Use Overworld generation for cave and skylands Ages

src/main/java/net/dnorberg/rivencraft/book/AgeDimensionService.java

@@ -22,7 +22,6 @@ import net.minecraft.world.level.block.Blocks;
 import net.minecraft.world.level.biome.Biomes;
 import net.minecraft.world.level.biome.MultiNoiseBiomeSource;
 import net.minecraft.world.level.biome.MultiNoiseBiomeSourceParameterLists;
-import net.minecraft.world.level.biome.TheEndBiomeSource;
 import net.minecraft.world.level.chunk.ChunkGenerator;
 import net.minecraft.world.level.dimension.BuiltinDimensionTypes;
 import net.minecraft.world.level.dimension.DimensionType;
@@ -49,7 +48,7 @@ public final class AgeDimensionService {
                 loader.loadDynamicDimension(
                         age.dimensionId(),
                         createGenerator(server, age),
-                        createDimensionType(server, age)
+                        createDimensionType()
                 );
             }
             synchronizeImmersivePortals(server);
@@ -86,7 +85,7 @@ public final class AgeDimensionService {
         ServerLevel loaded = DynamicDimensionRegistry.from(server).loadDynamicDimension(
                 definition.dimensionId(),
                 createGenerator(server, definition),
-                createDimensionType(server, definition)
+                createDimensionType()
         );
         if (loaded == null) {
             Rivencraft.LOGGER.error("Failed to load Age {} as {}", definition.id(), definition.dimensionId());
@@ -208,26 +207,15 @@ public final class AgeDimensionService {
             return new FlatLevelSource(settings);
         }
 
-        var biomes = server.registryAccess().lookupOrThrow(Registries.BIOME);
         var biomeParameters = server.registryAccess()
                 .lookupOrThrow(Registries.MULTI_NOISE_BIOME_SOURCE_PARAMETER_LIST);
         var noiseSettings = server.registryAccess().lookupOrThrow(Registries.NOISE_SETTINGS);
-        if (profile.equals(AgeGenerationProfiles.CAVE)) {
-            return new NoiseBasedChunkGenerator(
-                    MultiNoiseBiomeSource.createFromPreset(
-                            biomeParameters.getOrThrow(MultiNoiseBiomeSourceParameterLists.NETHER)),
-                    noiseSettings.getOrThrow(NoiseGeneratorSettings.NETHER)
-            );
-        }
-        if (profile.equals(AgeGenerationProfiles.ISLAND)) {
-            return new NoiseBasedChunkGenerator(
-                    TheEndBiomeSource.create(biomes),
-                    noiseSettings.getOrThrow(NoiseGeneratorSettings.END)
-            );
-        }
         ResourceKey<NoiseGeneratorSettings> settingsKey = profile.equals(AgeGenerationProfiles.AMPLIFIED)
                 ? NoiseGeneratorSettings.AMPLIFIED
                 : NoiseGeneratorSettings.OVERWORLD;
+        // Cave and Island/Skylands currently describe an Age's theme. Their
+        // terrain, biomes, surfaces, structures, and features use the standard
+        // Overworld pipeline until their dedicated terrain modifiers land.
         // random_vanilla is retained as a migration alias for existing Ages.
         return new NoiseBasedChunkGenerator(
                 MultiNoiseBiomeSource.createFromPreset(
@@ -236,13 +224,7 @@ public final class AgeDimensionService {
         );
     }
 
-    private static DimensionType createDimensionType(MinecraftServer server, AgeDefinition age) {
-        if (age.generationProfile().equals(AgeGenerationProfiles.CAVE)) {
-            return copyDimensionType(server.getLevel(Level.NETHER).dimensionType());
-        }
-        if (age.generationProfile().equals(AgeGenerationProfiles.ISLAND)) {
-            return copyDimensionType(server.getLevel(Level.END).dimensionType());
-        }
+    private static DimensionType createDimensionType() {
         return new DimensionType(
                 OptionalLong.empty(),
                 true,
@@ -262,33 +244,4 @@ public final class AgeDimensionService {
         );
     }
 
-    /** Dynamic Dimensions registers one dimension-type value per Age, so each needs a distinct instance graph. */
-    private static DimensionType copyDimensionType(DimensionType type) {
-        DimensionType.MonsterSettings monsters = type.monsterSettings();
-        return new DimensionType(
-                type.fixedTime(),
-                type.hasSkyLight(),
-                type.hasCeiling(),
-                type.ultraWarm(),
-                type.natural(),
-                type.coordinateScale(),
-                type.bedWorks(),
-                type.respawnAnchorWorks(),
-                type.minY(),
-                type.height(),
-                type.logicalHeight(),
-                type.infiniburn(),
-                type.effectsLocation(),
-                type.ambientLight(),
-                new DimensionType.MonsterSettings(
-                        monsters.piglinSafe(),
-                        monsters.hasRaids(),
-                        UniformInt.of(
-                                monsters.monsterSpawnLightTest().getMinValue(),
-                                monsters.monsterSpawnLightTest().getMaxValue()
-                        ),
-                        monsters.monsterSpawnBlockLightLimit()
-                )
-        );
-    }
 }