Code/net/minecraft/world/level/block/FrostedIceBlock.java

package net.minecraft.world.level.block;

import com.mojang.serialization.MapCodec;
import javax.annotation.Nullable;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.util.Mth;
import net.minecraft.util.RandomSource;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.level.BlockGetter;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.LevelReader;
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.redstone.Orientation;

public class FrostedIceBlock extends IceBlock {
    public static final MapCodec<FrostedIceBlock> CODEC = simpleCodec(FrostedIceBlock::new);
    public static final int MAX_AGE = 3;
    public static final IntegerProperty AGE = BlockStateProperties.AGE_3;
    private static final int NEIGHBORS_TO_AGE = 4;
    private static final int NEIGHBORS_TO_MELT = 2;

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

    public FrostedIceBlock(BlockBehaviour.Properties p_53564_) {
        super(p_53564_);
        this.registerDefaultState(this.stateDefinition.any().setValue(AGE, 0));
    }

    @Override
    public void onPlace(BlockState p_342717_, Level p_343709_, BlockPos p_344929_, BlockState p_344499_, boolean p_344789_) {
        p_343709_.scheduleTick(p_344929_, this, Mth.nextInt(p_343709_.getRandom(), 60, 120));
    }

    @Override
    protected void tick(BlockState p_221233_, ServerLevel p_221234_, BlockPos p_221235_, RandomSource p_221236_) {
        if ((p_221236_.nextInt(3) == 0 || this.fewerNeigboursThan(p_221234_, p_221235_, 4))
            && p_221234_.getMaxLocalRawBrightness(p_221235_) > 11 - p_221233_.getValue(AGE) - p_221233_.getLightBlock()
            && this.slightlyMelt(p_221233_, p_221234_, p_221235_)) {
            BlockPos.MutableBlockPos blockpos$mutableblockpos = new BlockPos.MutableBlockPos();

            for (Direction direction : Direction.values()) {
                blockpos$mutableblockpos.setWithOffset(p_221235_, direction);
                BlockState blockstate = p_221234_.getBlockState(blockpos$mutableblockpos);
                if (blockstate.is(this) && !this.slightlyMelt(blockstate, p_221234_, blockpos$mutableblockpos)) {
                    p_221234_.scheduleTick(blockpos$mutableblockpos, this, Mth.nextInt(p_221236_, 20, 40));
                }
            }
        } else {
            p_221234_.scheduleTick(p_221235_, this, Mth.nextInt(p_221236_, 20, 40));
        }
    }

    private boolean slightlyMelt(BlockState p_53593_, Level p_53594_, BlockPos p_53595_) {
        int i = p_53593_.getValue(AGE);
        if (i < 3) {
            p_53594_.setBlock(p_53595_, p_53593_.setValue(AGE, i + 1), 2);
            return false;
        } else {
            this.melt(p_53593_, p_53594_, p_53595_);
            return true;
        }
    }

    @Override
    protected void neighborChanged(BlockState p_53579_, Level p_53580_, BlockPos p_53581_, Block p_53582_, @Nullable Orientation p_368711_, boolean p_53584_) {
        if (p_53582_.defaultBlockState().is(this) && this.fewerNeigboursThan(p_53580_, p_53581_, 2)) {
            this.melt(p_53579_, p_53580_, p_53581_);
        }

        super.neighborChanged(p_53579_, p_53580_, p_53581_, p_53582_, p_368711_, p_53584_);
    }

    private boolean fewerNeigboursThan(BlockGetter p_53566_, BlockPos p_53567_, int p_53568_) {
        int i = 0;
        BlockPos.MutableBlockPos blockpos$mutableblockpos = new BlockPos.MutableBlockPos();

        for (Direction direction : Direction.values()) {
            blockpos$mutableblockpos.setWithOffset(p_53567_, direction);
            if (p_53566_.getBlockState(blockpos$mutableblockpos).is(this)) {
                if (++i >= p_53568_) {
                    return false;
                }
            }
        }

        return true;
    }

    @Override
    protected void createBlockStateDefinition(StateDefinition.Builder<Block, BlockState> p_53586_) {
        p_53586_.add(AGE);
    }

    @Override
    protected ItemStack getCloneItemStack(LevelReader p_310839_, BlockPos p_53571_, BlockState p_53572_, boolean p_376558_) {
        return ItemStack.EMPTY;
    }
}