Unity + Koog: 通过 Kotlin 代理驱动您的游戏
本笔记本将引导您使用模型上下文协议 (Model Context Protocol, MCP) 和 Koog 构建一个精通 Unity 的 AI 代理。我们将连接到 Unity MCP 服务器,发现工具,使用 LLM 进行规划,并针对您打开的场景执行操作。
前提条件
- 一个安装了 Unity-MCP 服务器插件的 Unity 项目
- JDK 17+
- 在
OPENAI_API_KEY环境变量中设置 OpenAI API 密钥
kotlin
%useLatestDescriptors
%use koogkotlin
lateinit var process: Process1) 提供您的 OpenAI API 密钥
我们从 OPENAI_API_KEY 环境变量中读取 API 密钥,以便您可以将敏感信息保留在笔记本之外。
kotlin
val token = System.getenv("OPENAI_API_KEY") ?: error("OPENAI_API_KEY environment variable not set")
val executor = simpleOpenAIExecutor(token)2) 配置 Unity 代理
我们为 Unity 定义了一个简洁的系统提示词和代理设置。
kotlin
val agentConfig = AIAgentConfig(
prompt = prompt("cook_agent_system_prompt") {
system {
"You are a Unity assistant. You can execute different tasks by interacting with tools from the Unity engine."
}
},
model = OpenAIModels.Chat.GPT4o,
maxAgentIterations = 1000
)kotlin
3) 启动 Unity MCP 服务器
我们将从您的 Unity 项目目录启动 Unity MCP 服务器,并通过 stdio 进行连接。
kotlin
// https://github.com/IvanMurzak/Unity-MCP
val pathToUnityProject = "path/to/unity/project"
val process = ProcessBuilder(
"$pathToUnityProject/com.ivanmurzak.unity.mcp.server/bin~/Release/net9.0/com.IvanMurzak.Unity.MCP.Server",
"60606"
).start()4) 从 Koog 连接并运行代理
我们从 Unity MCP 服务器发现工具,构建一个简单的“规划优先”策略,并运行一个仅使用工具来修改打开场景的代理。
kotlin
import kotlinx.coroutines.runBlocking
runBlocking {
// 使用来自 MCP 服务器的工具创建 ToolRegistry
val toolRegistry = McpToolRegistryProvider.fromTransport(
transport = McpToolRegistryProvider.defaultStdioTransport(process)
)
toolRegistry.tools.forEach {
println(it.name)
println(it.descriptor)
}
val strategy = strategy<String, String>("unity_interaction") {
val nodePlanIngredients by nodeLLMRequest(allowToolCalls = false)
val interactionWithUnity by subgraphWithTask<String, String>(
// 处理规划
tools = toolRegistry.tools,
) { input ->
"Start interacting with Unity according to the plan: $input"
}
edge(
nodeStart forwardTo nodePlanIngredients transformed {
"Create detailed plan for " + agentInput + "" +
"using the following tools: ${toolRegistry.tools.joinToString("
") {
it.name + "
description:" + it.descriptor
}}"
}
)
edge(nodePlanIngredients forwardTo interactionWithUnity onAssistantMessage { true })
edge(interactionWithUnity forwardTo nodeFinish)
}
val agent = AIAgent(
promptExecutor = executor,
strategy = strategy,
agentConfig = agentConfig,
toolRegistry = toolRegistry,
installFeatures = {
install(Tracing)
install(EventHandler) {
onAgentStarting { eventContext ->
println("OnAgentStarting first (strategy: ${strategy.name})")
}
onAgentStarting { eventContext ->
println("OnAgentStarting second (strategy: ${strategy.name})")
}
onAgentCompleted { eventContext ->
println(
"OnAgentCompleted (agent id: ${eventContext.agent.id}, result: ${eventContext.result})"
)
}
}
}
)
val result = agent.run(
" extend current opened scene for the towerdefence game. " +
"Add more placements for the towers, change the path for the enemies"
)
result
}5) 关闭 MCP 进程
在运行结束时,请务必清理外部 Unity MCP 服务器进程。
kotlin
// 关闭 Unity MCP 进程
process.destroy()