Unity-MCP

# Unity SDK ## Overview The Unity SDK is a C# library that Unity developers can use in their projects to interact with the Unity-MCP system. It provides a clean, simple API for logging information, writing results, and communicating with AI assistants. ## Purpose The Unity SDK fulfills several critical roles in the Unity-MCP architecture: 1. **Developer API**: Provides a clean, simple API for Unity developers 2. **Data Communication**: Allows Unity code to write data that becomes available to the MCP client 3. **Abstraction Layer**: Abstracts away the communication details with the Web Server 4. **Bidirectional Communication**: Enables bidirectional communication between Unity games and AI assistants ## Implementation The Unity SDK is implemented as a C# library with a simple, fluent API that makes it easy for Unity developers to interact with the system. ### Key Components 1. **AI Class**: The main entry point for the SDK 2. **Result Class**: Represents a named result that can be written to, appended to, or cleared 3. **Integration Bridge**: Connects the SDK to the Unity Integration 4. **Serialization Utilities**: Handles serialization of data for communication ## Code Example ```csharp using UnityEngine; using System; using System.Collections.Generic; namespace UnityMCP { /// <summary> /// The main entry point for the Unity MCP SDK. /// </summary> public static class AI { private static UnityMCPIntegration integration; /// <summary> /// Gets a reference to a named result. /// </summary> /// <param name="name">The name of the result.</param> /// <returns>A Result object that can be used to write, append, or clear data.</returns> public static Result Result(string name) { return new Result(name); } /// <summary> /// Logs a message that will be available to AI assistants. /// </summary> /// <param name="message">The message to log.</param> public static void Log(string message) { Result("log").Append(message); } /// <summary> /// Logs an error message that will be available to AI assistants. /// </summary> /// <param name="message">The error message to log.</param> public static void LogError(string message) { Result("error").Append(message); } /// <summary> /// Logs a warning message that will be available to AI assistants. /// </summary> /// <param name="message">The warning message to log.</param> public static void LogWarning(string message) { Result("warning").Append(message); } /// <summary> /// Registers the Unity Integration with the SDK. /// This is called by the Unity Integration when it starts. /// </summary> /// <param name="integration">The Unity Integration instance.</param> internal static void RegisterIntegration(UnityMCPIntegration integration) { AI.integration = integration; } /// <summary> /// Sends data to the Web Server. /// This is used internally by the Result class. /// </summary> /// <param name="resultName">The name of the result.</param> /// <param name="data">The data to send.</param> internal static void SendData(string resultName, object data) { if (integration == null) { Debug.LogWarning("[Unity MCP SDK] Cannot send data: Integration not registered"); return; } integration.SendData(resultName, data); } } /// <summary> /// Represents a named result that can be written to, appended to, or cleared. /// </summary> public class Result { private string name; /// <summary> /// Creates a new Result with the specified name. /// </summary> /// <param name="name">The name of the result.</param> public Result(string name) { this.name = name; } /// <summary> /// Writes data to the result, replacing any existing data. /// </summary> /// <param name="data">The data to write.</param> public void Write(object data) { AI.SendData(name, new ResultData { action = "write", data = data }); } /// <summary> /// Appends data to the result, preserving existing data. /// </summary> /// <param name="data">The data to append.</param> public void Append(object data) { AI.SendData(name, new ResultData { action = "append", data = data }); } /// <summary> /// Clears the result, removing all data. /// </summary> public void Clear() { AI.SendData(name, new ResultData { action = "clear", data = null }); } } /// <summary> /// Represents data sent to a result. /// </summary> [Serializable] internal class ResultData { public string action; public object data; } } ``` ## API Reference ### AI Class The `AI` class is the main entry point for the SDK. It provides methods for getting references to named results and logging messages. #### Methods - **Result(string name)** - Description: Gets a reference to a named result - Parameters: - `name` (string): The name of the result - Returns: A `Result` object that can be used to write, append, or clear data - **Log(string message)** - Description: Logs a message that will be available to AI assistants - Parameters: - `message` (string): The message to log - **LogError(string message)** - Description: Logs an error message that will be available to AI assistants - Parameters: - `message` (string): The error message to log - **LogWarning(string message)** - Description: Logs a warning message that will be available to AI assistants - Parameters: - `message` (string): The warning message to log ### Result Class The `Result` class represents a named result that can be written to, appended to, or cleared. #### Methods - **Write(object data)** - Description: Writes data to the result, replacing any existing data - Parameters: - `data` (object): The data to write - **Append(object data)** - Description: Appends data to the result, preserving existing data - Parameters: - `data` (object): The data to append - **Clear()** - Description: Clears the result, removing all data ## Usage Examples ### Basic Usage ```csharp using UnityEngine; using UnityMCP; public class Player : MonoBehaviour { private void Start() { // Log a message AI.Log("Player started"); // Write player stats AI.Result("player_stats").Write(new { health = 100, position = transform.position }); } private void Update() { // Update player stats AI.Result("player_position").Write(transform.position); } public void TakeDamage(int amount) { // Log damage AI.Log($"Player took {amount} damage"); // Update health int health = GetComponent<Health>().CurrentHealth; AI.Result("player_health").Write(health); } } ``` ### Advanced Usage ```csharp using UnityEngine; using UnityMCP; using System.Collections.Generic; public class GameManager : MonoBehaviour { private List<string> gameEvents = new List<string>(); private void Start() { // Clear any existing game events AI.Result("game_events").Clear(); } public void LogGameEvent(string eventName, object eventData) { // Create a timestamped event var gameEvent = new { name = eventName, data = eventData, timestamp = System.DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") }; // Add to local list gameEvents.Add(JsonUtility.ToJson(gameEvent)); // Append to game events result AI.Result("game_events").Append(gameEvent); // Also log a simple message AI.Log($"Game event: {eventName}"); } public void SaveGameState() { // Save the current game state var gameState = new { level = UnityEngine.SceneManagement.SceneManager.GetActiveScene().name, playerPosition = GameObject.FindWithTag("Player").transform.position, enemies = GameObject.FindGameObjectsWithTag("Enemy").Length, gameEvents = gameEvents }; // Write the game state AI.Result("game_state").Write(gameState); AI.Log("Game state saved"); } } ``` ## Integration with Unity The Unity SDK is designed to be easy to integrate into Unity projects: 1. **Import the SDK**: Import the Unity SDK package into your Unity project 2. **Add the Integration**: Add the Unity Integration prefab to your scene 3. **Use the API**: Use the `AI` class to interact with the system ## Thread Safety The Unity SDK is designed to be thread-safe, allowing it to be used from any thread in Unity: - **Main Thread**: All Unity API calls are made on the main thread - **Background Threads**: Data can be sent from background threads - **Coroutines**: The SDK can be used from coroutines ## Performance Considerations When using the Unity SDK, consider the following performance implications: 1. **Data Size**: Large data objects may impact performance. Consider sending only the necessary data. 2. **Update Frequency**: Frequent updates may impact performance. Consider throttling updates for rapidly changing values. 3. **Serialization**: Complex objects may be expensive to serialize. Consider using simple data structures. ## Security Considerations When using the Unity SDK, consider the following security implications: 1. **Sensitive Data**: Be careful not to expose sensitive data through the SDK 2. **User Privacy**: Respect user privacy by not logging personal information 3. **Access Control**: Implement access control to restrict who can access the data ## Conclusion The Unity SDK is a critical component of the Unity-MCP architecture, providing a clean, simple API for Unity developers to interact with the system. It enables bidirectional communication between Unity games and AI assistants, allowing for a wide range of applications.