mirror of
https://github.com/Mr-dayhappy/Minecraft-place-mod.git
synced 2026-10-23 01:53:39 +08:00
AxTps
eba2bdd5e3
原版 PlaceCommand.placeStructure 只调 StructureStart.placeInChunk 摆放方块，从不把 StructureStart 注册进 StructureManager / 区块 StructureAccess，导致结构重启丢失、专属刷怪规则不激活。 新增 PlaceCommandMixin，在 placeStructure 返回前补做自然生成的三步：1) setStartForStructure 把 start 存进所在区块；2) createReferences 写 17x17 邻居引用；3) markUnsaved 强制存盘。全程 try-catch 兜底，注册失败不影响命令返回。 项目骨架参照 CarpetSLSAddition：Loom 1.18-SNAPSHOT + Gradle 9.7.1 + Java 25 + official 映射。
88 lines
3.9 KiB
Java
88 lines
3.9 KiB
Java
package com.github.axtps.placemod.mixin;
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import com.github.axtps.placemod.PlaceMod;
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import net.minecraft.core.SectionPos;
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import net.minecraft.server.commands.PlaceCommand;
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import net.minecraft.server.level.ServerLevel;
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import net.minecraft.world.level.ChunkPos;
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import net.minecraft.world.level.StructureManager;
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import net.minecraft.world.level.chunk.ChunkAccess;
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import net.minecraft.world.level.chunk.ChunkGenerator;
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import net.minecraft.world.level.levelgen.structure.BoundingBox;
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import net.minecraft.world.level.levelgen.structure.Structure;
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import net.minecraft.world.level.levelgen.structure.StructureStart;
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import org.spongepowered.asm.mixin.Mixin;
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import org.spongepowered.asm.mixin.injection.At;
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import org.spongepowered.asm.mixin.injection.Inject;
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import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
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import org.spongepowered.asm.mixin.injection.callback.LocalCapture;
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/**
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* 让 /place structure 生成的结构"跟自然生成一样"。
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*
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* 原版 PlaceCommand.placeStructure 只调了 StructureStart.placeInChunk 摆放方块，
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* 从不把 StructureStart 注册进 StructureManager / 区块 StructureAccess。
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* 结果：结构不进 StructureManager、不写区块 NBT 引用 → 重启丢失、专属刷怪规则不激活。
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*
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* 本 Mixin 在 placeStructure 返回前，补做自然生成的注册步骤：
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* 1. 对结构所在区块 setStartForStructure，把 start 存进区块；
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* 2. 调 ChunkGenerator.createReferences 写周围区块引用（跟自然生成同款逻辑）；
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* 3. markUnsaved 标记涉及的区块，强制存盘。
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*/
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@Mixin(PlaceCommand.class)
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public class PlaceCommandMixin {
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@Inject(method = "placeStructure", at = @At("RETURN"), locals = LocalCapture.CAPTURE_FAILHARD)
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private static void placemod$registerStructure(net.minecraft.commands.CommandSourceStack source,
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net.minecraft.core.Holder.Reference<Structure> structureHolder,
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net.minecraft.core.BlockPos pos,
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CallbackInfo ci,
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ServerLevel level,
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Structure structure,
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ChunkGenerator generator,
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StructureStart start) {
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if (start == null || !start.isValid()) {
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return;
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}
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try {
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StructureManager structureManager = level.structureManager();
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BoundingBox box = start.getBoundingBox();
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// 结构包围盒覆盖的区块范围
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ChunkPos minChunk = new ChunkPos(
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SectionPos.blockToSectionCoord(box.minX()),
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SectionPos.blockToSectionCoord(box.minZ()));
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ChunkPos maxChunk = new ChunkPos(
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SectionPos.blockToSectionCoord(box.maxX()),
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SectionPos.blockToSectionCoord(box.maxZ()));
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// 1) 把 StructureStart 存进它自己所在的区块
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// （自然生成在 ChunkGenerator.createStructures 里做）
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ChunkPos startChunk = start.getChunkPos();
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ChunkAccess startChunkAccess = level.getChunk(startChunk.x(), startChunk.z());
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structureManager.setStartForStructure(
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SectionPos.bottomOf(startChunkAccess), structure, start, startChunkAccess);
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startChunkAccess.markUnsaved();
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// 2) 引用写入：对涉及的每个区块调 createReferences，
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// 它内部会扫 17x17 邻居，把相交的 StructureStart 引用写进区块。
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// 跟自然生成用的是同一个方法，保证"完全一样"。
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ChunkPos.rangeClosed(minChunk, maxChunk).forEach(cp -> {
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ChunkAccess chunk = level.getChunk(cp.x(), cp.z());
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try {
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generator.createReferences(level, structureManager, chunk);
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chunk.markUnsaved();
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} catch (Exception e) {
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PlaceMod.LOGGER.error("[place-mod] createReferences 失败 @ {}: {}", cp, e.toString());
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}
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});
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PlaceMod.LOGGER.info("[place-mod] 已为结构 {} 补注册 StructureStart @ {}",
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structure, startChunk);
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} catch (Throwable t) {
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// 注册失败不能影响命令本身的成功返回
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PlaceMod.LOGGER.error("[place-mod] 补注册结构时出错（已忽略）: ", t);
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}
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}
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} |