我们今天对 主世界建筑生成进行制作

1.在 util 包中新建 IStructure 接口

在 IStructure.java 中编写

package com.Joy187.newmod.util;

import net.minecraft.util.Mirror;
import net.minecraft.util.Rotation;
import net.minecraft.world.WorldServer;
import net.minecraft.world.gen.structure.template.PlacementSettings;
import net.minecraftforge.fml.common.FMLCommonHandler;

public interface IStructure {
    public static final WorldServer worldServer = FMLCommonHandler.instance().getMinecraftServerInstance().getWorld(0);
    public static final PlacementSettings settings = (new PlacementSettings()).setChunk(null).setIgnoreEntities(false).setIgnoreStructureBlock(false).setMirror(Mirror.NONE).setRotation(Rotation.NONE);
}

2.在world 包中新建 ModWorldGenStructure 类

在 ModWorldGenStructure.java 中编写

package com.Joy187.newmod.world;

import java.util.Random;

import com.Joy187.newmod.util.IStructure;
import com.Joy187.newmod.util.Reference;

import net.minecraft.block.state.IBlockState;
import net.minecraft.server.MinecraftServer;
import net.minecraft.util.ResourceLocation;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.World;
import net.minecraft.world.WorldServer;
import net.minecraft.world.gen.feature.WorldGenerator;
import net.minecraft.world.gen.structure.template.Template;
import net.minecraft.world.gen.structure.template.TemplateManager;

public class ModWorldGenStructure extends WorldGenerator implements IStructure{

    public static String structureName;
    public ModWorldGenStructure(String name) {
        this.structureName = name;
    }

    @Override
    public boolean generate(World worldIn, Random rand, BlockPos position) {
        this.generateStructure(worldIn, position);
        return true;
    }

    public static void generateStructure(World world,BlockPos pos) {
        MinecraftServer mcServer = world.getMinecraftServer();
        TemplateManager manager = worldServer.getStructureTemplateManager(); 
        ResourceLocation location = new ResourceLocation(Reference.Mod_ID, structureName);  
        Template template = manager.get(mcServer,location);
        if(template != null) {
            IBlockState state = world.getBlockState(pos);
            world.notifyBlockUpdate(pos, state, state, 3);
            template.addBlocksToWorldChunk(world, pos, settings);
        }
    }

}

3.在 world 包中新建ModWorldGenCustomStructure 类

在ModWorldGenCustomStructure.java 中编写

package com.Joy187.newmod.world;

import java.util.ArrayList;
import java.util.Random;

import com.Joy187.newmod.blocks.MutamyceteBlock;
import com.Joy187.newmod.init.ModBlocks;

import net.minecraft.block.Block;
import net.minecraft.init.Blocks;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.World;
import net.minecraft.world.WorldType;
import net.minecraft.world.biome.BiomePlains;
import net.minecraft.world.chunk.IChunkProvider;
import net.minecraft.world.gen.IChunkGenerator;
import net.minecraft.world.gen.feature.WorldGenerator;
import net.minecraftforge.fml.common.IWorldGenerator;
import scala.actors.threadpool.Arrays;

public class ModWorldGenCustomStructure implements IWorldGenerator{
                                            //你所要生成的建筑名称,可以写多个建筑
    public static final ModWorldGenStructure XCHAMBERX = new ModWorldGenStructure("xchamberx");

    @Override
    public void generate(Random random, int chunkX, int chunkZ, World world, IChunkGenerator chunkGenerator, IChunkProvider chunkePrvider) {
        switch(world.provider.getDimension())
        {
            case 2:
                break;
            case 1:
                break;
            case 0:                 //建筑名称 生成的时间 随机位 区块X,Z 生成概率(0~100) 在什么方块上面生成 在什么地形生成
                generateStructure(XCHAMBERX, world, random, chunkX, chunkZ, 10, Blocks.GRASS, BiomePlains.class);
                break;
            case -1:

        }
    }


    private void generateStructure(WorldGenerator generator , World world, Random random, int chunkX, int chunkZ, int chance, Block topBlock, Class<?>... classes) {

        ArrayList<Class<?>> classesList = new ArrayList<Class<?>>(Arrays.asList(classes));
        int x = (chunkX * 16) + random.nextInt(15);
        int z = (chunkZ * 16) + random.nextInt(15); 
        int y = calculateGenerationHeight(world, x, z,topBlock);
        BlockPos pos = new BlockPos(x,y,z);

        Class<?> biome = world.provider.getBiomeForCoords(pos).getClass();
        if(world.getWorldType() != WorldType.FLAT) 
        {
            if(classesList.contains(biome))
            {
                if(random.nextInt(chance) == 0)
                {
                    generator.generate(world, random, pos);
                }
            }
        }
    }

                            //计算生成高度 [0,255]层之间可生成 其余忽略
    private static int calculateGenerationHeight(World world, int x, int z, Block topBlock) {
        int y = world.getHeight();
        boolean foundGround = false;

        while(!foundGround && y-- >= 0) 
        {
            Block block = world.getBlockState(new BlockPos(x,y,z)).getBlock();
            foundGround = block == topBlock;
        }
        return y;       
    }

}

4. 在 Main.java中添加建筑生成语句:

    @EventHandler
    public static void PreInit(FMLPreInitializationEvent event)
    {
        RegistryHandler.preInitRegistries( );
        GameRegistry.registerWorldGenerator(new ModWorldGen(), 3);
        //新增建筑生成语句
        GameRegistry.registerWorldGenerator(new ModWorldGenCustomStructure(), 0);
    }

5.保存所有文件 -> 进入游戏进行建筑制作

可以在超平坦世界进行建造，建筑物建好之后要将建筑物与地面分离，也就是将建筑物下面的一层草方块全部挖空。

输入指令

/give Player minecraft:structure_block

这个名称是你进入游戏时的随机玩家名称，可在eclipse中看到：

6.点击建筑方块，设置相对定位(第一行)和建筑的大小(长宽高),调整建筑空间。

当我们的建筑正好被建筑空间包裹时，说明我们的大小已经设置好了 -> 点击保存 -> 退出游戏

7. 在 run\saves\你的世界名\structures 文档中找到 我们的 建筑.nbt文件并复制

在 resource 包中新建 structures 包，将 .nbt文件放入包中

8.保存所有代码 -> 进入游戏 -> 新建一个世界

我们将生产概率调成50，地形调为平原，在草方块上生成

在平原上成功找到所设计的建筑物!

Note: Minecraft 全地形一览