BallastBlock.kt

package org.valkyrienskies.eureka.block

import net.minecraft.core.BlockPos
import net.minecraft.server.level.ServerLevel
import net.minecraft.world.level.Level
import net.minecraft.world.level.block.Block
import net.minecraft.world.level.block.SoundType
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.POWER
import net.minecraft.world.level.material.Material

class BallastBlock : Block(
    Properties.of(Material.STONE)
        .sound(SoundType.STONE).strength(1.0f, 2.0f)
) {

    init {
        registerDefaultState(defaultBlockState().setValue(POWER, 0))
    }

    override fun createBlockStateDefinition(builder: StateDefinition.Builder<Block, BlockState>) {
        super.createBlockStateDefinition(builder)
        builder.add(POWER)
    }

    override fun neighborChanged(
        state: BlockState,
        level: Level,
        pos: BlockPos,
        block: Block,
        fromPos: BlockPos,
        isMoving: Boolean
    ) {
        super.neighborChanged(state, level, pos, block, fromPos, isMoving)

        if (level as? ServerLevel == null) return

        val signal = level.getBestNeighborSignal(pos)
        level.setBlock(pos, state.setValue(POWER, signal), 2)
    }
}