Got a world preset!

src/main/java/com/cyao/PaperWorldGenerator.java

@@ -1,17 +1,44 @@
 package com.cyao;
 
+import com.mojang.serialization.MapCodec;
+import com.mojang.serialization.codecs.RecordCodecBuilder;
 import net.minecraft.block.BlockState;
 import net.minecraft.block.Blocks;
 import net.minecraft.registry.entry.RegistryEntry;
+import net.minecraft.world.ChunkRegion;
+import net.minecraft.world.biome.source.BiomeAccess;
 import net.minecraft.world.biome.source.BiomeSource;
+import net.minecraft.world.chunk.Chunk;
+import net.minecraft.world.gen.GenerationStep;
+import net.minecraft.world.gen.StructureAccessor;
 import net.minecraft.world.gen.chunk.ChunkGeneratorSettings;
 import net.minecraft.world.gen.chunk.NoiseChunkGenerator;
+import net.minecraft.world.gen.noise.NoiseConfig;
 
 public class PaperWorldGenerator extends NoiseChunkGenerator {
+    public static final MapCodec<PaperWorldGenerator> CODEC = RecordCodecBuilder.mapCodec(
+            instance -> instance.group(
+                            BiomeSource.CODEC.fieldOf("biome_source").forGetter(generator -> generator.biomeSource),
+                            ChunkGeneratorSettings.REGISTRY_CODEC.fieldOf("settings").forGetter(NoiseChunkGenerator::getSettings)
+                    )
+                    .apply(instance, instance.stable(PaperWorldGenerator::new))
+    );
     private static final BlockState AIR = Blocks.AIR.getDefaultState();
 
 	public PaperWorldGenerator(BiomeSource biomeSource, RegistryEntry<ChunkGeneratorSettings> settings) {
         super(biomeSource, settings);
-        System.out.println("Hello Paper Chunk Generator!");
+    }
+
+    @Override
+    public void carve(
+            ChunkRegion chunkRegion,
+            long seed,
+            NoiseConfig noiseConfig,
+            BiomeAccess biomeAccess,
+            StructureAccessor structureAccessor,
+            Chunk chunk,
+            GenerationStep.Carver carverStep
+    ) {
+        FlatMinecraft.LOGGER.info("Carving!");
     }
 }

src/main/java/com/cyao/mixin/WordPresetMixin.java

@@ -36,10 +36,12 @@ public abstract class WordPresetMixin {
 
     @Inject(method = "bootstrap()V", at = @At("RETURN"), remap = false)
     private void addPresets(CallbackInfo ci) {
+        /*
         this.register(PAPER_WORLD, this.createOverworldOptions(
                 new PaperWorldGenerator(
                         MultiNoiseBiomeSource.create(this.multiNoisePresetLookup.getOrThrow(MultiNoiseBiomeSourceParameterLists.OVERWORLD)),
                         this.chunkGeneratorSettingsLookup.getOrThrow(ChunkGeneratorSettings.OVERWORLD))
         ));
+         */
     }
 }