minecraft-src/net/minecraft/world/level/block/CactusBlock.java

package net.minecraft.world.level.block;

import com.mojang.serialization.MapCodec;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.tags.BlockTags;
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.level.BlockGetter;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.LevelReader;
import net.minecraft.world.level.ScheduledTickAccess;
import net.minecraft.world.level.block.state.BlockBehaviour;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.block.state.StateDefinition;
import net.minecraft.world.level.block.state.properties.BlockStateProperties;
import net.minecraft.world.level.block.state.properties.IntegerProperty;
import net.minecraft.world.level.pathfinder.PathComputationType;
import net.minecraft.world.phys.shapes.CollisionContext;
import net.minecraft.world.phys.shapes.VoxelShape;

public class CactusBlock extends Block {
	public static final MapCodec<CactusBlock> CODEC = simpleCodec(CactusBlock::new);
	public static final IntegerProperty AGE = BlockStateProperties.AGE_15;
	public static final int MAX_AGE = 15;
	private static final VoxelShape SHAPE = Block.column(14.0, 0.0, 16.0);
	private static final VoxelShape SHAPE_COLLISION = Block.column(14.0, 0.0, 15.0);
	private static final int MAX_CACTUS_GROWING_HEIGHT = 3;
	private static final int ATTEMPT_GROW_CACTUS_FLOWER_AGE = 8;
	private static final double ATTEMPT_GROW_CACTUS_FLOWER_SMALL_CACTUS_CHANCE = 0.1;
	private static final double ATTEMPT_GROW_CACTUS_FLOWER_TALL_CACTUS_CHANCE = 0.25;

	@Override
	public MapCodec<CactusBlock> codec() {
		return CODEC;
	}

	protected CactusBlock(BlockBehaviour.Properties properties) {
		super(properties);
		this.registerDefaultState(this.stateDefinition.any().setValue(AGE, 0));
	}

	@Override
	protected void tick(BlockState state, ServerLevel level, BlockPos pos, RandomSource random) {
		if (!state.canSurvive(level, pos)) {
			level.destroyBlock(pos, true);
		}
	}

	@Override
	protected void randomTick(BlockState state, ServerLevel level, BlockPos pos, RandomSource random) {
		BlockPos blockPos = pos.above();
		if (level.isEmptyBlock(blockPos)) {
			int i = 1;
			int j = (Integer)state.getValue(AGE);

			while (level.getBlockState(pos.below(i)).is(this)) {
				if (++i == 3 && j == 15) {
					return;
				}
			}

			if (j == 8 && this.canSurvive(this.defaultBlockState(), level, pos.above())) {
				double d = i >= 3 ? 0.25 : 0.1;
				if (random.nextDouble() <= d) {
					level.setBlockAndUpdate(blockPos, Blocks.CACTUS_FLOWER.defaultBlockState());
				}
			} else if (j == 15 && i < 3) {
				level.setBlockAndUpdate(blockPos, this.defaultBlockState());
				BlockState blockState = state.setValue(AGE, 0);
				level.setBlock(pos, blockState, 260);
				level.neighborChanged(blockState, blockPos, this, null, false);
			}

			if (j < 15) {
				level.setBlock(pos, state.setValue(AGE, j + 1), 260);
			}
		}
	}

	@Override
	protected VoxelShape getCollisionShape(BlockState state, BlockGetter level, BlockPos pos, CollisionContext context) {
		return SHAPE_COLLISION;
	}

	@Override
	protected VoxelShape getShape(BlockState state, BlockGetter level, BlockPos pos, CollisionContext context) {
		return SHAPE;
	}

	@Override
	protected BlockState updateShape(
		BlockState state,
		LevelReader level,
		ScheduledTickAccess scheduledTickAccess,
		BlockPos pos,
		Direction direction,
		BlockPos neighborPos,
		BlockState neighborState,
		RandomSource random
	) {
		if (!state.canSurvive(level, pos)) {
			scheduledTickAccess.scheduleTick(pos, this, 1);
		}

		return super.updateShape(state, level, scheduledTickAccess, pos, direction, neighborPos, neighborState, random);
	}

	@Override
	protected boolean canSurvive(BlockState state, LevelReader level, BlockPos pos) {
		for (Direction direction : Direction.Plane.HORIZONTAL) {
			BlockState blockState = level.getBlockState(pos.relative(direction));
			if (blockState.isSolid() || level.getFluidState(pos.relative(direction)).is(FluidTags.LAVA)) {
				return false;
			}
		}

		BlockState blockState2 = level.getBlockState(pos.below());
		return (blockState2.is(Blocks.CACTUS) || blockState2.is(BlockTags.SAND)) && !level.getBlockState(pos.above()).liquid();
	}

	@Override
	protected void entityInside(BlockState state, Level level, BlockPos pos, Entity entity, InsideBlockEffectApplier effectApplier) {
		entity.hurt(level.damageSources().cactus(), 1.0F);
	}

	@Override
	protected void createBlockStateDefinition(StateDefinition.Builder<Block, BlockState> builder) {
		builder.add(AGE);
	}

	@Override
	protected boolean isPathfindable(BlockState state, PathComputationType pathComputationType) {
		return false;
	}
}