Work on RegionTraverser (wasted a lotta time but we'll get there)

10 files changed, 406 insertions, 115 deletions

diff --git a/build.gradle.kts b/build.gradle.kts
index 7fb3ede..06f2041 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -17,8 +17,11 @@ plugins {
     id("com.github.johnrengelman.plugin-shadow") version "2.0.3"
 }
 
+
+
 allprojects {
     apply<JavaPlugin>()
+    apply(plugin = "idea")
 
     repositories {
         mavenCentral()
@@ -68,7 +71,7 @@ dependencies {
 
     // not on sk89q maven repo yet
     compileClasspath(files("$rootDir/debug/plugins/worldedit-bukkit-7.0.0-beta-01.jar"))
-    compileClasspath(files("$rootDir/debug/lib/spigot-1.13.1.jar"))
+    //compileClasspath(files("$rootDir/debug/lib/spigot-1.13.1.jar"))
 
     compile("org.jetbrains.exposed:exposed:0.10.5") { isTransitive = false }
     compile("joda-time:joda-time:2.10")
@@ -91,7 +94,7 @@ tasks {
             javaParameters = true
             suppressWarnings = true
             jvmTarget = "1.8"
-            //freeCompilerArgs = listOf("-XXLanguage:+InlineClasses", "-Xuse-experimental=kotlin.Experimental")
+            freeCompilerArgs = listOf("-XXLanguage:+InlineClasses", "-Xuse-experimental=kotlin.Experimental")
         }
     }
 
diff --git a/src/main/kotlin/io/dico/parcels2/blockvisitor/Attachables.kt b/src/main/kotlin/io/dico/parcels2/blockvisitor/Attachables.kt
index 9403f34..84d8a58 100644
--- a/src/main/kotlin/io/dico/parcels2/blockvisitor/Attachables.kt
+++ b/src/main/kotlin/io/dico/parcels2/blockvisitor/Attachables.kt
@@ -1,67 +1,61 @@
 package io.dico.parcels2.blockvisitor
 
+import io.dico.parcels2.util.Vec3i
+import io.dico.parcels2.util.ext.getMaterialsWithWoodTypePrefix
+import io.dico.parcels2.util.ext.getMaterialsWithWoolColorPrefix
 import org.bukkit.Material
 import org.bukkit.Material.*
+import org.bukkit.block.BlockFace
+import org.bukkit.block.data.BlockData
+import org.bukkit.block.data.Directional
 import java.util.EnumSet
 
-val attachables: Set<Material> = EnumSet.of(
-    ACACIA_DOOR,
-    ACTIVATOR_RAIL,
-    BIRCH_DOOR,
-    BROWN_MUSHROOM,
-    CACTUS,
-    CAKE,
-    WHITE_CARPET, ORANGE_CARPET, MAGENTA_CARPET, LIGHT_BLUE_CARPET, YELLOW_CARPET, LIME_CARPET, PINK_CARPET, GRAY_CARPET, LIGHT_GRAY_CARPET, CYAN_CARPET, PURPLE_CARPET, BLUE_CARPET, BROWN_CARPET, GREEN_CARPET, RED_CARPET, BLACK_CARPET,
-    CARROT,
-    COCOA,
-    WHEAT,
-    DARK_OAK_DOOR,
-    DEAD_BUSH,
-    DETECTOR_RAIL,
-    REPEATER,
-    TALL_GRASS, TALL_SEAGRASS,
-    DRAGON_EGG,
-    FIRE,
-    FLOWER_POT,
-    OAK_PRESSURE_PLATE, BIRCH_PRESSURE_PLATE, SPRUCE_PRESSURE_PLATE, JUNGLE_PRESSURE_PLATE, ACACIA_PRESSURE_PLATE, DARK_OAK_PRESSURE_PLATE,
+private val attachables = EnumSet.of(
+    REPEATER, COMPARATOR,
+    *getMaterialsWithWoodTypePrefix("PRESSURE_PLATE"),
     STONE_PRESSURE_PLATE, LIGHT_WEIGHTED_PRESSURE_PLATE, HEAVY_WEIGHTED_PRESSURE_PLATE,
-    IRON_DOOR,
-    OAK_DOOR, BIRCH_DOOR, SPRUCE_DOOR, JUNGLE_DOOR, ACACIA_DOOR, DARK_OAK_DOOR,
-    OAK_BUTTON, BIRCH_BUTTON, SPRUCE_BUTTON, JUNGLE_BUTTON, ACACIA_BUTTON, DARK_OAK_BUTTON,
-    STONE_BUTTON,
-    OAK_TRAPDOOR, BIRCH_TRAPDOOR, SPRUCE_TRAPDOOR, JUNGLE_TRAPDOOR, ACACIA_TRAPDOOR, DARK_OAK_TRAPDOOR,
-    IRON_TRAPDOOR,
+    *getMaterialsWithWoodTypePrefix("BUTTON"),
+    STONE_BUTTON, LEVER,
+    *getMaterialsWithWoodTypePrefix("DOOR"), IRON_DOOR,
+    ACTIVATOR_RAIL, POWERED_RAIL, DETECTOR_RAIL, RAIL,
+    PISTON, STICKY_PISTON,
+    REDSTONE_TORCH, REDSTONE_WALL_TORCH, REDSTONE_WIRE,
+    TRIPWIRE, TRIPWIRE_HOOK,
+
+    BROWN_MUSHROOM, RED_MUSHROOM, CACTUS, CARROT, COCOA,
+    WHEAT, DEAD_BUSH, CHORUS_FLOWER, DANDELION, SUGAR_CANE,
+    TALL_GRASS, TALL_SEAGRASS, NETHER_WART, MELON_STEM,
+    PUMPKIN_STEM, SUNFLOWER, POTATO, LILY_PAD, VINE,
+    *getMaterialsWithWoodTypePrefix("SAPLING"),
+
+    SAND, RED_SAND, DRAGON_EGG, ANVIL,
+    *getMaterialsWithWoolColorPrefix("CONCRETE_POWDER"),
+
+    *getMaterialsWithWoolColorPrefix("CARPET"),
+    CAKE, FIRE,
+    FLOWER_POT,
     LADDER,
-    LEVER,
-    MELON_STEM,
-    NETHER_WART,
-    PISTON,
-    STICKY_PISTON,
-    NETHER_PORTAL,
-    POTATO,
-    POWERED_RAIL,
-    PUMPKIN_STEM,
-    RAIL,
-    COMPARATOR,
-    REDSTONE_TORCH,
-    REDSTONE_WIRE,
-    RED_MUSHROOM,
-    SUNFLOWER,
+    // NETHER_PORTAL, fuck nether portals
     FLOWER_POT,
-    CHORUS_FLOWER,
-    OAK_SAPLING, BIRCH_SAPLING, SPRUCE_SAPLING, JUNGLE_SAPLING, ACACIA_SAPLING, DARK_OAK_SAPLING,
-    SIGN,
     SNOW,
-    SPRUCE_DOOR,
-    STONE_BUTTON,
-    SUGAR_CANE,
-    TORCH,
-    TRIPWIRE,
-    TRIPWIRE_HOOK,
-    VINE,
-    WHITE_BANNER, ORANGE_BANNER, MAGENTA_BANNER, LIGHT_BLUE_BANNER, YELLOW_BANNER, LIME_BANNER, PINK_BANNER, GRAY_BANNER, LIGHT_GRAY_BANNER, CYAN_BANNER, PURPLE_BANNER, BLUE_BANNER, BROWN_BANNER, GREEN_BANNER, RED_BANNER, BLACK_BANNER,
-    WHITE_WALL_BANNER, ORANGE_WALL_BANNER, MAGENTA_WALL_BANNER, LIGHT_BLUE_WALL_BANNER, YELLOW_WALL_BANNER, LIME_WALL_BANNER, PINK_WALL_BANNER, GRAY_WALL_BANNER, LIGHT_GRAY_WALL_BANNER, CYAN_WALL_BANNER, PURPLE_WALL_BANNER, BLUE_WALL_BANNER, BROWN_WALL_BANNER, GREEN_WALL_BANNER, RED_WALL_BANNER, BLACK_WALL_BANNER,
-    WALL_SIGN,
-    LILY_PAD,
-    DANDELION
-)
\ No newline at end of file
+    TORCH, WALL_TORCH,
+    *getMaterialsWithWoolColorPrefix("BANNER"),
+    *getMaterialsWithWoolColorPrefix("WALL_BANNER"),
+    SIGN, WALL_SIGN
+)
+
+fun isAttachable(type: Material) = attachables.contains(type)
+
+fun supportingBlock(data: BlockData): Vec3i = when (data) {
+    //is MultipleFacing -> // fuck it xD this is good enough
+
+    is Directional -> Vec3i.convert(when (data.material) {
+        // exceptions
+        COCOA -> data.facing
+        OAK_DOOR, BIRCH_DOOR, SPRUCE_DOOR, JUNGLE_DOOR, ACACIA_DOOR, DARK_OAK_DOOR, IRON_DOOR -> BlockFace.DOWN
+
+        else -> data.facing.oppositeFace
+    })
+
+    else -> Vec3i.down
+}
diff --git a/src/main/kotlin/io/dico/parcels2/blockvisitor/RegionTraverser.kt b/src/main/kotlin/io/dico/parcels2/blockvisitor/RegionTraverser.kt
index 3899db9..563d7a1 100644
--- a/src/main/kotlin/io/dico/parcels2/blockvisitor/RegionTraverser.kt
+++ b/src/main/kotlin/io/dico/parcels2/blockvisitor/RegionTraverser.kt
@@ -2,64 +2,291 @@ package io.dico.parcels2.blockvisitor
 
 import io.dico.parcels2.util.Region
 import io.dico.parcels2.util.Vec3i
+import io.dico.parcels2.util.ext.clampMax
 
-abstract class RegionTraverser {
-    fun traverseRegion(region: Region): Iterable<Vec3i> = Iterable { iterator<Vec3i> { build(region) } }
+private typealias Scope = SequenceScope<Vec3i>
 
-    protected abstract suspend fun SequenceScope<Vec3i>.build(region: Region)
+sealed class RegionTraverser {
+    fun traverseRegion(region: Region, worldHeight: Int = 256): Iterable<Vec3i> =
+        Iterable { iterator<Vec3i> { build(validify(region, worldHeight)) } }
 
-    companion object {
-        val upward = create { traverseUpward(it) }
-        val downward = create { traverseDownward(it) }
-        val forClearing get() = downward
-        val forFilling get() = upward
-
-        inline fun create(crossinline builder: suspend SequenceScope<Vec3i>.(Region) -> Unit) = object : RegionTraverser() {
-            override suspend fun SequenceScope<Vec3i>.build(region: Region) {
-                builder(region)
-            }
+    private fun validify(region: Region, worldHeight: Int): Region {
+        if (region.origin.y < 0) {
+            val origin = region.origin withY 0
+            val size = region.size.withY((region.size.y + region.origin.y).clampMax(worldHeight))
+            return Region(origin, size)
         }
 
-        private suspend fun SequenceScope<Vec3i>.traverseDownward(region: Region) {
-            val origin = region.origin
-            val size = region.size
-            repeat(size.y) { y ->
-                repeat(size.z) { z ->
-                    repeat(size.x) { x ->
-                        yield(origin.add(x, size.y - y - 1, z))
-                    }
-                }
-            }
+        if (region.origin.y + region.size.y > worldHeight) {
+            val size = region.size.withY(worldHeight - region.origin.y)
+            return Region(region.origin, size)
         }
 
-        private suspend fun SequenceScope<Vec3i>.traverseUpward(region: Region) {
-            val origin = region.origin
-            val size = region.size
-            repeat(size.y) { y ->
-                repeat(size.z) { z ->
-                    repeat(size.x) { x ->
-                        yield(origin.add(x, size.y - y - 1, z))
-                    }
-                }
-            }
+        return region
+    }
+
+    protected abstract suspend fun Scope.build(region: Region)
+
+    companion object {
+        val upward = Directional(TraverseDirection(1, 1, 1), TraverseOrder(Dimension.Y, Dimension.X))
+        val downward = Directional(TraverseDirection(1, -1, 1), TraverseOrder(Dimension.Y, Dimension.X))
+        val toClear get() = downward
+        val toFill get() = upward
+
+        fun convergingTo(y: Int) = Slicing(y, upward, downward, true)
+
+        fun separatingFrom(y: Int) = Slicing(y, downward, upward, false)
+    }
+
+    class Directional(
+        val direction: TraverseDirection,
+        val order: TraverseOrder
+    ) : RegionTraverser() {
+        override suspend fun Scope.build(region: Region) {
+            //traverserLogic(region, order, direction)
         }
 
+    }
+
+    class Slicing(
+        val bottomSectionMaxY: Int,
+        val bottomTraverser: RegionTraverser,
+        val topTraverser: RegionTraverser,
+        val bottomFirst: Boolean = true
+    ) : RegionTraverser() {
+
         private fun slice(region: Region, atY: Int): Pair<Region, Region?> {
             if (atY < region.size.y + 1) {
                 val first = Region(region.origin, region.size.withY(atY + 1))
-                val second = Region(region.origin.withY(atY), region.size.addY(-atY-1))
+                val second = Region(region.origin.withY(atY), region.size.addY(-atY - 1))
                 return first to second
             }
             return region to null
         }
 
-        fun upToAndDownUntil(y: Int) = create { region ->
-            val (bottom, top) = slice(region, y)
-            traverseUpward(bottom)
-            top?.let { traverseDownward(it) }
+        override suspend fun Scope.build(region: Region) {
+            val (bottom, top) = slice(region, bottomSectionMaxY)
+
+            if (bottomFirst) {
+                with(bottomTraverser) { build(bottom) }
+                top?.let { with(topTraverser) { build(it) } }
+            } else {
+                top?.let { with(topTraverser) { build(it) } }
+                with(bottomTraverser) { build(bottom) }
+            }
+        }
+    }
+
+}
+
+enum class Dimension {
+    X,
+    Y,
+    Z;
+
+    fun extract(block: Vec3i) =
+        when (this) {
+            X -> block.x
+            Y -> block.y
+            Z -> block.z
         }
 
+    companion object {
+        private val values = values()
+        operator fun get(ordinal: Int) = values[ordinal]
     }
+}
+
+inline class TraverseOrder(val orderNum: Int) {
+    private constructor(first: Dimension, swap: Boolean)
+        : this(if (swap) first.ordinal + 3 else first.ordinal)
+
+    @Suppress("NOTHING_TO_INLINE")
+    private inline fun element(index: Int) = Dimension[(orderNum + index) % 3]
+
+    private val swap inline get() = orderNum >= 3
+
+    /**
+     * The slowest changing dimension
+     */
+    val primary: Dimension get() = element(0)
+
+    /**
+     * Second slowest changing dimension
+     */
+    val secondary: Dimension get() = element(if (swap) 2 else 1)
+
+    /**
+     * Dimension that changes every block
+     */
+    val tertiary: Dimension get() = element(if (swap) 1 else 2)
+
+    /**
+     * All 3 dimensions in this order
+     */
+    fun toArray() = arrayOf(primary, secondary, tertiary)
 
+    companion object {
+        private fun isSwap(primary: Dimension, secondary: Dimension) = secondary.ordinal != (primary.ordinal + 1) % 3
+
+        operator fun invoke(primary: Dimension, secondary: Dimension): TraverseOrder {
+            // tertiary is implicit
+            if (primary == secondary) throw IllegalArgumentException()
+            return TraverseOrder(primary, isSwap(primary, secondary))
+        }
+    }
 
+    fun add(vec: Vec3i, dp: Int, ds: Int, dt: Int): Vec3i =
+        // optimize this, will be called lots
+        when (orderNum) {
+            0 -> vec.add(dp, ds, dt) // xyz
+            1 -> vec.add(dt, dp, ds) // yzx
+            2 -> vec.add(ds, dt, dp) // zxy
+            3 -> vec.add(dp, dt, ds) // xzy
+            4 -> vec.add(ds, dp, dt) // yxz
+            5 -> vec.add(dt, ds, dp) // zyx
+            else -> error("Invalid orderNum $orderNum")
+        }
 }
+
+class AltTraverser(val size: Vec3i,
+                   val order: TraverseOrder,
+                   val direction: TraverseDirection) {
+
+
+    suspend fun Scope.build() {
+        doPrimary()
+    }
+
+    private suspend fun Scope.doPrimary() {
+        val dimension = order.primary
+        direction.directionOf(dimension).traverse(dimension.extract(size)) { value ->
+
+        }
+    }
+
+    private fun Dimension.setValue(value: Int) {
+
+    }
+
+}
+
+enum class Increment(val offset: Int) {
+    UP(1),
+    DOWN(-1);
+
+    companion object {
+        fun convert(bool: Boolean) = if (bool) UP else DOWN
+    }
+
+    inline fun traverse(size: Int, op: (Int) -> Unit) {
+        when (this) {
+            UP -> repeat(size, op)
+            DOWN -> repeat(size) { op(size - it - 1) }
+        }
+    }
+
+}
+
+inline class TraverseDirection(val bits: Int) {
+
+    fun directionOf(dimension: Dimension) = Increment.convert((1 shl dimension.ordinal) and bits != 0)
+
+    companion object {
+        operator fun invoke(x: Int, y: Int, z: Int) = invoke(Vec3i(x, y, z))
+
+        operator fun invoke(block: Vec3i): TraverseDirection {
+            if (block.x == 0 || block.y == 0 || block.z == 0) throw IllegalArgumentException()
+            var bits = 0
+            if (block.x > 0) bits = bits or 1
+            if (block.y > 0) bits = bits or 2
+            if (block.z > 0) bits = bits or 3
+            return TraverseDirection(bits)
+        }
+    }
+
+}
+
+/*
+private typealias Scope = SequenceScope<Vec3i>
+private typealias ScopeAction = suspend Scope.(Int, Int, Int) -> Unit
+
+@Suppress("NON_EXHAUSTIVE_WHEN")
+suspend fun Scope.traverserLogic(
+    region: Region,
+    order: TraverseOrder,
+    direction: TraverseDirection
+) = with(direction) {
+    val (primary, secondary, tertiary) = order.toArray()
+    val (origin, size) = region
+
+    when (order.primary) {
+        Dimension.X ->
+            when (order.secondary) {
+                Dimension.Y -> {
+                    directionOf(primary).traverse(primary.extract(size)) { p ->
+                        directionOf(secondary).traverse(secondary.extract(size)) { s ->
+                            directionOf(tertiary).traverse(tertiary.extract(size)) { t ->
+                                yield(origin.add(p, s, t))
+                            }
+                        }
+                    }
+                }
+                Dimension.Z -> {
+                    directionOf(primary).traverse(primary.extract(size)) { p ->
+                        directionOf(secondary).traverse(secondary.extract(size)) { s ->
+                            directionOf(tertiary).traverse(tertiary.extract(size)) { t ->
+                                yield(origin.add(p, t, s))
+                            }
+                        }
+                    }
+                }
+            }
+
+        Dimension.Y ->
+            when (order.secondary) {
+                Dimension.X -> {
+                    directionOf(primary).traverse(primary.extract(size)) { p ->
+                        directionOf(secondary).traverse(secondary.extract(size)) { s ->
+                            directionOf(tertiary).traverse(tertiary.extract(size)) { t ->
+                                yield(origin.add(s, p, t))
+                            }
+                        }
+                    }
+                }
+                Dimension.Z -> {
+                    directionOf(primary).traverse(primary.extract(size)) { p ->
+                        directionOf(secondary).traverse(secondary.extract(size)) { s ->
+                            directionOf(tertiary).traverse(tertiary.extract(size)) { t ->
+                                yield(origin.add(t, p, s))
+                            }
+                        }
+                    }
+                }
+            }
+
+        Dimension.Z ->
+            when (order.secondary) {
+                Dimension.X -> {
+                    directionOf(primary).traverse(primary.extract(size)) { p ->
+                        directionOf(secondary).traverse(secondary.extract(size)) { s ->
+                            directionOf(tertiary).traverse(tertiary.extract(size)) { t ->
+                                yield(origin.add(s, t, p))
+                            }
+                        }
+                    }
+                }
+                Dimension.Y -> {
+                    directionOf(primary).traverse(primary.extract(size)) { p ->
+                        directionOf(secondary).traverse(secondary.extract(size)) { s ->
+                            directionOf(tertiary).traverse(tertiary.extract(size)) { t ->
+                                yield(origin.add(t, s, p))
+                            }
+                        }
+                    }
+                }
+            }
+    }
+}
+
+*/
\ No newline at end of file
diff --git a/src/main/kotlin/io/dico/parcels2/blockvisitor/Schematic.kt b/src/main/kotlin/io/dico/parcels2/blockvisitor/Schematic.kt
index 7e109c8..8d2084b 100644
--- a/src/main/kotlin/io/dico/parcels2/blockvisitor/Schematic.kt
+++ b/src/main/kotlin/io/dico/parcels2/blockvisitor/Schematic.kt
@@ -3,9 +3,13 @@ package io.dico.parcels2.blockvisitor
 import io.dico.parcels2.util.Region
 import io.dico.parcels2.util.Vec3i
 import io.dico.parcels2.util.get
+import org.bukkit.Bukkit
+import org.bukkit.Material
 import org.bukkit.World
 import org.bukkit.block.data.BlockData
 
+private val air = Bukkit.createBlockData(Material.AIR)
+
 // TODO order paste such that attachables are placed after the block they depend on
 class Schematic {
     val size: Vec3i get() = _size!!
@@ -15,15 +19,17 @@ class Schematic {
             field = value
         }
 
-    private var _data: Array<BlockData?>? = null
+    private var blockDatas: Array<BlockData?>? = null
     //private var extra: Map<Vec3i, (Block) -> Unit>? = null
     private var isLoaded = false; private set
+    private val traverser: RegionTraverser = RegionTraverser.upward
 
     fun getLoadTask(world: World, region: Region): TimeLimitedTask = {
-        val size = region.size.also { _size = it }
-        val data = arrayOfNulls<BlockData>(region.blockCount).also { _data = it }
+        _size = region.size
+
+        val data = arrayOfNulls<BlockData>(region.blockCount).also { blockDatas = it }
         //val extra = mutableMapOf<Vec3i, (Block) -> Unit>().also { extra = it }
-        val blocks = RegionTraverser.downward.traverseRegion(region)
+        val blocks = traverser.traverseRegion(region)
 
         for ((index, vec) in blocks.withIndex()) {
             markSuspensionPoint()
@@ -39,14 +45,26 @@ class Schematic {
     fun getPasteTask(world: World, position: Vec3i): TimeLimitedTask = {
         if (!isLoaded) throw IllegalStateException()
         val region = Region(position, _size!!)
-        val blocks = RegionTraverser.downward.traverseRegion(region)
-        val data = _data!!
+        val blocks = traverser.traverseRegion(region, worldHeight = world.maxHeight)
+        val blockDatas = blockDatas!!
+
+        val postponed = mutableListOf<Pair<Vec3i, BlockData>>()
 
         for ((index, vec) in blocks.withIndex()) {
             markSuspensionPoint()
             val block = world[vec]
-            if (block.y > 255) continue
-            data[index]?.let { block.blockData = it }
+            val type = blockDatas[index] ?: air
+            if (type !== air && isAttachable(type.material)) {
+
+
+                postponed += vec to type
+            } else {
+                block.blockData = type
+            }
+        }
+
+        for ((vec, data) in postponed) {
+
         }
     }
 
diff --git a/src/main/kotlin/io/dico/parcels2/command/CommandsDebug.kt b/src/main/kotlin/io/dico/parcels2/command/CommandsDebug.kt
index b646450..916fccd 100644
--- a/src/main/kotlin/io/dico/parcels2/command/CommandsDebug.kt
+++ b/src/main/kotlin/io/dico/parcels2/command/CommandsDebug.kt
@@ -10,6 +10,8 @@ import io.dico.parcels2.blockvisitor.RegionTraverser
 import io.dico.parcels2.doBlockOperation
 import org.bukkit.Bukkit
 import org.bukkit.Material
+import org.bukkit.block.BlockFace
+import org.bukkit.block.data.Directional
 import org.bukkit.entity.Player
 import java.util.Random
 
@@ -55,4 +57,19 @@ class CommandsDebug(plugin: ParcelsPlugin) : AbstractParcelCommands(plugin) {
         }
     }
 
+    @Cmd("directionality", aliases = ["dir"])
+    fun cmdDirectionality(sender: Player, context: ExecutionContext, material: Material): Any? {
+        val senderLoc = sender.location
+        val block = senderLoc.add(senderLoc.direction.setY(0).normalize().multiply(2).toLocation(sender.world)).block
+
+        val blockData = Bukkit.createBlockData(material)
+        if (blockData is Directional) {
+            blockData.facing = BlockFace.SOUTH
+        }
+
+        block.blockData = blockData
+        return if (blockData is Directional) "The block is facing south" else "The block is not directional, however it implements " +
+            blockData.javaClass.interfaces!!.contentToString()
+    }
+
 }
\ No newline at end of file
diff --git a/src/main/kotlin/io/dico/parcels2/defaultimpl/DefaultParcelGenerator.kt b/src/main/kotlin/io/dico/parcels2/defaultimpl/DefaultParcelGenerator.kt
index 84324f7..8c8f303 100644
--- a/src/main/kotlin/io/dico/parcels2/defaultimpl/DefaultParcelGenerator.kt
+++ b/src/main/kotlin/io/dico/parcels2/defaultimpl/DefaultParcelGenerator.kt
@@ -162,7 +162,7 @@ class DefaultParcelGenerator(
         override val worktimeLimiter: WorktimeLimiter
     ) : ParcelBlockManagerBase(), CoroutineScope by coroutineScope {
         override val world: World = this@DefaultParcelGenerator.world
-        override val parcelTraverser: RegionTraverser = RegionTraverser.upToAndDownUntil(o.floorHeight)
+        override val parcelTraverser: RegionTraverser = RegionTraverser.convergingTo(o.floorHeight)
 
         /*override*/ fun getBottomBlock(parcel: ParcelId): Vec2i = Vec2i(
             sectionSize * (parcel.x - 1) + pathOffset + o.offsetX,
diff --git a/src/main/kotlin/io/dico/parcels2/listener/ParcelEntityTracker.kt b/src/main/kotlin/io/dico/parcels2/listener/ParcelEntityTracker.kt
index 3785770..198e0e7 100644
--- a/src/main/kotlin/io/dico/parcels2/listener/ParcelEntityTracker.kt
+++ b/src/main/kotlin/io/dico/parcels2/listener/ParcelEntityTracker.kt
@@ -33,7 +33,7 @@ class ParcelEntityTracker(val parcelProvider: ParcelProvider) {
                 remove()
 
                 val newParcel = parcelProvider.getParcelAt(entity.location)
-                if (newParcel !== parcel && !(newParcel != null && newParcel.hasBlockVisitors)) {
+                if (newParcel !== parcel && (newParcel == null || !newParcel.hasBlockVisitors)) {
                     entity.remove()
                 }
 
@@ -41,14 +41,13 @@ class ParcelEntityTracker(val parcelProvider: ParcelProvider) {
             }
 
             val newParcel = parcelProvider.getParcelAt(entity.location)
-            if (newParcel !== parcel && !(newParcel != null && newParcel.hasBlockVisitors)) {
+            if (newParcel !== parcel && (newParcel == null || !newParcel.hasBlockVisitors)) {
                 remove()
                 entity.remove()
             }
         }
     }
 
-    @Suppress("RedundantLambdaArrow")
     fun swapParcels(parcel1: Parcel, parcel2: Parcel) {
         map.editLoop { ->
             if (value === parcel1) {
diff --git a/src/main/kotlin/io/dico/parcels2/listener/ParcelListeners.kt b/src/main/kotlin/io/dico/parcels2/listener/ParcelListeners.kt
index 9805f40..9d91cda 100644
--- a/src/main/kotlin/io/dico/parcels2/listener/ParcelListeners.kt
+++ b/src/main/kotlin/io/dico/parcels2/listener/ParcelListeners.kt
@@ -196,11 +196,10 @@ class ParcelListeners(
         when (event.action) {
             Action.RIGHT_CLICK_BLOCK -> run {
                 val type = clickedBlock.type
-                val interactable = Interactables.listedMaterials.containsKey(type)
-                    && (parcel.effectiveInteractableConfig.isInteractable(type) || (parcel != null && parcel.canBuild(user)))
-                if (!interactable) {
-                    val interactableClassName = Interactables[type]!!.name
-                    user.sendParcelMessage(nopermit = true, message = "You cannot interact with $interactableClassName in this parcel")
+
+                val interactableClass = Interactables[type]
+                if (interactableClass != null && (parcel.effectiveInteractableConfig.isInteractable(type) || (parcel != null && parcel.canBuild(user)))) {
+                    user.sendParcelMessage(nopermit = true, message = "You cannot interact with ${interactableClass.name} in this parcel")
                     event.isCancelled = true
                     return@l
                 }
diff --git a/src/main/kotlin/io/dico/parcels2/util/MainThreadDispatcher.kt b/src/main/kotlin/io/dico/parcels2/util/MainThreadDispatcher.kt
index b1d18ab..ce1bf0f 100644
--- a/src/main/kotlin/io/dico/parcels2/util/MainThreadDispatcher.kt
+++ b/src/main/kotlin/io/dico/parcels2/util/MainThreadDispatcher.kt
@@ -1,11 +1,14 @@
 package io.dico.parcels2.util
 
+import kotlinx.coroutines.CancellableContinuation
 import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.Delay
 import kotlinx.coroutines.Runnable
+import kotlinx.coroutines.timeunit.TimeUnit
 import org.bukkit.plugin.Plugin
 import kotlin.coroutines.CoroutineContext
 
-abstract class MainThreadDispatcher : CoroutineDispatcher() {
+abstract class MainThreadDispatcher : CoroutineDispatcher(), Delay {
     abstract val mainThread: Thread
     abstract fun runOnMainThread(task: Runnable)
 }
@@ -27,5 +30,14 @@ fun MainThreadDispatcher(plugin: Plugin): MainThreadDispatcher {
             if (Thread.currentThread() === mainThread) task.run()
             else plugin.server.scheduler.runTaskLater(plugin, task, 0)
         }
+
+        override fun scheduleResumeAfterDelay(time: Long, unit: TimeUnit, continuation: CancellableContinuation<Unit>) {
+            val task = Runnable {
+                with (continuation) { resumeUndispatched(Unit) }
+            }
+
+            val millis = TimeUnit.MILLISECONDS.convert(time, unit)
+            plugin.server.scheduler.runTaskLater(plugin, task, (millis + 25) / 50 - 1)
+        }
     }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/io/dico/parcels2/util/Vec3i.kt b/src/main/kotlin/io/dico/parcels2/util/Vec3i.kt
index ded1e0c..36a51c1 100644
--- a/src/main/kotlin/io/dico/parcels2/util/Vec3i.kt
+++ b/src/main/kotlin/io/dico/parcels2/util/Vec3i.kt
@@ -2,6 +2,7 @@ package io.dico.parcels2.util
 
 import org.bukkit.World
 import org.bukkit.block.Block
+import org.bukkit.block.BlockFace
 
 data class Vec3d(
     val x: Double,
@@ -32,6 +33,27 @@ data class Vec3i(
     infix fun withY(o: Int) = Vec3i(x, o, z)
     infix fun withZ(o: Int) = Vec3i(x, y, o)
     fun add(ox: Int, oy: Int, oz: Int) = Vec3i(x + ox, y + oy, z + oz)
+    fun neg() = Vec3i(-x, -y, -z)
+
+    companion object {
+        private operator fun invoke(face: BlockFace) = Vec3i(face.modX, face.modY, face.modZ)
+        val down = Vec3i(BlockFace.DOWN)
+        val up = Vec3i(BlockFace.UP)
+        val north = Vec3i(BlockFace.NORTH)
+        val east = Vec3i(BlockFace.EAST)
+        val south = Vec3i(BlockFace.SOUTH)
+        val west = Vec3i(BlockFace.WEST)
+
+        fun convert(face: BlockFace) = when (face) {
+            BlockFace.DOWN -> down
+            BlockFace.UP -> up
+            BlockFace.NORTH -> north
+            BlockFace.EAST -> east
+            BlockFace.SOUTH -> south
+            BlockFace.WEST -> west
+            else -> Vec3i(face)
+        }
+    }
 }
 
 @Suppress("NOTHING_TO_INLINE")