+			&& getBlockState().get(ChuteBlock.FACING) == Direction.DOWN ? Direction.DOWN : Direction.UP;
+	}
 }

src/main/java/com/simibubi/create/content/logistics/block/depot/DepotTileEntity.java

@@ -5,6 +5,7 @@ import java.util.function.Function;
 
 import com.simibubi.create.content.contraptions.relays.belt.BeltHelper;
 import com.simibubi.create.content.contraptions.relays.belt.transport.TransportedItemStack;
+import com.simibubi.create.content.logistics.InWorldProcessing;
 import com.simibubi.create.foundation.tileEntity.SmartTileEntity;
 import com.simibubi.create.foundation.tileEntity.TileEntityBehaviour;
 import com.simibubi.create.foundation.tileEntity.behaviour.belt.BeltProcessingBehaviour;
@@ -177,7 +178,7 @@ public class DepotTileEntity extends SmartTileEntity {
 		TransportedItemStack transportedItemStack = heldItem;
 		ItemStack stackBefore = transportedItemStack.stack.copy();
 		TransportedResult result = processFunction.apply(transportedItemStack);
-		if (result.didntChangeFrom(stackBefore))
+		if (result == null || result.didntChangeFrom(stackBefore))
 			return;
 
 		dirty = true;