Initial sanctuary sources

2026-07-04 20:27:08 +02:00
commit c796a20321
1582 changed files with 253264 additions and 0 deletions
@@ -0,0 +1,13 @@
+package fr.koka99cab.happy_creeper.client;
+
+import fr.koka99cab.happy_creeper.client.renderer.HappyCreeperRenderer;
+import fr.koka99cab.happy_creeper.registry.ModEntityTypes;
+import net.fabricmc.fabric.api.client.rendering.v1.EntityRendererRegistry;
+import net.fabricmc.api.ClientModInitializer;
+
+public final class HappyCreeperClient implements ClientModInitializer {
+	@Override
+	public void onInitializeClient() {
+		EntityRendererRegistry.register(ModEntityTypes.HAPPY_CREEPER, HappyCreeperRenderer::new);
+	}
+}
@@ -0,0 +1,41 @@
+package fr.koka99cab.happy_creeper.client.model;
+
+import fr.koka99cab.happy_creeper.client.renderer.HappyCreeperRenderState;
+import net.minecraft.client.model.EntityModel;
+import net.minecraft.client.model.HeadedModel;
+import net.minecraft.client.model.geom.ModelPart;
+import net.minecraft.util.Mth;
+
+public final class HappyCreeperModel extends EntityModel<HappyCreeperRenderState> implements HeadedModel {
+	private final ModelPart head;
+	private final ModelPart rightHindLeg;
+	private final ModelPart leftHindLeg;
+	private final ModelPart rightFrontLeg;
+	private final ModelPart leftFrontLeg;
+
+	public HappyCreeperModel(ModelPart modelPart) {
+		super(modelPart);
+		this.head = modelPart.getChild("head");
+		this.leftHindLeg = modelPart.getChild("right_hind_leg");
+		this.rightHindLeg = modelPart.getChild("left_hind_leg");
+		this.leftFrontLeg = modelPart.getChild("right_front_leg");
+		this.rightFrontLeg = modelPart.getChild("left_front_leg");
+	}
+
+	@Override
+	public void setupAnim(HappyCreeperRenderState happyCreeperRenderState) {
+		this.head.yRot = happyCreeperRenderState.yRot * Mth.DEG_TO_RAD;
+		this.head.xRot = happyCreeperRenderState.xRot * Mth.DEG_TO_RAD;
+		float walkPosition = happyCreeperRenderState.walkAnimationPos;
+		float walkSpeed = happyCreeperRenderState.walkAnimationSpeed;
+		this.rightHindLeg.xRot = Mth.cos(walkPosition * 0.6662F) * 1.4F * walkSpeed;
+		this.leftHindLeg.xRot = Mth.cos(walkPosition * 0.6662F + Mth.PI) * 1.4F * walkSpeed;
+		this.rightFrontLeg.xRot = Mth.cos(walkPosition * 0.6662F + Mth.PI) * 1.4F * walkSpeed;
+		this.leftFrontLeg.xRot = Mth.cos(walkPosition * 0.6662F) * 1.4F * walkSpeed;
+	}
+
+	@Override
+	public ModelPart getHead() {
+		return this.head;
+	}
+}
@@ -0,0 +1,58 @@
+package fr.koka99cab.happy_creeper.client.renderer;
+
+import com.mojang.blaze3d.vertex.PoseStack;
+import com.mojang.math.Axis;
+import fr.koka99cab.happy_creeper.client.model.HappyCreeperModel;
+import net.minecraft.client.renderer.SubmitNodeCollector;
+import net.minecraft.client.renderer.block.BlockModelRenderState;
+import net.minecraft.client.renderer.entity.LivingEntityRenderer;
+import net.minecraft.client.renderer.entity.RenderLayerParent;
+import net.minecraft.client.renderer.entity.layers.RenderLayer;
+
+public final class HappyCreeperFlowerLayer extends RenderLayer<HappyCreeperRenderState, HappyCreeperModel> {
+	public HappyCreeperFlowerLayer(RenderLayerParent<HappyCreeperRenderState, HappyCreeperModel> renderLayerParent) {
+		super(renderLayerParent);
+	}
+
+	@Override
+	public void submit(PoseStack poseStack, SubmitNodeCollector submitNodeCollector, int packedLight, HappyCreeperRenderState happyCreeperRenderState, float limbAngle, float limbDistance) {
+		BlockModelRenderState flowerBlock = happyCreeperRenderState.flowerBlock;
+
+		if (flowerBlock.isEmpty()) {
+			return;
+		}
+
+		boolean renderOutline = happyCreeperRenderState.appearsGlowing() && happyCreeperRenderState.isInvisible;
+		if (happyCreeperRenderState.isInvisible && !renderOutline) {
+			return;
+		}
+
+		int overlay = LivingEntityRenderer.getOverlayCoords(happyCreeperRenderState, 0.0F);
+
+		poseStack.pushPose();
+		this.getParentModel().getHead().translateAndRotate(poseStack);
+		poseStack.translate(0.0F, -0.72F, 0.0F);
+		poseStack.mulPose(Axis.YP.rotationDegrees(-45.0F));
+		poseStack.scale(-0.7F, -0.7F, 0.7F);
+		poseStack.translate(-0.5F, -0.5F, -0.5F);
+		this.submitFlowerBlock(poseStack, submitNodeCollector, packedLight, renderOutline, happyCreeperRenderState.outlineColor, flowerBlock, overlay);
+		poseStack.popPose();
+	}
+
+	private void submitFlowerBlock(
+		PoseStack poseStack,
+		SubmitNodeCollector submitNodeCollector,
+		int packedLight,
+		boolean renderOutline,
+		int outlineColor,
+		BlockModelRenderState flowerBlock,
+		int overlay
+	) {
+		if (renderOutline) {
+			flowerBlock.submitOnlyOutline(poseStack, submitNodeCollector, packedLight, overlay, outlineColor);
+			return;
+		}
+
+		flowerBlock.submit(poseStack, submitNodeCollector, packedLight, overlay, outlineColor);
+	}
+}
@@ -0,0 +1,39 @@
+package fr.koka99cab.happy_creeper.client.renderer;
+
+import fr.koka99cab.happy_creeper.client.model.HappyCreeperModel;
+import net.minecraft.client.model.geom.EntityModelSet;
+import net.minecraft.client.model.geom.ModelLayers;
+import net.minecraft.client.renderer.entity.RenderLayerParent;
+import net.minecraft.client.renderer.entity.layers.EnergySwirlLayer;
+import net.minecraft.resources.Identifier;
+
+public final class HappyCreeperPowerLayer extends EnergySwirlLayer<HappyCreeperRenderState, HappyCreeperModel> {
+	private static final Identifier POWER_TEXTURE = Identifier.withDefaultNamespace("textures/entity/creeper/creeper_armor.png");
+
+	private final HappyCreeperModel model;
+
+	public HappyCreeperPowerLayer(RenderLayerParent<HappyCreeperRenderState, HappyCreeperModel> renderLayerParent, EntityModelSet entityModelSet) {
+		super(renderLayerParent);
+		this.model = new HappyCreeperModel(entityModelSet.bakeLayer(ModelLayers.CREEPER_ARMOR));
+	}
+
+	@Override
+	protected boolean isPowered(HappyCreeperRenderState happyCreeperRenderState) {
+		return happyCreeperRenderState.isPowered;
+	}
+
+	@Override
+	protected float xOffset(float ageInTicks) {
+		return ageInTicks * 0.01F;
+	}
+
+	@Override
+	protected Identifier getTextureLocation() {
+		return POWER_TEXTURE;
+	}
+
+	@Override
+	protected HappyCreeperModel model() {
+		return this.model;
+	}
+}
@@ -0,0 +1,8 @@
+package fr.koka99cab.happy_creeper.client.renderer;
+
+import net.minecraft.client.renderer.block.BlockModelRenderState;
+import net.minecraft.client.renderer.entity.state.CreeperRenderState;
+
+public final class HappyCreeperRenderState extends CreeperRenderState {
+	public final BlockModelRenderState flowerBlock = new BlockModelRenderState();
+}
@@ -0,0 +1,60 @@
+package fr.koka99cab.happy_creeper.client.renderer;
+
+import fr.koka99cab.happy_creeper.HappyCreeperMod;
+import fr.koka99cab.happy_creeper.client.model.HappyCreeperModel;
+import fr.koka99cab.happy_creeper.entity.HappyCreeperEntity;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.model.geom.ModelLayers;
+import net.minecraft.client.renderer.block.BlockModelResolver;
+import net.minecraft.client.renderer.block.model.BlockDisplayContext;
+import net.minecraft.client.renderer.entity.EntityRendererProvider;
+import net.minecraft.client.renderer.entity.MobRenderer;
+import net.minecraft.resources.Identifier;
+
+public final class HappyCreeperRenderer extends MobRenderer<HappyCreeperEntity, HappyCreeperRenderState, HappyCreeperModel> {
+	private static final BlockDisplayContext BLOCK_DISPLAY_CONTEXT = BlockDisplayContext.create();
+	private static final Identifier CREEPER_TEXTURE = Identifier.fromNamespaceAndPath(HappyCreeperMod.MOD_ID, "textures/entity/creeper.png");
+	private static final Identifier HAPPY_CREEPER_TEXTURE = Identifier.fromNamespaceAndPath(HappyCreeperMod.MOD_ID, "textures/entity/happy_creeper.png");
+	private static final Identifier FALLBACK_TEXTURE = Identifier.withDefaultNamespace("textures/entity/creeper/creeper.png");
+
+	private final BlockModelResolver blockModelResolver;
+
+	public HappyCreeperRenderer(EntityRendererProvider.Context context) {
+		super(context, new HappyCreeperModel(context.bakeLayer(ModelLayers.CREEPER)), 0.5F);
+		this.blockModelResolver = context.getBlockModelResolver();
+		this.addLayer(new HappyCreeperPowerLayer(this, context.getModelSet()));
+		this.addLayer(new HappyCreeperFlowerLayer(this));
+	}
+
+	@Override
+	public Identifier getTextureLocation(HappyCreeperRenderState happyCreeperRenderState) {
+		if (!Minecraft.getInstance().getResourceManager().getResourceStack(CREEPER_TEXTURE).isEmpty()) {
+			return CREEPER_TEXTURE;
+		}
+
+		if (!Minecraft.getInstance().getResourceManager().getResourceStack(HAPPY_CREEPER_TEXTURE).isEmpty()) {
+			return HAPPY_CREEPER_TEXTURE;
+		}
+
+		return FALLBACK_TEXTURE;
+	}
+
+	@Override
+	public HappyCreeperRenderState createRenderState() {
+		return new HappyCreeperRenderState();
+	}
+
+	@Override
+	public void extractRenderState(HappyCreeperEntity happyCreeperEntity, HappyCreeperRenderState happyCreeperRenderState, float partialTick) {
+		super.extractRenderState(happyCreeperEntity, happyCreeperRenderState, partialTick);
+		happyCreeperRenderState.isPowered = happyCreeperEntity.isPowered();
+		happyCreeperRenderState.swelling = 0.0F;
+
+		if (happyCreeperEntity.hasFlower()) {
+			this.blockModelResolver.update(happyCreeperRenderState.flowerBlock, happyCreeperEntity.getFlowerBlockStateForRendering(), BLOCK_DISPLAY_CONTEXT);
+			return;
+		}
+
+		happyCreeperRenderState.flowerBlock.clear();
+	}
+}
@@ -0,0 +1,19 @@
+package fr.koka99cab.happy_creeper;
+
+import fr.koka99cab.happy_creeper.registry.ModEntityTypes;
+import fr.koka99cab.happy_creeper.registry.ModEntityInteractions;
+import net.fabricmc.api.ModInitializer;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public final class HappyCreeperMod implements ModInitializer {
+	public static final String MOD_ID = "happy_creeper";
+	public static final Logger LOGGER = LoggerFactory.getLogger(MOD_ID);
+
+	@Override
+	public void onInitialize() {
+		ModEntityTypes.register();
+		ModEntityInteractions.register();
+		LOGGER.info("Happy Creeper is waking up");
+	}
+}
@@ -0,0 +1,350 @@
+package fr.koka99cab.happy_creeper.entity;
+
+import fr.koka99cab.happy_creeper.entity.ai.HappyCreeperFollowPlayerGoal;
+import fr.koka99cab.happy_creeper.registry.ModEntityTypes;
+import java.util.List;
+import java.util.UUID;
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.registries.BuiltInRegistries;
+import net.minecraft.network.syncher.EntityDataAccessor;
+import net.minecraft.network.syncher.EntityDataSerializers;
+import net.minecraft.network.syncher.SynchedEntityData;
+import net.minecraft.resources.Identifier;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.sounds.SoundEvent;
+import net.minecraft.sounds.SoundEvents;
+import net.minecraft.util.RandomSource;
+import net.minecraft.world.DifficultyInstance;
+import net.minecraft.world.InteractionHand;
+import net.minecraft.world.InteractionResult;
+import net.minecraft.world.damagesource.DamageSource;
+import net.minecraft.world.entity.AgeableMob;
+import net.minecraft.world.entity.ConversionParams;
+import net.minecraft.world.entity.EntitySpawnReason;
+import net.minecraft.world.entity.EntityType;
+import net.minecraft.world.entity.Mob;
+import net.minecraft.world.entity.SpawnGroupData;
+import net.minecraft.world.entity.ai.attributes.AttributeSupplier;
+import net.minecraft.world.entity.ai.attributes.Attributes;
+import net.minecraft.world.entity.ai.goal.BreedGoal;
+import net.minecraft.world.entity.ai.goal.FloatGoal;
+import net.minecraft.world.entity.ai.goal.FollowParentGoal;
+import net.minecraft.world.entity.ai.goal.LookAtPlayerGoal;
+import net.minecraft.world.entity.ai.goal.RandomLookAroundGoal;
+import net.minecraft.world.entity.ai.goal.WaterAvoidingRandomStrollGoal;
+import net.minecraft.world.entity.animal.Animal;
+import net.minecraft.world.entity.monster.Monster;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.item.Item;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.Items;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.ServerLevelAccessor;
+import net.minecraft.world.level.block.Block;
+import net.minecraft.world.level.block.Blocks;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.storage.ValueInput;
+import net.minecraft.world.level.storage.ValueOutput;
+
+public final class HappyCreeperEntity extends Animal {
+	private static final EntityDataAccessor<String> FLOWER_ID = SynchedEntityData.defineId(HappyCreeperEntity.class, EntityDataSerializers.STRING);
+	private static final EntityDataAccessor<Boolean> HAS_FLOWER = SynchedEntityData.defineId(HappyCreeperEntity.class, EntityDataSerializers.BOOLEAN);
+	private static final EntityDataAccessor<Boolean> IS_POWERED = SynchedEntityData.defineId(HappyCreeperEntity.class, EntityDataSerializers.BOOLEAN);
+	private static final List<Item> FLOWERS = List.of(
+		Items.DANDELION,
+		Items.POPPY,
+		Items.BLUE_ORCHID,
+		Items.ALLIUM,
+		Items.AZURE_BLUET,
+		Items.RED_TULIP,
+		Items.ORANGE_TULIP,
+		Items.WHITE_TULIP,
+		Items.PINK_TULIP,
+		Items.OXEYE_DAISY,
+		Items.CORNFLOWER,
+		Items.LILY_OF_THE_VALLEY,
+		Items.TORCHFLOWER
+	);
+
+	private static final String FLOWER_ID_KEY = "HappyFlowerId";
+	private static final String HAS_FLOWER_KEY = "HappyFlowerReady";
+	private static final String FLOWER_REGROW_TICKS_KEY = "HappyFlowerRegrowTicks";
+	private static final String FOLLOW_TARGET_KEY = "HappyFollowTarget";
+	private static final String POWERED_KEY = "HappyPowered";
+	private static final int FLOWER_MIN_REGROW_TICKS = 20 * 45;
+	private static final int FLOWER_MAX_REGROW_TICKS = 20 * 90;
+
+	private UUID rememberedPlayerUuid;
+	private int flowerRegrowTicks;
+
+	public HappyCreeperEntity(EntityType<? extends HappyCreeperEntity> entityType, Level level) {
+		super(entityType, level);
+	}
+
+	public static AttributeSupplier.Builder createAttributes() {
+		return Animal.createAnimalAttributes()
+			.add(Attributes.MAX_HEALTH, 20.0D)
+			.add(Attributes.MOVEMENT_SPEED, 0.25D)
+			.add(Attributes.FOLLOW_RANGE, 32.0D);
+	}
+
+	public static boolean canSpawn(EntityType<HappyCreeperEntity> entityType, ServerLevelAccessor level, EntitySpawnReason spawnReason, BlockPos blockPos, RandomSource random) {
+		return Mob.checkMobSpawnRules(entityType, level, spawnReason, blockPos, random)
+			&& Monster.isDarkEnoughToSpawn(level, blockPos, random);
+	}
+
+	@Override
+	protected void defineSynchedData(SynchedEntityData.Builder builder) {
+		super.defineSynchedData(builder);
+		builder.define(FLOWER_ID, "");
+		builder.define(HAS_FLOWER, true);
+		builder.define(IS_POWERED, false);
+	}
+
+	@Override
+	protected void registerGoals() {
+		this.goalSelector.addGoal(0, new FloatGoal(this));
+		this.goalSelector.addGoal(1, new BreedGoal(this, 1.0D));
+		this.goalSelector.addGoal(2, new HappyCreeperFollowPlayerGoal(this, 1.1D, 2.5F));
+		this.goalSelector.addGoal(3, new FollowParentGoal(this, 1.1D));
+		this.goalSelector.addGoal(4, new WaterAvoidingRandomStrollGoal(this, 0.95D));
+		this.goalSelector.addGoal(5, new LookAtPlayerGoal(this, Player.class, 8.0F));
+		this.goalSelector.addGoal(6, new RandomLookAroundGoal(this));
+	}
+
+	@Override
+	protected void customServerAiStep(ServerLevel serverLevel) {
+		super.customServerAiStep(serverLevel);
+		this.ensureFlowerAssigned();
+
+		if (this.rememberedPlayerUuid == null && this.tickCount % 20 == 0) {
+			this.rememberNearbyPlayer(serverLevel);
+		}
+
+		if (!this.hasFlower() && this.flowerRegrowTicks > 0) {
+			this.flowerRegrowTicks--;
+
+			if (this.flowerRegrowTicks == 0) {
+				this.setFlowerReady(true);
+			}
+		}
+	}
+
+	@Override
+	public SpawnGroupData finalizeSpawn(ServerLevelAccessor level, DifficultyInstance difficulty, EntitySpawnReason spawnReason, SpawnGroupData spawnGroupData) {
+		SpawnGroupData finalizedSpawn = super.finalizeSpawn(level, difficulty, spawnReason, spawnGroupData);
+		this.assignRandomFlower();
+		this.setFlowerReady(true);
+		this.flowerRegrowTicks = 0;
+		return finalizedSpawn;
+	}
+
+	@Override
+	protected void addAdditionalSaveData(ValueOutput output) {
+		super.addAdditionalSaveData(output);
+		output.putString(FLOWER_ID_KEY, this.entityData.get(FLOWER_ID));
+		output.putBoolean(HAS_FLOWER_KEY, this.hasFlower());
+		output.putInt(FLOWER_REGROW_TICKS_KEY, this.flowerRegrowTicks);
+		output.putBoolean(POWERED_KEY, this.isPowered());
+
+		if (this.rememberedPlayerUuid != null) {
+			output.putString(FOLLOW_TARGET_KEY, this.rememberedPlayerUuid.toString());
+		}
+	}
+
+	@Override
+	protected void readAdditionalSaveData(ValueInput input) {
+		super.readAdditionalSaveData(input);
+		String flowerId = input.getStringOr(FLOWER_ID_KEY, "");
+		this.entityData.set(FLOWER_ID, flowerId);
+		this.entityData.set(HAS_FLOWER, input.getBooleanOr(HAS_FLOWER_KEY, true));
+		this.entityData.set(IS_POWERED, input.getBooleanOr(POWERED_KEY, false));
+		this.flowerRegrowTicks = input.getIntOr(FLOWER_REGROW_TICKS_KEY, 0);
+		this.rememberedPlayerUuid = null;
+
+		input.getString(FOLLOW_TARGET_KEY).ifPresent(uuid -> {
+			try {
+				this.rememberedPlayerUuid = UUID.fromString(uuid);
+			} catch (IllegalArgumentException ignored) {
+				this.rememberedPlayerUuid = null;
+			}
+		});
+
+		this.ensureFlowerAssigned();
+	}
+
+	@Override
+	public boolean isFood(ItemStack itemStack) {
+		return itemStack.is(Blocks.MOSS_BLOCK.asItem()) || itemStack.is(Blocks.MOSS_CARPET.asItem());
+	}
+
+	@Override
+	public InteractionResult mobInteract(Player player, InteractionHand interactionHand) {
+		ItemStack heldItem = player.getItemInHand(interactionHand);
+
+		if (heldItem.is(Items.SHEARS) && this.hasFlower()) {
+			if (this.level().isClientSide()) {
+				return InteractionResult.SUCCESS;
+			}
+
+			this.shearFlower(heldItem, player, interactionHand);
+			return InteractionResult.SUCCESS_SERVER;
+		}
+
+		return super.mobInteract(player, interactionHand);
+	}
+
+	@Override
+	public HappyCreeperEntity getBreedOffspring(ServerLevel serverLevel, AgeableMob ageableMob) {
+		HappyCreeperEntity baby = ModEntityTypes.HAPPY_CREEPER.create(serverLevel, EntitySpawnReason.BREEDING);
+
+		if (baby != null) {
+			baby.assignRandomFlower();
+			baby.setFlowerReady(true);
+		}
+
+		return baby;
+	}
+
+	@Override
+	protected SoundEvent getHurtSound(DamageSource damageSource) {
+		return SoundEvents.CREEPER_HURT;
+	}
+
+	@Override
+	protected SoundEvent getDeathSound() {
+		return SoundEvents.CREEPER_DEATH;
+	}
+
+	@Override
+	public void thunderHit(ServerLevel serverLevel, net.minecraft.world.entity.LightningBolt lightningBolt) {
+		super.thunderHit(serverLevel, lightningBolt);
+		this.setPowered(true);
+	}
+
+	public boolean hasFlower() {
+		return this.entityData.get(HAS_FLOWER);
+	}
+
+	public boolean isPowered() {
+		return this.entityData.get(IS_POWERED);
+	}
+
+	public ItemStack getFlowerStackForRendering() {
+		if (!this.hasFlower()) {
+			return ItemStack.EMPTY;
+		}
+
+		return new ItemStack(this.getFlowerItem());
+	}
+
+	public BlockState getFlowerBlockStateForRendering() {
+		if (!this.hasFlower()) {
+			return Blocks.AIR.defaultBlockState();
+		}
+
+		Block block = Block.byItem(this.getFlowerItem());
+		return block.defaultBlockState();
+	}
+
+	public void setFlowerItem(Item flowerItem) {
+		Identifier flowerId = BuiltInRegistries.ITEM.getKey(flowerItem);
+		this.entityData.set(FLOWER_ID, flowerId.toString());
+		this.setFlowerReady(true);
+		this.flowerRegrowTicks = 0;
+	}
+
+	public void setPowered(boolean powered) {
+		this.entityData.set(IS_POWERED, powered);
+	}
+
+	public Player getRememberedPlayer() {
+		if (this.rememberedPlayerUuid == null || !(this.level() instanceof ServerLevel serverLevel)) {
+			return null;
+		}
+
+		return serverLevel.getPlayerByUUID(this.rememberedPlayerUuid);
+	}
+
+	public void rememberPlayer(Player player) {
+		this.rememberedPlayerUuid = player.getUUID();
+	}
+
+	private void shearFlower(ItemStack shears, Player player, InteractionHand interactionHand) {
+		if (!(this.level() instanceof ServerLevel serverLevel)) {
+			return;
+		}
+
+		this.playSound(SoundEvents.SHEEP_SHEAR, 1.0F, 1.0F);
+		this.spawnAtLocation(serverLevel, new ItemStack(this.getFlowerItem()));
+		shears.hurtAndBreak(1, player, interactionHand);
+		this.convertTo(EntityType.CREEPER, ConversionParams.single(this, false, false), EntitySpawnReason.CONVERSION, creeper -> {
+			MobConversionUtil.copyCommonState(this, creeper);
+
+			if (this.isPowered()) {
+				net.minecraft.world.entity.LightningBolt lightningBolt = this.createConversionLightning(serverLevel, creeper);
+				if (lightningBolt != null) {
+					creeper.thunderHit(serverLevel, lightningBolt);
+				}
+			}
+		});
+	}
+
+	private net.minecraft.world.entity.LightningBolt createConversionLightning(ServerLevel serverLevel, Mob target) {
+		net.minecraft.world.entity.LightningBolt lightningBolt = EntityType.LIGHTNING_BOLT.create(serverLevel, EntitySpawnReason.TRIGGERED);
+		if (lightningBolt != null) {
+			lightningBolt.copyPosition(target);
+		}
+
+		return lightningBolt;
+	}
+
+	private void ensureFlowerAssigned() {
+		if (this.entityData.get(FLOWER_ID).isEmpty()) {
+			this.assignRandomFlower();
+		}
+	}
+
+	private void assignRandomFlower() {
+		Item flower = FLOWERS.get(this.random.nextInt(FLOWERS.size()));
+		this.setFlowerItem(flower);
+	}
+
+	private Item getFlowerItem() {
+		Identifier flowerId = Identifier.tryParse(this.entityData.get(FLOWER_ID));
+
+		if (flowerId == null) {
+			return Items.DANDELION;
+		}
+
+		return BuiltInRegistries.ITEM.getOptional(flowerId).orElse(Items.DANDELION);
+	}
+
+	private void setFlowerReady(boolean hasFlower) {
+		this.entityData.set(HAS_FLOWER, hasFlower);
+	}
+
+	private void rememberNearbyPlayer(ServerLevel serverLevel) {
+		Player rememberedPlayer = null;
+		double bestDistanceSquared = 12.0D * 12.0D;
+
+		for (Player player : serverLevel.players()) {
+			if (!player.isAlive() || player.isSpectator()) {
+				continue;
+			}
+
+			double distanceSquared = this.distanceToSqr(player);
+
+			if (distanceSquared > bestDistanceSquared || !this.hasLineOfSight(player)) {
+				continue;
+			}
+
+			rememberedPlayer = player;
+			bestDistanceSquared = distanceSquared;
+		}
+
+		if (rememberedPlayer != null) {
+			this.rememberedPlayerUuid = rememberedPlayer.getUUID();
+		}
+	}
+}
@@ -0,0 +1,36 @@
+package fr.koka99cab.happy_creeper.entity;
+
+import net.minecraft.world.entity.Mob;
+
+public final class MobConversionUtil {
+	private MobConversionUtil() {
+	}
+
+	public static <T extends Mob> void copyCommonState(Mob source, T target) {
+		target.copyPosition(source);
+		target.setYRot(source.getYRot());
+		target.setXRot(source.getXRot());
+		target.setYBodyRot(source.yBodyRot);
+		target.setYHeadRot(source.getYHeadRot());
+		target.yBodyRotO = source.yBodyRotO;
+		target.yHeadRotO = source.yHeadRotO;
+		target.setDeltaMovement(source.getDeltaMovement());
+		target.setPose(source.getPose());
+		target.setHealth(Math.min(target.getMaxHealth(), source.getHealth()));
+		target.setSilent(source.isSilent());
+		target.setInvulnerable(source.isInvulnerable());
+
+		if (source.isPersistenceRequired()) {
+			target.setPersistenceRequired();
+		}
+
+		if (source.isNoAi()) {
+			target.setNoAi(true);
+		}
+
+		if (source.hasCustomName()) {
+			target.setCustomName(source.getCustomName());
+			target.setCustomNameVisible(source.isCustomNameVisible());
+		}
+	}
+}
@@ -0,0 +1,70 @@
+package fr.koka99cab.happy_creeper.entity.ai;
+
+import fr.koka99cab.happy_creeper.entity.HappyCreeperEntity;
+import java.util.EnumSet;
+import net.minecraft.world.entity.ai.goal.Goal;
+import net.minecraft.world.entity.player.Player;
+
+public final class HappyCreeperFollowPlayerGoal extends Goal {
+	private final HappyCreeperEntity happyCreeper;
+	private final double speedModifier;
+	private final float stopDistance;
+	private Player player;
+	private int recalculatePathTicks;
+
+	public HappyCreeperFollowPlayerGoal(HappyCreeperEntity happyCreeper, double speedModifier, float stopDistance) {
+		this.happyCreeper = happyCreeper;
+		this.speedModifier = speedModifier;
+		this.stopDistance = stopDistance;
+		this.setFlags(EnumSet.of(Goal.Flag.MOVE, Goal.Flag.LOOK));
+	}
+
+	@Override
+	public boolean canUse() {
+		this.player = this.happyCreeper.getRememberedPlayer();
+		return this.player != null && this.player.isAlive();
+	}
+
+	@Override
+	public boolean canContinueToUse() {
+		this.player = this.happyCreeper.getRememberedPlayer();
+		return this.player != null && this.player.isAlive();
+	}
+
+	@Override
+	public void start() {
+		this.recalculatePathTicks = 0;
+	}
+
+	@Override
+	public void stop() {
+		this.player = null;
+		this.happyCreeper.getNavigation().stop();
+	}
+
+	@Override
+	public boolean requiresUpdateEveryTick() {
+		return true;
+	}
+
+	@Override
+	public void tick() {
+		if (this.player == null) {
+			return;
+		}
+
+		this.happyCreeper.getLookControl().setLookAt(this.player, 10.0F, this.happyCreeper.getMaxHeadXRot());
+		double distanceToPlayer = this.happyCreeper.distanceToSqr(this.player);
+		double stopDistanceSquared = this.stopDistance * this.stopDistance;
+
+		if (distanceToPlayer <= stopDistanceSquared) {
+			this.happyCreeper.getNavigation().stop();
+			return;
+		}
+
+		if (this.recalculatePathTicks-- <= 0) {
+			this.recalculatePathTicks = 10;
+			this.happyCreeper.getNavigation().moveTo(this.player, this.speedModifier);
+		}
+	}
+}
@@ -0,0 +1,62 @@
+package fr.koka99cab.happy_creeper.registry;
+
+import fr.koka99cab.happy_creeper.entity.HappyCreeperEntity;
+import fr.koka99cab.happy_creeper.entity.MobConversionUtil;
+import net.fabricmc.fabric.api.event.player.UseEntityCallback;
+import net.minecraft.tags.ItemTags;
+import net.minecraft.world.InteractionHand;
+import net.minecraft.world.InteractionResult;
+import net.minecraft.world.entity.ConversionParams;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.entity.EntitySpawnReason;
+import net.minecraft.world.entity.monster.Creeper;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.phys.EntityHitResult;
+
+public final class ModEntityInteractions {
+	private ModEntityInteractions() {
+	}
+
+	public static void register() {
+		UseEntityCallback.EVENT.register(ModEntityInteractions::interactWithEntity);
+	}
+
+	private static InteractionResult interactWithEntity(Player player, Level level, InteractionHand interactionHand, Entity entity, EntityHitResult entityHitResult) {
+		if (!(entity instanceof Creeper creeper)) {
+			return InteractionResult.PASS;
+		}
+
+		ItemStack heldItem = player.getItemInHand(interactionHand);
+		if (!heldItem.is(ItemTags.FLOWERS)) {
+			return InteractionResult.PASS;
+		}
+
+		if (level.isClientSide()) {
+			return InteractionResult.SUCCESS;
+		}
+
+		HappyCreeperEntity happyCreeper = creeper.convertTo(
+			ModEntityTypes.HAPPY_CREEPER,
+			ConversionParams.single(creeper, false, false),
+			EntitySpawnReason.CONVERSION,
+			convertedHappyCreeper -> {
+				MobConversionUtil.copyCommonState(creeper, convertedHappyCreeper);
+				convertedHappyCreeper.setPowered(creeper.isPowered());
+				convertedHappyCreeper.setFlowerItem(heldItem.getItem());
+				convertedHappyCreeper.rememberPlayer(player);
+			}
+		);
+
+		if (happyCreeper == null) {
+			return InteractionResult.PASS;
+		}
+
+		if (!player.getAbilities().instabuild) {
+			heldItem.shrink(1);
+		}
+
+		return InteractionResult.SUCCESS_SERVER;
+	}
+}
@@ -0,0 +1,41 @@
+package fr.koka99cab.happy_creeper.registry;
+
+import fr.koka99cab.happy_creeper.HappyCreeperMod;
+import fr.koka99cab.happy_creeper.entity.HappyCreeperEntity;
+import net.fabricmc.fabric.api.biome.v1.BiomeModifications;
+import net.fabricmc.fabric.api.biome.v1.BiomeSelectors;
+import net.fabricmc.fabric.api.object.builder.v1.entity.FabricEntityTypeBuilder;
+import net.minecraft.core.Registry;
+import net.minecraft.core.registries.BuiltInRegistries;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.resources.Identifier;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.world.entity.EntityDimensions;
+import net.minecraft.world.entity.EntityType;
+import net.minecraft.world.entity.MobCategory;
+import net.minecraft.world.entity.SpawnPlacementTypes;
+import net.minecraft.world.level.levelgen.Heightmap;
+
+public final class ModEntityTypes {
+	public static final Identifier HAPPY_CREEPER_ID = Identifier.fromNamespaceAndPath(HappyCreeperMod.MOD_ID, "happy_creeper");
+	public static final EntityType<HappyCreeperEntity> HAPPY_CREEPER = Registry.register(
+		BuiltInRegistries.ENTITY_TYPE,
+		HAPPY_CREEPER_ID,
+		FabricEntityTypeBuilder.createMob()
+			.mobCategory(MobCategory.CREATURE)
+			.entityFactory(HappyCreeperEntity::new)
+			.dimensions(EntityDimensions.scalable(0.6F, 1.7F))
+			.defaultAttributes(HappyCreeperEntity::createAttributes)
+			.spawnPlacement(SpawnPlacementTypes.ON_GROUND, Heightmap.Types.MOTION_BLOCKING_NO_LEAVES, HappyCreeperEntity::canSpawn)
+			.trackRangeBlocks(10)
+			.trackedUpdateRate(2)
+			.build(ResourceKey.create(Registries.ENTITY_TYPE, HAPPY_CREEPER_ID))
+	);
+
+	private ModEntityTypes() {
+	}
+
+	public static void register() {
+		BiomeModifications.addSpawn(BiomeSelectors.spawnsOneOf(EntityType.CREEPER), MobCategory.CREATURE, HAPPY_CREEPER, 5, 1, 1);
+	}
+}
@@ -0,0 +1,3 @@
+{
+  "entity.happy_creeper.happy_creeper": "Happy Creeper"
+}
@@ -0,0 +1,3 @@
+{
+  "entity.happy_creeper.happy_creeper": "Happy Creeper"
+}
@@ -0,0 +1,27 @@
+{
+	"schemaVersion": 1,
+	"id": "happy_creeper",
+	"version": "${version}",
+	"name": "Happy-Creeper",
+	"description": "Adds a passive Happy Creeper that follows players, carries a persistent flower, and can breed with moss.",
+	"authors": [
+		"KOKA99CAB"
+	],
+	"license": "LGPL-3.0-or-later",
+	"icon": "assets/happy_creeper/icon.png",
+	"environment": "*",
+	"entrypoints": {
+		"main": [
+			"fr.koka99cab.happy_creeper.HappyCreeperMod"
+		],
+		"client": [
+			"fr.koka99cab.happy_creeper.client.HappyCreeperClient"
+		]
+	},
+	"depends": {
+		"fabricloader": ">=0.19.2",
+		"minecraft": "~26.1.2",
+		"java": ">=25",
+		"fabric-api": "*"
+	}
+}