feat: projections

common/src/main/java/quaedam/mixin/MixinBuiltInRegistries.java

@@ -0,0 +1,19 @@
+package quaedam.mixin;
+
+import net.minecraft.core.registries.BuiltInRegistries;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+import quaedam.projection.ProjectionEffectType;
+
+@Mixin(BuiltInRegistries.class)
+public class MixinBuiltInRegistries {
+
+    @Inject(at = @At("HEAD"), method = "bootStrap()V")
+    private static void bootStrap(CallbackInfo info) {
+        // init projection effect type registry
+        ProjectionEffectType.Companion.getRegistry();
+    }
+
+}

common/src/main/kotlin/quaedam/Projector.kt

@@ -1,63 +0,0 @@
-package quaedam
-
-import net.minecraft.core.BlockPos
-import net.minecraft.server.level.ServerLevel
-import net.minecraft.util.RandomSource
-import net.minecraft.world.InteractionHand
-import net.minecraft.world.InteractionResult
-import net.minecraft.world.entity.player.Player
-import net.minecraft.world.item.BlockItem
-import net.minecraft.world.item.Item
-import net.minecraft.world.level.Level
-import net.minecraft.world.level.block.Block
-import net.minecraft.world.level.block.state.BlockState
-import net.minecraft.world.level.material.MapColor
-import net.minecraft.world.phys.BlockHitResult
-
-object Projector {
-
-    const val ID = "projector"
-
-    val block = Quaedam.blocks.register(ID) { ProjectorBlock }
-
-    val item = Quaedam.items.register(ID) {
-        BlockItem(
-            ProjectorBlock, Item.Properties()
-                .stacksTo(1)
-                .`arch$tab`(Quaedam.creativeModeTab)
-        )
-    }!!
-
-}
-
-object ProjectorBlock : Block(Properties.of()
-    .jumpFactor(0.8f)
-    .lightLevel { 3 }
-    .mapColor(MapColor.COLOR_BLACK)
-    .randomTicks()
-    .strength(4.0f)
-    .requiresCorrectToolForDrops()) {
-
-    @Suppress("OVERRIDE_DEPRECATION")
-    override fun use(
-        blockState: BlockState,
-        level: Level,
-        blockPos: BlockPos,
-        player: Player,
-        interactionHand: InteractionHand,
-        blockHitResult: BlockHitResult
-    ): InteractionResult {
-        return InteractionResult.SUCCESS
-    }
-
-    @Suppress("OVERRIDE_DEPRECATION")
-    override fun randomTick(
-        blockState: BlockState,
-        serverLevel: ServerLevel,
-        blockPos: BlockPos,
-        randomSource: RandomSource
-    ) {
-        // @TODO: call projectorRandomTick
-    }
-
-}

common/src/main/kotlin/quaedam/Quaedam.kt

@@ -6,10 +6,11 @@ import dev.architectury.registry.registries.RegistrySupplier
 import net.minecraft.core.registries.Registries
 import net.minecraft.network.chat.Component
 import net.minecraft.world.item.CreativeModeTab
-import net.minecraft.world.item.Item
 import net.minecraft.world.item.ItemStack
 import net.minecraft.world.item.Items
+import quaedam.projection.ProjectionEffectType
 import quaedam.projection.SkylightProjection
+import quaedam.projector.Projector
 
 object Quaedam {
 
@@ -18,6 +19,8 @@ object Quaedam {
     val creativeModeTabs = DeferredRegister.create(ID, Registries.CREATIVE_MODE_TAB)!!
     val items = DeferredRegister.create(ID, Registries.ITEM)!!
     val blocks = DeferredRegister.create(ID, Registries.BLOCK)!!
+    val blockEntities = DeferredRegister.create(ID, Registries.BLOCK_ENTITY_TYPE)!!
+    val projectionEffects = DeferredRegister.create(ID, ProjectionEffectType.registryKey)!!
 
     val creativeModeTab: RegistrySupplier<CreativeModeTab> = creativeModeTabs.register("quaedam") {
         CreativeTabRegistry.create(Component.translatable("category.quaedam")) {
@@ -28,9 +31,12 @@ object Quaedam {
     fun init() {
         Projector
         SkylightProjection
+
         creativeModeTabs.register()
         items.register()
         blocks.register()
+        blockEntities.register()
+        projectionEffects.register()
     }
 
 }

common/src/main/kotlin/quaedam/projection/ProjectionBlock.kt

@@ -1,15 +1,19 @@
 package quaedam.projection
 
 import net.minecraft.core.BlockPos
-import net.minecraft.server.level.ServerLevel
+import net.minecraft.world.entity.LivingEntity
-import net.minecraft.util.RandomSource
 import net.minecraft.world.item.ItemStack
+import net.minecraft.world.level.Level
+import net.minecraft.world.level.LevelAccessor
 import net.minecraft.world.level.block.Block
 import net.minecraft.world.level.block.state.BlockState
 import net.minecraft.world.level.material.MapColor
 import net.minecraft.world.level.storage.loot.LootParams
+import quaedam.projector.ProjectorBlockEntity
+import quaedam.utils.getChunksNearby
 
-abstract class ProjectionBlock(properties: Properties = createProperties()) : Block(properties) {
+abstract class ProjectionBlock<P : ProjectionEffect>(properties: Properties = createProperties()) : Block(properties),
+    ProjectionProvider<P> {
 
     companion object {
         fun createProperties(): Properties = Properties.of()
@@ -17,18 +21,39 @@ abstract class ProjectionBlock(properties: Properties = createProperties()) : Bl
             .requiresCorrectToolForDrops()
             .mapColor(MapColor.COLOR_GRAY)
 
+        fun findNearbyProjectors(level: Level, pos: BlockPos) = level.getChunksNearby(pos, 1)
+            .flatMap {
+                it.blockEntities.filter { (k, v) -> v is ProjectorBlockEntity }
+                    .keys
+                    .filterNotNull()
+            }
+            .toSet()
+
     }
 
     @Suppress("OVERRIDE_DEPRECATION")
     override fun getDrops(blockState: BlockState, builder: LootParams.Builder) = listOf(ItemStack(asItem()))
 
-    fun projectionActivated(level: ServerLevel, projectorPos: BlockPos, projectionPos: BlockPos) {
+    override fun setPlacedBy(
+        level: Level,
+        pos: BlockPos,
+        state: BlockState,
+        placer: LivingEntity?,
+        itemStack: ItemStack
+    ) {
+        super.setPlacedBy(level, pos, state, placer, itemStack)
+        if (!level.isClientSide) {
+            findNearbyProjectors(level, pos)
+                .forEach { (level.getBlockEntity(it) as ProjectorBlockEntity).checkUpdate() }
+        }
     }
 
-    fun projectionDeactivated(level: ServerLevel, projectorPos: BlockPos, projectionPos: BlockPos) {
+    override fun destroy(level: LevelAccessor, pos: BlockPos, state: BlockState) {
-    }
+        super.destroy(level, pos, state)
-
+        if (level is Level && !level.isClientSide) {
-    fun projectorRandomTick(level: ServerLevel, projectorPos: BlockPos, projectionPos: BlockPos, random: RandomSource) {
+            findNearbyProjectors(level, pos)
+                .forEach { (level.getBlockEntity(it) as ProjectorBlockEntity).checkUpdate() }
+        }
     }
 
 }

common/src/main/kotlin/quaedam/projection/ProjectionEffect.kt

@@ -0,0 +1,54 @@
+package quaedam.projection
+
+import net.minecraft.core.BlockPos
+import net.minecraft.core.Registry
+import net.minecraft.core.registries.BuiltInRegistries
+import net.minecraft.nbt.CompoundTag
+import net.minecraft.resources.ResourceKey
+import net.minecraft.resources.ResourceLocation
+import net.minecraft.server.level.ServerLevel
+import net.minecraft.util.RandomSource
+import net.minecraft.world.level.block.state.BlockState
+
+abstract class ProjectionEffect {
+
+    abstract val type: ProjectionEffectType<*>
+
+    abstract fun toNbt(tag: CompoundTag)
+
+    abstract fun fromNbt(tag: CompoundTag)
+
+    fun toNbt() = CompoundTag().apply { toNbt(this) }
+
+    override fun equals(other: Any?) = other === this
+
+    override fun hashCode() = type.hashCode()
+
+    fun activated(level: ServerLevel, projectorPos: BlockPos) {
+    }
+
+    fun deactivated(level: ServerLevel, projectorPos: BlockPos) {
+    }
+
+    fun randomTick(level: ServerLevel, projectorPos: BlockPos, random: RandomSource) {
+    }
+
+}
+
+data class ProjectionEffectType<T : ProjectionEffect>(val constructor: () -> T) {
+
+    companion object {
+
+        val registryKey: ResourceKey<Registry<ProjectionEffectType<*>>> =
+            ResourceKey.createRegistryKey(ResourceLocation("quaedam", "projection_effect"))
+        val registry: Registry<ProjectionEffectType<*>> = BuiltInRegistries.registerSimple(registryKey) { null }
+
+    }
+
+    val id by lazy { registry.getResourceKey(this).get().location()!! }
+
+}
+
+interface ProjectionProvider<P : ProjectionEffect> {
+    fun createProjectionEffect(level: ServerLevel, state: BlockState, pos: BlockPos): P?
+}

common/src/main/kotlin/quaedam/projection/SkylightProjection.kt

@@ -1,14 +1,18 @@
 package quaedam.projection
 
+import net.minecraft.core.BlockPos
+import net.minecraft.nbt.CompoundTag
+import net.minecraft.server.level.ServerLevel
 import net.minecraft.world.item.BlockItem
 import net.minecraft.world.item.Item
+import net.minecraft.world.level.block.state.BlockState
 import quaedam.Quaedam
 
 object SkylightProjection {
 
     const val ID = "skylight_projection"
 
-    val block = Quaedam.blocks.register(ID) { SkylightProjectionBlock }
+    val block = Quaedam.blocks.register(ID) { SkylightProjectionBlock }!!
 
     val item = Quaedam.items.register(ID) {
         BlockItem(
@@ -17,6 +21,31 @@ object SkylightProjection {
         )
     }!!
 
+    val effect = Quaedam.projectionEffects.register(ID) {
+        ProjectionEffectType { SkylightProjectionEffect }
+    }!!
+
 }
 
-object SkylightProjectionBlock : ProjectionBlock(createProperties().lightLevel { 3 })
+object SkylightProjectionBlock : ProjectionBlock<SkylightProjectionEffect>(createProperties().lightLevel { 3 }) {
+
+    override fun createProjectionEffect(
+        level: ServerLevel,
+        state: BlockState,
+        pos: BlockPos
+    ) = SkylightProjectionEffect
+
+}
+
+object SkylightProjectionEffect : ProjectionEffect() {
+
+    override val type
+        get() = SkylightProjection.effect.get()!!
+
+    override fun toNbt(tag: CompoundTag) {
+    }
+
+    override fun fromNbt(tag: CompoundTag) {
+    }
+
+}

common/src/main/kotlin/quaedam/projector/Projector.kt

@@ -0,0 +1,26 @@
+package quaedam.projector
+
+import net.minecraft.world.item.BlockItem
+import net.minecraft.world.item.Item
+import net.minecraft.world.level.block.entity.BlockEntityType
+import quaedam.Quaedam
+
+object Projector {
+
+    const val ID = "projector"
+
+    val block = Quaedam.blocks.register(ID) { ProjectorBlock }!!
+
+    val item = Quaedam.items.register(ID) {
+        BlockItem(
+            ProjectorBlock, Item.Properties()
+                .stacksTo(1)
+                .`arch$tab`(Quaedam.creativeModeTab)
+        )
+    }!!
+
+    val blockEntity = Quaedam.blockEntities.register(ID) {
+        BlockEntityType.Builder.of(::ProjectorBlockEntity, block.get()).build(null)
+    }!!
+
+}

common/src/main/kotlin/quaedam/projector/ProjectorBlock.kt

@@ -0,0 +1,84 @@
+package quaedam.projector
+
+import net.minecraft.core.BlockPos
+import net.minecraft.server.level.ServerLevel
+import net.minecraft.util.RandomSource
+import net.minecraft.world.InteractionHand
+import net.minecraft.world.InteractionResult
+import net.minecraft.world.entity.LivingEntity
+import net.minecraft.world.entity.player.Player
+import net.minecraft.world.item.ItemStack
+import net.minecraft.world.level.Level
+import net.minecraft.world.level.LevelAccessor
+import net.minecraft.world.level.block.Block
+import net.minecraft.world.level.block.EntityBlock
+import net.minecraft.world.level.block.state.BlockState
+import net.minecraft.world.level.material.MapColor
+import net.minecraft.world.phys.BlockHitResult
+import quaedam.projection.ProjectionBlock
+
+object ProjectorBlock : Block(Properties.of()
+    .jumpFactor(0.8f)
+    .lightLevel { 3 }
+    .mapColor(MapColor.COLOR_BLACK)
+    .randomTicks()
+    .strength(4.0f)
+    .requiresCorrectToolForDrops()), EntityBlock {
+
+    fun checkUpdate(level: Level, pos: BlockPos) {
+        if (!level.isClientSide) {
+            (level.getBlockEntity(pos) as ProjectorBlockEntity).checkUpdate()
+        }
+    }
+
+    @Suppress("OVERRIDE_DEPRECATION")
+    override fun use(
+        blockState: BlockState,
+        level: Level,
+        blockPos: BlockPos,
+        player: Player,
+        interactionHand: InteractionHand,
+        blockHitResult: BlockHitResult
+    ): InteractionResult {
+        checkUpdate(level, blockPos)
+        return InteractionResult.SUCCESS
+    }
+
+    override fun newBlockEntity(pos: BlockPos, state: BlockState) = ProjectorBlockEntity(pos, state)
+
+    @Suppress("OVERRIDE_DEPRECATION")
+    override fun randomTick(
+        state: BlockState,
+        level: ServerLevel,
+        pos: BlockPos,
+        random: RandomSource
+    ) {
+        // @TODO: call projectorRandomTick
+        checkUpdate(level, pos)
+    }
+
+    @Suppress("DEPRECATION", "OVERRIDE_DEPRECATION")
+    override fun neighborChanged(
+        state: BlockState,
+        level: Level,
+        pos: BlockPos,
+        sourceBlock: Block,
+        sourcePos: BlockPos,
+        notify: Boolean
+    ) {
+        super.neighborChanged(state, level, pos, sourceBlock, sourcePos, notify)
+        checkUpdate(level, pos)
+    }
+
+    override fun setPlacedBy(
+        level: Level,
+        pos: BlockPos,
+        state: BlockState,
+        placer: LivingEntity?,
+        itemStack: ItemStack
+    ) {
+        super.setPlacedBy(level, pos, state, placer, itemStack)
+        checkUpdate(level, pos)
+    }
+
+}

common/src/main/kotlin/quaedam/projector/ProjectorBlockEntity.kt

@@ -0,0 +1,126 @@
+package quaedam.projector
+
+import net.minecraft.core.BlockPos
+import net.minecraft.core.Vec3i
+import net.minecraft.nbt.CompoundTag
+import net.minecraft.network.protocol.Packet
+import net.minecraft.network.protocol.game.ClientGamePacketListener
+import net.minecraft.network.protocol.game.ClientboundBlockEntityDataPacket
+import net.minecraft.resources.ResourceLocation
+import net.minecraft.server.level.ServerLevel
+import net.minecraft.world.level.ChunkPos
+import net.minecraft.world.level.block.entity.BlockEntity
+import net.minecraft.world.level.block.state.BlockState
+import net.minecraft.world.level.levelgen.structure.BoundingBox
+import quaedam.projection.ProjectionEffect
+import quaedam.projection.ProjectionEffectType
+import quaedam.projection.ProjectionProvider
+import quaedam.utils.sendBlockUpdated
+
+class ProjectorBlockEntity(pos: BlockPos, state: BlockState) :
+    BlockEntity(Projector.blockEntity.get(), pos, state) {
+
+    companion object {
+        const val EFFECT_RADIUS = 4
+    }
+
+    val effectAreaChunk by lazy {
+        val chunk = level!!.getChunk(pos).pos
+        ChunkPos(chunk.x - EFFECT_RADIUS, chunk.z - EFFECT_RADIUS) to
+                ChunkPos(chunk.x + EFFECT_RADIUS, chunk.z + EFFECT_RADIUS)
+    }
+
+    val effectArea: BoundingBox by lazy {
+        val chunk = level!!.getChunk(pos).pos
+        val (minChunk, maxChunk) = effectAreaChunk
+        val minBlock = BlockPos(minChunk.minBlockX, level!!.minBuildHeight, minChunk.minBlockZ)
+        val maxBlock = BlockPos(maxChunk.maxBlockX, level!!.maxBuildHeight, maxChunk.maxBlockZ)
+        BoundingBox.fromCorners(minBlock, maxBlock)
+    }
+
+    val checkArea: BoundingBox by lazy {
+        BoundingBox.fromCorners(pos.offset(-2, -1, -2), pos.offset(2, -2, 2))
+    }
+
+    var effects: Map<ProjectionEffectType<*>, ProjectionEffect> = emptyMap()
+
+    override fun saveAdditional(tag: CompoundTag) {
+        super.saveAdditional(tag)
+        val effectsTag = CompoundTag()
+        effects.map { (type, effect) ->
+            effectsTag.put(type.id.toString(), effect.toNbt())
+        }
+        tag.put("ProjectionEffects", effectsTag)
+    }
+
+    override fun load(tag: CompoundTag) {
+        super.load(tag)
+        val effectsTag = tag["ProjectionEffects"]
+        val effects = mutableMapOf<ProjectionEffectType<*>, ProjectionEffect>()
+        if (effectsTag != null && effectsTag is CompoundTag) {
+            effectsTag.allKeys.forEach { id ->
+                val type = ProjectionEffectType.registry[ResourceLocation(id)]
+                if (type != null) {
+                    val effect = type.constructor().apply { fromNbt(effectsTag[id] as CompoundTag) }
+                    effects[type] = effect
+                }
+            }
+        }
+        updateEffects(effects)
+    }
+
+    override fun getUpdateTag(): CompoundTag = saveWithoutMetadata()
+
+    override fun getUpdatePacket(): Packet<ClientGamePacketListener> = ClientboundBlockEntityDataPacket.create(this)
+
+    override fun setRemoved() {
+        super.setRemoved()
+        updateEffects(emptyMap(), notify = false)
+    }
+
+    operator fun contains(pos: Vec3i) = effectArea.isInside(pos)
+
+    operator fun contains(pos: ChunkPos) =
+        this.contains(Vec3i(pos.middleBlockX, level!!.minBuildHeight, pos.middleBlockZ))
+
+    fun checkUpdate() {
+        if (level!!.isClientSide)
+            return
+        val effects = collectEffects()
+        updateEffects(effects)
+    }
+
+    fun updateEffects(effects: Map<ProjectionEffectType<*>, ProjectionEffect>, notify: Boolean = true) {
+        if (effects != this.effects) {
+            this.effects = effects
+            if (!level!!.isClientSide) {
+                sendBlockUpdated()
+            }
+        }
+    }
+
+    fun collectEffects(): Map<ProjectionEffectType<*>, ProjectionEffect> {
+        val level = level!! as ServerLevel
+        if (!level.getBlockState(blockPos.below()).isAir) {
+            return emptyMap()
+        }
+        val effects = mutableMapOf<ProjectionEffectType<*>, ProjectionEffect>()
+        for (x in checkArea.minX()..checkArea.maxX()) {
+            for (y in checkArea.minY()..checkArea.maxY()) {
+                for (z in checkArea.minZ()..checkArea.maxZ()) {
+                    val pos = BlockPos(x, y, z)
+                    val blockState = level.getBlockState(pos)
+                    val block = blockState.block
+                    if (block is ProjectionProvider<*>) {
+                        val projection = block.createProjectionEffect(level, blockState, pos)
+                        if (projection != null) {
+                            effects[projection.type] = projection
+                        }
+                    }
+                }
+            }
+        }
+        return effects
+    }
+
+}

common/src/main/kotlin/quaedam/utils/BlockEntity.kt

@@ -0,0 +1,7 @@
+package quaedam.utils
+
+import net.minecraft.world.level.block.Block
+import net.minecraft.world.level.block.entity.BlockEntity
+
+fun BlockEntity.sendBlockUpdated() =
+    level!!.sendBlockUpdated(blockPos, blockState, blockState, Block.UPDATE_CLIENTS)

common/src/main/kotlin/quaedam/utils/Chunks.kt

@@ -0,0 +1,16 @@
+package quaedam.utils
+
+import net.minecraft.core.BlockPos
+import net.minecraft.core.SectionPos
+import net.minecraft.world.level.Level
+import net.minecraft.world.level.chunk.LevelChunk
+
+fun Level.getChunksNearby(pos: BlockPos, radius: Int): Set<LevelChunk> {
+    val chunkX = SectionPos.blockToSectionCoord(pos.x)
+    val chunkZ = SectionPos.blockToSectionCoord(pos.z)
+    return (chunkX - radius..chunkX + radius).flatMap { x ->
+        (chunkZ - radius..chunkZ + radius).map { z ->
+            getChunk(x, z)
+        }
+    }.toSet()
+}

common/src/main/resources/assets/quaedam/models/item/skylight_projection.json

@@ -0,0 +1,3 @@
+{
+  "parent": "quaedam:block/skylight_projection"
+}

common/src/main/resources/quaedam-common.mixins.json

@@ -5,6 +5,7 @@
   "client": [
   ],
   "mixins": [
+    "MixinBuiltInRegistries"
   ],
   "injectors": {
     "defaultRequire": 1

common/src/main/resources/quaedam.accesswidener

@@ -1 +1,3 @@
 accessWidener   v2  named
+# Custom Registry for ProjectionEffect
+accessible method net/minecraft/core/registries/BuiltInRegistries registerSimple (Lnet/minecraft/resources/ResourceKey;Lnet/minecraft/core/registries/BuiltInRegistries$RegistryBootstrap;)Lnet/minecraft/core/Registry;