minecraft-src/net/minecraft/world/level/material/LavaFluid.java

package net.minecraft.world.level.material;

import java.util.Optional;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.core.particles.ParticleOptions;
import net.minecraft.core.particles.ParticleTypes;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.sounds.SoundEvent;
import net.minecraft.sounds.SoundEvents;
import net.minecraft.sounds.SoundSource;
import net.minecraft.tags.FluidTags;
import net.minecraft.util.RandomSource;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.entity.InsideBlockEffectApplier;
import net.minecraft.world.entity.InsideBlockEffectType;
import net.minecraft.world.item.Item;
import net.minecraft.world.item.Items;
import net.minecraft.world.level.BlockGetter;
import net.minecraft.world.level.GameRules;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.LevelAccessor;
import net.minecraft.world.level.LevelReader;
import net.minecraft.world.level.block.BaseFireBlock;
import net.minecraft.world.level.block.Blocks;
import net.minecraft.world.level.block.LiquidBlock;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.block.state.StateDefinition.Builder;
import org.jetbrains.annotations.Nullable;

public abstract class LavaFluid extends FlowingFluid {
	public static final float MIN_LEVEL_CUTOFF = 0.44444445F;

	@Override
	public Fluid getFlowing() {
		return Fluids.FLOWING_LAVA;
	}

	@Override
	public Fluid getSource() {
		return Fluids.LAVA;
	}

	@Override
	public Item getBucket() {
		return Items.LAVA_BUCKET;
	}

	@Override
	public void animateTick(Level level, BlockPos pos, FluidState state, RandomSource random) {
		BlockPos blockPos = pos.above();
		if (level.getBlockState(blockPos).isAir() && !level.getBlockState(blockPos).isSolidRender()) {
			if (random.nextInt(100) == 0) {
				double d = pos.getX() + random.nextDouble();
				double e = pos.getY() + 1.0;
				double f = pos.getZ() + random.nextDouble();
				level.addParticle(ParticleTypes.LAVA, d, e, f, 0.0, 0.0, 0.0);
				level.playLocalSound(d, e, f, SoundEvents.LAVA_POP, SoundSource.AMBIENT, 0.2F + random.nextFloat() * 0.2F, 0.9F + random.nextFloat() * 0.15F, false);
			}

			if (random.nextInt(200) == 0) {
				level.playLocalSound(
					pos.getX(),
					pos.getY(),
					pos.getZ(),
					SoundEvents.LAVA_AMBIENT,
					SoundSource.AMBIENT,
					0.2F + random.nextFloat() * 0.2F,
					0.9F + random.nextFloat() * 0.15F,
					false
				);
			}
		}
	}

	@Override
	public void randomTick(ServerLevel level, BlockPos pos, FluidState state, RandomSource random) {
		if (level.getGameRules().getBoolean(GameRules.RULE_DOFIRETICK)) {
			if (level.getGameRules().getBoolean(GameRules.RULE_ALLOWFIRETICKAWAYFROMPLAYERS) || level.anyPlayerCloseEnoughForSpawning(pos)) {
				int i = random.nextInt(3);
				if (i > 0) {
					BlockPos blockPos = pos;

					for (int j = 0; j < i; j++) {
						blockPos = blockPos.offset(random.nextInt(3) - 1, 1, random.nextInt(3) - 1);
						if (!level.isLoaded(blockPos)) {
							return;
						}

						BlockState blockState = level.getBlockState(blockPos);
						if (blockState.isAir()) {
							if (this.hasFlammableNeighbours(level, blockPos)) {
								level.setBlockAndUpdate(blockPos, BaseFireBlock.getState(level, blockPos));
								return;
							}
						} else if (blockState.blocksMotion()) {
							return;
						}
					}
				} else {
					for (int k = 0; k < 3; k++) {
						BlockPos blockPos2 = pos.offset(random.nextInt(3) - 1, 0, random.nextInt(3) - 1);
						if (!level.isLoaded(blockPos2)) {
							return;
						}

						if (level.isEmptyBlock(blockPos2.above()) && this.isFlammable(level, blockPos2)) {
							level.setBlockAndUpdate(blockPos2.above(), BaseFireBlock.getState(level, blockPos2));
						}
					}
				}
			}
		}
	}

	@Override
	protected void entityInside(Level level, BlockPos pos, Entity entity, InsideBlockEffectApplier effectApplier) {
		effectApplier.apply(InsideBlockEffectType.LAVA_IGNITE);
		effectApplier.runAfter(InsideBlockEffectType.LAVA_IGNITE, Entity::lavaHurt);
	}

	private boolean hasFlammableNeighbours(LevelReader level, BlockPos pos) {
		for (Direction direction : Direction.values()) {
			if (this.isFlammable(level, pos.relative(direction))) {
				return true;
			}
		}

		return false;
	}

	private boolean isFlammable(LevelReader level, BlockPos pos) {
		return level.isInsideBuildHeight(pos.getY()) && !level.hasChunkAt(pos) ? false : level.getBlockState(pos).ignitedByLava();
	}

	@Nullable
	@Override
	public ParticleOptions getDripParticle() {
		return ParticleTypes.DRIPPING_LAVA;
	}

	@Override
	protected void beforeDestroyingBlock(LevelAccessor level, BlockPos pos, BlockState state) {
		this.fizz(level, pos);
	}

	@Override
	public int getSlopeFindDistance(LevelReader level) {
		return level.dimensionType().ultraWarm() ? 4 : 2;
	}

	@Override
	public BlockState createLegacyBlock(FluidState state) {
		return Blocks.LAVA.defaultBlockState().setValue(LiquidBlock.LEVEL, getLegacyLevel(state));
	}

	@Override
	public boolean isSame(Fluid fluid) {
		return fluid == Fluids.LAVA || fluid == Fluids.FLOWING_LAVA;
	}

	@Override
	public int getDropOff(LevelReader level) {
		return level.dimensionType().ultraWarm() ? 1 : 2;
	}

	@Override
	public boolean canBeReplacedWith(FluidState state, BlockGetter level, BlockPos pos, Fluid fluid, Direction direction) {
		return state.getHeight(level, pos) >= 0.44444445F && fluid.is(FluidTags.WATER);
	}

	@Override
	public int getTickDelay(LevelReader level) {
		return level.dimensionType().ultraWarm() ? 10 : 30;
	}

	@Override
	public int getSpreadDelay(Level level, BlockPos pos, FluidState currentState, FluidState newState) {
		int i = this.getTickDelay(level);
		if (!currentState.isEmpty()
			&& !newState.isEmpty()
			&& !(Boolean)currentState.getValue(FALLING)
			&& !(Boolean)newState.getValue(FALLING)
			&& newState.getHeight(level, pos) > currentState.getHeight(level, pos)
			&& level.getRandom().nextInt(4) != 0) {
			i *= 4;
		}

		return i;
	}

	private void fizz(LevelAccessor level, BlockPos pos) {
		level.levelEvent(1501, pos, 0);
	}

	@Override
	protected boolean canConvertToSource(ServerLevel level) {
		return level.getGameRules().getBoolean(GameRules.RULE_LAVA_SOURCE_CONVERSION);
	}

	@Override
	protected void spreadTo(LevelAccessor level, BlockPos pos, BlockState blockState, Direction direction, FluidState fluidState) {
		if (direction == Direction.DOWN) {
			FluidState fluidState2 = level.getFluidState(pos);
			if (this.is(FluidTags.LAVA) && fluidState2.is(FluidTags.WATER)) {
				if (blockState.getBlock() instanceof LiquidBlock) {
					level.setBlock(pos, Blocks.STONE.defaultBlockState(), 3);
				}

				this.fizz(level, pos);
				return;
			}
		}

		super.spreadTo(level, pos, blockState, direction, fluidState);
	}

	@Override
	protected boolean isRandomlyTicking() {
		return true;
	}

	@Override
	protected float getExplosionResistance() {
		return 100.0F;
	}

	@Override
	public Optional<SoundEvent> getPickupSound() {
		return Optional.of(SoundEvents.BUCKET_FILL_LAVA);
	}

	public static class Flowing extends LavaFluid {
		@Override
		protected void createFluidStateDefinition(Builder<Fluid, FluidState> builder) {
			super.createFluidStateDefinition(builder);
			builder.add(LEVEL);
		}

		@Override
		public int getAmount(FluidState state) {
			return (Integer)state.getValue(LEVEL);
		}

		@Override
		public boolean isSource(FluidState state) {
			return false;
		}
	}

	public static class Source extends LavaFluid {
		@Override
		public int getAmount(FluidState state) {
			return 8;
		}

		@Override
		public boolean isSource(FluidState state) {
			return true;
		}
	}
}