[add] mob spawning

src/generated/resources/.cache/103d9f3f36b01595f1aa5172191e60eff02e6924

@@ -0,0 +1,9 @@
+// 1.21.1	2026-09-28T11:29:38.938924653	Registries
+ead89faabf72208190d381bb26c0381632944e55 data/masterwild/neoforge/biome_modifier/spawn_butterfly.json
+4abd9932549adf11cad831966565f4bccaed1b15 data/masterwild/neoforge/biome_modifier/spawn_firefly.json
+794f7cd1a27f9d8b96379fb661eab0d120cad281 data/masterwild/neoforge/biome_modifier/spawn_hedgehog.json
+a710b92e74158fa3cb4564637aa2b7d43ab28e07 data/masterwild/neoforge/biome_modifier/spawn_pinguin.json
+7ab02c57cc4ca0391ef7f89eb17bb1a8219dfb82 data/masterwild/neoforge/biome_modifier/spawn_raccoon.json
+0f98182744360df8e11851c2b6782e325689090d data/masterwild/neoforge/biome_modifier/spawn_red_panda.json
+45ddc1dc9581863936a59213ce70f641b1d35d27 data/masterwild/neoforge/biome_modifier/spawn_rooster.json
+30308b10a3b95454e8678a8324ae88285a9e7b21 data/masterwild/neoforge/biome_modifier/spawn_shark.json

src/generated/resources/data/masterwild/neoforge/biome_modifier/spawn_butterfly.json

@@ -0,0 +1,16 @@
+{
+  "type": "neoforge:add_spawns",
+  "biomes": [
+    "minecraft:flower_forest",
+    "minecraft:meadow",
+    "minecraft:sunflower_plains",
+    "minecraft:plains",
+    "minecraft:cherry_grove"
+  ],
+  "spawners": {
+    "type": "masterwild:butterfly",
+    "maxCount": 6,
+    "minCount": 3,
+    "weight": 10
+  }
+}

src/generated/resources/data/masterwild/neoforge/biome_modifier/spawn_firefly.json

@@ -0,0 +1,16 @@
+{
+  "type": "neoforge:add_spawns",
+  "biomes": [
+    "minecraft:swamp",
+    "minecraft:mangrove_swamp",
+    "minecraft:dark_forest",
+    "minecraft:flower_forest",
+    "minecraft:forest"
+  ],
+  "spawners": {
+    "type": "masterwild:firefly",
+    "maxCount": 6,
+    "minCount": 3,
+    "weight": 8
+  }
+}

src/generated/resources/data/masterwild/neoforge/biome_modifier/spawn_hedgehog.json

@@ -0,0 +1,10 @@
+{
+  "type": "neoforge:add_spawns",
+  "biomes": "#minecraft:is_forest",
+  "spawners": {
+    "type": "masterwild:hedgehog",
+    "maxCount": 3,
+    "minCount": 1,
+    "weight": 10
+  }
+}

src/generated/resources/data/masterwild/neoforge/biome_modifier/spawn_pinguin.json

@@ -0,0 +1,16 @@
+{
+  "type": "neoforge:add_spawns",
+  "biomes": [
+    "minecraft:snowy_plains",
+    "minecraft:snowy_beach",
+    "minecraft:snowy_taiga",
+    "minecraft:frozen_river",
+    "minecraft:ice_spikes"
+  ],
+  "spawners": {
+    "type": "masterwild:pinguin",
+    "maxCount": 4,
+    "minCount": 2,
+    "weight": 10
+  }
+}

src/generated/resources/data/masterwild/neoforge/biome_modifier/spawn_raccoon.json

@@ -0,0 +1,14 @@
+{
+  "type": "neoforge:add_spawns",
+  "biomes": [
+    "minecraft:plains",
+    "minecraft:forest",
+    "minecraft:birch_forest"
+  ],
+  "spawners": {
+    "type": "masterwild:raccoon",
+    "maxCount": 4,
+    "minCount": 2,
+    "weight": 20
+  }
+}

src/generated/resources/data/masterwild/neoforge/biome_modifier/spawn_red_panda.json

@@ -0,0 +1,14 @@
+{
+  "type": "neoforge:add_spawns",
+  "biomes": [
+    "minecraft:bamboo_jungle",
+    "minecraft:jungle",
+    "minecraft:cherry_grove"
+  ],
+  "spawners": {
+    "type": "masterwild:red_panda",
+    "maxCount": 3,
+    "minCount": 1,
+    "weight": 8
+  }
+}

src/generated/resources/data/masterwild/neoforge/biome_modifier/spawn_rooster.json

@@ -0,0 +1,14 @@
+{
+  "type": "neoforge:add_spawns",
+  "biomes": [
+    "minecraft:plains",
+    "minecraft:sunflower_plains",
+    "minecraft:meadow"
+  ],
+  "spawners": {
+    "type": "masterwild:rooster",
+    "maxCount": 3,
+    "minCount": 2,
+    "weight": 10
+  }
+}

src/generated/resources/data/masterwild/neoforge/biome_modifier/spawn_shark.json

@@ -0,0 +1,10 @@
+{
+  "type": "neoforge:add_spawns",
+  "biomes": "#minecraft:is_ocean",
+  "spawners": {
+    "type": "masterwild:shark",
+    "maxCount": 2,
+    "minCount": 1,
+    "weight": 3
+  }
+}

src/main/java/ovh/glitchlabs/masterwild/datagen/DataGenerators.java

@@ -34,6 +34,7 @@ public class DataGenerators {
         generator.addProvider(event.includeServer(), new ModItemTagProvider(packOutput, lookupProvider, blockTagsProvider.contentsGetter(), existingFileHelper));
 
         generator.addProvider(event.includeServer(), new ModDataMapProvider(packOutput, lookupProvider));
+        generator.addProvider(event.includeServer(), new ModDatapackProvider(packOutput, lookupProvider));
 
 
         generator.addProvider(event.includeClient(), new ModItemModelProvider(packOutput, existingFileHelper));

src/main/java/ovh/glitchlabs/masterwild/datagen/ModDatapackProvider.java

@@ -0,0 +1,29 @@
+package ovh.glitchlabs.masterwild.datagen;
+
+import net.minecraft.core.HolderLookup;
+import net.minecraft.core.RegistrySetBuilder;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.data.PackOutput;
+import net.neoforged.neoforge.common.data.DatapackBuiltinEntriesProvider;
+import net.neoforged.neoforge.registries.NeoForgeRegistries;
+import ovh.glitchlabs.masterwild.Masterwild;
+import ovh.glitchlabs.masterwild.worldgen.ModBiomeModifiers;
+import ovh.glitchlabs.masterwild.worldgen.ModConfiguredFeatures;
+import ovh.glitchlabs.masterwild.worldgen.ModPlacedFeatures;
+
+import java.util.Set;
+import java.util.concurrent.CompletableFuture;
+
+public class ModDatapackProvider extends DatapackBuiltinEntriesProvider {
+    public static final RegistrySetBuilder BUILDER = new RegistrySetBuilder()
+            //.add(Registries.TRIM_MATERIAL, ModTrimMaterials::bootstrap)
+            //.add(Registries.TRIM_PATTERN, ModTrimPatterns::bootstrap)
+            //.add(Registries.ENCHANTMENT, ModEnchantments::bootstrap)
+            .add(Registries.CONFIGURED_FEATURE, ModConfiguredFeatures::bootstrap)
+            .add(Registries.PLACED_FEATURE, ModPlacedFeatures::bootstrap)
+            .add(NeoForgeRegistries.Keys.BIOME_MODIFIERS, ModBiomeModifiers::bootstrap);
+
+    public ModDatapackProvider(PackOutput output, CompletableFuture<HolderLookup.Provider> registries) {
+        super(output, registries, BUILDER, Set.of(Masterwild.MODID));
+    }
+}

src/main/java/ovh/glitchlabs/masterwild/event/ModEventBusEvents.java

@@ -1,9 +1,14 @@
 package ovh.glitchlabs.masterwild.event;
 
+import net.minecraft.world.entity.SpawnPlacementType;
+import net.minecraft.world.entity.SpawnPlacementTypes;
+import net.minecraft.world.entity.animal.Animal;
+import net.minecraft.world.level.levelgen.Heightmap;
 import net.neoforged.bus.api.SubscribeEvent;
 import net.neoforged.fml.common.EventBusSubscriber;
 import net.neoforged.neoforge.client.event.EntityRenderersEvent;
 import net.neoforged.neoforge.event.entity.EntityAttributeCreationEvent;
+import net.neoforged.neoforge.event.entity.RegisterSpawnPlacementsEvent;
 import ovh.glitchlabs.masterwild.Masterwild;
 import ovh.glitchlabs.masterwild.entity.ModEntities;
 import ovh.glitchlabs.masterwild.entity.client.Pinguin.PinguinModel;
@@ -40,4 +45,10 @@ public class ModEventBusEvents {
         event.put(ModEntities.RED_PANDA.get(), Red_PandaEntity.createAttributes().build());
         event.put(ModEntities.RACCOON.get(), RaccoonEntity.createAttributes().build());
     }
+
+    @SubscribeEvent
+    public static void registerSpawnPlacements(RegisterSpawnPlacementsEvent event) {
+        event.register(ModEntities.RACCOON.get(), SpawnPlacementTypes.ON_GROUND, Heightmap.Types.MOTION_BLOCKING_NO_LEAVES,
+                Animal::checkAnimalSpawnRules, RegisterSpawnPlacementsEvent.Operation.REPLACE);
+    }
 }

src/main/java/ovh/glitchlabs/masterwild/event/ModSpawnPlacements.java

@@ -0,0 +1,47 @@
+package ovh.glitchlabs.masterwild.event;
+
+import net.minecraft.world.entity.SpawnPlacementTypes;
+import net.minecraft.world.entity.animal.Animal;
+import net.minecraft.world.entity.animal.WaterAnimal;
+import net.minecraft.world.level.levelgen.Heightmap;
+import net.neoforged.bus.api.SubscribeEvent;
+import net.neoforged.fml.common.EventBusSubscriber;
+import net.neoforged.neoforge.event.entity.RegisterSpawnPlacementsEvent;
+import ovh.glitchlabs.masterwild.Masterwild;
+import ovh.glitchlabs.masterwild.entity.ModEntities;
+
+@EventBusSubscriber(modid = Masterwild.MODID)
+public class ModSpawnPlacements {
+
+    @SubscribeEvent
+    public static void registerSpawnPlacements(RegisterSpawnPlacementsEvent event) {
+        event.register(ModEntities.RACCOON.get(), SpawnPlacementTypes.ON_GROUND,
+                Heightmap.Types.MOTION_BLOCKING_NO_LEAVES, Animal::checkAnimalSpawnRules,
+                RegisterSpawnPlacementsEvent.Operation.OR);
+        event.register(ModEntities.PINGUIN.get(), SpawnPlacementTypes.ON_GROUND,
+                Heightmap.Types.MOTION_BLOCKING_NO_LEAVES, Animal::checkAnimalSpawnRules,
+                RegisterSpawnPlacementsEvent.Operation.OR);
+        event.register(ModEntities.ROOSTER.get(), SpawnPlacementTypes.ON_GROUND,
+                Heightmap.Types.MOTION_BLOCKING_NO_LEAVES, Animal::checkAnimalSpawnRules,
+                RegisterSpawnPlacementsEvent.Operation.OR);
+        event.register(ModEntities.HEDGEHOG.get(), SpawnPlacementTypes.ON_GROUND,
+                Heightmap.Types.MOTION_BLOCKING_NO_LEAVES, Animal::checkAnimalSpawnRules,
+                RegisterSpawnPlacementsEvent.Operation.OR);
+        event.register(ModEntities.RED_PANDA.get(), SpawnPlacementTypes.ON_GROUND,
+                Heightmap.Types.MOTION_BLOCKING_NO_LEAVES, Animal::checkAnimalSpawnRules,
+                RegisterSpawnPlacementsEvent.Operation.OR);
+
+        event.register(ModEntities.SHARK.get(), SpawnPlacementTypes.IN_WATER,
+                Heightmap.Types.OCEAN_FLOOR, WaterAnimal::checkSurfaceWaterAnimalSpawnRules,
+                RegisterSpawnPlacementsEvent.Operation.OR);
+
+        event.register(ModEntities.FIREFLY.get(), SpawnPlacementTypes.NO_RESTRICTIONS,
+                Heightmap.Types.MOTION_BLOCKING,
+                (type, level, reason, pos, random) -> level.getLevel().isNight() && level.canSeeSky(pos),
+                RegisterSpawnPlacementsEvent.Operation.OR);
+        event.register(ModEntities.BUTTERFLY.get(), SpawnPlacementTypes.NO_RESTRICTIONS,
+                Heightmap.Types.MOTION_BLOCKING,
+                (type, level, reason, pos, random) -> level.getLevel().isDay() && level.canSeeSky(pos),
+                RegisterSpawnPlacementsEvent.Operation.OR);
+    }
+}

src/main/java/ovh/glitchlabs/masterwild/worldgen/ModBiomeModifiers.java

@@ -0,0 +1,105 @@
+package ovh.glitchlabs.masterwild.worldgen;
+
+import net.minecraft.core.HolderSet;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.data.worldgen.BootstrapContext;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.tags.BiomeTags;
+import net.minecraft.world.entity.EntityType;
+import net.minecraft.world.level.biome.Biome;
+import net.minecraft.world.level.biome.Biomes;
+import net.minecraft.world.level.biome.MobSpawnSettings;
+import net.neoforged.neoforge.common.world.BiomeModifier;
+import net.neoforged.neoforge.common.world.BiomeModifiers;
+import net.neoforged.neoforge.registries.NeoForgeRegistries;
+import ovh.glitchlabs.masterwild.Masterwild;
+import ovh.glitchlabs.masterwild.entity.ModEntities;
+
+import java.util.List;
+
+public class ModBiomeModifiers {
+
+    public static final ResourceKey<BiomeModifier> SPAWN_RACCOON = registerKey("spawn_raccoon");
+    public static final ResourceKey<BiomeModifier> SPAWN_PINGUIN = registerKey("spawn_pinguin");
+    public static final ResourceKey<BiomeModifier> SPAWN_FIREFLY = registerKey("spawn_firefly");
+    public static final ResourceKey<BiomeModifier> SPAWN_ROOSTER = registerKey("spawn_rooster");
+    public static final ResourceKey<BiomeModifier> SPAWN_SHARK = registerKey("spawn_shark");
+    public static final ResourceKey<BiomeModifier> SPAWN_HEDGEHOG = registerKey("spawn_hedgehog");
+    public static final ResourceKey<BiomeModifier> SPAWN_RED_PANDA = registerKey("spawn_red_panda");
+    public static final ResourceKey<BiomeModifier> SPAWN_BUTTERFLY = registerKey("spawn_butterfly");
+
+    public static void bootstrap(BootstrapContext<BiomeModifier> context) {
+        var placedFeatures = context.lookup(Registries.PLACED_FEATURE);
+        var biomes = context.lookup(Registries.BIOME);
+
+
+        addSpawn(context, SPAWN_RACCOON,
+                HolderSet.direct(
+                        biomes.getOrThrow(Biomes.PLAINS),
+                        biomes.getOrThrow(Biomes.FOREST),
+                        biomes.getOrThrow(Biomes.BIRCH_FOREST)),
+                ModEntities.RACCOON.get(), 20, 2, 4);
+
+        addSpawn(context, SPAWN_PINGUIN,
+                HolderSet.direct(
+                        biomes.getOrThrow(Biomes.SNOWY_PLAINS),
+                        biomes.getOrThrow(Biomes.SNOWY_BEACH),
+                        biomes.getOrThrow(Biomes.SNOWY_TAIGA),
+                        biomes.getOrThrow(Biomes.FROZEN_RIVER),
+                        biomes.getOrThrow(Biomes.ICE_SPIKES)),
+                ModEntities.PINGUIN.get(), 10, 2, 4);
+
+        addSpawn(context, SPAWN_FIREFLY,
+                HolderSet.direct(
+                        biomes.getOrThrow(Biomes.SWAMP),
+                        biomes.getOrThrow(Biomes.MANGROVE_SWAMP),
+                        biomes.getOrThrow(Biomes.DARK_FOREST),
+                        biomes.getOrThrow(Biomes.FLOWER_FOREST),
+                        biomes.getOrThrow(Biomes.FOREST)),
+                ModEntities.FIREFLY.get(), 8, 3, 6);
+
+        addSpawn(context, SPAWN_ROOSTER,
+                HolderSet.direct(
+                        biomes.getOrThrow(Biomes.PLAINS),
+                        biomes.getOrThrow(Biomes.SUNFLOWER_PLAINS),
+                        biomes.getOrThrow(Biomes.MEADOW)),
+                ModEntities.ROOSTER.get(), 10, 2, 3);
+
+        addSpawn(context, SPAWN_SHARK,
+                biomes.getOrThrow(BiomeTags.IS_OCEAN),
+                ModEntities.SHARK.get(), 3, 1, 2);
+
+        addSpawn(context, SPAWN_HEDGEHOG,
+                biomes.getOrThrow(BiomeTags.IS_FOREST),
+                ModEntities.HEDGEHOG.get(), 10, 1, 3);
+
+        addSpawn(context, SPAWN_RED_PANDA,
+                HolderSet.direct(
+                        biomes.getOrThrow(Biomes.BAMBOO_JUNGLE),
+                        biomes.getOrThrow(Biomes.JUNGLE),
+                        biomes.getOrThrow(Biomes.CHERRY_GROVE)),
+                ModEntities.RED_PANDA.get(), 8, 1, 3);
+
+        addSpawn(context, SPAWN_BUTTERFLY,
+                HolderSet.direct(
+                        biomes.getOrThrow(Biomes.FLOWER_FOREST),
+                        biomes.getOrThrow(Biomes.MEADOW),
+                        biomes.getOrThrow(Biomes.SUNFLOWER_PLAINS),
+                        biomes.getOrThrow(Biomes.PLAINS),
+                        biomes.getOrThrow(Biomes.CHERRY_GROVE)),
+                ModEntities.BUTTERFLY.get(), 10, 3, 6);
+    }
+
+    private static void addSpawn(BootstrapContext<BiomeModifier> context, ResourceKey<BiomeModifier> key,
+                                 HolderSet<Biome> biomes, EntityType<?> type, int weight, int minCount, int maxCount) {
+        context.register(key, new BiomeModifiers.AddSpawnsBiomeModifier(biomes,
+                List.of(new MobSpawnSettings.SpawnerData(type, weight, minCount, maxCount))));
+    }
+
+    private static ResourceKey<BiomeModifier> registerKey(String name) {
+        return ResourceKey.create(NeoForgeRegistries.Keys.BIOME_MODIFIERS, ResourceLocation.fromNamespaceAndPath(Masterwild.MODID, name));
+    }
+}
+
+

src/main/java/ovh/glitchlabs/masterwild/worldgen/ModConfiguredFeatures.java

@@ -0,0 +1,27 @@
+package ovh.glitchlabs.masterwild.worldgen;
+
+import net.minecraft.core.registries.Registries;
+import net.minecraft.data.worldgen.BootstrapContext;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.level.levelgen.feature.ConfiguredFeature;
+import net.minecraft.world.level.levelgen.feature.Feature;
+import net.minecraft.world.level.levelgen.feature.configurations.FeatureConfiguration;
+import ovh.glitchlabs.masterwild.Masterwild;
+
+public class ModConfiguredFeatures {
+
+    public static void bootstrap(BootstrapContext<ConfiguredFeature<?, ?>> context) {
+
+
+    }
+
+    public static ResourceKey<ConfiguredFeature<?, ?>> registerKey(String name) {
+        return ResourceKey.create(Registries.CONFIGURED_FEATURE, ResourceLocation.fromNamespaceAndPath(Masterwild.MODID, name));
+    }
+
+    private static <FC extends FeatureConfiguration, F extends Feature<FC>> void register(BootstrapContext<ConfiguredFeature<?, ?>> context,
+                                                                                          ResourceKey<ConfiguredFeature<?, ?>> key, F feature, FC configuration) {
+        context.register(key, new ConfiguredFeature<>(feature, configuration));
+    }
+}

src/main/java/ovh/glitchlabs/masterwild/worldgen/ModPlacedFeatures.java

@@ -0,0 +1,31 @@
+package ovh.glitchlabs.masterwild.worldgen;
+
+import net.minecraft.core.Holder;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.data.worldgen.BootstrapContext;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.level.levelgen.feature.ConfiguredFeature;
+import net.minecraft.world.level.levelgen.placement.PlacedFeature;
+import net.minecraft.world.level.levelgen.placement.PlacementModifier;
+import ovh.glitchlabs.masterwild.Masterwild;
+
+import java.util.List;
+
+public class ModPlacedFeatures {
+
+    public static void bootstrap(BootstrapContext<PlacedFeature> context) {
+        var configuredFeatures = context.lookup(Registries.CONFIGURED_FEATURE);
+
+
+    }
+
+    private static ResourceKey<PlacedFeature> registerKey(String name) {
+        return ResourceKey.create(Registries.PLACED_FEATURE, ResourceLocation.fromNamespaceAndPath(Masterwild.MODID, name));
+    }
+
+    private static void register(BootstrapContext<PlacedFeature> context, ResourceKey<PlacedFeature> key, Holder<ConfiguredFeature<?, ?>> configuration,
+                                 List<PlacementModifier> modifiers) {
+        context.register(key, new PlacedFeature(configuration, List.copyOf(modifiers)));
+    }
+}