### Add Polymer Blocks Dependencies to Gradle Build

Source: https://polymer.pb4.eu/latest/polymer-blocks/getting-started

This snippet shows how to configure your Gradle build file to include the Polymer Core, Polymer Blocks, and Polymer Resource Pack modules. Ensure you replace `[TAG]` with the appropriate version number. This setup is crucial for enabling textured block support.

```gradle
repositories {
    maven { url 'https://maven.nucleoid.xyz' } // You should have it
}

dependencies {
    modImplementation include("eu.pb4:polymer-core:[TAG]")
    modImplementation include("eu.pb4:polymer-blocks:[TAG]")
    modImplementation include("eu.pb4:polymer-resource-pack:[TAG]")
}
```

--------------------------------

### Add Polymer Core Dependency (Gradle)

Source: https://polymer.pb4.eu/latest/polymer-core/getting-started

This snippet shows how to add the Polymer Core library to your project's build.gradle file. It includes the necessary Maven repository and the dependency declaration for `polymer-core`. Ensure you replace `[TAG]` with the latest version.

```gradle
repositories {
    maven { url 'https://maven.nucleoid.xyz' } // You should have it
}

dependencies {
    modImplementation include("eu.pb4:polymer-core:[TAG]")
}
```

--------------------------------

### Enable AutoHost in Polymer (Basic Setup)

Source: https://polymer.pb4.eu/latest/user/resource-pack-hosting

Enables the AutoHost module for basic server setups. Requires Polymer 0.7.1+1.20.4 or newer. After enabling, the server will automatically generate and host resource packs on startup.

```json
{
  "enabled": true
}
```

--------------------------------

### Add Polymer Resource Pack Dependency (Gradle)

Source: https://polymer.pb4.eu/latest/polymer-resource-pack/getting-started

This snippet shows how to add the Polymer resource pack module as a dependency in your Gradle build file. It includes configuring the necessary Maven repository and declaring the `modImplementation` dependency. Ensure you replace `[TAG]` with the appropriate version.

```gradle
repositories {
    maven { url 'https://maven.nucleoid.xyz' } // You should have it
}

dependencies {
    modImplementation include("eu.pb4:polymer-resource-pack:[TAG]")
}
```

--------------------------------

### Add Polymer Networking Dependency (Gradle)

Source: https://polymer.pb4.eu/latest/polymer-networking/getting-started

This snippet shows how to add the Polymer networking module to your project's dependencies using Gradle. It specifies the Maven repository and the dependency declaration, requiring you to replace `[TAG]` with the desired version.

```gradle
repositories {
    maven { url 'https://maven.nucleoid.xyz' } // You should have it
}

dependencies {
    modImplementation include("eu.pb4:polymer-networking:[TAG]")
}
```

--------------------------------

### Add Polymer Virtual Entity Dependency (Gradle)

Source: https://polymer.pb4.eu/latest/polymer-virtual-entity/getting-started

This snippet shows how to add the Polymer virtual entity module to your project's dependencies using Gradle. It includes configuring the Maven repository and declaring the module dependency. Ensure you replace `[TAG]` with the latest version.

```gradle
repositories {
    maven { url 'https://maven.nucleoid.xyz' } // You should have it
}

dependencies {
    modImplementation include("eu.pb4:polymer-virtual-entity:[TAG]")
}
```

--------------------------------

### Configure AutoHost for Proxy Setups in Polymer

Source: https://polymer.pb4.eu/latest/user/resource-pack-hosting

Configures the AutoHost module for servers behind a proxy. Requires Polymer 0.7.1+1.20.4 or newer. The `forced_address` should be set to the external address and port accessible by the proxy.

```json
{
  "enabled": true,
  "forced_address": "http://serveraddress.net:port"
}
```

--------------------------------

### Check Player Resource Pack Status (Java)

Source: https://polymer.pb4.eu/latest/polymer-resource-pack/basics

Checks if a player has the resource pack enabled by calling `PolymerResourcePackUtils.hasPack(ServerPlayerEntity player)`. This method returns a boolean indicating whether the player has the pack. The example demonstrates conditionally setting an `Identifier` based on the player's pack status.

```java
Identifier font;

if (PolymerResourcePackUtils.hasPack(player)) {
    font = Identifier.of("mymod", "myfont");
} else {
    font = Identifier.of("minecraft", "default");
}
```

--------------------------------

### Get Client-Safe BlockState Representation with Polymer

Source: https://polymer.pb4.eu/latest/polymer-core/blocks

This method retrieves a client-friendly representation of a block state. It ensures the returned block state is safe for client-side use, defaulting to air if an error occurs.

```java
PolymerBlockUtils.getBlockStateSafely(PolymerBlock block, BlockState blockState, PacketContext context);
```

--------------------------------

### Get Modded Item/Block/Entity for Compatible Client - Java

Source: https://polymer.pb4.eu/latest/polymer-core/client-side

This Java code snippet demonstrates how to return a modded object for clients that support it, falling back to a vanilla object if the client does not support the modded version. It checks the supported version of a packet using `PolymerServerNetworking.getSupportedVersion`.

```java
SomeObject getPolymerX(PacketContext context) {
    if (PolymerServerNetworking.getSupportedVersion(player.networkHandler, PACKET_ID) > 0) {
        // Client state for modded
        return this;
    } else {
        // Client state for vanilla
        return VanillaObjects.SOMETHING;
    }}

```

--------------------------------

### Generate Resource Pack Command

Source: https://polymer.pb4.eu/latest/polymer-resource-pack/basics

Generates the resource pack by executing the `/polymer generate-pack` command in-game. The generated resource pack will be saved as `polymer/resourcepack.zip` in the server's directory.

```text
/polymer generate-pack
```

--------------------------------

### Create and Configure TextDisplayElement

Source: https://polymer.pb4.eu/latest/polymer-virtual-entity/basics

Demonstrates the creation of a TextDisplayElement, setting its text content, adjusting its offset, and adding it to an ElementHolder for visibility. This API requires an ElementHolder to make virtual elements visible on the client.

```javascript
var element = new TextDisplayElement();

// Changing entity-specific property
element.setText(Text.literal("Hello world"));

// Changing offset
element.setOffset(new Vec3d(0, 5, 0));

// Adding to holder. More info below!
holder.addElement(element);
```

--------------------------------

### Implement PolymerItem Interface for Custom Items

Source: https://polymer.pb4.eu/latest/polymer-core/items

To create custom items in Polymer, they must implement the `PolymerItem` interface. This interface provides defaulted methods for managing client-side visuals. Basic implementations like `SimplePolymerItem`, `PolymerSpawnEggItem`, `PolymerBlockItem`, and `PolymerHeadBlockItem` are available for common use cases.

```java
public interface PolymerItem {
    // Defaulted methods for client-side visual manipulation
}
```

--------------------------------

### Configure AutoHost with Custom Port in Polymer

Source: https://polymer.pb4.eu/latest/user/resource-pack-hosting

Sets up AutoHost with a custom port and external address. Requires Polymer 0.4.8+1.19.4 or newer. Ensure the `external_address` is accessible externally and the port is not in use.

```json
{
  "enabled": true,
  "type": "polymer:http_server",
  "settings": {
    "port": 25567,
    "external_address": "http://localhost:25567/"
  }
}
```

--------------------------------

### Defining and Requesting Polymer Block Models

Source: https://polymer.pb4.eu/latest/polymer-blocks/basics

This snippet demonstrates how to define a block model using `PolymerBlockModel.of()` and then request it using `PolymerBlockResourceUtils.requestBlock()`. The returned blockstate is then used in a `PolymerTexturedBlock`. It also shows how to check for available blockstates.

```java
import net.minecraft.block.BlockState;
import org.betterx.bettercore.blocks.data.PolymerBlockModel;
import org.betterx.bettercore.blocks.data.PolymerBlockResourceUtils;
import org.betterx.bettercore.blocks.data.BlockModelType;

// ... inside your PolymerTexturedBlock implementation ...

@Override
public BlockState getPolymerBlockState(BlockState state) {
    PolymerBlockModel model = PolymerBlockModel.of("your_namespace:block/your_block_model");
    BlockState blockState = PolymerBlockResourceUtils.requestBlock(BlockModelType.FULL_BLOCK, model);
    if (blockState == null) {
        // Handle running out of blockstates
        return state; // Or some default state
    }
    return blockState;
}

// To check remaining blocks:
int remainingBlocks = PolymerBlockResourceUtils.getBlocksLeft(BlockModelType.FULL_BLOCK);
```

--------------------------------

### Create Server-Side Item Groups with PolymerItemGroupUtils

Source: https://polymer.pb4.eu/latest/polymer-core/items

Server-side Item Groups can be created using `PolymerItemGroupUtils.builder()`. These groups are synced with Polymer-compatible clients and can be registered using `PolymerItemGroupUtils.registerPolymerItemGroup(Identifier id, ItemGroup group)`.

```java
Identifier groupId = new Identifier("your_mod_id", "my_item_group");
ItemGroup myItemGroup = PolymerItemGroupUtils.builder(new ItemStack(Items.DIAMOND))
    .add(Items.IRON_INGOT)
    .build();
PolymerItemGroupUtils.registerPolymerItemGroup(groupId, myItemGroup);
```

--------------------------------

### Create and Manage ElementHolder

Source: https://polymer.pb4.eu/latest/polymer-virtual-entity/basics

Illustrates the process of creating an ElementHolder, adding multiple VirtualElements to it, and subsequently removing one. ElementHolders manage the ticking and sending of VirtualElement groups and can be extended for dynamic element creation.

```javascript
var holder = new ElementHolder();

var element1 = createElement(...);
var element2 = createElement(...);
var element3 = createElement(...);

// Adding elements
holder.addElement(element1);
holder.addElement(element2);
holder.addElement(element3);

// Removing elements
holder.removeElement(element3);

/* Attach here */ 
```

--------------------------------

### Add Mod Assets to Resource Pack (Java)

Source: https://polymer.pb4.eu/latest/polymer-resource-pack/basics

Marks a mod as an asset source for the resource pack by calling `PolymerResourcePackUtils.addModAssets(String modid)`. This method returns true if the mod ID is valid. It should ideally be called during mod initialization. Alternatively, assets can be added manually using `ResourcePackBuilder.addData(String path, byte[] data)` by listening to the `PolymerResourcePackUtils.RESOURCE_PACK_CREATION_EVENT`.

```java
boolean success = PolymerResourcePackUtils.addModAssets("mymod");
// Or for manual addition:
// Event.listen(PolymerResourcePackUtils.RESOURCE_PACK_CREATION_EVENT, (ResourcePackBuilder builder) -> {
//     builder.addData("assets/path/to/file.png", fileData);
// });
```

--------------------------------

### Force Items Through Polymer with ITEM_CHECK Event

Source: https://polymer.pb4.eu/latest/polymer-core/items

To ensure specific items are processed by Polymer's client-side item creation, register an event handler for the `PolymerItemUtils.ITEM_CHECK` event. This allows conditional processing based on item properties.

```java
PolymerItemUtils.ITEM_CHECK.register(
    (itemStack) -> {
        return itemStack.hasNbt() && itemStack.getNbt().contains("Test", NbtElement.STRING_TYPE);
    }
);
```

--------------------------------

### Select Base Item Type with getPolymerItem

Source: https://polymer.pb4.eu/latest/polymer-core/items

The `getPolymerItem` method determines the base item type for a given `ItemStack` and `PacketContext`. It cannot return null and can point to other `PolymerItem` instances. Ensure validation if the selection is user-configurable.

```java
@Override
public Item getPolymerItem(ItemStack itemStack, PacketContext context) {
    return itemStack.getCount() > 32 ? Items.DIAMOND_BLOCK : Items.DIAMOND;
}
```

--------------------------------

### Mark Resource Pack as Required (Java)

Source: https://polymer.pb4.eu/latest/polymer-resource-pack/basics

Marks the resource pack as required using `PolymerResourcePackUtil.markAsRequired()`. Polymer itself does not provide utilities for sending packs; this is expected to be handled by other mods or vanilla mechanisms. This setting primarily affects the resource pack on the client.

```java
PolymerResourcePackUtil.markAsRequired();
```

--------------------------------

### Force Server-Side Mining Calculation with Polymer.js

Source: https://polymer.pb4.eu/latest/polymer-core/items

Enforces server-side calculation of item mining speed using the SERVER_SIDE_MINING_CHECK event. This ensures consistent mining behavior regardless of client-side modifications. The event handler determines if server-side calculation should be applied.

```java
PolymerBlockUtils.SERVER_SIDE_MINING_CHECK.register(
    (player, pos, blockState) -> {
         var itemStack = player.getMainHandStack();
         return EnchantmentHelper.getLevel(MyEnchanments.SLOW_MINING, itemStack) > 0;
    }
);
```

--------------------------------

### Requesting an Empty Blockstate for Display Entities

Source: https://polymer.pb4.eu/latest/polymer-blocks/basics

This snippet shows how to request an empty blockstate using `PolymerBlockResourceUtils.requestEmpty()`. This is useful for creating custom blocks that are rendered using display entities, though it's noted that display entities have a higher performance impact.

```java
import net.minecraft.block.BlockState;
import org.betterx.bettercore.blocks.data.PolymerBlockResourceUtils;
import org.betterx.bettercore.blocks.data.BlockModelType;

// ... inside your PolymerTexturedBlock implementation ...

@Override
public BlockState getPolymerBlockState(BlockState state) {
    BlockState emptyBlockState = PolymerBlockResourceUtils.requestEmpty(BlockModelType.FULL_BLOCK);
    if (emptyBlockState == null) {
        // Handle potential issues, though requestEmpty is less likely to fail
        return state;
    }
    return emptyBlockState;
}
```

--------------------------------

### Send Additional Data for Custom Block Rendering with Polymer

Source: https://polymer.pb4.eu/latest/polymer-core/blocks

This method is used to send additional data for custom client-side rendering, such as for signs, heads, or companion mod features. It's ideally used for packet transmission.

```java
@Override
public void onPolymerBlockSend(BlockState blockState, BlockPos.Mutable pos, PacketContext.NotNullWithPlayer context) {
    player.networkHandler.sendPacket(this.getPolymerHeadPacket(blockState, pos.toImmutable()));
}
```

--------------------------------

### Set Player Head Skin Value with PolymerHeadBlock

Source: https://polymer.pb4.eu/latest/polymer-core/blocks

When using PolymerHeadBlock, override this method to provide the texture value for a player head. The value can be generated using external tools like mineskin.org.

```java
@Override
public String getPolymerSkinValue(BlockState state, BlockPos pos, PacketContext.NotNullWithPlayer context) {
    return "ewogICJ0aW1lc3RhbXAiIDogMTYxNzk3NjcxOTAzNSwKICAicHJvZmlsZUlkIiA6ICJlZDUzZGQ4MTRmOWQ0YTNjYjRlYjY1MWRjYmE3N2U2NiIsCiAgInByb2ZpbGVOYW1lIiA6ICI0MTQxNDE0MWgiLAogICJzaWduYXR1cmVSZXF1aXJlZCIgOiB0cnVlLAogICJ0ZXh0dXJlcyIgOiB7CiAgICAgICJTS0lOIiA6IHsKICAgICAgICAidXJsIiA6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvNTczNTE0YTIzMjQ1ZjE1ZGJhZDVmYjRlNjIyMTYzMDIwODY0Y2NlNGMxNWQ1NmRlM2FkYjkwZmE1YTcxMzdmZCIKICAgIH0KICB9Cn0";
}
```

--------------------------------

### Override getPolymerItemModel for Custom Item Models

Source: https://polymer.pb4.eu/latest/polymer-core/items

To gain finer control over an item's model, override the `getPolymerItemModel` method. By default, Polymer uses the `item_model` component set in `Item.Settings`, unless overridden by the `ItemStack`.

```java
public Identifier getPolymerItemModel(ItemStack itemStack, PacketContext context) {
    // Custom model logic here
    return new Identifier("your_mod_id", "models/item/custom_model");
}
```

--------------------------------

### Modify Client Item Appearance with Polymer.js

Source: https://polymer.pb4.eu/latest/polymer-core/items

Allows modification of client-side item stacks using the ITEM_MODIFICATION_EVENT. This can be used to hide enchantments or change item names and appearances based on NBT tags. Ensure correct NBT handling to avoid issues.

```java
PolymerItemUtils.ITEM_MODIFICATION_EVENT.register(
    (original, client, context) -> {
         if (original.hasNbt() && original.getNbt().getBoolean("HideEnchantments")) {
             client.getNbt().remove("Enchantments");

         }
         return client;
    }
);

PolymerItemUtils.ITEM_MODIFICATION_EVENT.register(
    (original, client, context) -> {
         if (original.hasNbt() && original.getNbt().contains("Test", NbtElement.STRING_TYPE)) {
             ItemStack out = new ItemStack(Items.DIAMOND_SWORD, client.getCount());
             out.setNbt(client.getNbt());
             out.setCustomName(new LiteralText("TEST VALUE: " + original.getNbt().getString("Test")).formatted(Formatting.WHITE));
             return out;
         }
         return client;
    }
);
```

--------------------------------

### Manipulate ItemStack with modifyBasePolymerItemStack

Source: https://polymer.pb4.eu/latest/polymer-core/items

The `modifyBasePolymerItemStack` method allows for manipulation of the `ItemStack` that is sent to the client. Only the `out` `ItemStack` can be modified; the `stack` `ItemStack` (server-side default) should not be altered.

```java
public void modifyBasePolymerItemStack(ItemStack out, ItemStack stack, PacketContext context) {
    // Modify the 'out' ItemStack for client-side representation
    out.getOrCreateNbt().putString("custom_tag", "value");
}
```

--------------------------------

### Modify Held Items for Entities with Polymer

Source: https://polymer.pb4.eu/latest/polymer-core/entities

Implement getPolymerVisibleEquipment to customize the items an entity appears to be holding. This method allows for replacing or adding items to specific equipment slots, such as replacing a helmet with a Wither Skeleton Skull.

```java
@Override
public List<Pair<EquipmentSlot, ItemStack>> getPolymerVisibleEquipment(List<Pair<EquipmentSlot, ItemStack>> items, ServerPlayerEntities player) {
    var list = new ArrayList<Pair<EquipmentSlot, ItemStack>>(map.size());
    for (var entry : items) {
        if (entry.getKey() == EquipmentSlot.HEAD) {
            continue;
        } else {
            list.add(Pair.of(entry.getKey(), entry.getValue()));
        }
    }
    list.add(new Pair<>(EquipmentSlot.HEAD, new ItemStack(Items.WITHER_SKELETON_SKULL)));

    return list;
}
```

--------------------------------

### Attach ElementHolder with Ticking EntityAttachment

Source: https://polymer.pb4.eu/latest/polymer-virtual-entity/basics

Shows how to attach an ElementHolder to an entity using EntityAttachment.ofTicking, which automatically handles the ticking of the attached elements. This is one of the built-in HolderAttachments for connecting ElementHolders to their position and ticking.

```javascript
var holder = new ElementHolder();

/* ... */

EntityAttachment.ofTicking(holder, player);
```

--------------------------------

### Override Block Type with Polymer

Source: https://polymer.pb4.eu/latest/polymer-core/blocks

This method allows you to specify a different base block type for your Polymer block. It must return a non-null Block instance. Be cautious when returning configurable blocks, ensuring proper validation.

```java
@Override
public Block getPolymerBlock(BlockState state, PacketContext context) {
    return Blocks.BARRIER;
}

public Block getPolymerBlock(ServerPlayerEntity player, BlockState state) {
    return Something.isRedTeam(player) ? Blocks.RED_WOOL : Blocks.BLUE_WOOL;
}
```

--------------------------------

### Modify Client-Side and Collision BlockStates with Polymer

Source: https://polymer.pb4.eu/latest/polymer-core/blocks

Override this method to change the block state visible on the client and used for server-side collisions. You can return other PolymerBlock states, but nesting is limited to 32 levels.

```java
@Override
public BlockState getPolymerBlockState(BlockState state, PacketContext context) {
    return Blocks.FURNACE.getDefaultState()
            .with(AbstractFurnaceBlock.FACING, state.get(AbstractFurnaceBlock.FACING))
            .with(AbstractFurnaceBlock.LIT, !state.get(AbstractFurnaceBlock.LIT));
}
```

--------------------------------

### Register BlockEntityType to Exclude from Client with Polymer

Source: https://polymer.pb4.eu/latest/polymer-core/blocks

To prevent a BlockEntity from being sent to the client, register its BlockEntityType using this utility method. This ensures that only server-side data is processed.

```java
PolymerBlockUtils.registerBlockEntity(BlockEntityType types);
```

--------------------------------

### Change Entity Visual Type with Polymer

Source: https://polymer.pb4.eu/latest/polymer-core/entities

Override the getPolymerEntityType method to specify the visual representation of an entity on the client side. This method must return a valid EntityType and cannot be null. It's crucial for defining how the entity appears to players.

```java
@Override
public EntityType<?> getPolymerEntityType(PacketContext context) {
    return EntityType.ZOMBIE;
}
```

--------------------------------

### Modify Client-Side Data Trackers with Polymer

Source: https://polymer.pb4.eu/latest/polymer-core/entities

Use the modifyRawTrackedData method to directly alter DataTracker values sent to the client. This provides granular control over entity appearance and behavior, but requires careful handling to avoid client-side errors by ensuring DataTracker.Entry types exist on the client.

```java
@Override
public void modifyRawTrackedData(List<DataTracker.SerializedEntry<?>> data, ServerPlayerEntity player, boolean initial) {
    data.add(DataTracker.SerializedEntry.of(VillagerEntityAccessor.getVillagerData(), new VillagerData(VillagerType.JUNGLE, VillagerProfession.FARMER, 3);));
}
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.