1 files changed, 146 insertions, 0 deletions
diff --git a/src/main/kotlin/features/items/BlockZapperOverlay.kt b/src/main/kotlin/features/items/BlockZapperOverlay.kt
new file mode 100644
index 0000000..c207d67
--- /dev/null
+++ b/src/main/kotlin/features/items/BlockZapperOverlay.kt
@@ -0,0 +1,146 @@
+package moe.nea.firmament.features.items
+
+import io.github.notenoughupdates.moulconfig.ChromaColour
+import java.util.LinkedList
+import net.minecraft.block.Block
+import net.minecraft.block.BlockState
+import net.minecraft.block.Blocks
+import net.minecraft.util.hit.BlockHitResult
+import net.minecraft.util.hit.HitResult
+import net.minecraft.util.math.BlockPos
+import moe.nea.firmament.annotations.Subscribe
+import moe.nea.firmament.events.ClientStartedEvent
+import moe.nea.firmament.events.WorldKeyboardEvent
+import moe.nea.firmament.events.WorldRenderLastEvent
+import moe.nea.firmament.features.FirmamentFeature
+import moe.nea.firmament.gui.config.ManagedConfig
+import moe.nea.firmament.util.MC
+import moe.nea.firmament.util.render.RenderInWorldContext
+import moe.nea.firmament.util.skyBlockId
+import moe.nea.firmament.util.skyblock.SkyBlockItems
+
+object BlockZapperOverlay : FirmamentFeature {
+	override val identifier: String
+		get() = "block-zapper-overlay"
+
+	object TConfig : ManagedConfig(identifier, Category.ITEMS) {
+		var blockZapperOverlay by toggle("block-zapper-overlay") { false }
+		val color by colour("color") { ChromaColour.fromStaticRGB(160, 0, 0, 60) }
+		var undoKey by keyBindingWithDefaultUnbound("undo-key")
+	}
+
+	@Subscribe
+	fun onInit(event: ClientStartedEvent) {
+	}
+
+	override val config: ManagedConfig
+		get() = TConfig
+
+	val bannedZapper: List<Block> = listOf<Block>(
+		Blocks.WHEAT,
+		Blocks.CARROTS,
+		Blocks.POTATOES,
+		Blocks.PUMPKIN,
+		Blocks.PUMPKIN_STEM,
+		Blocks.MELON,
+		Blocks.MELON_STEM,
+		Blocks.CACTUS,
+		Blocks.SUGAR_CANE,
+		Blocks.NETHER_WART,
+		Blocks.TALL_GRASS,
+		Blocks.SUNFLOWER,
+		Blocks.FARMLAND,
+		Blocks.BREWING_STAND,
+		Blocks.SNOW,
+		Blocks.RED_MUSHROOM,
+		Blocks.BROWN_MUSHROOM,
+	)
+
+	private val zapperOffsets: List<BlockPos> = listOf(
+		BlockPos(0, 0, -1),
+		BlockPos(0, 0, 1),
+		BlockPos(-1, 0, 0),
+		BlockPos(1, 0, 0),
+		BlockPos(0, 1, 0),
+		BlockPos(0, -1, 0)
+	)
+
+	// Skidded from NEU
+	// Credit: https://github.com/NotEnoughUpdates/NotEnoughUpdates/blob/9b1fcfebc646e9fb69f99006327faa3e734e5f51/src/main/java/io/github/moulberry/notenoughupdates/miscfeatures/CustomItemEffects.java#L1281-L1355 (Modified)
+	@Subscribe
+	fun renderBlockZapperOverlay(event: WorldRenderLastEvent) {
+		if (!TConfig.blockZapperOverlay) return
+		val player = MC.player ?: return
+		val world = player.world ?: return
+		val heldItem = MC.stackInHand
+		if (heldItem.skyBlockId != SkyBlockItems.BLOCK_ZAPPER) return
+		val hitResult = MC.instance.crosshairTarget ?: return
+
+		val zapperBlocks: HashSet<BlockPos> = HashSet()
+		val returnablePositions = LinkedList<BlockPos>()
+
+		if (hitResult is BlockHitResult && hitResult.type == HitResult.Type.BLOCK) {
+			var pos: BlockPos = hitResult.blockPos
+			val firstBlockState: BlockState = world.getBlockState(pos)
+			val block = firstBlockState.block
+
+			val initialAboveBlock = world.getBlockState(pos.up()).block
+			if (!bannedZapper.contains(initialAboveBlock) && !bannedZapper.contains(block)) {
+				var i = 0
+				while (i < 164) {
+					zapperBlocks.add(pos)
+					returnablePositions.remove(pos)
+
+					val availableNeighbors: MutableList<BlockPos> = ArrayList()
+
+					for (offset in zapperOffsets) {
+						val newPos = pos.add(offset)
+
+						if (zapperBlocks.contains(newPos)) continue
+
+						val state: BlockState? = world.getBlockState(newPos)
+						if (state != null && state.block === block) {
+							val above = newPos.up()
+							val aboveBlock = world.getBlockState(above).block
+							if (!bannedZapper.contains(aboveBlock)) {
+								availableNeighbors.add(newPos)
+							}
+						}
+					}
+
+					if (availableNeighbors.size >= 2) {
+						returnablePositions.add(pos)
+						pos = availableNeighbors[0]
+					} else if (availableNeighbors.size == 1) {
+						pos = availableNeighbors[0]
+					} else if (returnablePositions.isEmpty()) {
+						break
+					} else {
+						i--
+						pos = returnablePositions.last()
+					}
+
+					i++
+				}
+			}
+
+			RenderInWorldContext.renderInWorld(event) {
+				if (MC.player?.isSneaking ?: false) {
+					zapperBlocks.forEach {
+						block(it, TConfig.color.getEffectiveColourRGB())
+					}
+				} else {
+					sharedVoxelSurface(zapperBlocks, TConfig.color.getEffectiveColourRGB())
+				}
+			}
+		}
+	}
+
+	@Subscribe
+	fun onWorldKeyboard(it: WorldKeyboardEvent) {
+		if (!TConfig.undoKey.isBound) return
+		if (!it.matches(TConfig.undoKey)) return
+		if (MC.stackInHand.skyBlockId != SkyBlockItems.BLOCK_ZAPPER) return
+		MC.sendCommand("undozap")
+	}
+}