Code/net/minecraft/world/level/block/RepeaterBlock.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.core.particles.DustParticleOptions;
import net.minecraft.util.RandomSource;
import net.minecraft.world.InteractionResult;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.item.context.BlockPlaceContext;
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.BooleanProperty;
import net.minecraft.world.level.block.state.properties.IntegerProperty;
import net.minecraft.world.phys.BlockHitResult;

public class RepeaterBlock extends DiodeBlock {
    public static final MapCodec<RepeaterBlock> CODEC = simpleCodec(RepeaterBlock::new);
    public static final BooleanProperty LOCKED = BlockStateProperties.LOCKED;
    public static final IntegerProperty DELAY = BlockStateProperties.DELAY;

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

    protected RepeaterBlock(BlockBehaviour.Properties p_55801_) {
        super(p_55801_);
        this.registerDefaultState(this.stateDefinition.any().setValue(FACING, Direction.NORTH).setValue(DELAY, 1).setValue(LOCKED, false).setValue(POWERED, false));
    }

    @Override
    protected InteractionResult useWithoutItem(BlockState p_55809_, Level p_55810_, BlockPos p_55811_, Player p_55812_, BlockHitResult p_55814_) {
        if (!p_55812_.getAbilities().mayBuild) {
            return InteractionResult.PASS;
        } else {
            p_55810_.setBlock(p_55811_, p_55809_.cycle(DELAY), 3);
            return InteractionResult.SUCCESS;
        }
    }

    @Override
    protected int getDelay(BlockState p_55830_) {
        return p_55830_.getValue(DELAY) * 2;
    }

    @Override
    public BlockState getStateForPlacement(BlockPlaceContext p_55803_) {
        BlockState blockstate = super.getStateForPlacement(p_55803_);
        return blockstate.setValue(LOCKED, this.isLocked(p_55803_.getLevel(), p_55803_.getClickedPos(), blockstate));
    }

    @Override
    protected BlockState updateShape(
        BlockState p_55821_,
        LevelReader p_365910_,
        ScheduledTickAccess p_369041_,
        BlockPos p_55825_,
        Direction p_55822_,
        BlockPos p_55826_,
        BlockState p_55823_,
        RandomSource p_370128_
    ) {
        if (p_55822_ == Direction.DOWN && !this.canSurviveOn(p_365910_, p_55826_, p_55823_)) {
            return Blocks.AIR.defaultBlockState();
        } else {
            return !p_365910_.isClientSide() && p_55822_.getAxis() != p_55821_.getValue(FACING).getAxis()
                ? p_55821_.setValue(LOCKED, this.isLocked(p_365910_, p_55825_, p_55821_))
                : super.updateShape(p_55821_, p_365910_, p_369041_, p_55825_, p_55822_, p_55826_, p_55823_, p_370128_);
        }
    }

    @Override
    public boolean isLocked(LevelReader p_55805_, BlockPos p_55806_, BlockState p_55807_) {
        return this.getAlternateSignal(p_55805_, p_55806_, p_55807_) > 0;
    }

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

    @Override
    public void animateTick(BlockState p_221964_, Level p_221965_, BlockPos p_221966_, RandomSource p_221967_) {
        if (p_221964_.getValue(POWERED)) {
            Direction direction = p_221964_.getValue(FACING);
            double d0 = p_221966_.getX() + 0.5 + (p_221967_.nextDouble() - 0.5) * 0.2;
            double d1 = p_221966_.getY() + 0.4 + (p_221967_.nextDouble() - 0.5) * 0.2;
            double d2 = p_221966_.getZ() + 0.5 + (p_221967_.nextDouble() - 0.5) * 0.2;
            float f = -5.0F;
            if (p_221967_.nextBoolean()) {
                f = p_221964_.getValue(DELAY) * 2 - 1;
            }

            f /= 16.0F;
            double d3 = f * direction.getStepX();
            double d4 = f * direction.getStepZ();
            p_221965_.addParticle(DustParticleOptions.REDSTONE, d0 + d3, d1, d2 + d4, 0.0, 0.0, 0.0);
        }
    }

    @Override
    protected void createBlockStateDefinition(StateDefinition.Builder<Block, BlockState> p_55828_) {
        p_55828_.add(FACING, DELAY, LOCKED, POWERED);
    }
}