Black holes now break blocks in range

src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/blackhole/BlockEntityBlackHole.kt

@@ -20,11 +20,13 @@ import net.minecraft.world.level.levelgen.structure.BoundingBox
 import net.minecraft.world.phys.AABB
 import net.minecraft.world.phys.Vec3
 import ru.dbotthepony.mc.otm.Registry
+import ru.dbotthepony.mc.otm.block.BlockBlackHole
 import ru.dbotthepony.mc.otm.block.entity.blackhole.ExplosionQueue.Companion.queueForLevel
 import ru.dbotthepony.mc.otm.core.*
 import ru.dbotthepony.mc.otm.matter.MatterRegistry
 import ru.dbotthepony.mc.otm.set
 import kotlin.math.pow
+import kotlin.math.roundToInt
 import kotlin.math.sqrt
 
 class BlockEntityBlackHole(p_155229_: BlockPos, p_155230_: BlockState) : BlockEntity(Registry.BlockEntities.BLACK_HOLE, p_155229_, p_155230_) {
@@ -245,14 +247,111 @@ class BlockEntityBlackHole(p_155229_: BlockPos, p_155230_: BlockState) : BlockEn
 		if (level.random.nextDouble() < 0.01 * 0.05 * (1 / gravitationStrength)) {
 			this.mass += HAWKING_MASS_LOSE_STEP
 		}
+
+		if (gravitationStrength > 0.4f) {
+			val sphere = getSphericalShape((gravitationStrength * 6.0).roundToInt())
+
+			if (sphere.size != lastSphereSizeOuter) {
+				lastSphereSizeOuter = sphere.size
+				sphereIndexOuter = 0
+			}
+
+			var iterations = 0
+
+			while (iterations < ITERATIONS) {
+				iterations++
+
+				val pos = sphere[sphereIndexOuter] + blockPos
+				sphereIndexOuter = (sphereIndexOuter + 1) % lastSphereSizeOuter
+
+				if (sphereIndexOuter == 0 && lastSphereSizeOuter <= ITERATIONS)
+					break
+
+				val getBlock = level.getBlockState(pos)
+
+				if (!getBlock.isAir && getBlock.block !is BlockBlackHole) {
+					val speed = getBlock.getDestroySpeed(level, pos)
+
+					val eResist = try {
+						getBlock.getExplosionResistance(level, pos, null)
+					} catch (err: Throwable) {
+						getBlock.block.getExplosionResistance()
+						// Потому что возможно какой-либо мод не ожидает что Explosion == null
+						// особенно учитывая что интерфейс IForgeBlock не имеет @ParamsAreNonnullByDefault
+						// и аргумент не помечен как @Nullable
+						// тем самым имеет тип Explosion! который указывается как Explosion? .. Explosion!!
+					}
+
+					var strengthLinear = sqrt(blockPos.distSqr(pos))
+
+					if (strengthLinear < gravitationStrength * 1.1) {
+						strengthLinear /= 4.0
+					}
+
+					if (speed >= 0f && (speed * 2f).coerceAtLeast(eResist / 3f) < gravitationStrength * (8.0 / strengthLinear)) {
+						Block.dropResources(getBlock, level, pos, level.getBlockEntity(pos))
+						getBlock.block.destroy(level, pos, getBlock)
+						level.setBlock(pos, getBlock.fluidState.createLegacyBlock(), Block.UPDATE_ALL)
+					}
+				}
+			}
+		}
 	}
 
+	private var lastSphereSizeOuter = 0
+	private var sphereIndexOuter = 0
+
 	init {
 		mass = mass
 	}
 
 	companion object {
+		const val ITERATIONS = 30_000
 		val BASELINE_MASS = Fraction(1_000)
 		val HAWKING_MASS_LOSE_STEP = Fraction("-0.1")
+
+		private val blockShapeCache = HashMap<Int, Array<BlockPos>>()
+
+		private fun getSphericalShape(size: Int): Array<BlockPos> {
+			return blockShapeCache.computeIfAbsent(size) {
+				val result = ArrayList<BlockPos>((it * it * it * Math.PI * (4.0 / 3.0)).toInt() + 16)
+
+				for (x in -it .. it) {
+					for (y in -it .. it) {
+						for (z in -it .. it) {
+							val dist = sqrt(x * x.toDouble() + y * y.toDouble() + z * z.toDouble())
+
+							if (dist <= size && dist != 0.0) {
+								result.add(BlockPos(x, y, z))
+							}
+						}
+					}
+				}
+
+				val arr = result.toTypedArray()
+
+				arr.sortWith { a, b ->
+					val xa = a.x
+					val ya = a.y
+					val za = a.z
+					val distA = sqrt(xa * xa.toDouble() + ya * ya.toDouble() + za * za.toDouble())
+
+					val xb = b.x
+					val yb = b.y
+					val zb = b.z
+					val distB = sqrt(xb * xb.toDouble() + yb * yb.toDouble() + zb * zb.toDouble())
+
+					if (distA == distB) {
+						return@sortWith 0
+					} else if (distA > distB) {
+						return@sortWith 1
+					} else {
+						return@sortWith -1
+					}
+				}
+
+				return@computeIfAbsent arr
+			}
+		}
 	}
 }