minecraft-src/net/minecraft/world/entity/vehicle/AbstractMinecart.java

package net.minecraft.world.entity.vehicle;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Maps;
import com.mojang.datafixers.util.Pair;
import java.util.List;
import java.util.Map;
import net.minecraft.BlockUtil;
import net.minecraft.Util;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.core.Vec3i;
import net.minecraft.core.registries.Registries;
import net.minecraft.nbt.CompoundTag;
import net.minecraft.nbt.NbtUtils;
import net.minecraft.network.syncher.EntityDataAccessor;
import net.minecraft.network.syncher.EntityDataSerializers;
import net.minecraft.network.syncher.SynchedEntityData;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.tags.BlockTags;
import net.minecraft.util.Mth;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.entity.EntityDimensions;
import net.minecraft.world.entity.EntitySelector;
import net.minecraft.world.entity.EntityType;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.entity.MoverType;
import net.minecraft.world.entity.Pose;
import net.minecraft.world.entity.animal.IronGolem;
import net.minecraft.world.entity.npc.Villager;
import net.minecraft.world.entity.npc.WanderingTrader;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.Items;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.block.BaseRailBlock;
import net.minecraft.world.level.block.Block;
import net.minecraft.world.level.block.Blocks;
import net.minecraft.world.level.block.PoweredRailBlock;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.block.state.properties.RailShape;
import net.minecraft.world.phys.AABB;
import net.minecraft.world.phys.Vec3;
import org.jetbrains.annotations.Nullable;

public abstract class AbstractMinecart extends VehicleEntity {
	private static final Vec3 LOWERED_PASSENGER_ATTACHMENT = new Vec3(0.0, 0.0, 0.0);
	private static final EntityDataAccessor<Integer> DATA_ID_DISPLAY_BLOCK = SynchedEntityData.defineId(AbstractMinecart.class, EntityDataSerializers.INT);
	private static final EntityDataAccessor<Integer> DATA_ID_DISPLAY_OFFSET = SynchedEntityData.defineId(AbstractMinecart.class, EntityDataSerializers.INT);
	private static final EntityDataAccessor<Boolean> DATA_ID_CUSTOM_DISPLAY = SynchedEntityData.defineId(AbstractMinecart.class, EntityDataSerializers.BOOLEAN);
	private static final ImmutableMap<Pose, ImmutableList<Integer>> POSE_DISMOUNT_HEIGHTS = ImmutableMap.of(
		Pose.STANDING, ImmutableList.of(0, 1, -1), Pose.CROUCHING, ImmutableList.of(0, 1, -1), Pose.SWIMMING, ImmutableList.of(0, 1)
	);
	protected static final float WATER_SLOWDOWN_FACTOR = 0.95F;
	private boolean flipped;
	private boolean onRails;
	private int lerpSteps;
	private double lerpX;
	private double lerpY;
	private double lerpZ;
	private double lerpYRot;
	private double lerpXRot;
	private Vec3 targetDeltaMovement = Vec3.ZERO;
	private static final Map<RailShape, Pair<Vec3i, Vec3i>> EXITS = Util.make(Maps.newEnumMap(RailShape.class), enumMap -> {
		Vec3i vec3i = Direction.WEST.getNormal();
		Vec3i vec3i2 = Direction.EAST.getNormal();
		Vec3i vec3i3 = Direction.NORTH.getNormal();
		Vec3i vec3i4 = Direction.SOUTH.getNormal();
		Vec3i vec3i5 = vec3i.below();
		Vec3i vec3i6 = vec3i2.below();
		Vec3i vec3i7 = vec3i3.below();
		Vec3i vec3i8 = vec3i4.below();
		enumMap.put(RailShape.NORTH_SOUTH, Pair.of(vec3i3, vec3i4));
		enumMap.put(RailShape.EAST_WEST, Pair.of(vec3i, vec3i2));
		enumMap.put(RailShape.ASCENDING_EAST, Pair.of(vec3i5, vec3i2));
		enumMap.put(RailShape.ASCENDING_WEST, Pair.of(vec3i, vec3i6));
		enumMap.put(RailShape.ASCENDING_NORTH, Pair.of(vec3i3, vec3i8));
		enumMap.put(RailShape.ASCENDING_SOUTH, Pair.of(vec3i7, vec3i4));
		enumMap.put(RailShape.SOUTH_EAST, Pair.of(vec3i4, vec3i2));
		enumMap.put(RailShape.SOUTH_WEST, Pair.of(vec3i4, vec3i));
		enumMap.put(RailShape.NORTH_WEST, Pair.of(vec3i3, vec3i));
		enumMap.put(RailShape.NORTH_EAST, Pair.of(vec3i3, vec3i2));
	});

	protected AbstractMinecart(EntityType<?> entityType, Level level) {
		super(entityType, level);
		this.blocksBuilding = true;
	}

	protected AbstractMinecart(EntityType<?> entityType, Level level, double x, double y, double z) {
		this(entityType, level);
		this.setPos(x, y, z);
		this.xo = x;
		this.yo = y;
		this.zo = z;
	}

	public static AbstractMinecart createMinecart(
		ServerLevel level, double x, double y, double z, AbstractMinecart.Type type, ItemStack stack, @Nullable Player player
	) {
		AbstractMinecart abstractMinecart = (AbstractMinecart)(switch (type) {
			case CHEST -> new MinecartChest(level, x, y, z);
			case FURNACE -> new MinecartFurnace(level, x, y, z);
			case TNT -> new MinecartTNT(level, x, y, z);
			case SPAWNER -> new MinecartSpawner(level, x, y, z);
			case HOPPER -> new MinecartHopper(level, x, y, z);
			case COMMAND_BLOCK -> new MinecartCommandBlock(level, x, y, z);
			default -> new Minecart(level, x, y, z);
		});
		EntityType.createDefaultStackConfig(level, stack, player).accept(abstractMinecart);
		return abstractMinecart;
	}

	@Override
	protected Entity.MovementEmission getMovementEmission() {
		return Entity.MovementEmission.EVENTS;
	}

	@Override
	protected void defineSynchedData(SynchedEntityData.Builder builder) {
		super.defineSynchedData(builder);
		builder.define(DATA_ID_DISPLAY_BLOCK, Block.getId(Blocks.AIR.defaultBlockState()));
		builder.define(DATA_ID_DISPLAY_OFFSET, 6);
		builder.define(DATA_ID_CUSTOM_DISPLAY, false);
	}

	@Override
	public boolean canCollideWith(Entity entity) {
		return Boat.canVehicleCollide(this, entity);
	}

	@Override
	public boolean isPushable() {
		return true;
	}

	@Override
	public Vec3 getRelativePortalPosition(Direction.Axis axis, BlockUtil.FoundRectangle portal) {
		return LivingEntity.resetForwardDirectionOfRelativePortalPosition(super.getRelativePortalPosition(axis, portal));
	}

	@Override
	protected Vec3 getPassengerAttachmentPoint(Entity entity, EntityDimensions dimensions, float partialTick) {
		boolean bl = entity instanceof Villager || entity instanceof WanderingTrader;
		return bl ? LOWERED_PASSENGER_ATTACHMENT : super.getPassengerAttachmentPoint(entity, dimensions, partialTick);
	}

	@Override
	public Vec3 getDismountLocationForPassenger(LivingEntity passenger) {
		Direction direction = this.getMotionDirection();
		if (direction.getAxis() == Direction.Axis.Y) {
			return super.getDismountLocationForPassenger(passenger);
		} else {
			int[][] is = DismountHelper.offsetsForDirection(direction);
			BlockPos blockPos = this.blockPosition();
			BlockPos.MutableBlockPos mutableBlockPos = new BlockPos.MutableBlockPos();
			ImmutableList<Pose> immutableList = passenger.getDismountPoses();

			for (Pose pose : immutableList) {
				EntityDimensions entityDimensions = passenger.getDimensions(pose);
				float f = Math.min(entityDimensions.width(), 1.0F) / 2.0F;

				for (int i : POSE_DISMOUNT_HEIGHTS.get(pose)) {
					for (int[] js : is) {
						mutableBlockPos.set(blockPos.getX() + js[0], blockPos.getY() + i, blockPos.getZ() + js[1]);
						double d = this.level()
							.getBlockFloorHeight(
								DismountHelper.nonClimbableShape(this.level(), mutableBlockPos), () -> DismountHelper.nonClimbableShape(this.level(), mutableBlockPos.below())
							);
						if (DismountHelper.isBlockFloorValid(d)) {
							AABB aABB = new AABB(-f, 0.0, -f, f, entityDimensions.height(), f);
							Vec3 vec3 = Vec3.upFromBottomCenterOf(mutableBlockPos, d);
							if (DismountHelper.canDismountTo(this.level(), passenger, aABB.move(vec3))) {
								passenger.setPose(pose);
								return vec3;
							}
						}
					}
				}
			}

			double e = this.getBoundingBox().maxY;
			mutableBlockPos.set((double)blockPos.getX(), e, (double)blockPos.getZ());

			for (Pose pose2 : immutableList) {
				double g = passenger.getDimensions(pose2).height();
				int j = Mth.ceil(e - mutableBlockPos.getY() + g);
				double h = DismountHelper.findCeilingFrom(mutableBlockPos, j, blockPosx -> this.level().getBlockState(blockPosx).getCollisionShape(this.level(), blockPosx));
				if (e + g <= h) {
					passenger.setPose(pose2);
					break;
				}
			}

			return super.getDismountLocationForPassenger(passenger);
		}
	}

	@Override
	protected float getBlockSpeedFactor() {
		BlockState blockState = this.level().getBlockState(this.blockPosition());
		return blockState.is(BlockTags.RAILS) ? 1.0F : super.getBlockSpeedFactor();
	}

	@Override
	public void animateHurt(float yaw) {
		this.setHurtDir(-this.getHurtDir());
		this.setHurtTime(10);
		this.setDamage(this.getDamage() + this.getDamage() * 10.0F);
	}

	@Override
	public boolean isPickable() {
		return !this.isRemoved();
	}

	private static Pair<Vec3i, Vec3i> exits(RailShape shape) {
		return (Pair<Vec3i, Vec3i>)EXITS.get(shape);
	}

	@Override
	public Direction getMotionDirection() {
		return this.flipped ? this.getDirection().getOpposite().getClockWise() : this.getDirection().getClockWise();
	}

	@Override
	protected double getDefaultGravity() {
		return this.isInWater() ? 0.005 : 0.04;
	}

	@Override
	public void tick() {
		if (this.getHurtTime() > 0) {
			this.setHurtTime(this.getHurtTime() - 1);
		}

		if (this.getDamage() > 0.0F) {
			this.setDamage(this.getDamage() - 1.0F);
		}

		this.checkBelowWorld();
		this.handlePortal();
		if (this.level().isClientSide) {
			if (this.lerpSteps > 0) {
				this.lerpPositionAndRotationStep(this.lerpSteps, this.lerpX, this.lerpY, this.lerpZ, this.lerpYRot, this.lerpXRot);
				this.lerpSteps--;
			} else {
				this.reapplyPosition();
				this.setRot(this.getYRot(), this.getXRot());
			}
		} else {
			this.applyGravity();
			int i = Mth.floor(this.getX());
			int j = Mth.floor(this.getY());
			int k = Mth.floor(this.getZ());
			if (this.level().getBlockState(new BlockPos(i, j - 1, k)).is(BlockTags.RAILS)) {
				j--;
			}

			BlockPos blockPos = new BlockPos(i, j, k);
			BlockState blockState = this.level().getBlockState(blockPos);
			this.onRails = BaseRailBlock.isRail(blockState);
			if (this.onRails) {
				this.moveAlongTrack(blockPos, blockState);
				if (blockState.is(Blocks.ACTIVATOR_RAIL)) {
					this.activateMinecart(i, j, k, (Boolean)blockState.getValue(PoweredRailBlock.POWERED));
				}
			} else {
				this.comeOffTrack();
			}

			this.checkInsideBlocks();
			this.setXRot(0.0F);
			double d = this.xo - this.getX();
			double e = this.zo - this.getZ();
			if (d * d + e * e > 0.001) {
				this.setYRot((float)(Mth.atan2(e, d) * 180.0 / Math.PI));
				if (this.flipped) {
					this.setYRot(this.getYRot() + 180.0F);
				}
			}

			double f = Mth.wrapDegrees(this.getYRot() - this.yRotO);
			if (f < -170.0 || f >= 170.0) {
				this.setYRot(this.getYRot() + 180.0F);
				this.flipped = !this.flipped;
			}

			this.setRot(this.getYRot(), this.getXRot());
			if (this.getMinecartType() == AbstractMinecart.Type.RIDEABLE && this.getDeltaMovement().horizontalDistanceSqr() > 0.01) {
				List<Entity> list = this.level().getEntities(this, this.getBoundingBox().inflate(0.2F, 0.0, 0.2F), EntitySelector.pushableBy(this));
				if (!list.isEmpty()) {
					for (Entity entity : list) {
						if (!(entity instanceof Player) && !(entity instanceof IronGolem) && !(entity instanceof AbstractMinecart) && !this.isVehicle() && !entity.isPassenger()) {
							entity.startRiding(this);
						} else {
							entity.push(this);
						}
					}
				}
			} else {
				for (Entity entity2 : this.level().getEntities(this, this.getBoundingBox().inflate(0.2F, 0.0, 0.2F))) {
					if (!this.hasPassenger(entity2) && entity2.isPushable() && entity2 instanceof AbstractMinecart) {
						entity2.push(this);
					}
				}
			}

			this.updateInWaterStateAndDoFluidPushing();
			if (this.isInLava()) {
				this.lavaHurt();
				this.fallDistance *= 0.5F;
			}

			this.firstTick = false;
		}
	}

	/**
	 * Gets the maximum speed for a minecart
	 */
	protected double getMaxSpeed() {
		return (this.isInWater() ? 4.0 : 8.0) / 20.0;
	}

	/**
	 * Called every tick the minecart is on an activator rail.
	 */
	public void activateMinecart(int x, int y, int z, boolean powered) {
	}

	/**
	 * Moves a minecart that is not attached to a rail
	 */
	protected void comeOffTrack() {
		double d = this.getMaxSpeed();
		Vec3 vec3 = this.getDeltaMovement();
		this.setDeltaMovement(Mth.clamp(vec3.x, -d, d), vec3.y, Mth.clamp(vec3.z, -d, d));
		if (this.onGround()) {
			this.setDeltaMovement(this.getDeltaMovement().scale(0.5));
		}

		this.move(MoverType.SELF, this.getDeltaMovement());
		if (!this.onGround()) {
			this.setDeltaMovement(this.getDeltaMovement().scale(0.95));
		}
	}

	protected void moveAlongTrack(BlockPos pos, BlockState state) {
		this.resetFallDistance();
		double d = this.getX();
		double e = this.getY();
		double f = this.getZ();
		Vec3 vec3 = this.getPos(d, e, f);
		e = pos.getY();
		boolean bl = false;
		boolean bl2 = false;
		if (state.is(Blocks.POWERED_RAIL)) {
			bl = (Boolean)state.getValue(PoweredRailBlock.POWERED);
			bl2 = !bl;
		}

		double g = 0.0078125;
		if (this.isInWater()) {
			g *= 0.2;
		}

		Vec3 vec32 = this.getDeltaMovement();
		RailShape railShape = state.getValue(((BaseRailBlock)state.getBlock()).getShapeProperty());
		switch (railShape) {
			case ASCENDING_EAST:
				this.setDeltaMovement(vec32.add(-g, 0.0, 0.0));
				e++;
				break;
			case ASCENDING_WEST:
				this.setDeltaMovement(vec32.add(g, 0.0, 0.0));
				e++;
				break;
			case ASCENDING_NORTH:
				this.setDeltaMovement(vec32.add(0.0, 0.0, g));
				e++;
				break;
			case ASCENDING_SOUTH:
				this.setDeltaMovement(vec32.add(0.0, 0.0, -g));
				e++;
		}

		vec32 = this.getDeltaMovement();
		Pair<Vec3i, Vec3i> pair = exits(railShape);
		Vec3i vec3i = pair.getFirst();
		Vec3i vec3i2 = pair.getSecond();
		double h = vec3i2.getX() - vec3i.getX();
		double i = vec3i2.getZ() - vec3i.getZ();
		double j = Math.sqrt(h * h + i * i);
		double k = vec32.x * h + vec32.z * i;
		if (k < 0.0) {
			h = -h;
			i = -i;
		}

		double l = Math.min(2.0, vec32.horizontalDistance());
		vec32 = new Vec3(l * h / j, vec32.y, l * i / j);
		this.setDeltaMovement(vec32);
		Entity entity = this.getFirstPassenger();
		if (entity instanceof Player) {
			Vec3 vec33 = entity.getDeltaMovement();
			double m = vec33.horizontalDistanceSqr();
			double n = this.getDeltaMovement().horizontalDistanceSqr();
			if (m > 1.0E-4 && n < 0.01) {
				this.setDeltaMovement(this.getDeltaMovement().add(vec33.x * 0.1, 0.0, vec33.z * 0.1));
				bl2 = false;
			}
		}

		if (bl2) {
			double o = this.getDeltaMovement().horizontalDistance();
			if (o < 0.03) {
				this.setDeltaMovement(Vec3.ZERO);
			} else {
				this.setDeltaMovement(this.getDeltaMovement().multiply(0.5, 0.0, 0.5));
			}
		}

		double o = pos.getX() + 0.5 + vec3i.getX() * 0.5;
		double p = pos.getZ() + 0.5 + vec3i.getZ() * 0.5;
		double q = pos.getX() + 0.5 + vec3i2.getX() * 0.5;
		double r = pos.getZ() + 0.5 + vec3i2.getZ() * 0.5;
		h = q - o;
		i = r - p;
		double s;
		if (h == 0.0) {
			s = f - pos.getZ();
		} else if (i == 0.0) {
			s = d - pos.getX();
		} else {
			double t = d - o;
			double u = f - p;
			s = (t * h + u * i) * 2.0;
		}

		d = o + h * s;
		f = p + i * s;
		this.setPos(d, e, f);
		double t = this.isVehicle() ? 0.75 : 1.0;
		double u = this.getMaxSpeed();
		vec32 = this.getDeltaMovement();
		this.move(MoverType.SELF, new Vec3(Mth.clamp(t * vec32.x, -u, u), 0.0, Mth.clamp(t * vec32.z, -u, u)));
		if (vec3i.getY() != 0 && Mth.floor(this.getX()) - pos.getX() == vec3i.getX() && Mth.floor(this.getZ()) - pos.getZ() == vec3i.getZ()) {
			this.setPos(this.getX(), this.getY() + vec3i.getY(), this.getZ());
		} else if (vec3i2.getY() != 0 && Mth.floor(this.getX()) - pos.getX() == vec3i2.getX() && Mth.floor(this.getZ()) - pos.getZ() == vec3i2.getZ()) {
			this.setPos(this.getX(), this.getY() + vec3i2.getY(), this.getZ());
		}

		this.applyNaturalSlowdown();
		Vec3 vec34 = this.getPos(this.getX(), this.getY(), this.getZ());
		if (vec34 != null && vec3 != null) {
			double v = (vec3.y - vec34.y) * 0.05;
			Vec3 vec35 = this.getDeltaMovement();
			double w = vec35.horizontalDistance();
			if (w > 0.0) {
				this.setDeltaMovement(vec35.multiply((w + v) / w, 1.0, (w + v) / w));
			}

			this.setPos(this.getX(), vec34.y, this.getZ());
		}

		int x = Mth.floor(this.getX());
		int y = Mth.floor(this.getZ());
		if (x != pos.getX() || y != pos.getZ()) {
			Vec3 vec35 = this.getDeltaMovement();
			double w = vec35.horizontalDistance();
			this.setDeltaMovement(w * (x - pos.getX()), vec35.y, w * (y - pos.getZ()));
		}

		if (bl) {
			Vec3 vec35 = this.getDeltaMovement();
			double w = vec35.horizontalDistance();
			if (w > 0.01) {
				double z = 0.06;
				this.setDeltaMovement(vec35.add(vec35.x / w * 0.06, 0.0, vec35.z / w * 0.06));
			} else {
				Vec3 vec36 = this.getDeltaMovement();
				double aa = vec36.x;
				double ab = vec36.z;
				if (railShape == RailShape.EAST_WEST) {
					if (this.isRedstoneConductor(pos.west())) {
						aa = 0.02;
					} else if (this.isRedstoneConductor(pos.east())) {
						aa = -0.02;
					}
				} else {
					if (railShape != RailShape.NORTH_SOUTH) {
						return;
					}

					if (this.isRedstoneConductor(pos.north())) {
						ab = 0.02;
					} else if (this.isRedstoneConductor(pos.south())) {
						ab = -0.02;
					}
				}

				this.setDeltaMovement(aa, vec36.y, ab);
			}
		}
	}

	@Override
	public boolean isOnRails() {
		return this.onRails;
	}

	private boolean isRedstoneConductor(BlockPos pos) {
		return this.level().getBlockState(pos).isRedstoneConductor(this.level(), pos);
	}

	protected void applyNaturalSlowdown() {
		double d = this.isVehicle() ? 0.997 : 0.96;
		Vec3 vec3 = this.getDeltaMovement();
		vec3 = vec3.multiply(d, 0.0, d);
		if (this.isInWater()) {
			vec3 = vec3.scale(0.95F);
		}

		this.setDeltaMovement(vec3);
	}

	@Nullable
	public Vec3 getPosOffs(double x, double y, double z, double offset) {
		int i = Mth.floor(x);
		int j = Mth.floor(y);
		int k = Mth.floor(z);
		if (this.level().getBlockState(new BlockPos(i, j - 1, k)).is(BlockTags.RAILS)) {
			j--;
		}

		BlockState blockState = this.level().getBlockState(new BlockPos(i, j, k));
		if (BaseRailBlock.isRail(blockState)) {
			RailShape railShape = blockState.getValue(((BaseRailBlock)blockState.getBlock()).getShapeProperty());
			y = j;
			if (railShape.isAscending()) {
				y = j + 1;
			}

			Pair<Vec3i, Vec3i> pair = exits(railShape);
			Vec3i vec3i = pair.getFirst();
			Vec3i vec3i2 = pair.getSecond();
			double d = vec3i2.getX() - vec3i.getX();
			double e = vec3i2.getZ() - vec3i.getZ();
			double f = Math.sqrt(d * d + e * e);
			d /= f;
			e /= f;
			x += d * offset;
			z += e * offset;
			if (vec3i.getY() != 0 && Mth.floor(x) - i == vec3i.getX() && Mth.floor(z) - k == vec3i.getZ()) {
				y += vec3i.getY();
			} else if (vec3i2.getY() != 0 && Mth.floor(x) - i == vec3i2.getX() && Mth.floor(z) - k == vec3i2.getZ()) {
				y += vec3i2.getY();
			}

			return this.getPos(x, y, z);
		} else {
			return null;
		}
	}

	@Nullable
	public Vec3 getPos(double x, double y, double z) {
		int i = Mth.floor(x);
		int j = Mth.floor(y);
		int k = Mth.floor(z);
		if (this.level().getBlockState(new BlockPos(i, j - 1, k)).is(BlockTags.RAILS)) {
			j--;
		}

		BlockState blockState = this.level().getBlockState(new BlockPos(i, j, k));
		if (BaseRailBlock.isRail(blockState)) {
			RailShape railShape = blockState.getValue(((BaseRailBlock)blockState.getBlock()).getShapeProperty());
			Pair<Vec3i, Vec3i> pair = exits(railShape);
			Vec3i vec3i = pair.getFirst();
			Vec3i vec3i2 = pair.getSecond();
			double d = i + 0.5 + vec3i.getX() * 0.5;
			double e = j + 0.0625 + vec3i.getY() * 0.5;
			double f = k + 0.5 + vec3i.getZ() * 0.5;
			double g = i + 0.5 + vec3i2.getX() * 0.5;
			double h = j + 0.0625 + vec3i2.getY() * 0.5;
			double l = k + 0.5 + vec3i2.getZ() * 0.5;
			double m = g - d;
			double n = (h - e) * 2.0;
			double o = l - f;
			double p;
			if (m == 0.0) {
				p = z - k;
			} else if (o == 0.0) {
				p = x - i;
			} else {
				double q = x - d;
				double r = z - f;
				p = (q * m + r * o) * 2.0;
			}

			x = d + m * p;
			y = e + n * p;
			z = f + o * p;
			if (n < 0.0) {
				y++;
			} else if (n > 0.0) {
				y += 0.5;
			}

			return new Vec3(x, y, z);
		} else {
			return null;
		}
	}

	@Override
	public AABB getBoundingBoxForCulling() {
		AABB aABB = this.getBoundingBox();
		return this.hasCustomDisplay() ? aABB.inflate(Math.abs(this.getDisplayOffset()) / 16.0) : aABB;
	}

	@Override
	protected void readAdditionalSaveData(CompoundTag compound) {
		if (compound.getBoolean("CustomDisplayTile")) {
			this.setDisplayBlockState(NbtUtils.readBlockState(this.level().holderLookup(Registries.BLOCK), compound.getCompound("DisplayState")));
			this.setDisplayOffset(compound.getInt("DisplayOffset"));
		}
	}

	@Override
	protected void addAdditionalSaveData(CompoundTag compound) {
		if (this.hasCustomDisplay()) {
			compound.putBoolean("CustomDisplayTile", true);
			compound.put("DisplayState", NbtUtils.writeBlockState(this.getDisplayBlockState()));
			compound.putInt("DisplayOffset", this.getDisplayOffset());
		}
	}

	@Override
	public void push(Entity entity) {
		if (!this.level().isClientSide) {
			if (!entity.noPhysics && !this.noPhysics) {
				if (!this.hasPassenger(entity)) {
					double d = entity.getX() - this.getX();
					double e = entity.getZ() - this.getZ();
					double f = d * d + e * e;
					if (f >= 1.0E-4F) {
						f = Math.sqrt(f);
						d /= f;
						e /= f;
						double g = 1.0 / f;
						if (g > 1.0) {
							g = 1.0;
						}

						d *= g;
						e *= g;
						d *= 0.1F;
						e *= 0.1F;
						d *= 0.5;
						e *= 0.5;
						if (entity instanceof AbstractMinecart) {
							double h = entity.getX() - this.getX();
							double i = entity.getZ() - this.getZ();
							Vec3 vec3 = new Vec3(h, 0.0, i).normalize();
							Vec3 vec32 = new Vec3(Mth.cos(this.getYRot() * (float) (Math.PI / 180.0)), 0.0, Mth.sin(this.getYRot() * (float) (Math.PI / 180.0))).normalize();
							double j = Math.abs(vec3.dot(vec32));
							if (j < 0.8F) {
								return;
							}

							Vec3 vec33 = this.getDeltaMovement();
							Vec3 vec34 = entity.getDeltaMovement();
							if (((AbstractMinecart)entity).getMinecartType() == AbstractMinecart.Type.FURNACE && this.getMinecartType() != AbstractMinecart.Type.FURNACE) {
								this.setDeltaMovement(vec33.multiply(0.2, 1.0, 0.2));
								this.push(vec34.x - d, 0.0, vec34.z - e);
								entity.setDeltaMovement(vec34.multiply(0.95, 1.0, 0.95));
							} else if (((AbstractMinecart)entity).getMinecartType() != AbstractMinecart.Type.FURNACE && this.getMinecartType() == AbstractMinecart.Type.FURNACE) {
								entity.setDeltaMovement(vec34.multiply(0.2, 1.0, 0.2));
								entity.push(vec33.x + d, 0.0, vec33.z + e);
								this.setDeltaMovement(vec33.multiply(0.95, 1.0, 0.95));
							} else {
								double k = (vec34.x + vec33.x) / 2.0;
								double l = (vec34.z + vec33.z) / 2.0;
								this.setDeltaMovement(vec33.multiply(0.2, 1.0, 0.2));
								this.push(k - d, 0.0, l - e);
								entity.setDeltaMovement(vec34.multiply(0.2, 1.0, 0.2));
								entity.push(k + d, 0.0, l + e);
							}
						} else {
							this.push(-d, 0.0, -e);
							entity.push(d / 4.0, 0.0, e / 4.0);
						}
					}
				}
			}
		}
	}

	@Override
	public void lerpTo(double x, double y, double z, float yRot, float xRot, int steps) {
		this.lerpX = x;
		this.lerpY = y;
		this.lerpZ = z;
		this.lerpYRot = yRot;
		this.lerpXRot = xRot;
		this.lerpSteps = steps + 2;
		this.setDeltaMovement(this.targetDeltaMovement);
	}

	@Override
	public double lerpTargetX() {
		return this.lerpSteps > 0 ? this.lerpX : this.getX();
	}

	@Override
	public double lerpTargetY() {
		return this.lerpSteps > 0 ? this.lerpY : this.getY();
	}

	@Override
	public double lerpTargetZ() {
		return this.lerpSteps > 0 ? this.lerpZ : this.getZ();
	}

	@Override
	public float lerpTargetXRot() {
		return this.lerpSteps > 0 ? (float)this.lerpXRot : this.getXRot();
	}

	@Override
	public float lerpTargetYRot() {
		return this.lerpSteps > 0 ? (float)this.lerpYRot : this.getYRot();
	}

	@Override
	public void lerpMotion(double x, double y, double z) {
		this.targetDeltaMovement = new Vec3(x, y, z);
		this.setDeltaMovement(this.targetDeltaMovement);
	}

	public abstract AbstractMinecart.Type getMinecartType();

	public BlockState getDisplayBlockState() {
		return !this.hasCustomDisplay() ? this.getDefaultDisplayBlockState() : Block.stateById(this.getEntityData().get(DATA_ID_DISPLAY_BLOCK));
	}

	public BlockState getDefaultDisplayBlockState() {
		return Blocks.AIR.defaultBlockState();
	}

	public int getDisplayOffset() {
		return !this.hasCustomDisplay() ? this.getDefaultDisplayOffset() : this.getEntityData().get(DATA_ID_DISPLAY_OFFSET);
	}

	public int getDefaultDisplayOffset() {
		return 6;
	}

	public void setDisplayBlockState(BlockState displayState) {
		this.getEntityData().set(DATA_ID_DISPLAY_BLOCK, Block.getId(displayState));
		this.setCustomDisplay(true);
	}

	public void setDisplayOffset(int displayOffset) {
		this.getEntityData().set(DATA_ID_DISPLAY_OFFSET, displayOffset);
		this.setCustomDisplay(true);
	}

	public boolean hasCustomDisplay() {
		return this.getEntityData().get(DATA_ID_CUSTOM_DISPLAY);
	}

	public void setCustomDisplay(boolean customDisplay) {
		this.getEntityData().set(DATA_ID_CUSTOM_DISPLAY, customDisplay);
	}

	@Override
	public ItemStack getPickResult() {
		return new ItemStack(switch (this.getMinecartType()) {
			case CHEST -> Items.CHEST_MINECART;
			case FURNACE -> Items.FURNACE_MINECART;
			case TNT -> Items.TNT_MINECART;
			default -> Items.MINECART;
			case HOPPER -> Items.HOPPER_MINECART;
			case COMMAND_BLOCK -> Items.COMMAND_BLOCK_MINECART;
		});
	}

	public static enum Type {
		RIDEABLE,
		CHEST,
		FURNACE,
		TNT,
		SPAWNER,
		HOPPER,
		COMMAND_BLOCK;
	}
}