用unity 写一份与https://api.openai.com/v1/chat/completions通讯的代码

下面是一个简单的 Unity C# 代码示例，用于与 OpenAI GPT-3 的 API 进行通信，以获得 AI 回复：

using System.Collections;
using UnityEngine;
using UnityEngine.Networking;
using UnityEngine.UI;

public class OpenAIChat : MonoBehaviour
{
    public string apiKey;
    public string prompt;
    public int maxTokens;
    public float temperature;

    public Text responseText;

    private const string API_URL = "https://api.openai.com/v1/engines/davinci-codex/completions";

    public void SendRequest()
    {
        StartCoroutine(GetResponse());
    }

    private IEnumerator GetResponse()
    {
        var requestJson = "{\"prompt\": \"" + prompt + "\", \"max_tokens\": " + maxTokens + ", \"temperature\": " + temperature + "}";
        var request = UnityWebRequest.Post(API_URL, requestJson);
        request.SetRequestHeader("Content-Type", "application/json");
        request.SetRequestHeader("Authorization", "Bearer " + apiKey);

        yield return request.SendWebRequest();

        if (request.result == UnityWebRequest.Result.ConnectionError || request.result == UnityWebRequest.Result.ProtocolError)
        {
            Debug.LogError(request.error);
            yield break;
        }

        var responseJson = request.downloadHandler.text;
        var response = JsonUtility.FromJson<OpenAIResponse>(responseJson);

        if (response.choices == null || response.choices.Length == 0)
        {
            Debug.LogError("Invalid response from OpenAI API");
            yield break;
        }

        responseText.text = response.choices[0].text;
    }

    [System.Serializable]
    public class OpenAIResponse
    {
        public Choice[] choices;
    }

    [System.Serializable]
    public class Choice
    {
        public string text;
        public float logprobs;
        public float finishReason;
    }
}

要使用此代码，请将其添加到 Unity 游戏对象上，并在编辑器中设置 API 密钥、提示、最大标记和温度。然后，在您的 UI 上添加一个按钮或其他交互元素，以调用 SendRequest 方法并显示响应文本。

请注意，此示例使用 UnityWebRequest 类与 OpenAI API 进行通信。您还可以使用其他网络库，如 HttpClient 或 RestSharp。